[LANG-1420] TypeUtils.isAssignable returns wrong result for

GenericArrayType and ParameterizedType.
This commit is contained in:
Gary Gregory 2020-11-15 11:49:11 -05:00
parent e123bab198
commit 35799d0958
3 changed files with 453 additions and 366 deletions

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@ -52,12 +52,13 @@ The <action> type attribute can be add,update,fix,remove.
<action type="fix" dev="ggregory" due-to="iamchao1129">ContextedException Javadoc add missing semicolon #581.</action>
<action issue="LANG-1608" type="fix" dev="aherbert" due-to="Edgar Asatryan">Resolve JUnit pioneer transitive dependencies using JUnit BOM.</action>
<action type="fix" dev="aherbert" due-to="HubertWo, Gary Gregory">NumberUtilsTest - incorrect types in min/max tests #634.</action>
<action issue="LANG-1579" type="update" dev="aherbert" due-to="XenoAmess">Improve StringUtils.stripAccents conversion of remaining accents.</action>
<action issue="LANG-1606" type="update" dev="sebb" due-to="Rustem Galiev">StringUtils.countMatches - clarify Javadoc.</action>
<action issue="LANG-1591" type="update" dev="kinow" due-to="bhawna94">Remove redundant argument from substring call.</action>
<action issue="LANG-1613" type="update" dev="ggregory" due-to="Arturo Bernal, Gary Gregory">BigDecimal is created when you pass it the min and max values, #642.</action>
<action issue="LANG-1541" type="update" dev="ggregory" due-to="Arturo Bernal, Gary Gregory">ArrayUtils.contains() and indexOf() fails to handle Double.NaN #647.</action>
<action issue="LANG-1541" type="update" dev="ggregory" due-to="Gary Gregory">Fix potential NPE in TypeUtils.isAssignable(Type, ParameterizedType, Map, Type>).</action>
<action issue="LANG-1579" type="fix" dev="aherbert" due-to="XenoAmess">Improve StringUtils.stripAccents conversion of remaining accents.</action>
<action issue="LANG-1606" type="fix" dev="sebb" due-to="Rustem Galiev">StringUtils.countMatches - clarify Javadoc.</action>
<action issue="LANG-1591" type="fix" dev="kinow" due-to="bhawna94">Remove redundant argument from substring call.</action>
<action issue="LANG-1613" type="fix" dev="ggregory" due-to="Arturo Bernal, Gary Gregory">BigDecimal is created when you pass it the min and max values, #642.</action>
<action issue="LANG-1541" type="fix" dev="ggregory" due-to="Arturo Bernal, Gary Gregory">ArrayUtils.contains() and indexOf() fails to handle Double.NaN #647.</action>
<action type="fix" dev="ggregory" due-to="Gary Gregory">Fix potential NPE in TypeUtils.isAssignable(Type, ParameterizedType, Map, Type>).</action>
<action issue="LANG-1420" type="fix" dev="ggregory" due-to="Gordon Fraser, Rostislav Krasny, Arturo Bernal, Gary Gregory">TypeUtils.isAssignable returns wrong result for GenericArrayType and ParameterizedType, #643.</action>
<!-- ADDS -->
<action type="add" dev="ggregory" due-to="Gary Gregory">Add BooleanUtils.booleanValues().</action>

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@ -388,7 +388,7 @@ private static boolean containsVariableTypeSameParametrizedTypeBound(final TypeV
* the type arguments for the subject class's type variables in that it can
* only determine those parameters that map from the subject {@link Class}
* object to the supertype.
*
*
* <p>
* Example: {@link java.util.TreeSet
* TreeSet} sets its parameter as the parameter for
@ -924,7 +924,7 @@ private static Map<TypeVariable<?>, Type> getTypeArguments(
* interface {@link Map} are {@link Object} for the subtype
* {@link java.util.Properties Properties} even though the subtype does not
* directly implement the {@code Map} interface.
*
*
* <p>
* This method returns {@code null} if {@code type} is not assignable to
* {@code toClass}. It returns an empty map if none of the classes or
@ -1182,6 +1182,11 @@ private static boolean isAssignable(final Type type, final ParameterizedType toP
return false;
}
// cannot cast an array type to a parameterized type.
if (type instanceof GenericArrayType) {
return false;
}
// all types are assignable to themselves
if (toParameterizedType.equals(type)) {
return true;
@ -1482,7 +1487,7 @@ private static <T> void mapTypeVariablesToArguments(final Class<T> cls,
* Strips out the redundant upper bound types in type
* variable types and wildcard types (or it would with wildcard types if
* multiple upper bounds were allowed).
*
*
* <p>
* Example, with the variable type declaration:
* </p>

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@ -22,7 +22,9 @@
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.awt.Insets;
import java.io.Serializable;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.Method;
@ -43,8 +45,62 @@
import org.apache.commons.lang3.reflect.testbed.GenericParent;
import org.apache.commons.lang3.reflect.testbed.GenericTypeHolder;
import org.apache.commons.lang3.reflect.testbed.StringParameterizedChild;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
class AAAClass extends AAClass<String> {
public class BBBClass extends BBClass<String> {
}
}
class AAClass<T> {
public class BBClass<S> {
}
}
@SuppressWarnings("rawtypes")
//raw types, where used, are used purposely
class AClass extends AAClass<String>.BBClass<Number> {
public interface AInterface<T> {
}
public class BClass<T> {
}
public class CClass<T> extends BClass {
}
public class DClass<T> extends CClass<T> {
}
public class EClass<T> extends DClass {
}
public class FClass extends EClass<String> {
}
public class GClass<T extends BClass<? extends T> & AInterface<AInterface<? super T>>> {
}
public BClass<Number> bClass;
public CClass<? extends String> cClass;
public DClass<String> dClass;
public EClass<String> eClass;
public FClass fClass;
public GClass gClass;
AClass(final AAClass<String> enclosingInstance) {
enclosingInstance.super();
}
}
/**
* Test TypeUtils
*/
@ -52,25 +108,59 @@
//raw types, where used, are used purposely
public class TypeUtilsTest<B> {
public interface This<K, V> {
}
public class That<K, V> implements This<K, V> {
}
public interface And<K, V> extends This<Number, Number> {
}
public class The<K, V> extends That<Number, Number> implements And<String, String> {
public static class ClassWithSuperClassWithGenericType extends ArrayList<Object> {
private static final long serialVersionUID = 1L;
public static <U> Iterable<U> methodWithGenericReturnType() {
return null;
}
}
public class Other<T> implements This<String, T> {
}
public class Tester implements This<String, B> {
}
public class That<K, V> implements This<K, V> {
}
public class The<K, V> extends That<Number, Number> implements And<String, String> {
}
public class Thing<Q> extends Other<B> {
}
public class Tester implements This<String, B> {
public interface This<K, V> {
}
public static Comparable<String> stringComparable;
public static Comparable<URI> uriComparable;
public static Comparable<Integer> intComparable;
public static Comparable<Long> longComparable;
public static Comparable<?> wildcardComparable;
public static URI uri;
public static List<String>[] stringListArray;
public static <G extends Comparable<G>> G stub() {
return null;
}
public static <G extends Comparable<? super G>> G stub2() {
return null;
}
public static <T extends Comparable<? extends T>> T stub3() {
return null;
}
public This<String, String> dis;
@ -93,19 +183,25 @@ public class Tester implements This<String, B> {
public Comparable<? extends Integer>[] intWildcardComparable;
public static Comparable<String> stringComparable;
public Iterable<? extends Map<Integer, ? extends Collection<?>>> iterable;
public static Comparable<URI> uriComparable;
public void delegateBooleanAssertion(final Type[] types, final int i2, final int i1, final boolean expected) {
final Type type1 = types[i1];
final Type type2 = types[i2];
final boolean isAssignable = TypeUtils.isAssignable(type2, type1);
public static Comparable<Integer> intComparable;
public static Comparable<Long> longComparable;
public static Comparable<?> wildcardComparable;
public static URI uri;
public static List<String>[] stringListArray;
if (expected) {
assertTrue(isAssignable,
"[" + i1 + ", " + i2 + "]: From "
+ String.valueOf(type2) + " to "
+ String.valueOf(type1));
} else {
assertFalse(isAssignable,
"[" + i1 + ", " + i2 + "]: From "
+ String.valueOf(type2) + " to "
+ String.valueOf(type1));
}
}
public void dummyMethod(final List list0, final List<Object> list1, final List<?> list2,
final List<? super Object> list3, final List<String> list4, final List<? extends String> list5,
@ -114,6 +210,197 @@ public void dummyMethod(final List list0, final List<Object> list1, final List<?
final List<? super String>[] list13) {
}
@Test
public void testDetermineTypeVariableAssignments() throws SecurityException,
NoSuchFieldException {
final ParameterizedType iterableType = (ParameterizedType) getClass().getField("iterable")
.getGenericType();
final Map<TypeVariable<?>, Type> typeVarAssigns = TypeUtils.determineTypeArguments(TreeSet.class,
iterableType);
final TypeVariable<?> treeSetTypeVar = TreeSet.class.getTypeParameters()[0];
assertTrue(typeVarAssigns.containsKey(treeSetTypeVar));
assertEquals(iterableType.getActualTypeArguments()[0], typeVarAssigns
.get(treeSetTypeVar));
}
@Test
public void testGenericArrayType() throws Exception {
final Type expected = getClass().getField("intWildcardComparable").getGenericType();
final GenericArrayType actual =
TypeUtils.genericArrayType(TypeUtils.parameterize(Comparable.class, TypeUtils.wildcardType()
.withUpperBounds(Integer.class).build()));
assertTrue(TypeUtils.equals(expected, actual));
assertEquals("java.lang.Comparable<? extends java.lang.Integer>[]", actual.toString());
}
@Test
public void testGetArrayComponentType() throws Exception {
final Method method = getClass().getMethod("dummyMethod", List.class, List.class, List.class,
List.class, List.class, List.class, List.class, List[].class, List[].class,
List[].class, List[].class, List[].class, List[].class, List[].class);
final Type[] types = method.getGenericParameterTypes();
assertNull(TypeUtils.getArrayComponentType(types[0]));
assertNull(TypeUtils.getArrayComponentType(types[1]));
assertNull(TypeUtils.getArrayComponentType(types[2]));
assertNull(TypeUtils.getArrayComponentType(types[3]));
assertNull(TypeUtils.getArrayComponentType(types[4]));
assertNull(TypeUtils.getArrayComponentType(types[5]));
assertNull(TypeUtils.getArrayComponentType(types[6]));
assertEquals(types[0], TypeUtils.getArrayComponentType(types[7]));
assertEquals(types[1], TypeUtils.getArrayComponentType(types[8]));
assertEquals(types[2], TypeUtils.getArrayComponentType(types[9]));
assertEquals(types[3], TypeUtils.getArrayComponentType(types[10]));
assertEquals(types[4], TypeUtils.getArrayComponentType(types[11]));
assertEquals(types[5], TypeUtils.getArrayComponentType(types[12]));
assertEquals(types[6], TypeUtils.getArrayComponentType(types[13]));
}
@Test
public void testGetPrimitiveArrayComponentType() {
assertEquals(boolean.class, TypeUtils.getArrayComponentType(boolean[].class));
assertEquals(byte.class, TypeUtils.getArrayComponentType(byte[].class));
assertEquals(short.class, TypeUtils.getArrayComponentType(short[].class));
assertEquals(int.class, TypeUtils.getArrayComponentType(int[].class));
assertEquals(char.class, TypeUtils.getArrayComponentType(char[].class));
assertEquals(long.class, TypeUtils.getArrayComponentType(long[].class));
assertEquals(float.class, TypeUtils.getArrayComponentType(float[].class));
assertEquals(double.class, TypeUtils.getArrayComponentType(double[].class));
assertNull(TypeUtils.getArrayComponentType(boolean.class));
assertNull(TypeUtils.getArrayComponentType(byte.class));
assertNull(TypeUtils.getArrayComponentType(short.class));
assertNull(TypeUtils.getArrayComponentType(int.class));
assertNull(TypeUtils.getArrayComponentType(char.class));
assertNull(TypeUtils.getArrayComponentType(long.class));
assertNull(TypeUtils.getArrayComponentType(float.class));
assertNull(TypeUtils.getArrayComponentType(double.class));
}
@Test
public void testGetRawType() throws SecurityException, NoSuchFieldException {
final Type stringParentFieldType = GenericTypeHolder.class.getDeclaredField("stringParent")
.getGenericType();
final Type integerParentFieldType = GenericTypeHolder.class.getDeclaredField("integerParent")
.getGenericType();
final Type foosFieldType = GenericTypeHolder.class.getDeclaredField("foos").getGenericType();
final Type genericParentT = GenericParent.class.getTypeParameters()[0];
assertEquals(GenericParent.class, TypeUtils.getRawType(stringParentFieldType, null));
assertEquals(GenericParent.class, TypeUtils.getRawType(integerParentFieldType,
null));
assertEquals(List.class, TypeUtils.getRawType(foosFieldType, null));
assertEquals(String.class, TypeUtils.getRawType(genericParentT,
StringParameterizedChild.class));
assertEquals(String.class, TypeUtils.getRawType(genericParentT,
stringParentFieldType));
assertEquals(Foo.class, TypeUtils.getRawType(Iterable.class.getTypeParameters()[0],
foosFieldType));
assertEquals(Foo.class, TypeUtils.getRawType(List.class.getTypeParameters()[0],
foosFieldType));
assertNull(TypeUtils.getRawType(genericParentT, GenericParent.class));
assertEquals(GenericParent[].class, TypeUtils.getRawType(GenericTypeHolder.class
.getDeclaredField("barParents").getGenericType(), null));
}
@Test
public void testGetTypeArguments() {
Map<TypeVariable<?>, Type> typeVarAssigns;
TypeVariable<?> treeSetTypeVar;
Type typeArg;
typeVarAssigns = TypeUtils.getTypeArguments(Integer.class, Comparable.class);
treeSetTypeVar = Comparable.class.getTypeParameters()[0];
assertTrue(typeVarAssigns.containsKey(treeSetTypeVar),
"Type var assigns for Comparable from Integer: " + typeVarAssigns);
typeArg = typeVarAssigns.get(treeSetTypeVar);
assertEquals(Integer.class, typeVarAssigns.get(treeSetTypeVar),
"Type argument of Comparable from Integer: " + typeArg);
typeVarAssigns = TypeUtils.getTypeArguments(int.class, Comparable.class);
treeSetTypeVar = Comparable.class.getTypeParameters()[0];
assertTrue(typeVarAssigns.containsKey(treeSetTypeVar),
"Type var assigns for Comparable from int: " + typeVarAssigns);
typeArg = typeVarAssigns.get(treeSetTypeVar);
assertEquals(Integer.class, typeVarAssigns.get(treeSetTypeVar),
"Type argument of Comparable from int: " + typeArg);
final Collection<Integer> col = Collections.emptyList();
typeVarAssigns = TypeUtils.getTypeArguments(List.class, Collection.class);
treeSetTypeVar = Comparable.class.getTypeParameters()[0];
assertFalse(typeVarAssigns.containsKey(treeSetTypeVar),
"Type var assigns for Collection from List: " + typeVarAssigns);
typeVarAssigns = TypeUtils.getTypeArguments(AAAClass.BBBClass.class, AAClass.BBClass.class);
assertEquals(2, typeVarAssigns.size());
assertEquals(String.class, typeVarAssigns.get(AAClass.class.getTypeParameters()[0]));
assertEquals(String.class, typeVarAssigns.get(AAClass.BBClass.class.getTypeParameters()[0]));
typeVarAssigns = TypeUtils.getTypeArguments(Other.class, This.class);
assertEquals(2, typeVarAssigns.size());
assertEquals(String.class, typeVarAssigns.get(This.class.getTypeParameters()[0]));
assertEquals(Other.class.getTypeParameters()[0], typeVarAssigns.get(This.class.getTypeParameters()[1]));
typeVarAssigns = TypeUtils.getTypeArguments(And.class, This.class);
assertEquals(2, typeVarAssigns.size());
assertEquals(Number.class, typeVarAssigns.get(This.class.getTypeParameters()[0]));
assertEquals(Number.class, typeVarAssigns.get(This.class.getTypeParameters()[1]));
typeVarAssigns = TypeUtils.getTypeArguments(Thing.class, Other.class);
assertEquals(2, typeVarAssigns.size());
assertEquals(getClass().getTypeParameters()[0], typeVarAssigns.get(getClass().getTypeParameters()[0]));
assertEquals(getClass().getTypeParameters()[0], typeVarAssigns.get(Other.class.getTypeParameters()[0]));
}
@Test
public void testIsArrayGenericTypes() throws Exception {
final Method method = getClass().getMethod("dummyMethod", List.class, List.class, List.class,
List.class, List.class, List.class, List.class, List[].class, List[].class,
List[].class, List[].class, List[].class, List[].class, List[].class);
final Type[] types = method.getGenericParameterTypes();
assertFalse(TypeUtils.isArrayType(types[0]));
assertFalse(TypeUtils.isArrayType(types[1]));
assertFalse(TypeUtils.isArrayType(types[2]));
assertFalse(TypeUtils.isArrayType(types[3]));
assertFalse(TypeUtils.isArrayType(types[4]));
assertFalse(TypeUtils.isArrayType(types[5]));
assertFalse(TypeUtils.isArrayType(types[6]));
assertTrue(TypeUtils.isArrayType(types[7]));
assertTrue(TypeUtils.isArrayType(types[8]));
assertTrue(TypeUtils.isArrayType(types[9]));
assertTrue(TypeUtils.isArrayType(types[10]));
assertTrue(TypeUtils.isArrayType(types[11]));
assertTrue(TypeUtils.isArrayType(types[12]));
assertTrue(TypeUtils.isArrayType(types[13]));
}
@Test
public void testIsArrayTypeClasses() {
assertTrue(TypeUtils.isArrayType(boolean[].class));
assertTrue(TypeUtils.isArrayType(byte[].class));
assertTrue(TypeUtils.isArrayType(short[].class));
assertTrue(TypeUtils.isArrayType(int[].class));
assertTrue(TypeUtils.isArrayType(char[].class));
assertTrue(TypeUtils.isArrayType(long[].class));
assertTrue(TypeUtils.isArrayType(float[].class));
assertTrue(TypeUtils.isArrayType(double[].class));
assertTrue(TypeUtils.isArrayType(Object[].class));
assertTrue(TypeUtils.isArrayType(String[].class));
assertFalse(TypeUtils.isArrayType(boolean.class));
assertFalse(TypeUtils.isArrayType(byte.class));
assertFalse(TypeUtils.isArrayType(short.class));
assertFalse(TypeUtils.isArrayType(int.class));
assertFalse(TypeUtils.isArrayType(char.class));
assertFalse(TypeUtils.isArrayType(long.class));
assertFalse(TypeUtils.isArrayType(float.class));
assertFalse(TypeUtils.isArrayType(double.class));
assertFalse(TypeUtils.isArrayType(Object.class));
assertFalse(TypeUtils.isArrayType(String.class));
}
@SuppressWarnings("boxing") // deliberately used here
@Test
public void testIsAssignable() throws SecurityException, NoSuchMethodException,
@ -452,22 +739,82 @@ public void testIsAssignable() throws SecurityException, NoSuchMethodException,
assertTrue(TypeUtils.isAssignable(fClassType, eClassType));
}
public void delegateBooleanAssertion(final Type[] types, final int i2, final int i1, final boolean expected) {
final Type type1 = types[i1];
final Type type2 = types[i2];
final boolean isAssignable = TypeUtils.isAssignable(type2, type1);
private void testIsAssignable(Class testUnassignableClass) {
final Class<Constructor> rawClass = Constructor.class;
final Class<Insets> typeArgClass = Insets.class;
// Builds a ParameterizedType for Constructor<Insets>
ParameterizedType paramType = TypeUtils.parameterize(rawClass, typeArgClass);
assertEquals(rawClass, paramType.getRawType());
assertEquals(typeArgClass, paramType.getActualTypeArguments()[0]);
if (expected) {
assertTrue(isAssignable,
"[" + i1 + ", " + i2 + "]: From "
+ String.valueOf(type2) + " to "
+ String.valueOf(type1));
} else {
assertFalse(isAssignable,
"[" + i1 + ", " + i2 + "]: From "
+ String.valueOf(type2) + " to "
+ String.valueOf(type1));
}
assertFalse(testUnassignableClass.isAssignableFrom(paramType.getClass()));
assertFalse(paramType.getClass().isAssignableFrom(testUnassignableClass));
GenericArrayType arrayType = TypeUtils.genericArrayType(paramType);
assertFalse(TypeUtils.isAssignable(arrayType, paramType),
() -> String.format("TypeUtils.isAssignable(%s, %s)", arrayType, paramType));
assertFalse(TypeUtils.isAssignable(paramType, arrayType),
() -> String.format("TypeUtils.isAssignable(%s, %s)", paramType, arrayType));
}
@Test
public void testIsAssignableGenericArrayTypeToParameterizedType() {
final Class<Constructor> rawClass = Constructor.class;
final Class<Insets> typeArgClass = Insets.class;
// Builds a ParameterizedType for Constructor<Insets>
ParameterizedType paramType = TypeUtils.parameterize(rawClass, typeArgClass);
assertEquals(rawClass, paramType.getRawType());
assertEquals(typeArgClass, paramType.getActualTypeArguments()[0]);
assertFalse(GenericArrayType.class.isAssignableFrom(paramType.getClass()));
assertFalse(paramType.getClass().isAssignableFrom(GenericArrayType.class));
GenericArrayType testType = TypeUtils.genericArrayType(paramType);
assertFalse(TypeUtils.isAssignable(paramType, testType),
() -> String.format("TypeUtils.isAssignable(%s, %s)", paramType, testType));
assertFalse(TypeUtils.isAssignable(testType, paramType),
() -> String.format("TypeUtils.isAssignable(%s, %s)", testType, paramType));
}
@Test
@Disabled("TODO")
public void testIsAssignableGenericArrayTypeToWildercardType() {
final Class<Constructor> rawClass = Constructor.class;
final Class<Insets> typeArgClass = Insets.class;
// Builds a ParameterizedType for Constructor<Insets>
ParameterizedType paramType = TypeUtils.parameterize(rawClass, typeArgClass);
assertEquals(rawClass, paramType.getRawType());
assertEquals(typeArgClass, paramType.getActualTypeArguments()[0]);
assertFalse(WildcardType.class.isAssignableFrom(paramType.getClass()));
assertFalse(paramType.getClass().isAssignableFrom(WildcardType.class));
WildcardType testType = TypeUtils.WILDCARD_ALL;
// TODO This test returns true unlike the test above.
// Is this a bug in this test or in the main code?
assertFalse(TypeUtils.isAssignable(paramType, testType),
() -> String.format("TypeUtils.isAssignable(%s, %s)", paramType, testType));
assertFalse(TypeUtils.isAssignable(testType, paramType),
() -> String.format("TypeUtils.isAssignable(%s, %s)", testType, paramType));
}
@Test
public void testIsAssignableGenericArrayTypeToObject() {
final Class<Constructor> rawClass = Constructor.class;
final Class<Insets> typeArgClass = Insets.class;
// Builds a ParameterizedType for Constructor<Insets>
ParameterizedType paramType = TypeUtils.parameterize(rawClass, typeArgClass);
assertEquals(rawClass, paramType.getRawType());
assertEquals(typeArgClass, paramType.getActualTypeArguments()[0]);
assertTrue(Object.class.isAssignableFrom(paramType.getClass()));
assertFalse(paramType.getClass().isAssignableFrom(Object.class));
Type testType = Object.class;
assertTrue(TypeUtils.isAssignable(paramType, testType),
() -> String.format("TypeUtils.isAssignable(%s, %s)", paramType, testType));
assertFalse(TypeUtils.isAssignable(testType, paramType),
() -> String.format("TypeUtils.isAssignable(%s, %s)", testType, paramType));
}
@SuppressWarnings("boxing") // boxing is deliberate here
@ -482,199 +829,26 @@ public void testIsInstance() throws SecurityException, NoSuchFieldException {
}
@Test
public void testGetTypeArguments() {
Map<TypeVariable<?>, Type> typeVarAssigns;
TypeVariable<?> treeSetTypeVar;
Type typeArg;
public void testLang1114() throws Exception {
final Type nonWildcardType = getClass().getDeclaredField("wildcardComparable").getGenericType();
final Type wildcardType = ((ParameterizedType) nonWildcardType).getActualTypeArguments()[0];
typeVarAssigns = TypeUtils.getTypeArguments(Integer.class, Comparable.class);
treeSetTypeVar = Comparable.class.getTypeParameters()[0];
assertTrue(typeVarAssigns.containsKey(treeSetTypeVar),
"Type var assigns for Comparable from Integer: " + typeVarAssigns);
typeArg = typeVarAssigns.get(treeSetTypeVar);
assertEquals(Integer.class, typeVarAssigns.get(treeSetTypeVar),
"Type argument of Comparable from Integer: " + typeArg);
typeVarAssigns = TypeUtils.getTypeArguments(int.class, Comparable.class);
treeSetTypeVar = Comparable.class.getTypeParameters()[0];
assertTrue(typeVarAssigns.containsKey(treeSetTypeVar),
"Type var assigns for Comparable from int: " + typeVarAssigns);
typeArg = typeVarAssigns.get(treeSetTypeVar);
assertEquals(Integer.class, typeVarAssigns.get(treeSetTypeVar),
"Type argument of Comparable from int: " + typeArg);
final Collection<Integer> col = Collections.emptyList();
typeVarAssigns = TypeUtils.getTypeArguments(List.class, Collection.class);
treeSetTypeVar = Comparable.class.getTypeParameters()[0];
assertFalse(typeVarAssigns.containsKey(treeSetTypeVar),
"Type var assigns for Collection from List: " + typeVarAssigns);
typeVarAssigns = TypeUtils.getTypeArguments(AAAClass.BBBClass.class, AAClass.BBClass.class);
assertEquals(2, typeVarAssigns.size());
assertEquals(String.class, typeVarAssigns.get(AAClass.class.getTypeParameters()[0]));
assertEquals(String.class, typeVarAssigns.get(AAClass.BBClass.class.getTypeParameters()[0]));
typeVarAssigns = TypeUtils.getTypeArguments(Other.class, This.class);
assertEquals(2, typeVarAssigns.size());
assertEquals(String.class, typeVarAssigns.get(This.class.getTypeParameters()[0]));
assertEquals(Other.class.getTypeParameters()[0], typeVarAssigns.get(This.class.getTypeParameters()[1]));
typeVarAssigns = TypeUtils.getTypeArguments(And.class, This.class);
assertEquals(2, typeVarAssigns.size());
assertEquals(Number.class, typeVarAssigns.get(This.class.getTypeParameters()[0]));
assertEquals(Number.class, typeVarAssigns.get(This.class.getTypeParameters()[1]));
typeVarAssigns = TypeUtils.getTypeArguments(Thing.class, Other.class);
assertEquals(2, typeVarAssigns.size());
assertEquals(getClass().getTypeParameters()[0], typeVarAssigns.get(getClass().getTypeParameters()[0]));
assertEquals(getClass().getTypeParameters()[0], typeVarAssigns.get(Other.class.getTypeParameters()[0]));
assertFalse(TypeUtils.equals(wildcardType, nonWildcardType));
assertFalse(TypeUtils.equals(nonWildcardType, wildcardType));
}
@Test
public void testTypesSatisfyVariables() throws SecurityException,
NoSuchMethodException {
final Map<TypeVariable<?>, Type> typeVarAssigns = new HashMap<>();
final Integer max = TypeUtilsTest.<Integer>stub();
typeVarAssigns.put(getClass().getMethod("stub").getTypeParameters()[0], Integer.class);
assertTrue(TypeUtils.typesSatisfyVariables(typeVarAssigns));
typeVarAssigns.clear();
typeVarAssigns.put(getClass().getMethod("stub2").getTypeParameters()[0], Integer.class);
assertTrue(TypeUtils.typesSatisfyVariables(typeVarAssigns));
typeVarAssigns.clear();
typeVarAssigns.put(getClass().getMethod("stub3").getTypeParameters()[0], Integer.class);
assertTrue(TypeUtils.typesSatisfyVariables(typeVarAssigns));
public void testLANG1190() throws Exception {
final Type fromType = ClassWithSuperClassWithGenericType.class.getDeclaredMethod("methodWithGenericReturnType").getGenericReturnType();
final Type failingToType = TypeUtils.wildcardType().withLowerBounds(ClassWithSuperClassWithGenericType.class).build();
assertTrue(TypeUtils.isAssignable(fromType, failingToType));
}
@Test
public void testDetermineTypeVariableAssignments() throws SecurityException,
NoSuchFieldException {
final ParameterizedType iterableType = (ParameterizedType) getClass().getField("iterable")
.getGenericType();
final Map<TypeVariable<?>, Type> typeVarAssigns = TypeUtils.determineTypeArguments(TreeSet.class,
iterableType);
final TypeVariable<?> treeSetTypeVar = TreeSet.class.getTypeParameters()[0];
assertTrue(typeVarAssigns.containsKey(treeSetTypeVar));
assertEquals(iterableType.getActualTypeArguments()[0], typeVarAssigns
.get(treeSetTypeVar));
}
@Test
public void testGetRawType() throws SecurityException, NoSuchFieldException {
final Type stringParentFieldType = GenericTypeHolder.class.getDeclaredField("stringParent")
.getGenericType();
final Type integerParentFieldType = GenericTypeHolder.class.getDeclaredField("integerParent")
.getGenericType();
final Type foosFieldType = GenericTypeHolder.class.getDeclaredField("foos").getGenericType();
final Type genericParentT = GenericParent.class.getTypeParameters()[0];
assertEquals(GenericParent.class, TypeUtils.getRawType(stringParentFieldType, null));
assertEquals(GenericParent.class, TypeUtils.getRawType(integerParentFieldType,
null));
assertEquals(List.class, TypeUtils.getRawType(foosFieldType, null));
assertEquals(String.class, TypeUtils.getRawType(genericParentT,
StringParameterizedChild.class));
assertEquals(String.class, TypeUtils.getRawType(genericParentT,
stringParentFieldType));
assertEquals(Foo.class, TypeUtils.getRawType(Iterable.class.getTypeParameters()[0],
foosFieldType));
assertEquals(Foo.class, TypeUtils.getRawType(List.class.getTypeParameters()[0],
foosFieldType));
assertNull(TypeUtils.getRawType(genericParentT, GenericParent.class));
assertEquals(GenericParent[].class, TypeUtils.getRawType(GenericTypeHolder.class
.getDeclaredField("barParents").getGenericType(), null));
}
@Test
public void testIsArrayTypeClasses() {
assertTrue(TypeUtils.isArrayType(boolean[].class));
assertTrue(TypeUtils.isArrayType(byte[].class));
assertTrue(TypeUtils.isArrayType(short[].class));
assertTrue(TypeUtils.isArrayType(int[].class));
assertTrue(TypeUtils.isArrayType(char[].class));
assertTrue(TypeUtils.isArrayType(long[].class));
assertTrue(TypeUtils.isArrayType(float[].class));
assertTrue(TypeUtils.isArrayType(double[].class));
assertTrue(TypeUtils.isArrayType(Object[].class));
assertTrue(TypeUtils.isArrayType(String[].class));
assertFalse(TypeUtils.isArrayType(boolean.class));
assertFalse(TypeUtils.isArrayType(byte.class));
assertFalse(TypeUtils.isArrayType(short.class));
assertFalse(TypeUtils.isArrayType(int.class));
assertFalse(TypeUtils.isArrayType(char.class));
assertFalse(TypeUtils.isArrayType(long.class));
assertFalse(TypeUtils.isArrayType(float.class));
assertFalse(TypeUtils.isArrayType(double.class));
assertFalse(TypeUtils.isArrayType(Object.class));
assertFalse(TypeUtils.isArrayType(String.class));
}
@Test
public void testIsArrayGenericTypes() throws Exception {
final Method method = getClass().getMethod("dummyMethod", List.class, List.class, List.class,
List.class, List.class, List.class, List.class, List[].class, List[].class,
List[].class, List[].class, List[].class, List[].class, List[].class);
final Type[] types = method.getGenericParameterTypes();
assertFalse(TypeUtils.isArrayType(types[0]));
assertFalse(TypeUtils.isArrayType(types[1]));
assertFalse(TypeUtils.isArrayType(types[2]));
assertFalse(TypeUtils.isArrayType(types[3]));
assertFalse(TypeUtils.isArrayType(types[4]));
assertFalse(TypeUtils.isArrayType(types[5]));
assertFalse(TypeUtils.isArrayType(types[6]));
assertTrue(TypeUtils.isArrayType(types[7]));
assertTrue(TypeUtils.isArrayType(types[8]));
assertTrue(TypeUtils.isArrayType(types[9]));
assertTrue(TypeUtils.isArrayType(types[10]));
assertTrue(TypeUtils.isArrayType(types[11]));
assertTrue(TypeUtils.isArrayType(types[12]));
assertTrue(TypeUtils.isArrayType(types[13]));
}
@Test
public void testGetPrimitiveArrayComponentType() {
assertEquals(boolean.class, TypeUtils.getArrayComponentType(boolean[].class));
assertEquals(byte.class, TypeUtils.getArrayComponentType(byte[].class));
assertEquals(short.class, TypeUtils.getArrayComponentType(short[].class));
assertEquals(int.class, TypeUtils.getArrayComponentType(int[].class));
assertEquals(char.class, TypeUtils.getArrayComponentType(char[].class));
assertEquals(long.class, TypeUtils.getArrayComponentType(long[].class));
assertEquals(float.class, TypeUtils.getArrayComponentType(float[].class));
assertEquals(double.class, TypeUtils.getArrayComponentType(double[].class));
assertNull(TypeUtils.getArrayComponentType(boolean.class));
assertNull(TypeUtils.getArrayComponentType(byte.class));
assertNull(TypeUtils.getArrayComponentType(short.class));
assertNull(TypeUtils.getArrayComponentType(int.class));
assertNull(TypeUtils.getArrayComponentType(char.class));
assertNull(TypeUtils.getArrayComponentType(long.class));
assertNull(TypeUtils.getArrayComponentType(float.class));
assertNull(TypeUtils.getArrayComponentType(double.class));
}
@Test
public void testGetArrayComponentType() throws Exception {
final Method method = getClass().getMethod("dummyMethod", List.class, List.class, List.class,
List.class, List.class, List.class, List.class, List[].class, List[].class,
List[].class, List[].class, List[].class, List[].class, List[].class);
final Type[] types = method.getGenericParameterTypes();
assertNull(TypeUtils.getArrayComponentType(types[0]));
assertNull(TypeUtils.getArrayComponentType(types[1]));
assertNull(TypeUtils.getArrayComponentType(types[2]));
assertNull(TypeUtils.getArrayComponentType(types[3]));
assertNull(TypeUtils.getArrayComponentType(types[4]));
assertNull(TypeUtils.getArrayComponentType(types[5]));
assertNull(TypeUtils.getArrayComponentType(types[6]));
assertEquals(types[0], TypeUtils.getArrayComponentType(types[7]));
assertEquals(types[1], TypeUtils.getArrayComponentType(types[8]));
assertEquals(types[2], TypeUtils.getArrayComponentType(types[9]));
assertEquals(types[3], TypeUtils.getArrayComponentType(types[10]));
assertEquals(types[4], TypeUtils.getArrayComponentType(types[11]));
assertEquals(types[5], TypeUtils.getArrayComponentType(types[12]));
assertEquals(types[6], TypeUtils.getArrayComponentType(types[13]));
public void testLANG1348() throws Exception {
final Method method = Enum.class.getMethod("valueOf", Class.class, String.class);
assertEquals("T extends java.lang.Enum<T>", TypeUtils.toString(method.getGenericReturnType()));
}
@Test
@ -684,6 +858,18 @@ public void testLang820() {
assertArrayEquals(expectedArray, TypeUtils.normalizeUpperBounds(typeArray));
}
@Test
public void testLowerBoundedWildcardType() {
final WildcardType lowerBounded = TypeUtils.wildcardType().withLowerBounds(java.sql.Date.class).build();
assertEquals(String.format("? super %s", java.sql.Date.class.getName()), TypeUtils.toString(lowerBounded));
assertEquals(String.format("? super %s", java.sql.Date.class.getName()), lowerBounded.toString());
final TypeVariable<Class<Iterable>> iterableT0 = Iterable.class.getTypeParameters()[0];
final WildcardType lowerTypeVariable = TypeUtils.wildcardType().withLowerBounds(iterableT0).build();
assertEquals(String.format("? super %s", iterableT0.getName()), TypeUtils.toString(lowerTypeVariable));
assertEquals(String.format("? super %s", iterableT0.getName()), lowerTypeVariable.toString());
}
@Test
public void testParameterize() throws Exception {
final ParameterizedType stringComparableType = TypeUtils.parameterize(Comparable.class, String.class);
@ -709,13 +895,31 @@ public void testParameterizeWithOwner() throws Exception {
}
@Test
public void testWildcardType() throws Exception {
final WildcardType simpleWildcard = TypeUtils.wildcardType().withUpperBounds(String.class).build();
final Field cClass = AClass.class.getField("cClass");
assertTrue(TypeUtils.equals(((ParameterizedType) cClass.getGenericType()).getActualTypeArguments()[0],
simpleWildcard));
assertEquals(String.format("? extends %s", String.class.getName()), TypeUtils.toString(simpleWildcard));
assertEquals(String.format("? extends %s", String.class.getName()), simpleWildcard.toString());
public void testToLongString() {
assertEquals(getClass().getName() + ":B", TypeUtils.toLongString(getClass().getTypeParameters()[0]));
}
@Test
public void testToStringLang1311() {
assertEquals("int[]", TypeUtils.toString(int[].class));
assertEquals("java.lang.Integer[]", TypeUtils.toString(Integer[].class));
final Field stringListField = FieldUtils.getDeclaredField(getClass(), "stringListArray");
assertEquals("java.util.List<java.lang.String>[]", TypeUtils.toString(stringListField.getGenericType()));
}
@Test
public void testTypesSatisfyVariables() throws SecurityException,
NoSuchMethodException {
final Map<TypeVariable<?>, Type> typeVarAssigns = new HashMap<>();
final Integer max = TypeUtilsTest.<Integer>stub();
typeVarAssigns.put(getClass().getMethod("stub").getTypeParameters()[0], Integer.class);
assertTrue(TypeUtils.typesSatisfyVariables(typeVarAssigns));
typeVarAssigns.clear();
typeVarAssigns.put(getClass().getMethod("stub2").getTypeParameters()[0], Integer.class);
assertTrue(TypeUtils.typesSatisfyVariables(typeVarAssigns));
typeVarAssigns.clear();
typeVarAssigns.put(getClass().getMethod("stub3").getTypeParameters()[0], Integer.class);
assertTrue(TypeUtils.typesSatisfyVariables(typeVarAssigns));
}
@Test
@ -729,47 +933,13 @@ public void testUnboundedWildcardType() {
}
@Test
public void testLowerBoundedWildcardType() {
final WildcardType lowerBounded = TypeUtils.wildcardType().withLowerBounds(java.sql.Date.class).build();
assertEquals(String.format("? super %s", java.sql.Date.class.getName()), TypeUtils.toString(lowerBounded));
assertEquals(String.format("? super %s", java.sql.Date.class.getName()), lowerBounded.toString());
final TypeVariable<Class<Iterable>> iterableT0 = Iterable.class.getTypeParameters()[0];
final WildcardType lowerTypeVariable = TypeUtils.wildcardType().withLowerBounds(iterableT0).build();
assertEquals(String.format("? super %s", iterableT0.getName()), TypeUtils.toString(lowerTypeVariable));
assertEquals(String.format("? super %s", iterableT0.getName()), lowerTypeVariable.toString());
}
@Test
public void testLang1114() throws Exception {
final Type nonWildcardType = getClass().getDeclaredField("wildcardComparable").getGenericType();
final Type wildcardType = ((ParameterizedType) nonWildcardType).getActualTypeArguments()[0];
assertFalse(TypeUtils.equals(wildcardType, nonWildcardType));
assertFalse(TypeUtils.equals(nonWildcardType, wildcardType));
}
@Test
public void testGenericArrayType() throws Exception {
final Type expected = getClass().getField("intWildcardComparable").getGenericType();
final GenericArrayType actual =
TypeUtils.genericArrayType(TypeUtils.parameterize(Comparable.class, TypeUtils.wildcardType()
.withUpperBounds(Integer.class).build()));
assertTrue(TypeUtils.equals(expected, actual));
assertEquals("java.lang.Comparable<? extends java.lang.Integer>[]", actual.toString());
}
@Test
public void testToStringLang1311() {
assertEquals("int[]", TypeUtils.toString(int[].class));
assertEquals("java.lang.Integer[]", TypeUtils.toString(Integer[].class));
final Field stringListField = FieldUtils.getDeclaredField(getClass(), "stringListArray");
assertEquals("java.util.List<java.lang.String>[]", TypeUtils.toString(stringListField.getGenericType()));
}
@Test
public void testToLongString() {
assertEquals(getClass().getName() + ":B", TypeUtils.toLongString(getClass().getTypeParameters()[0]));
public void testWildcardType() throws Exception {
final WildcardType simpleWildcard = TypeUtils.wildcardType().withUpperBounds(String.class).build();
final Field cClass = AClass.class.getField("cClass");
assertTrue(TypeUtils.equals(((ParameterizedType) cClass.getGenericType()).getActualTypeArguments()[0],
simpleWildcard));
assertEquals(String.format("? extends %s", String.class.getName()), TypeUtils.toString(simpleWildcard));
assertEquals(String.format("? extends %s", String.class.getName()), simpleWildcard.toString());
}
@Test
@ -779,93 +949,4 @@ public void testWrap() {
assertEquals(String.class, TypeUtils.wrap(String.class).getType());
}
public static class ClassWithSuperClassWithGenericType extends ArrayList<Object> {
private static final long serialVersionUID = 1L;
public static <U> Iterable<U> methodWithGenericReturnType() {
return null;
}
}
@Test
public void testLANG1190() throws Exception {
final Type fromType = ClassWithSuperClassWithGenericType.class.getDeclaredMethod("methodWithGenericReturnType").getGenericReturnType();
final Type failingToType = TypeUtils.wildcardType().withLowerBounds(ClassWithSuperClassWithGenericType.class).build();
assertTrue(TypeUtils.isAssignable(fromType, failingToType));
}
@Test
public void testLANG1348() throws Exception {
final Method method = Enum.class.getMethod("valueOf", Class.class, String.class);
assertEquals("T extends java.lang.Enum<T>", TypeUtils.toString(method.getGenericReturnType()));
}
public Iterable<? extends Map<Integer, ? extends Collection<?>>> iterable;
public static <G extends Comparable<G>> G stub() {
return null;
}
public static <G extends Comparable<? super G>> G stub2() {
return null;
}
public static <T extends Comparable<? extends T>> T stub3() {
return null;
}
}
class AAClass<T> {
public class BBClass<S> {
}
}
class AAAClass extends AAClass<String> {
public class BBBClass extends BBClass<String> {
}
}
@SuppressWarnings("rawtypes")
//raw types, where used, are used purposely
class AClass extends AAClass<String>.BBClass<Number> {
AClass(final AAClass<String> enclosingInstance) {
enclosingInstance.super();
}
public class BClass<T> {
}
public class CClass<T> extends BClass {
}
public class DClass<T> extends CClass<T> {
}
public class EClass<T> extends DClass {
}
public class FClass extends EClass<String> {
}
public class GClass<T extends BClass<? extends T> & AInterface<AInterface<? super T>>> {
}
public BClass<Number> bClass;
public CClass<? extends String> cClass;
public DClass<String> dClass;
public EClass<String> eClass;
public FClass fClass;
public GClass gClass;
public interface AInterface<T> {
}
}