Package com.google.gson.internal

Class $Gson$Types

java.lang.Object

com.google.gson.internal.$Gson$Types

public final class $Gson$Types
extends Object

Static methods for working with types.

Author:

Bob Lee, Jesse Wilson

Method Summary

Modifier and Type	Method	Description
static GenericArrayType	arrayOf(Type componentType)	Returns an array type whose elements are all instances of componentType.
static Type	canonicalize(Type type)	Returns a type that is functionally equal but not necessarily equal according to Object.equals().
static boolean	equals(Type a, Type b)	Returns true if a and b are equal.
static Type	getArrayComponentType(Type array)	Returns the component type of this array type.
static Type	getCollectionElementType(Type context, Class<?> contextRawType)	Returns the element type of this collection type.
static Type[]	getMapKeyAndValueTypes(Type context, Class<?> contextRawType)	Returns a two element array containing this map's key and value types in positions 0 and 1 respectively.
static Class<?>	getRawType(Type type)
static ParameterizedType	newParameterizedTypeWithOwner(Type ownerType, Type rawType, Type... typeArguments)	Returns a new parameterized type, applying typeArguments to rawType and enclosed by ownerType.
static Type	resolve(Type context, Class<?> contextRawType, Type toResolve)
static WildcardType	subtypeOf(Type bound)	Returns a type that represents an unknown type that extends bound.
static WildcardType	supertypeOf(Type bound)	Returns a type that represents an unknown supertype of bound.
static String	typeToString(Type type)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

newParameterizedTypeWithOwner

public static ParameterizedType newParameterizedTypeWithOwner(Type ownerType,
                                                              Type rawType,
                                                              Type... typeArguments)

Returns a new parameterized type, applying typeArguments to rawType and enclosed by ownerType.

Returns:

a serializable parameterized type.

arrayOf

public static GenericArrayType arrayOf(Type componentType)

Returns an array type whose elements are all instances of componentType.

Returns:

a serializable generic array type.

subtypeOf

public static WildcardType subtypeOf(Type bound)

Returns a type that represents an unknown type that extends bound. For example, if bound is CharSequence.class, this returns ? extends CharSequence. If bound is Object.class, this returns ?, which is shorthand for ? extends Object.

supertypeOf

public static WildcardType supertypeOf(Type bound)

Returns a type that represents an unknown supertype of bound. For example, if bound is String.class, this returns ? super String.

canonicalize

public static Type canonicalize(Type type)

Returns a type that is functionally equal but not necessarily equal according to Object.equals(). The returned type is Serializable.

getRawType

public static Class<?> getRawType(Type type)

equals

public static boolean equals(Type a,
                             Type b)

Returns true if a and b are equal.

typeToString

public static String typeToString(Type type)

getArrayComponentType

public static Type getArrayComponentType(Type array)

Returns the component type of this array type.

Throws:

ClassCastException - if this type is not an array.

getCollectionElementType

public static Type getCollectionElementType(Type context,
                                            Class<?> contextRawType)

Returns the element type of this collection type.

Throws:

IllegalArgumentException - if this type is not a collection.

getMapKeyAndValueTypes

public static Type[] getMapKeyAndValueTypes(Type context,
                                            Class<?> contextRawType)

Returns a two element array containing this map's key and value types in positions 0 and 1 respectively.

resolve

public static Type resolve(Type context,
                           Class<?> contextRawType,
                           Type toResolve)