Merge pull request #18533 from rmuir/painless_more_whitelisting

improve painless whitelist coverage of java api

modules/lang-painless/src/main/java/org/elasticsearch/painless/Definition.java

@@ -38,7 +38,14 @@ import java.util.Objects;
  */
 public final class Definition {
     
-    private static final String DEFINITION_FILE = "definition.txt";
+    private static final List<String> DEFINITION_FILES = Collections.unmodifiableList(
+        Arrays.asList("org.elasticsearch.txt", 
+                      "java.lang.txt",
+                      "java.math.txt",
+                      "java.text.txt",
+                      "java.util.txt",
+                      "java.util.function.txt",
+                      "java.util.stream.txt"));
 
     private static final Definition INSTANCE = new Definition();
 
@@ -158,15 +165,13 @@ public final class Definition {
         public final Struct owner;
         public final List<Type> arguments;
         public final org.objectweb.asm.commons.Method method;
-        public final java.lang.reflect.Constructor<?> reflect;
 
-        private Constructor(final String name, final Struct owner, final List<Type> arguments,
-                            final org.objectweb.asm.commons.Method method, final java.lang.reflect.Constructor<?> reflect) {
+        private Constructor(String name, Struct owner, List<Type> arguments,
+                            org.objectweb.asm.commons.Method method) {
             this.name = name;
             this.owner = owner;
             this.arguments = Collections.unmodifiableList(arguments);
             this.method = method;
-            this.reflect = reflect;
         }
     }
 
@@ -176,18 +181,17 @@ public final class Definition {
         public final Type rtn;
         public final List<Type> arguments;
         public final org.objectweb.asm.commons.Method method;
-        public final java.lang.reflect.Method reflect;
+        public final int modifiers;
         public final MethodHandle handle;
 
-        private Method(final String name, final Struct owner, final Type rtn, final List<Type> arguments,
-                       final org.objectweb.asm.commons.Method method, final java.lang.reflect.Method reflect,
-                       final MethodHandle handle) {
+        private Method(String name, Struct owner, Type rtn, List<Type> arguments,
+                       org.objectweb.asm.commons.Method method, int modifiers, MethodHandle handle) {
             this.name = name;
             this.owner = owner;
             this.rtn = rtn;
             this.arguments = Collections.unmodifiableList(arguments);
             this.method = method;
-            this.reflect = reflect;
+            this.modifiers = modifiers;
             this.handle = handle;
         }
     }
@@ -196,16 +200,17 @@ public final class Definition {
         public final String name;
         public final Struct owner;
         public final Type type;
-        public final java.lang.reflect.Field reflect;
-        public final MethodHandle getter;
-        public final MethodHandle setter;
+        public final String javaName;
+        public final int modifiers;
+        private final MethodHandle getter;
+        private final MethodHandle setter;
 
-        private Field(final String name, final Struct owner, final Type type,
-                      final java.lang.reflect.Field reflect, final MethodHandle getter, final MethodHandle setter) {
+        private Field(String name, String javaName, Struct owner, Type type, int modifiers, MethodHandle getter, MethodHandle setter) {
             this.name = name;
+            this.javaName = javaName;
             this.owner = owner;
             this.type = type;
-            this.reflect = reflect;
+            this.modifiers = modifiers;
             this.getter = getter;
             this.setter = setter;
         }
@@ -436,9 +441,10 @@ public final class Definition {
     /** adds classes from definition. returns hierarchy */
     private Map<String,List<String>> addStructs() {
         final Map<String,List<String>> hierarchy = new HashMap<>();
+        for (String file : DEFINITION_FILES) {
             int currentLine = -1;
             try {
-            try (InputStream stream = Definition.class.getResourceAsStream(DEFINITION_FILE);
+                try (InputStream stream = Definition.class.getResourceAsStream(file);
                         LineNumberReader reader = new LineNumberReader(new InputStreamReader(stream, StandardCharsets.UTF_8))) {
                     String line = null;
                     while ((line = reader.readLine()) != null) {
@@ -495,16 +501,18 @@ public final class Definition {
                     }
                 }
             } catch (Exception e) {
-            throw new RuntimeException("syntax error in definition line: " + currentLine, e);
+                throw new RuntimeException("syntax error in " + file + ", line: " + currentLine, e);
+            }
         }
         return hierarchy;
     }
 
     /** adds class methods/fields/ctors */
     private void addElements() {
+        for (String file : DEFINITION_FILES) {
             int currentLine = -1;
             try {
-            try (InputStream stream = Definition.class.getResourceAsStream(DEFINITION_FILE);
+                try (InputStream stream = Definition.class.getResourceAsStream(file);
                         LineNumberReader reader = new LineNumberReader(new InputStreamReader(stream, StandardCharsets.UTF_8))) {
                     String line = null;
                     String currentClass = null;
@@ -526,12 +534,13 @@ public final class Definition {
                     }
                 }
             } catch (Exception e) {
-            throw new RuntimeException("syntax error in definition line: " + currentLine, e);
+                throw new RuntimeException("syntax error in " + file + ", line: " + currentLine, e);
+            }
         }
     }
 
     private final void addStruct(final String name, final Class<?> clazz) {
-        if (!name.matches("^[_a-zA-Z][<>,_a-zA-Z0-9]*$")) {
+        if (!name.matches("^[_a-zA-Z][\\.,_a-zA-Z0-9]*$")) {
             throw new IllegalArgumentException("Invalid struct name [" + name + "].");
         }
 
@@ -591,7 +600,7 @@ public final class Definition {
         }
 
         final org.objectweb.asm.commons.Method asm = org.objectweb.asm.commons.Method.getMethod(reflect);
-        final Constructor constructor = new Constructor(name, owner, Arrays.asList(args), asm, reflect);
+        final Constructor constructor = new Constructor(name, owner, Arrays.asList(args), asm);
 
         owner.constructors.put(methodKey, constructor);
     }
@@ -713,8 +722,8 @@ public final class Definition {
                 " with arguments " + Arrays.toString(classes) + ".");
         }
 
-        final Method method = new Method(name, owner, rtn, Arrays.asList(args), asm, reflect, handle);
         final int modifiers = reflect.getModifiers();
+        final Method method = new Method(name, owner, rtn, Arrays.asList(args), asm, modifiers, handle);
 
         if (java.lang.reflect.Modifier.isStatic(modifiers)) {
             owner.staticMethods.put(methodKey, method);
@@ -767,7 +776,7 @@ public final class Definition {
                 " not found for class [" + owner.clazz.getName() + "].");
         }
 
-        final Field field = new Field(name, owner, type, reflect, getter, setter);
+        final Field field = new Field(name, reflect.getName(), owner, type, modifiers, getter, setter);
 
         if (isStatic) {
             // require that all static fields are static final
@@ -782,7 +791,7 @@ public final class Definition {
         }
     }
 
-    private final void copyStruct(final String struct, List<String> children) {
+    private void copyStruct(String struct, List<String> children) {
         final Struct owner = structsMap.get(struct);
 
         if (owner == null) {
@@ -792,7 +801,7 @@ public final class Definition {
         for (int count = 0; count < children.size(); ++count) {
             final Struct child = structsMap.get(children.get(count));
 
-            if (struct == null) {
+            if (child == null) {
                 throw new IllegalArgumentException("Child struct [" + children.get(count) + "]" +
                     " not defined for copy to owner struct [" + owner.name + "].");
             }
@@ -802,62 +811,19 @@ public final class Definition {
                     " is not a super type of owner struct [" + owner.name + "] in copy.");
             }
 
-            final boolean object = child.clazz.equals(Object.class) &&
-                java.lang.reflect.Modifier.isInterface(owner.clazz.getModifiers());
-
             for (Map.Entry<MethodKey,Method> kvPair : child.methods.entrySet()) {
                 MethodKey methodKey = kvPair.getKey();
                 Method method = kvPair.getValue();
                 if (owner.methods.get(methodKey) == null) {
-                    final Class<?> clazz = object ? Object.class : owner.clazz;
-
-                    java.lang.reflect.Method reflect;
-                    MethodHandle handle;
-
-                    try {
-                        reflect = clazz.getMethod(method.method.getName(), method.reflect.getParameterTypes());
-                    } catch (final NoSuchMethodException exception) {
-                        throw new IllegalArgumentException("Method [" + method.method.getName() + "] not found for" +
-                            " class [" + owner.clazz.getName() + "] with arguments " +
-                            Arrays.toString(method.reflect.getParameterTypes()) + ".");
-                    }
-
-                    try {
-                        handle = MethodHandles.publicLookup().in(owner.clazz).unreflect(reflect);
-                    } catch (final IllegalAccessException exception) {
-                        throw new IllegalArgumentException("Method [" + method.method.getName() + "] not found for" +
-                            " class [" + owner.clazz.getName() + "] with arguments " +
-                            Arrays.toString(method.reflect.getParameterTypes()) + ".");
-                    }
-
                     owner.methods.put(methodKey,
-                        new Method(method.name, owner, method.rtn, method.arguments, method.method, reflect, handle));
+                        new Method(method.name, owner, method.rtn, method.arguments, method.method, method.modifiers, method.handle));
                 }
             }
 
-            for (final Field field : child.members.values()) {
+            for (Field field : child.members.values()) {
                 if (owner.members.get(field.name) == null) {
-                    java.lang.reflect.Field reflect;
-                    MethodHandle getter;
-                    MethodHandle setter;
-
-                    try {
-                        reflect = owner.clazz.getField(field.reflect.getName());
-                    } catch (final NoSuchFieldException exception) {
-                        throw new IllegalArgumentException("Field [" + field.reflect.getName() + "]" +
-                            " not found for class [" + owner.clazz.getName() + "].");
-                    }
-
-                    try {
-                        getter = MethodHandles.publicLookup().unreflectGetter(reflect);
-                        setter = MethodHandles.publicLookup().unreflectSetter(reflect);
-                    } catch (final IllegalAccessException exception) {
-                        throw new IllegalArgumentException("Getter/Setter [" + field.name + "]" +
-                            " not found for class [" + owner.clazz.getName() + "].");
-                    }
-
                     owner.members.put(field.name,
-                        new Field(field.name, owner, field.type, reflect, getter, setter));
+                        new Field(field.name, field.javaName, owner, field.type, field.modifiers, field.getter, field.setter));
                 }
             }
         }

modules/lang-painless/src/main/java/org/elasticsearch/painless/node/LCall.java

@@ -95,7 +95,7 @@ public final class LCall extends ALink {
             argument.write(writer);
         }
 
-        if (java.lang.reflect.Modifier.isStatic(method.reflect.getModifiers())) {
+        if (java.lang.reflect.Modifier.isStatic(method.modifiers)) {
             writer.invokeStatic(method.owner.type, method.method);
         } else if (java.lang.reflect.Modifier.isInterface(method.owner.clazz.getModifiers())) {
             writer.invokeInterface(method.owner.type, method.method);

modules/lang-painless/src/main/java/org/elasticsearch/painless/node/LField.java

@@ -62,7 +62,7 @@ public final class LField extends ALink {
         field = statik ? struct.staticMembers.get(value) : struct.members.get(value);
 
         if (field != null) {
-            if (store && java.lang.reflect.Modifier.isFinal(field.reflect.getModifiers())) {
+            if (store && java.lang.reflect.Modifier.isFinal(field.modifiers)) {
                 throw new IllegalArgumentException(error(
                     "Cannot write to read-only field [" + value + "] for type [" + struct.name + "]."));
             }
@@ -105,19 +105,19 @@ public final class LField extends ALink {
 
     @Override
     void load(MethodWriter writer) {
-        if (java.lang.reflect.Modifier.isStatic(field.reflect.getModifiers())) {
-            writer.getStatic(field.owner.type, field.reflect.getName(), field.type.type);
+        if (java.lang.reflect.Modifier.isStatic(field.modifiers)) {
+            writer.getStatic(field.owner.type, field.javaName, field.type.type);
         } else {
-            writer.getField(field.owner.type, field.reflect.getName(), field.type.type);
+            writer.getField(field.owner.type, field.javaName, field.type.type);
         }
     }
 
     @Override
     void store(MethodWriter writer) {
-        if (java.lang.reflect.Modifier.isStatic(field.reflect.getModifiers())) {
-            writer.putStatic(field.owner.type, field.reflect.getName(), field.type.type);
+        if (java.lang.reflect.Modifier.isStatic(field.modifiers)) {
+            writer.putStatic(field.owner.type, field.javaName, field.type.type);
         } else {
-            writer.putField(field.owner.type, field.reflect.getName(), field.type.type);
+            writer.putField(field.owner.type, field.javaName, field.type.type);
         }
     }
 }

modules/lang-painless/src/main/resources/org/elasticsearch/painless/definition.txt

@@ -1,375 +0,0 @@
-#
-# Licensed to Elasticsearch under one or more contributor
-# license agreements. See the NOTICE file distributed with
-# this work for additional information regarding copyright
-# ownership. Elasticsearch licenses this file to you under
-# the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
-#
-
-#
-# Painless definition file. This defines the hierarchy of classes,
-# what methods and fields they have, etc.
-#
-
-# primitive types
-
-class void -> void {
-}
-
-class boolean -> boolean {
-}
-
-class byte -> byte {
-}
-
-class short -> short {
-}
-
-class char -> char {
-}
-
-class int -> int {
-}
-
-class long -> long {
-}
-
-class float -> float {
-}
-
-class double -> double {
-}
-
-# basic JDK classes
-
-class Object -> java.lang.Object {
-  boolean equals(Object)
-  int hashCode()
-  String toString()
-}
-
-class def -> java.lang.Object {
-  boolean equals(Object)
-  int hashCode()
-  String toString()
-}
-
-class Void -> java.lang.Void extends Object {
-}
-
-class Boolean -> java.lang.Boolean extends Object {
-  Boolean TRUE
-  Boolean FALSE
-  int compare(boolean,boolean)
-  boolean parseBoolean(String)
-  Boolean valueOf(boolean)
-  boolean booleanValue()
-  int compareTo(Boolean)
-} 
-
-class Byte -> java.lang.Byte extends Number,Object {
-  byte MIN_VALUE
-  byte MAX_VALUE
-  int compare(byte,byte)
-  int compareTo(Byte)
-  byte parseByte(String)
-  Byte valueOf(byte)
-}
-
-class Short -> java.lang.Short extends Number,Object {
-  short MIN_VALUE
-  short MAX_VALUE
-  int compare(short,short)
-  int compareTo(Short)
-  short parseShort(String)
-  Short valueOf(short)
-}
-
-class Character -> java.lang.Character extends Object {
-  char MIN_VALUE
-  char MAX_VALUE
-  int charCount(int)
-  char charValue()
-  int compare(char,char)
-  int compareTo(Character)
-  int digit(int,int)
-  char forDigit(int,int)
-  String getName(int)
-  int getNumericValue(int)
-  boolean isAlphabetic(int)
-  boolean isDefined(int)
-  boolean isDigit(int)
-  boolean isIdeographic(int)
-  boolean isLetter(int)
-  boolean isLetterOrDigit(int)
-  boolean isLowerCase(int)
-  boolean isMirrored(int)
-  boolean isSpaceChar(int)
-  boolean isTitleCase(int)
-  boolean isUpperCase(int)
-  boolean isWhitespace(int)
-  Character valueOf(char)
-}
-
-class Integer -> java.lang.Integer extends Number,Object {
-  int MIN_VALUE
-  int MAX_VALUE
-  int compare(int,int)
-  int compareTo(Integer)
-  int min(int,int)
-  int max(int,int)
-  int parseInt(String)
-  int signum(int)
-  String toHexString(int)
-  Integer valueOf(int)
-}
-
-class Long -> java.lang.Long extends Number,Object {
-  long MIN_VALUE
-  long MAX_VALUE
-  int compare(long,long)
-  int compareTo(Long)
-  long min(long,long)
-  long max(long,long)
-  long parseLong(String)
-  int signum(long)
-  String toHexString(long)
-  Long valueOf(long)
-}
-
-class Float -> java.lang.Float extends Number,Object {
-  float MIN_VALUE
-  float MAX_VALUE
-  int compare(float,float)
-  int compareTo(Float)
-  float min(float,float)
-  float max(float,float)
-  float parseFloat(String)
-  String toHexString(float)
-  Float valueOf(float)
-}
-
-class Double -> java.lang.Double extends Number,Object {
-  double MIN_VALUE
-  double MAX_VALUE
-  int compare(double,double)
-  int compareTo(Double)
-  double min(double,double)
-  double max(double,double)
-  double parseDouble(String)
-  String toHexString(double)
-  Double valueOf(double)
-}
-
-class Number -> java.lang.Number extends Object {
-  byte byteValue()
-  short shortValue()
-  int intValue()
-  long longValue()
-  float floatValue()
-  double doubleValue()
-}
-
-class CharSequence -> java.lang.CharSequence extends Object {
-  char charAt(int)
-  int length()
-}
-
-class String -> java.lang.String extends CharSequence,Object {
-  String <init>()
-  int codePointAt(int)
-  int compareTo(String)
-  String concat(String)
-  boolean endsWith(String)
-  int indexOf(String)
-  int indexOf(String,int)
-  boolean isEmpty()
-  String replace(CharSequence,CharSequence)
-  boolean startsWith(String)
-  String substring(int,int)
-  char[] toCharArray()
-  String trim()
-}
-
-class Math -> java.lang.Math {
-  double E
-  double PI
-  double abs(double)
-  double acos(double)
-  double asin(double)
-  double atan(double)
-  double atan2(double,double)
-  double cbrt(double)
-  double ceil(double)
-  double cos(double)
-  double cosh(double)
-  double exp(double)
-  double expm1(double)
-  double floor(double)
-  double hypot(double,double)
-  double log(double)
-  double log10(double)
-  double log1p(double)
-  double max(double,double)
-  double min(double,double)
-  double pow(double,double)
-  double random()
-  double rint(double)
-  long round(double)
-  double sin(double)
-  double sinh(double)
-  double sqrt(double)
-  double tan(double)
-  double tanh(double)
-  double toDegrees(double)
-  double toRadians(double)
-}
-
-class Iterator -> java.util.Iterator extends Object {
-  boolean hasNext()
-  def next()
-  void remove()
-}
-
-class Collection -> java.util.Collection extends Object {
-  boolean add(def)
-  void clear()
-  boolean contains(def)
-  boolean isEmpty()
-  Iterator iterator()
-  boolean remove(def)
-  int size()
-}
-
-class List -> java.util.List extends Collection,Object {
-  def set(int,def)
-  def get(int)
-  def remove(int)
-  int getLength/size()
-}
-
-class ArrayList -> java.util.ArrayList extends List,Collection,Object {
-  ArrayList <init>()
-}
-
-class Set -> java.util.Set extends Collection,Object {
-}
-
-class HashSet -> java.util.HashSet extends Set,Collection,Object {
-  HashSet <init>()
-}
-
-class Map -> java.util.Map extends Object {
-  def put(def,def)
-  def get(def)
-  def remove(def)
-  boolean isEmpty()
-  int size()
-  boolean containsKey(def)
-  Set keySet()
-  Collection values()
-}
-
-class HashMap -> java.util.HashMap extends Map,Object {
-  HashMap <init>()
-}
-
-class Exception -> java.lang.Exception extends Object {
-  String getMessage()
-}
-
-class ArithmeticException -> java.lang.ArithmeticException extends Exception,Object {
-  ArithmeticException <init>()
-}
-
-class IllegalArgumentException -> java.lang.IllegalArgumentException extends Exception,Object {
-  IllegalArgumentException <init>()
-}
-
-class IllegalStateException -> java.lang.IllegalStateException extends Exception,Object {
-  IllegalStateException <init>()
-}
-
-class NumberFormatException -> java.lang.NumberFormatException extends Exception,Object {
-  NumberFormatException <init>()
-}
-
-# ES Scripting API
-
-class GeoPoint -> org.elasticsearch.common.geo.GeoPoint extends Object {
-  double getLat()
-  double getLon()
-}
-
-class Strings -> org.elasticsearch.index.fielddata.ScriptDocValues$Strings extends List,Collection,Object {
-  String getValue()
-  List getValues()
-}
-
-class Longs -> org.elasticsearch.index.fielddata.ScriptDocValues$Longs extends List,Collection,Object {
-  long getValue()
-  List getValues()
-}
-
-class Doubles -> org.elasticsearch.index.fielddata.ScriptDocValues$Doubles extends List,Collection,Object {
-  double getValue()
-  List getValues()
-}
-
-class GeoPoints -> org.elasticsearch.index.fielddata.ScriptDocValues$GeoPoints extends List,Collection,Object {
-  GeoPoint getValue()
-  List getValues()
-  double getLat()
-  double getLon()
-  double[] getLats()
-  double[] getLons()
-
-  # geo distance functions... so many...
-  double factorDistance(double,double)
-  double factorDistanceWithDefault(double,double,double)
-  double factorDistance02(double,double)
-  double factorDistance13(double,double)
-  double arcDistance(double,double)
-  double arcDistanceWithDefault(double,double,double)
-  double arcDistanceInKm(double,double)
-  double arcDistanceInKmWithDefault(double,double,double)
-  double arcDistanceInMiles(double,double)
-  double arcDistanceInMilesWithDefault(double,double,double)
-  double distance(double,double)
-  double distanceWithDefault(double,double,double)
-  double distanceInKm(double,double)
-  double distanceInKmWithDefault(double,double,double)
-  double distanceInMiles(double,double)
-  double distanceInMilesWithDefault(double,double,double)
-  double geohashDistance(String)
-  double geohashDistanceInKm(String)
-  double geohashDistanceInMiles(String)
-}
-
-# for testing.
-# currently FeatureTest exposes overloaded constructor, field load store, and overloaded static methods
-class FeatureTest -> org.elasticsearch.painless.FeatureTest extends Object {
-  FeatureTest <init>()
-  FeatureTest <init>(int,int)
-  int getX()
-  int getY()
-  void setX(int)
-  void setY(int)
-  boolean overloadedStatic()
-  boolean overloadedStatic(boolean)
-}
-
-# currently needed internally
-class Executable -> org.elasticsearch.painless.Executable {
-}

modules/lang-painless/src/main/resources/org/elasticsearch/painless/java.math.txt

@@ -0,0 +1,149 @@
+#
+# Licensed to Elasticsearch under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+#
+# Painless definition file. This defines the hierarchy of classes,
+# what methods and fields they have, etc.
+#
+
+#### Classes
+
+class BigDecimal -> java.math.BigDecimal extends Number,Comparable,Object {
+  BigDecimal ONE
+  BigDecimal TEN
+  BigDecimal ZERO
+  BigDecimal <init>(String)
+  BigDecimal <init>(String,MathContext)
+  BigDecimal abs()
+  BigDecimal abs(MathContext)
+  BigDecimal add(BigDecimal)
+  BigDecimal add(BigDecimal,MathContext)
+  byte byteValueExact()
+  BigDecimal divide(BigDecimal)
+  BigDecimal divide(BigDecimal,MathContext)
+  BigDecimal[] divideAndRemainder(BigDecimal)
+  BigDecimal[] divideAndRemainder(BigDecimal,MathContext)
+  BigDecimal divideToIntegralValue(BigDecimal)
+  BigDecimal divideToIntegralValue(BigDecimal,MathContext)
+  int intValueExact()
+  long longValueExact()
+  BigDecimal max(BigDecimal)
+  BigDecimal min(BigDecimal)
+  BigDecimal movePointLeft(int)
+  BigDecimal movePointRight(int)
+  BigDecimal multiply(BigDecimal)
+  BigDecimal multiply(BigDecimal,MathContext)
+  BigDecimal negate()
+  BigDecimal negate(MathContext)
+  BigDecimal plus()
+  BigDecimal plus(MathContext)
+  BigDecimal pow(int)
+  BigDecimal pow(int,MathContext)
+  int precision()
+  BigDecimal remainder(BigDecimal)
+  BigDecimal remainder(BigDecimal,MathContext)
+  BigDecimal round(MathContext)
+  int scale()
+  BigDecimal scaleByPowerOfTen(int)
+  BigDecimal setScale(int)
+  BigDecimal setScale(int,RoundingMode)
+  short shortValueExact()
+  int signum()
+  BigDecimal stripTrailingZeros()
+  BigDecimal subtract(BigDecimal)
+  BigDecimal subtract(BigDecimal,MathContext)
+  BigInteger toBigInteger()
+  BigInteger toBigIntegerExact()
+  String toEngineeringString()
+  String toPlainString()
+  BigDecimal ulp()
+  BigDecimal valueOf(double)
+}
+
+class BigInteger -> java.math.BigInteger extends Number,Comparable,Object {
+  BigInteger ONE
+  BigInteger TEN
+  BigInteger ZERO
+  BigInteger <init>(String)
+  BigInteger <init>(String,int)
+  BigInteger abs()
+  BigInteger add(BigInteger)
+  BigInteger and(BigInteger)
+  BigInteger andNot(BigInteger)
+  int bitCount()
+  int bitLength()
+  byte byteValueExact()
+  BigInteger clearBit(int)
+  BigInteger divide(BigInteger)
+  BigInteger[] divideAndRemainder(BigInteger)
+  BigInteger flipBit(int)
+  BigInteger gcd(BigInteger)
+  int getLowestSetBit()
+  int intValueExact()
+  long longValueExact()
+  BigInteger max(BigInteger)
+  BigInteger min(BigInteger)
+  BigInteger mod(BigInteger)
+  BigInteger modInverse(BigInteger)
+  BigInteger modPow(BigInteger,BigInteger)
+  BigInteger multiply(BigInteger)
+  BigInteger negate()
+  BigInteger not()
+  BigInteger or(BigInteger)
+  BigInteger pow(int)
+  BigInteger remainder(BigInteger)
+  BigInteger setBit(int)
+  BigInteger shiftLeft(int)
+  BigInteger shiftRight(int)
+  short shortValueExact()
+  int signum()
+  BigInteger subtract(BigInteger)
+  boolean testBit(int)
+  byte[] toByteArray()
+  String toString(int)
+  BigInteger valueOf(long)
+  BigInteger xor(BigInteger)
+}
+
+class MathContext -> java.math.MathContext extends Object {
+  MathContext DECIMAL128
+  MathContext DECIMAL32
+  MathContext DECIMAL64
+  MathContext UNLIMITED
+  MathContext <init>(int)
+  MathContext <init>(int,RoundingMode)
+  int getPrecision()
+  RoundingMode getRoundingMode()
+}
+
+#### Enums
+
+class RoundingMode -> java.math.RoundingMode extends Enum,Object {
+  RoundingMode CEILING
+  RoundingMode DOWN
+  RoundingMode FLOOR
+  RoundingMode HALF_DOWN
+  RoundingMode HALF_EVEN
+  RoundingMode HALF_UP
+  RoundingMode UNNECESSARY
+  RoundingMode UP
+  RoundingMode valueOf(String)
+  RoundingMode[] values()
+}
+

modules/lang-painless/src/main/resources/org/elasticsearch/painless/java.text.txt

@@ -0,0 +1,486 @@
+#
+# Licensed to Elasticsearch under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+#
+# Painless definition file. This defines the hierarchy of classes,
+# what methods and fields they have, etc.
+#
+
+#### Interfaces
+
+class AttributedCharacterIterator -> java.text.AttributedCharacterIterator extends CharacterIterator {
+  Set getAllAttributeKeys()
+  def getAttribute(AttributedCharacterIterator.Attribute)
+  Map getAttributes()
+  int getRunLimit()
+  int getRunLimit(Set)
+  int getRunStart()
+  int getRunStart(Set)
+}
+
+class CharacterIterator -> java.text.CharacterIterator {
+  char DONE
+  def clone()
+  char current()
+  char first()
+  int getBeginIndex()
+  int getEndIndex()
+  int getIndex()
+  char last()
+  char next()
+  char previous()
+  char setIndex(int)
+}
+
+#### Classes
+
+class Annotation -> java.text.Annotation extends Object {
+  Annotation <init>(Object)
+  def getValue()
+}
+
+class AttributedCharacterIterator.Attribute -> java.text.AttributedCharacterIterator$Attribute extends Object {
+  AttributedCharacterIterator.Attribute INPUT_METHOD_SEGMENT
+  AttributedCharacterIterator.Attribute LANGUAGE
+  AttributedCharacterIterator.Attribute READING
+}
+
+class AttributedString -> java.text.AttributedString extends Object {
+  AttributedString <init>(String)
+  AttributedString <init>(String,Map)
+  void addAttribute(AttributedCharacterIterator.Attribute,Object)
+  void addAttribute(AttributedCharacterIterator.Attribute,Object,int,int)
+  void addAttributes(Map,int,int)
+  AttributedCharacterIterator getIterator()
+  AttributedCharacterIterator getIterator(AttributedCharacterIterator.Attribute[])
+  AttributedCharacterIterator getIterator(AttributedCharacterIterator.Attribute[],int,int)
+}
+
+class Bidi -> java.text.Bidi extends Object {
+  int DIRECTION_DEFAULT_LEFT_TO_RIGHT
+  int DIRECTION_DEFAULT_RIGHT_TO_LEFT
+  int DIRECTION_LEFT_TO_RIGHT
+  int DIRECTION_RIGHT_TO_LEFT
+  Bidi <init>(AttributedCharacterIterator)
+  Bidi <init>(char[],int,byte[],int,int,int)
+  Bidi <init>(String,int)
+  boolean baseIsLeftToRight()
+  Bidi createLineBidi(int,int)
+  int getBaseLevel()
+  int getLength()
+  int getLevelAt(int)
+  int getRunCount()
+  int getRunLevel(int)
+  int getRunLimit(int)
+  int getRunStart(int)
+  boolean isLeftToRight()
+  boolean isMixed()
+  boolean isRightToLeft()
+  void reorderVisually(byte[],int,Object[],int,int)
+  boolean requiresBidi(char[],int,int)
+}
+
+class BreakIterator -> java.text.BreakIterator extend Object {
+  int DONE
+  def clone()
+  int current()
+  int first()
+  int following(int)
+  Locale[] getAvailableLocales()
+  BreakIterator getCharacterInstance()
+  BreakIterator getCharacterInstance(Locale)
+  BreakIterator getLineInstance()
+  BreakIterator getLineInstance(Locale)
+  BreakIterator getSentenceInstance()
+  BreakIterator getSentenceInstance(Locale)
+  CharacterIterator getText()
+  BreakIterator getWordInstance()
+  BreakIterator getWordInstance(Locale)
+  boolean isBoundary(int)
+  int last()
+  int next()
+  int next(int)
+  int preceding(int)
+  int previous()
+  void setText(String)
+}
+
+class ChoiceFormat -> java.text.ChoiceFormat extends NumberFormat,Format,Object {
+  ChoiceFormat <init>(double[],String[])
+  ChoiceFormat <init>(String)
+  void applyPattern(String)
+  def[] getFormats()
+  double[] getLimits()
+  double nextDouble(double)
+  double nextDouble(double,boolean)
+  double previousDouble(double)
+  void setChoices(double[],String[])
+  String toPattern()
+}
+
+class CollationElementIterator -> java.text.CollationElementIterator extends Object {
+  int NULLORDER
+  int getMaxExpansion(int)
+  int getOffset()
+  int next()
+  int previous()
+  int primaryOrder(int)
+  void reset()
+  short secondaryOrder(int)
+  void setOffset(int)
+  void setText(String)
+  short tertiaryOrder(int)
+}
+
+class CollationKey -> java.text.CollationKey extends Comparable,Object {
+  String getSourceString()
+  byte[] toByteArray()
+}
+
+class Collator -> java.text.Collator extends Comparator,Object {
+  int CANONICAL_DECOMPOSITION
+  int FULL_DECOMPOSITION
+  int IDENTICAL
+  int NO_DECOMPOSITION
+  int PRIMARY
+  int SECONDARY
+  int TERTIARY
+  def clone()
+  boolean equals(String,String)
+  Locale[] getAvailableLocales()
+  CollationKey getCollationKey(String)
+  int getDecomposition()
+  Collator getInstance()
+  Collator getInstance(Locale)
+  int getStrength()
+  void setDecomposition(int)
+  void setStrength(int)
+}
+
+class DateFormat -> java.text.DateFormat extends Format,Object {
+  int AM_PM_FIELD
+  int DATE_FIELD
+  int DAY_OF_WEEK_FIELD
+  int DAY_OF_WEEK_IN_MONTH_FIELD
+  int DAY_OF_YEAR_FIELD
+  int DEFAULT
+  int ERA_FIELD
+  int FULL
+  int HOUR_OF_DAY0_FIELD
+  int HOUR_OF_DAY1_FIELD
+  int HOUR0_FIELD
+  int HOUR1_FIELD
+  int LONG
+  int MEDIUM
+  int MILLISECOND_FIELD
+  int MINUTE_FIELD
+  int MONTH_FIELD
+  int SECOND_FIELD
+  int SHORT
+  int TIMEZONE_FIELD
+  int WEEK_OF_MONTH_FIELD
+  int WEEK_OF_YEAR_FIELD
+  int YEAR_FIELD
+  Locale[] getAvailableLocales()
+  Calendar getCalendar()
+  DateFormat getDateInstance()
+  DateFormat getDateInstance(int)
+  DateFormat getDateInstance(int,Locale)
+  DateFormat getDateTimeInstance()
+  DateFormat getDateTimeInstance(int,int)
+  DateFormat getDateTimeInstance(int,int,Locale)
+  DateFormat getInstance()
+  NumberFormat getNumberFormat()
+  DateFormat getTimeInstance()
+  DateFormat getTimeInstance(int)
+  DateFormat getTimeInstance(int,Locale)
+  TimeZone getTimeZone()
+  boolean isLenient()
+  Date parse(String)
+  Date parse(String,ParsePosition)
+  void setCalendar(Calendar)
+  void setLenient(boolean)
+  void setNumberFormat(NumberFormat)
+  void setTimeZone(TimeZone)
+}
+
+class DateFormat.Field -> java.text.DateFormat$Field extends Format.Field,AttributedCharacterIterator.Attribute,Object {
+  DateFormat.Field AM_PM
+  DateFormat.Field DAY_OF_MONTH
+  DateFormat.Field DAY_OF_WEEK
+  DateFormat.Field DAY_OF_WEEK_IN_MONTH
+  DateFormat.Field DAY_OF_YEAR
+  DateFormat.Field ERA
+  DateFormat.Field HOUR_OF_DAY0
+  DateFormat.Field HOUR_OF_DAY1
+  DateFormat.Field HOUR0
+  DateFormat.Field HOUR1
+  DateFormat.Field MILLISECOND
+  DateFormat.Field MINUTE
+  DateFormat.Field MONTH
+  DateFormat.Field SECOND
+  DateFormat.Field TIME_ZONE
+  DateFormat.Field WEEK_OF_MONTH
+  DateFormat.Field WEEK_OF_YEAR
+  DateFormat.Field YEAR
+  int getCalendarField()
+  DateFormat.Field ofCalendarField(int)
+}
+
+class DateFormatSymbols -> java.text.DateFormatSymbols extends Object {
+  DateFormatSymbols <init>()
+  DateFormatSymbols <init>(Locale)
+  def clone()
+  String[] getAmPmStrings()
+  Locale[] getAvailableLocales()
+  String[] getEras()
+  DateFormatSymbols getInstance()
+  DateFormatSymbols getInstance(Locale)
+  String getLocalPatternChars()
+  String[] getMonths()
+  String[] getShortMonths()
+  String[] getShortWeekdays()
+  String[] getWeekdays()
+  String[][] getZoneStrings()
+  int hashCode()
+  void setAmPmStrings(String[])
+  void setEras(String[])
+  void setLocalPatternChars(String)
+  void setMonths(String[])
+  void setShortMonths(String[])
+  void setShortWeekdays(String[])
+  void setWeekdays(String[])
+  void setZoneStrings(String[][])
+}
+
+class DecimalFormat -> java.text.DecimalFormat extends NumberFormat,Format,Object {
+  DecimalFormat <init>()
+  DecimalFormat <init>(String)
+  DecimalFormat <init>(String,DecimalFormatSymbols)
+  void applyLocalizedPattern(String)
+  void applyPattern(String)
+  DecimalFormatSymbols getDecimalFormatSymbols()
+  int getGroupingSize()
+  int getMultiplier()
+  String getNegativePrefix()
+  String getNegativeSuffix()
+  String getPositivePrefix()
+  String getPositiveSuffix()
+  boolean isDecimalSeparatorAlwaysShown()
+  boolean isParseBigDecimal()
+  void setDecimalFormatSymbols(DecimalFormatSymbols)
+  void setDecimalSeparatorAlwaysShown(boolean)
+  void setGroupingSize(int)
+  void setMultiplier(int)
+  void setNegativePrefix(String)
+  void setNegativeSuffix(String)
+  void setPositivePrefix(String)
+  void setPositiveSuffix(String)
+  void setParseBigDecimal(boolean)
+  String toLocalizedPattern()
+  String toPattern()
+}
+
+class DecimalFormatSymbols -> java.text.DecimalFormatSymbols extends Object {
+  DecimalFormatSymbols <init>()
+  DecimalFormatSymbols <init>(Locale)
+  def clone()
+  Locale[] getAvailableLocales()
+  Currency getCurrency()
+  String getCurrencySymbol()
+  char getDecimalSeparator()
+  char getDigit()
+  String getExponentSeparator()
+  char getGroupingSeparator()
+  String getInfinity()
+  DecimalFormatSymbols getInstance()
+  DecimalFormatSymbols getInstance(Locale)
+  String getInternationalCurrencySymbol()
+  char getMinusSign()
+  char getMonetaryDecimalSeparator()
+  String getNaN()
+  char getPatternSeparator()
+  char getPercent()
+  char getPerMill()
+  char getZeroDigit()
+  void setCurrency(Currency)
+  void setCurrencySymbol(String)
+  void setDecimalSeparator(char)
+  void setDigit(char)
+  void setExponentSeparator(String)
+  void setGroupingSeparator(char)
+  void setInfinity(String)
+  void setInternationalCurrencySymbol(String)
+  void setMinusSign(char)
+  void setMonetaryDecimalSeparator(char)
+  void setNaN(String)
+  void setPatternSeparator(char)
+  void setPercent(char)
+  void setPerMill(char)
+  void setZeroDigit(char)
+}
+
+class FieldPosition -> java.text.FieldPosition extends Object {
+  FieldPosition <init>(int)
+  FieldPosition <init>(Format.Field,int)
+  int getBeginIndex()
+  int getEndIndex()
+  int getField()
+  Format.Field getFieldAttribute()
+  void setBeginIndex(int)
+  void setEndIndex(int)
+}
+
+class Format -> java.text.Format extends Object {
+  def clone()
+  String format(Object)
+  StringBuffer format(Object,StringBuffer,FieldPosition)
+  AttributedCharacterIterator formatToCharacterIterator(Object)
+  Object parseObject(String)
+  Object parseObject(String,ParsePosition)
+}
+
+class Format.Field -> java.text.Format$Field extends AttributedCharacterIterator.Attribute,Object {
+}
+
+class MessageFormat -> java.text.MessageFormat extends Format,Object {
+  void applyPattern(String)
+  String format(String,Object[])
+  Format[] getFormats()
+  Format[] getFormatsByArgumentIndex()
+  Locale getLocale()
+  Object[] parse(String)
+  Object[] parse(String,ParsePosition)
+  void setFormat(int,Format)
+  void setFormatByArgumentIndex(int,Format)
+  void setFormats(Format[])
+  void setFormatsByArgumentIndex(Format[])
+  void setLocale(Locale)
+  String toPattern()
+}
+
+class MessageFormat.Field -> java.text.MessageFormat$Field extends Format.Field,AttributedCharacterIterator.Attribute,Object {
+  MessageFormat.Field ARGUMENT
+}
+
+class Normalizer -> java.text.Normalizer extends Object {
+  boolean isNormalized(CharSequence,Normalizer.Form)
+  String normalize(CharSequence,Normalizer.Form)
+}
+
+class NumberFormat -> java.text.NumberFormat extends Format,Object {
+  int FRACTION_FIELD
+  int INTEGER_FIELD
+  Locale[] getAvailableLocales()
+  Currency getCurrency()
+  NumberFormat getCurrencyInstance()
+  NumberFormat getCurrencyInstance(Locale)
+  NumberFormat getInstance()
+  NumberFormat getInstance(Locale)
+  NumberFormat getIntegerInstance()
+  NumberFormat getIntegerInstance(Locale)
+  int getMaximumFractionDigits()
+  int getMaximumIntegerDigits()
+  int getMinimumFractionDigits()
+  int getMinimumIntegerDigits()
+  NumberFormat getNumberInstance()
+  NumberFormat getNumberInstance(Locale)
+  NumberFormat getPercentInstance()
+  NumberFormat getPercentInstance(Locale)
+  RoundingMode getRoundingMode()
+  boolean isGroupingUsed()
+  boolean isParseIntegerOnly()
+  Number parse(String)
+  Number parse(String,ParsePosition)
+  void setCurrency(Currency)
+  void setGroupingUsed(boolean)
+  void setMaximumFractionDigits(int)
+  void setMaximumIntegerDigits(int)
+  void setMinimumFractionDigits(int)
+  void setMinimumIntegerDigits(int)
+  void setParseIntegerOnly(boolean)
+  void setRoundingMode(RoundingMode)
+}
+
+class NumberFormat.Field -> java.text.NumberFormat$Field extends Format.Field,AttributedCharacterIterator.Attribute,Object {
+  NumberFormat.Field CURRENCY
+  NumberFormat.Field DECIMAL_SEPARATOR
+  NumberFormat.Field EXPONENT
+  NumberFormat.Field EXPONENT_SIGN
+  NumberFormat.Field EXPONENT_SYMBOL
+  NumberFormat.Field FRACTION
+  NumberFormat.Field GROUPING_SEPARATOR
+  NumberFormat.Field INTEGER
+  NumberFormat.Field PERCENT
+  NumberFormat.Field PERMILLE
+  NumberFormat.Field SIGN
+}
+
+class ParsePosition -> java.text.ParsePosition extends Object {
+  ParsePosition <init>(int)
+  int getErrorIndex()
+  int getIndex()
+  void setErrorIndex(int)
+  void setIndex(int)
+}
+
+class RuleBasedCollator -> java.text.RuleBasedCollator extends Collator,Comparator,Object {
+  RuleBasedCollator <init>(String)
+  CollationElementIterator getCollationElementIterator(String)
+  String getRules()
+}
+
+class SimpleDateFormat -> java.text.SimpleDateFormat extends DateFormat,Format,Object {
+  SimpleDateFormat <init>()
+  SimpleDateFormat <init>(String)
+  SimpleDateFormat <init>(String,Locale)
+  void applyLocalizedPattern(String)
+  void applyPattern(String)
+  Date get2DigitYearStart()
+  DateFormatSymbols getDateFormatSymbols()
+  void setDateFormatSymbols(DateFormatSymbols)
+  void set2DigitYearStart(Date)
+  String toLocalizedPattern()
+  String toPattern()
+}
+
+class StringCharacterIterator -> java.text.StringCharacterIterator extends CharacterIterator,Object {
+  StringCharacterIterator <init>(String)
+  StringCharacterIterator <init>(String,int)
+  StringCharacterIterator <init>(String,int,int,int)
+  void setText(String)
+}
+
+#### Enums
+
+class Normalizer.Form -> java.text.Normalizer$Form extends Enum,Object {
+  Normalizer.Form NFC
+  Normalizer.Form NFD
+  Normalizer.Form NFKC
+  Normalizer.Form NFKD
+  Normalizer.Form valueOf(String)
+  Normalizer.Form[] values()
+}
+
+#### Exceptions
+
+class ParseException -> java.text.ParseException extends Exception,Object {
+  ParseException <init>(String,int)
+  int getErrorOffset()
+}

modules/lang-painless/src/main/resources/org/elasticsearch/painless/java.util.function.txt

@@ -0,0 +1,232 @@
+#
+# Licensed to Elasticsearch under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+#
+# Painless definition file. This defines the hierarchy of classes,
+# what methods and fields they have, etc.
+#
+
+#### Interfaces
+
+class BiConsumer -> java.util.function.BiConsumer {
+  void accept(def,def)
+  BiConsumer andThen(BiConsumer)
+}
+
+class BiFunction -> java.util.function.BiFunction {
+  BiFunction andThen(Function)
+  def apply(def,def)
+}
+
+class BinaryOperator -> java.util.function.BinaryOperator extends BiFunction {
+  BinaryOperator maxBy(Comparator)
+  BinaryOperator minBy(Comparator)
+}
+
+class BiPredicate -> java.util.function.BiPredicate {
+  BiPredicate and(BiPredicate)
+  BiPredicate negate()
+  BiPredicate or(BiPredicate)
+  boolean test(def,def)
+}
+
+class BooleanSupplier -> java.util.function.BooleanSupplier {
+  boolean getAsBoolean()
+}
+
+class Consumer -> java.util.function.Consumer {
+  void accept(def)
+  Consumer andThen(Consumer)
+}
+
+class DoubleBinaryOperator -> java.util.function.DoubleBinaryOperator {
+  double applyAsDouble(double,double)
+}
+
+class DoubleConsumer -> java.util.function.DoubleConsumer {
+  void accept(double)
+  DoubleConsumer andThen(DoubleConsumer)
+}
+
+class DoubleFunction -> java.util.function.DoubleFunction {
+  def apply(double)
+}
+
+class DoublePredicate -> java.util.function.DoublePredicate {
+  DoublePredicate and(DoublePredicate)
+  DoublePredicate negate()
+  DoublePredicate or(DoublePredicate)
+  boolean test(double)
+}
+
+class DoubleSupplier -> java.util.function.DoubleSupplier {
+  double getAsDouble()
+}
+
+class DoubleToIntFunction -> java.util.function.DoubleToIntFunction {
+  int applyAsInt(double)
+}
+
+class DoubleToLongFunction -> java.util.function.DoubleToLongFunction {
+  long applyAsLong(double)
+}
+
+class DoubleUnaryOperator -> java.util.function.DoubleUnaryOperator {
+  DoubleUnaryOperator andThen(DoubleUnaryOperator)
+  double applyAsDouble(double)
+  DoubleUnaryOperator compose(DoubleUnaryOperator)
+  DoubleUnaryOperator identity()
+}
+
+class Function -> java.util.function.Function {
+  Function andThen(Function)
+  def apply(def)
+  Function compose(Function)
+  Function identity()
+}
+
+class IntBinaryOperator -> java.util.function.IntBinaryOperator {
+  int applyAsInt(int,int)
+}
+
+class IntConsumer -> java.util.function.IntConsumer {
+  void accept(int)
+  IntConsumer andThen(IntConsumer)
+}
+
+class IntFunction -> java.util.function.IntFunction {
+  def apply(int)
+}
+
+class IntPredicate -> java.util.function.IntPredicate {
+  IntPredicate and(IntPredicate)
+  IntPredicate negate()
+  IntPredicate or(IntPredicate)
+  boolean test(int)
+}
+
+class IntSupplier -> java.util.function.IntSupplier {
+  int getAsInt()
+}
+
+class IntToDoubleFunction -> java.util.function.IntToDoubleFunction {
+  double applyAsDouble(int)
+}
+
+class IntToLongFunction -> java.util.function.IntToLongFunction {
+  long applyAsLong(int)
+}
+
+class IntUnaryOperator -> java.util.function.IntUnaryOperator {
+  IntUnaryOperator andThen(IntUnaryOperator)
+  int applyAsInt(int)
+  IntUnaryOperator compose(IntUnaryOperator)
+  IntUnaryOperator identity()
+}
+
+class LongBinaryOperator -> java.util.function.LongBinaryOperator {
+  long applyAsLong(long,long)
+}
+
+class LongConsumer -> java.util.function.LongConsumer {
+  void accept(long)
+  LongConsumer andThen(LongConsumer)
+}
+
+class LongFunction -> java.util.function.LongFunction {
+  def apply(long)
+}
+
+class LongPredicate -> java.util.function.LongPredicate {
+  LongPredicate and(LongPredicate)
+  LongPredicate negate()
+  LongPredicate or(LongPredicate)
+  boolean test(long)
+}
+
+class LongSupplier -> java.util.function.LongSupplier {
+  long getAsLong()
+}
+
+class LongToDoubleFunction -> java.util.function.LongToDoubleFunction {
+  double applyAsDouble(long)
+}
+
+class LongToIntFunction -> java.util.function.LongToIntFunction {
+  int applyAsInt(long)
+}
+
+class LongUnaryOperator -> java.util.function.LongUnaryOperator {
+  LongUnaryOperator andThen(LongUnaryOperator)
+  long applyAsLong(long)
+  LongUnaryOperator compose(LongUnaryOperator)
+  LongUnaryOperator identity()
+}
+
+class ObjDoubleConsumer -> java.util.function.ObjDoubleConsumer {
+  void accept(def,double)
+}
+
+class ObjIntConsumer -> java.util.function.ObjIntConsumer {
+  void accept(def,int)
+}
+
+class ObjLongConsumer -> java.util.function.ObjLongConsumer {
+  void accept(def,long)
+}
+
+class Predicate -> java.util.function.Predicate {
+  Predicate and(Predicate)
+  Predicate isEqual(def)
+  Predicate negate()
+  Predicate or(Predicate)
+  boolean test(def)
+}
+
+class Supplier -> java.util.function.Supplier {
+  def get()
+}
+
+class ToDoubleBiFunction -> java.util.function.ToDoubleBiFunction {
+  double applyAsDouble(def,def)
+}
+
+class ToDoubleFunction -> java.util.function.ToDoubleFunction {
+  double applyAsDouble(def)
+}
+
+class ToIntBiFunction -> java.util.function.ToIntBiFunction {
+  int applyAsInt(def,def)
+}
+
+class ToIntFunction -> java.util.function.ToIntFunction {
+  int applyAsInt(def)
+}
+
+class ToLongBiFunction -> java.util.function.ToLongBiFunction {
+  long applyAsLong(def,def)
+}
+
+class ToLongFunction -> java.util.function.ToLongFunction {
+  long applyAsLong(def)
+}
+
+class UnaryOperator -> java.util.function.UnaryOperator extends Function {
+  UnaryOperator identity()
+}

modules/lang-painless/src/main/resources/org/elasticsearch/painless/java.util.stream.txt

@@ -0,0 +1,273 @@
+#
+# Licensed to Elasticsearch under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+#
+# Painless definition file. This defines the hierarchy of classes,
+# what methods and fields they have, etc.
+#
+
+#### Interfaces
+
+class BaseStream -> java.util.stream.BaseStream {
+  void close()
+  boolean isParallel()
+  Iterator iterator()
+  BaseStream sequential()
+  Spliterator spliterator()
+  BaseStream unordered()
+}
+
+class Collector -> java.util.stream.Collector {
+  BiConsumer accumulator()
+  Set characteristics()
+  BinaryOperator combiner()
+  Function finisher()
+  Collector of(Supplier,BiConsumer,BinaryOperator,Function,Collector.Characteristics[])
+  Collector of(Supplier,BiConsumer,BinaryOperator,Collector.Characteristics[])
+  Supplier supplier()
+}
+
+class DoubleStream -> java.util.stream.DoubleStream extends BaseStream {
+  boolean allMatch(DoublePredicate)
+  boolean anyMatch(DoublePredicate)
+  OptionalDouble average()
+  Stream boxed()
+  DoubleStream.Builder builder()
+  def collect(Supplier,ObjDoubleConsumer,BiConsumer)
+  DoubleStream concat(DoubleStream,DoubleStream)
+  long count()
+  DoubleStream distinct()
+  DoubleStream empty()
+  DoubleStream filter(DoublePredicate)
+  OptionalDouble findAny()
+  OptionalDouble findFirst()
+  DoubleStream flatMap(DoubleFunction)
+  void forEach(DoubleConsumer)
+  void forEachOrdered(DoubleConsumer)
+  PrimitiveIterator.OfDouble iterator()
+  DoubleStream limit(long)
+  DoubleStream map(DoubleUnaryOperator)
+  IntStream mapToInt(DoubleToIntFunction)
+  LongStream mapToLong(DoubleToLongFunction)
+  Stream mapToObj(DoubleFunction)
+  OptionalDouble max()
+  OptionalDouble min()
+  boolean noneMatch(DoublePredicate)
+  DoubleStream of(double[])
+  DoubleStream peek(DoubleConsumer)
+  OptionalDouble reduce(DoubleBinaryOperator)
+  double reduce(double,DoubleBinaryOperator)
+  DoubleStream sequential()
+  DoubleStream skip(long)
+  DoubleStream sorted()
+  Spliterator.OfDouble spliterator()
+  double sum()
+  DoubleSummaryStatistics summaryStatistics()
+  double[] toArray()
+}
+
+class DoubleStream.Builder -> java.util.stream.DoubleStream$Builder extends DoubleConsumer {
+  DoubleStream.Builder add(double)
+  DoubleStream build()
+}
+
+class IntStream -> java.util.stream.IntStream extends BaseStream {
+  boolean allMatch(IntPredicate)
+  boolean anyMatch(IntPredicate)
+  DoubleStream asDoubleStream()
+  LongStream asLongStream()
+  OptionalDouble average()
+  Stream boxed()
+  IntStream.Builder builder()
+  def collect(Supplier,ObjIntConsumer,BiConsumer)
+  IntStream concat(IntStream,IntStream)
+  long count()
+  IntStream distinct()
+  IntStream empty()
+  IntStream filter(IntPredicate)
+  OptionalInt findAny()
+  OptionalInt findFirst()
+  IntStream flatMap(IntFunction)
+  void forEach(IntConsumer)
+  void forEachOrdered(IntConsumer)
+  PrimitiveIterator.OfInt iterator()
+  IntStream limit(long)
+  IntStream map(IntUnaryOperator)
+  DoubleStream mapToDouble(IntToDoubleFunction)
+  LongStream mapToLong(IntToLongFunction)
+  Stream mapToObj(IntFunction)
+  OptionalInt max()
+  OptionalInt min()
+  boolean noneMatch(IntPredicate)
+  IntStream of(int[])
+  IntStream peek(IntConsumer)
+  IntStream range(int,int)
+  IntStream rangeClosed(int,int)
+  OptionalInt reduce(IntBinaryOperator)
+  int reduce(int,IntBinaryOperator)
+  IntStream sequential()
+  IntStream skip(long)
+  IntStream sorted()
+  Spliterator.OfInt spliterator()
+  int sum()
+  IntSummaryStatistics summaryStatistics()
+  int[] toArray()
+}
+
+class IntStream.Builder -> java.util.stream.IntStream$Builder extends IntConsumer {
+  IntStream.Builder add(int)
+  IntStream build()
+}
+
+class LongStream -> java.util.stream.LongStream extends BaseStream {
+  boolean allMatch(LongPredicate)
+  boolean anyMatch(LongPredicate)
+  DoubleStream asDoubleStream()
+  OptionalDouble average()
+  Stream boxed()
+  LongStream.Builder builder()
+  def collect(Supplier,ObjLongConsumer,BiConsumer)
+  LongStream concat(LongStream,LongStream)
+  long count()
+  LongStream distinct()
+  LongStream empty()
+  LongStream filter(LongPredicate)
+  OptionalLong findAny()
+  OptionalLong findFirst()
+  LongStream flatMap(LongFunction)
+  void forEach(LongConsumer)
+  void forEachOrdered(LongConsumer)
+  PrimitiveIterator.OfLong iterator()
+  LongStream limit(long)
+  LongStream map(LongUnaryOperator)
+  DoubleStream mapToDouble(LongToDoubleFunction)
+  IntStream mapToInt(LongToIntFunction)
+  Stream mapToObj(LongFunction)
+  OptionalLong max()
+  OptionalLong min()
+  boolean noneMatch(LongPredicate)
+  LongStream of(long[])
+  LongStream peek(LongConsumer)
+  LongStream range(long,long)
+  LongStream rangeClosed(long,long)
+  OptionalLong reduce(LongBinaryOperator)
+  long reduce(long,LongBinaryOperator)
+  LongStream sequential()
+  LongStream skip(long)
+  LongStream sorted()
+  Spliterator.OfLong spliterator()
+  long sum()
+  LongSummaryStatistics summaryStatistics()
+  long[] toArray()
+}
+
+class LongStream.Builder -> java.util.stream.LongStream$Builder extends LongConsumer {
+  LongStream.Builder add(long)
+  LongStream build()
+}
+
+class Stream -> java.util.stream.Stream extends BaseStream {
+  boolean allMatch(Predicate)
+  boolean anyMatch(Predicate)
+  Stream.Builder builder()
+  def collect(Collector)
+  def collect(Supplier,BiConsumer,BiConsumer)
+  Stream concat(Stream,Stream)
+  long count()
+  Stream distinct()
+  Stream empty()
+  Stream filter(Predicate)
+  Optional findAny()
+  Optional findFirst()
+  Stream flatMap(Function)
+  DoubleStream flatMapToDouble(Function)
+  IntStream flatMapToInt(Function)
+  LongStream flatMapToLong(Function)
+  void forEach(Consumer)
+  void forEachOrdered(Consumer)
+  Stream limit(long)
+  Stream map(Function)
+  DoubleStream mapToDouble(ToDoubleFunction)
+  IntStream mapToInt(ToIntFunction)
+  LongStream mapToLong(ToLongFunction)
+  Optional max(Comparator)
+  Optional min(Comparator)
+  boolean noneMatch(Predicate)
+  Stream of(def[])
+  Stream peek(Consumer)
+  Optional reduce(BinaryOperator)
+  def reduce(def,BinaryOperator)
+  def reduce(def,BiFunction,BinaryOperator)
+  Stream skip(long)
+  Stream sorted()
+  Stream sorted(Comparator)
+  def[] toArray()
+  def[] toArray(IntFunction)
+}
+
+class Stream.Builder -> java.util.stream.Stream$Builder extends Consumer {
+  Stream.Builder add(def)
+  Stream build()
+}
+
+#### Classes
+
+class Collectors -> java.util.stream.Collectors extends Object {
+  Collector averagingDouble(ToDoubleFunction)
+  Collector averagingInt(ToIntFunction)
+  Collector averagingLong(ToLongFunction)
+  Collector collectingAndThen(Collector,Function)
+  Collector counting()
+  Collector groupingBy(Function)
+  Collector groupingBy(Function,Collector)
+  Collector groupingBy(Function,Supplier,Collector)
+  Collector joining()
+  Collector joining(CharSequence)
+  Collector joining(CharSequence,CharSequence,CharSequence)
+  Collector mapping(Function,Collector)
+  Collector maxBy(Comparator)
+  Collector minBy(Comparator)
+  Collector partitioningBy(Predicate)
+  Collector partitioningBy(Predicate,Collector)
+  Collector reducing(BinaryOperator)
+  Collector reducing(def,BinaryOperator)
+  Collector reducing(def,Function,BinaryOperator)
+  Collector summarizingDouble(ToDoubleFunction)
+  Collector summarizingInt(ToIntFunction)
+  Collector summarizingLong(ToLongFunction)
+  Collector summingDouble(ToDoubleFunction)
+  Collector summingInt(ToIntFunction)
+  Collector summingLong(ToLongFunction)
+  Collector toCollection(Supplier)
+  Collector toList()
+  Collector toMap(Function,Function)
+  Collector toMap(Function,Function,BinaryOperator)
+  Collector toMap(Function,Function,BinaryOperator,Supplier)
+  Collector toSet()
+}
+
+#### Enums
+
+class Collector.Characteristics -> java.util.stream.Collector$Characteristics extends Enum,Object {
+  Collector.Characteristics CONCURRENT
+  Collector.Characteristics IDENTITY_FINISH
+  Collector.Characteristics UNORDERED
+  Collector.Characteristics valueOf(String)
+  Collector.Characteristics[] values()
+}

modules/lang-painless/src/main/resources/org/elasticsearch/painless/org.elasticsearch.txt

@@ -0,0 +1,127 @@
+#
+# Licensed to Elasticsearch under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+#
+# Painless definition file. This defines the hierarchy of classes,
+# what methods and fields they have, etc.
+#
+
+#### Primitive types
+
+class void -> void {
+}
+
+class boolean -> boolean {
+}
+
+class byte -> byte {
+}
+
+class short -> short {
+}
+
+class char -> char {
+}
+
+class int -> int {
+}
+
+class long -> long {
+}
+
+class float -> float {
+}
+
+class double -> double {
+}
+
+class def -> java.lang.Object {
+  boolean equals(Object)
+  int hashCode()
+  String toString()
+}
+
+#### ES Scripting API
+
+class GeoPoint -> org.elasticsearch.common.geo.GeoPoint extends Object {
+  double getLat()
+  double getLon()
+}
+
+class Strings -> org.elasticsearch.index.fielddata.ScriptDocValues$Strings extends List,Collection,Iterable,Object {
+  String getValue()
+  List getValues()
+}
+
+class Longs -> org.elasticsearch.index.fielddata.ScriptDocValues$Longs extends List,Collection,Iterable,Object {
+  long getValue()
+  List getValues()
+}
+
+class Doubles -> org.elasticsearch.index.fielddata.ScriptDocValues$Doubles extends List,Collection,Iterable,Object {
+  double getValue()
+  List getValues()
+}
+
+class GeoPoints -> org.elasticsearch.index.fielddata.ScriptDocValues$GeoPoints extends List,Collection,Iterable,Object {
+  GeoPoint getValue()
+  List getValues()
+  double getLat()
+  double getLon()
+  double[] getLats()
+  double[] getLons()
+
+  # geo distance functions... so many...
+  double factorDistance(double,double)
+  double factorDistanceWithDefault(double,double,double)
+  double factorDistance02(double,double)
+  double factorDistance13(double,double)
+  double arcDistance(double,double)
+  double arcDistanceWithDefault(double,double,double)
+  double arcDistanceInKm(double,double)
+  double arcDistanceInKmWithDefault(double,double,double)
+  double arcDistanceInMiles(double,double)
+  double arcDistanceInMilesWithDefault(double,double,double)
+  double distance(double,double)
+  double distanceWithDefault(double,double,double)
+  double distanceInKm(double,double)
+  double distanceInKmWithDefault(double,double,double)
+  double distanceInMiles(double,double)
+  double distanceInMilesWithDefault(double,double,double)
+  double geohashDistance(String)
+  double geohashDistanceInKm(String)
+  double geohashDistanceInMiles(String)
+}
+
+# for testing.
+# currently FeatureTest exposes overloaded constructor, field load store, and overloaded static methods
+class FeatureTest -> org.elasticsearch.painless.FeatureTest extends Object {
+  FeatureTest <init>()
+  FeatureTest <init>(int,int)
+  int getX()
+  int getY()
+  void setX(int)
+  void setY(int)
+  boolean overloadedStatic()
+  boolean overloadedStatic(boolean)
+}
+
+# currently needed internally
+class Executable -> org.elasticsearch.painless.Executable {
+}

modules/lang-painless/src/test/java/org/elasticsearch/painless/BasicAPITests.java

@@ -19,6 +19,9 @@
 
 package org.elasticsearch.painless;
 
+import java.util.Arrays;
+import java.util.Collections;
+
 public class BasicAPITests extends ScriptTestCase {
 
     public void testListIterator() {
@@ -90,4 +93,8 @@ public class BasicAPITests extends ScriptTestCase {
         assertBytecodeExists("def x = 1F", "INVOKESTATIC java/lang/Float.valueOf (F)Ljava/lang/Float;");
         assertBytecodeExists("def x = 1D", "INVOKESTATIC java/lang/Double.valueOf (D)Ljava/lang/Double;");
     }
+    
+    void testStream() {
+        assertEquals(11, exec("params.list.stream().sum()", Collections.singletonMap("list", Arrays.asList(1,2,3,5))));
+    }
 }