/hazelcast/src/main/java/com/hazelcast/impl/concurrentmap/ValueHolder.java
https://bitbucket.org/gabral6_gmailcom/hazelcast · Java · 60 lines · 35 code · 9 blank · 16 comment · 9 complexity · c673a6764c9e91f4d4b123a57ede5875 MD5 · raw file
- /*
- * Copyright (c) 2008-2013, Hazelcast, Inc. 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;
- }
- }