/*
* Copyright (C) 2008 Google Inc.
*
* Licensed 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 com.google.gson;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.Type;
/**
* Class to extract information about types used to define a generic array.
*
* @author Inderjeet Singh
* @author Joel Leitch
*/
final class TypeInfoArray extends TypeInfo {
private final Class<?> componentRawType;
private final Type secondLevel;
TypeInfoArray(Type type) {
super(type);
Class<?> rootComponentType = rawClass;
while (rootComponentType.isArray()) {
rootComponentType = rootComponentType.getComponentType();
}
this.componentRawType = rootComponentType;
this.secondLevel = extractSecondLevelType(actualType, rawClass);
}
private static Type extractSecondLevelType(Type actualType, Class<?> rawClass) {
if (actualType instanceof GenericArrayType) {
GenericArrayType castedType = (GenericArrayType) actualType;
return castedType.getGenericComponentType();
} else {
return rawClass.getComponentType();
}
}
/**
* @return the raw type unwrapped of the second level of array.
* If the object is (single-dimensional or multi-dimensional) array, it is the class of the
* elements of the array. For example, this method returns Foo.class for Foo[].
* It will return Foo[].class for Foo[][]. For Foo<String>[][] types, it will return the
* type representing Foo<String>[]
* (i.e. <code>new TypeToken<Foo<String>[]>() {}.getType()</code>).
*/
public Type getSecondLevelType() {
return secondLevel;
}
/**
* @return the raw type of the root component.
* If the object is a single-dimensional array then the component type is the class of an
* element of the array.
* If the object is a multi-dimensional array then the component type is the class of the
* inner-most array element. For example, the This method will return Foo.class for Foo[][][].
*/
public Class<?> getComponentRawType() {
return componentRawType;
}
}