org.yaml.snakeyaml.introspector.GenericProperty Maven / Gradle / Ivy
/**
* Copyright (c) 2008, http://www.snakeyaml.org
*
* 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;
abstract public class GenericProperty extends Property {
private 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;
}
}