/*
* Copyright 2013 serso aka se.solovyev
*
* 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.
*
* ---------------------------------------------------------------------
* Contact details
*
* Email: se.solovyev@gmail.com
* Site: http://se.solovyev.org
*/
package org.solovyev.common;
import javax.annotation.Nonnull;
import javax.annotation.concurrent.GuardedBy;
public abstract class SynchronizedObject<D> {
@GuardedBy("mutex")
@Nonnull
protected final D delegate;
@Nonnull
protected final Object mutex;
protected SynchronizedObject(@Nonnull D delegate) {
this.delegate = delegate;
this.mutex = this;
}
protected SynchronizedObject(@Nonnull D delegate, @Nonnull Object mutex) {
this.delegate = delegate;
this.mutex = mutex;
}
// for manually synchronization it is allows to use mutex
@Nonnull
public Object getMutex() {
return mutex;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof SynchronizedObject)) {
return false;
}
final SynchronizedObject that = (SynchronizedObject) o;
synchronized (mutex) {
if (!delegate.equals(that.delegate)) {
return false;
}
}
return true;
}
@Override
public int hashCode() {
synchronized (mutex) {
return delegate.hashCode();
}
}
@Override
public String toString() {
synchronized (mutex) {
return delegate.toString();
}
}
}