/*
* 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 com.googlecode.openbeans;
import com.googlecode.openbeans.Encoder;
import com.googlecode.openbeans.Expression;
import com.googlecode.openbeans.PersistenceDelegate;
class StringPersistenceDelegate extends PersistenceDelegate {
@Override
protected Expression instantiate(Object oldInstance, Encoder out) {
String value = (String) oldInstance;
return new Expression(oldInstance, String.class,
"new", new Object[] { value }); //$NON-NLS-1$
}
@Override
/*
* It's unnecessary to do anything for initialization, because two mutatable
* strings are actually equivalent already.
*/
protected void initialize(Class<?> type, Object oldInstance,
Object newInstance, Encoder out) {
// do nothing
}
@Override
protected boolean mutatesTo(Object oldInstance, Object newInstance) {
if (oldInstance instanceof String && newInstance instanceof String) {
return newInstance.equals(oldInstance);
}
return super.mutatesTo(oldInstance, newInstance);
}
}