org.semarglproject.sink.Pipe Maven / Gradle / Ivy
/**
* Copyright 2012-2013 the Semargl contributors. See AUTHORS for more details.
*
* 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 org.semarglproject.sink;
import org.semarglproject.rdf.ParseException;
/**
* Base class for pipeline procecessing blocks with one source and one sink.
* @param class of output sink
*/
public abstract class Pipe implements DataSink {
protected final S sink;
protected Pipe(S sink) {
this.sink = sink;
}
@Override
public void startStream() throws ParseException {
sink.startStream();
}
@Override
public void endStream() throws ParseException {
sink.endStream();
}
@Override
public final boolean setProperty(String key, Object value) {
boolean sinkResult = false;
if (sink != null) {
sinkResult = sink.setProperty(key, value);
}
return setPropertyInternal(key, value) || sinkResult;
}
protected abstract boolean setPropertyInternal(String key, Object value);
}