javaa.beans.PrimitiveWrapperPersistenceDelegate Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 javaa.beans;
import javaa.beans.Encoder;
import javaa.beans.Expression;
import javaa.beans.PersistenceDelegate;
/**
* A special internal PersistenceDelegate for wrapper classes of
* primitive types like int.
*
*/
class PrimitiveWrapperPersistenceDelegate extends PersistenceDelegate {
/*
* It's unnecessary to do anything for initialization, because two mutatable
* wrapper objects are actually equivalent already.
*/
@Override
protected void initialize(Class type, Object oldInstance,
Object newInstance, Encoder enc) {
// do nothing
}
/*
* Instantiates a wrapper object using the constructor taking one String
* parameter except for Character.
*/
@Override
protected Expression instantiate(Object oldInstance, Encoder enc) {
if (oldInstance instanceof Character) {
return new Expression(oldInstance, oldInstance.toString(),
"charAt", new Object[] { Integer.valueOf(0) }); //$NON-NLS-1$
}
return new Expression(oldInstance, oldInstance.getClass(),
"new", new Object[] { oldInstance //$NON-NLS-1$
.toString() });
}
/*
* Two wrapper objects are regarded mutatable if they are equal.
*/
@Override
protected boolean mutatesTo(Object o1, Object o2) {
if (null == o2) {
return false;
}
return o1.equals(o2);
}
}