HADOOP-6486. fix common classes to work with Avro 1.3 reflection. Contributed by cutting.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@921577 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -1,5 +1,4 @@
 Hadoop Change Log
-# Add directory level at the storage directory
 
 Trunk (unreleased changes)
 
@@ -188,6 +187,9 @@ Trunk (unreleased changes)
     HADOOP-6537 Declare more detailed exceptions in FileContext and 
     AbstractFileSystem (Suresh Srinivas via Sanjay Radia)
 
+    HADOOP-6486. fix common classes to work with Avro 1.3 reflection.
+    (cutting via tomwhite)
+
   OPTIMIZATIONS
 
     HADOOP-6467. Improve the performance on HarFileSystem.listStatus(..).

ivy/ivysettings.xml

@@ -19,17 +19,32 @@
   <property name="repo.maven.org" value="http://repo1.maven.org/maven2/" override="false"/>
 
   <property name="maven2.pattern" value="[organisation]/[module]/[revision]/[module]-[revision]"/>
+  <property name="repo.dir" value="${user.home}/.m2/repository"/>
   <property name="maven2.pattern.ext" value="${maven2.pattern}.[ext]"/>
       <!-- pull in the local repository -->
  <include url="${ivy.default.conf.dir}/ivyconf-local.xml"/> 
- <settings defaultResolver="default"/>
+
+ <property name="resolvers" value="default" override="false"/>
+ <settings defaultResolver="${resolvers}"/>
+
  <resolvers>
    <!--ibiblio resolvers-->
     <ibiblio name="maven2" root="${repo.maven.org}" m2compatible="true"/>
 
+    <filesystem name="fs" m2compatible="true" force="true">
+       <artifact pattern="${repo.dir}/[organisation]/[module]/[revision]/[module]-[revision].[ext]"/>
+       <ivy pattern="${repo.dir}/[organisation]/[module]/[revision]/[module]-[revision].pom"/>
+    </filesystem>
+
     <chain name="default" dual="true">
       <resolver ref="maven2"/>
     </chain>
+
+    <chain name="internal" dual="true">
+      <resolver ref="fs"/>
+      <resolver ref="maven2"/>
+    </chain>
+
   </resolvers>
 
 </ivysettings>

ivy/libraries.properties

@@ -17,7 +17,7 @@
 apacheant.version=1.7.1
 ant-task.version=2.0.10
 
-avro.version=1.2.0
+avro.version=1.3.0
 
 checkstyle.version=4.2
 
@@ -44,8 +44,6 @@ hsqldb.version=1.8.0.10
 
 ivy.version=2.1.0-rc1
 
-jackson.version=1.0.1
-
 jasper.version=5.5.12
 jsp.version=2.1
 jsp-api.version=5.5.12
@@ -65,8 +63,6 @@ mina-core.version=2.0.0-M5
 
 oro.version=2.0.8
 
-paranamer.version=1.5
-
 rats-lib.version=0.6
 
 servlet.version=4.0.6

src/java/org/apache/hadoop/fs/Path.java

@@ -20,6 +20,7 @@ package org.apache.hadoop.fs;
 
 import java.net.*;
 import java.io.*;
+import org.apache.avro.reflect.Stringable;
 
 import org.apache.hadoop.conf.Configuration;
 
@@ -27,6 +28,7 @@ import org.apache.hadoop.conf.Configuration;
  * Path strings use slash as the directory separator.  A path string is
  * absolute if it begins with a slash.
  */
+@Stringable
 public class Path implements Comparable {
 
   /** The directory separator, a slash. */

src/java/org/apache/hadoop/io/EnumSetWritable.java

@@ -23,23 +23,35 @@ import java.io.DataOutput;
 import java.io.IOException;
 import java.util.EnumSet;
 import java.util.Iterator;
+import java.util.Collection;
+import java.util.AbstractCollection;
 
 import org.apache.hadoop.conf.Configurable;
 import org.apache.hadoop.conf.Configuration;
 
 /** A Writable wrapper for EnumSet. */
-public class EnumSetWritable<E extends Enum<E>> implements Writable,
-    Configurable {
+public class EnumSetWritable<E extends Enum<E>> extends AbstractCollection<E>
+  implements Writable, Configurable  {
 
   private EnumSet<E> value;
 
-  private Class<E> elementType;
+  private transient Class<E> elementType;
 
-  private Configuration conf;
+  private transient Configuration conf;
   
   EnumSetWritable() {
   }
 
+  public Iterator<E> iterator() { return value.iterator(); }
+  public int size() { return value.size(); }
+  public boolean add(E e) {
+    if (value == null) {
+      value = EnumSet.of(e);
+      set(value, null);
+    }
+    return value.add(e);
+  }
+
   /**
    * Construct a new EnumSetWritable. If the <tt>value</tt> argument is null or
    * its size is zero, the <tt>elementType</tt> argument must not be null. If

src/java/org/apache/hadoop/io/Text.java

@@ -33,6 +33,8 @@ import java.text.CharacterIterator;
 import java.text.StringCharacterIterator;
 import java.util.Arrays;
 
+import org.apache.avro.reflect.Stringable;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
@@ -45,6 +47,7 @@ import org.apache.commons.logging.LogFactory;
  * byte array contains valid UTF8 code, calculating the length of an encoded
  * string.
  */
+@Stringable
 public class Text extends BinaryComparable
     implements WritableComparable<BinaryComparable> {
   private static final Log LOG= LogFactory.getLog(Text.class);

src/java/org/apache/hadoop/io/serializer/avro/AvroSerialization.java

@@ -24,6 +24,7 @@ import java.io.OutputStream;
 import java.util.Map;
 
 import org.apache.avro.Schema;
+import org.apache.avro.io.DecoderFactory;
 import org.apache.avro.io.BinaryDecoder;
 import org.apache.avro.io.BinaryEncoder;
 import org.apache.avro.io.DatumReader;
@@ -125,7 +126,7 @@ public abstract class AvroSerialization<T> extends SerializationBase<T> {
     @Override
     public void open(InputStream in) throws IOException {
       inStream = in;
-      decoder = new BinaryDecoder(in);
+      decoder = DecoderFactory.defaultFactory().createBinaryDecoder(in, null);
     }
 
   }

src/test/core/org/apache/hadoop/fs/TestPath.java

@@ -23,6 +23,7 @@ import java.net.URI;
 import java.net.URISyntaxException;
 
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.io.AvroTestUtil;
 
 import junit.framework.TestCase;
 
@@ -195,4 +196,10 @@ public class TestPath extends TestCase {
                  new Path("file").makeQualified(defaultUri, new Path(wd)));
  }
 
+  public void testAvroReflect() throws Exception {
+    AvroTestUtil.testReflect
+      (new Path("foo"),
+       "{\"type\":\"string\",\"java-class\":\"org.apache.hadoop.fs.Path\"}");
+  }
+
 }

src/test/core/org/apache/hadoop/io/AvroTestUtil.java

@@ -0,0 +1,58 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF 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.
+ */
+
+package org.apache.hadoop.io;
+
+import java.io.IOException;
+import java.io.ByteArrayOutputStream;
+import java.lang.reflect.Type;
+
+import org.apache.avro.Schema;
+import org.apache.avro.reflect.ReflectData;
+import org.apache.avro.reflect.ReflectDatumWriter;
+import org.apache.avro.reflect.ReflectDatumReader;
+import org.apache.avro.io.BinaryEncoder;
+import org.apache.avro.io.DecoderFactory;
+
+import static junit.framework.TestCase.assertEquals;
+
+public class AvroTestUtil {
+
+  public static void testReflect(Object value, String schema) throws Exception {
+    testReflect(value, value.getClass(), schema);
+  }
+
+  public static void testReflect(Object value, Type type, String schema)
+    throws Exception {
+
+    // check that schema matches expected
+    Schema s = ReflectData.get().getSchema(type);
+    assertEquals(Schema.parse(schema), s);
+
+    // check that value is serialized correctly
+    ReflectDatumWriter<Object> writer = new ReflectDatumWriter<Object>(s);
+    ByteArrayOutputStream out = new ByteArrayOutputStream();
+    writer.write(value, new BinaryEncoder(out));
+    ReflectDatumReader<Object> reader = new ReflectDatumReader<Object>(s);
+    Object after =
+      reader.read(null, DecoderFactory.defaultFactory().createBinaryDecoder(
+          out.toByteArray(), null));
+    assertEquals(value, after);
+  }
+
+}

src/test/core/org/apache/hadoop/io/TestEnumSetWritable.java

@@ -19,7 +19,16 @@
 package org.apache.hadoop.io;
 
 import java.io.IOException;
+import java.io.ByteArrayOutputStream;
 import java.util.EnumSet;
+import java.lang.reflect.Type;
+
+import org.apache.avro.Schema;
+import org.apache.avro.reflect.ReflectData;
+import org.apache.avro.reflect.ReflectDatumWriter;
+import org.apache.avro.reflect.ReflectDatumReader;
+import org.apache.avro.io.BinaryEncoder;
+import org.apache.avro.io.DecoderFactory;
 
 import junit.framework.TestCase;
 
@@ -100,4 +109,14 @@ public class TestEnumSetWritable extends TestCase {
         .readObject(in, null)).get();
     assertEquals(read, null);
   }
+
+  public EnumSetWritable<TestEnumSet> testField;
+
+  public void testAvroReflect() throws Exception {
+    String schema = "{\"type\":\"array\",\"items\":{\"type\":\"enum\",\"name\":\"TestEnumSet\",\"namespace\":\"org.apache.hadoop.io.TestEnumSetWritable$\",\"symbols\":[\"CREATE\",\"OVERWRITE\",\"APPEND\"]},\"java-class\":\"org.apache.hadoop.io.EnumSetWritable\"}";
+    Type type =
+      TestEnumSetWritable.class.getField("testField").getGenericType();
+    AvroTestUtil.testReflect(nonEmptyFlagWritable, type, schema);
+  }
+
 }

src/test/core/org/apache/hadoop/io/TestText.java

@@ -253,6 +253,12 @@ public class TestText extends TestCase {
     thread2.join();
   }
 
+  public void testAvroReflect() throws Exception {
+    AvroTestUtil.testReflect
+      (new Text("foo"),
+       "{\"type\":\"string\",\"java-class\":\"org.apache.hadoop.io.Text\"}");
+  }
+
   public static void main(String[] args)  throws Exception
   {
     TestText test = new TestText("main");