com.thebuzzmedia.exiftool.core.handlers.StopHandler Maven / Gradle / Ivy
/**
* Copyright 2011 The Buzz Media, LLC
* Copyright 2015 Mickael Jeanroy
*
* 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.thebuzzmedia.exiftool.core.handlers;
import com.thebuzzmedia.exiftool.process.OutputHandler;
/**
* Check if line means it is the end of the stream.
*
* End is detected if:
*
* - Line is {@code null}.
* - Output is strictly equals to {@code {ready}}.
*
*
* This handler is thread safe, stateless and is implemented as
* a singleton.
*/
public class StopHandler implements OutputHandler {
/**
* Singleton instance.
*/
private static final StopHandler INSTANCE = new StopHandler();
/**
* Get instance.
*
* @return Singleton instance.
*/
public static StopHandler stopHandler() {
return INSTANCE;
}
// Ensure non instantiation.
private StopHandler() {
}
@Override
public boolean readLine(String line) {
return line != null && !line.equals("{ready}");
}
}