SingleCloseImageProxy.java
/*
* Copyright (C) 2019 The Android Open Source Project
*
* 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 androidx.camera.core;
import androidx.annotation.GuardedBy;
/** A {@link ImageProxy} which filters out redundant calls to {@link #close()}. */
final class SingleCloseImageProxy extends ForwardingImageProxy {
@GuardedBy("this")
private boolean mClosed = false;
/**
* Creates a new instances which wraps the given image.
*
* @param image to wrap
* @return new {@link SingleCloseImageProxy} instance
*/
SingleCloseImageProxy(ImageProxy image) {
super(image);
}
@Override
public synchronized void close() {
if (!mClosed) {
mClosed = true;
super.close();
}
}
}