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/**
* Copyright (c) 2008, SnakeYAML
*
* 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 org.yaml.snakeyaml.introspector;
import java.lang.reflect.Array;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
public abstract class GenericProperty extends Property {
private final Type genType;
public GenericProperty(String name, Class<?> aClass, Type aType) {
super(name, aClass);
genType = aType;
actualClassesChecked = aType == null;
}
private boolean actualClassesChecked;
private Class<?>[] actualClasses;
public Class<?>[] getActualTypeArguments() { // should we synchronize here ?
if (!actualClassesChecked) {
if (genType instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) genType;
Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();
if (actualTypeArguments.length > 0) {
actualClasses = new Class<?>[actualTypeArguments.length];
for (int i = 0; i < actualTypeArguments.length; i++) {
if (actualTypeArguments[i] instanceof Class<?>) {
actualClasses[i] = (Class<?>) actualTypeArguments[i];
} else if (actualTypeArguments[i] instanceof ParameterizedType) {
actualClasses[i] =
(Class<?>) ((ParameterizedType) actualTypeArguments[i]).getRawType();
} else if (actualTypeArguments[i] instanceof GenericArrayType) {
Type componentType =
((GenericArrayType) actualTypeArguments[i]).getGenericComponentType();
if (componentType instanceof Class<?>) {
actualClasses[i] = Array.newInstance((Class<?>) componentType, 0).getClass();
} else {
actualClasses = null;
break;
}
} else {
actualClasses = null;
break;
}
}
}
} else if (genType instanceof GenericArrayType) {
Type componentType = ((GenericArrayType) genType).getGenericComponentType();
if (componentType instanceof Class<?>) {
actualClasses = new Class<?>[] {(Class<?>) componentType};
}
} else if (genType instanceof Class<?>) {// XXX this check is only
// required for IcedTea6
Class<?> classType = (Class<?>) genType;
if (classType.isArray()) {
actualClasses = new Class<?>[1];
actualClasses[0] = getType().getComponentType();
}
}
actualClassesChecked = true;
}
return actualClasses;
}
}
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