/*
* Copyright (c) 2008-2012, Hazel Bilisim Ltd. All Rights Reserved.
*
* 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.hazelcast.impl.concurrentmap;
import com.hazelcast.nio.Data;
import static com.hazelcast.nio.IOUtil.toObject;
public class ValueHolder {
final Data data;
volatile Object value;
public ValueHolder(Data data) {
this.data = data;
}
public Data getData() {
return data;
}
@SuppressWarnings("NonPrivateFieldAccessedInSynchronizedContext")
public Object getValue() {
Object v = value;
if (v != null) return v;
//noinspection SynchronizeOnThis
synchronized (ValueHolder.this) {
value = toObject(data);
return value;
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ValueHolder that = (ValueHolder) o;
Object v = getValue();
return v.equals(that.getValue());
}
@Override
public int hashCode() {
final Object v = getValue();
return v != null ? v.hashCode() : Integer.MIN_VALUE;
}
}