/
EntityDocumentProcessorBroker.java
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/
EntityDocumentProcessorBroker.java
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package org.wikidata.wdtk.datamodel.interfaces;
/*
* #%L
* Wikidata Toolkit Data Model
* %%
* Copyright (C) 2014 Wikidata Toolkit Developers
* %%
* 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.
* #L%
*/
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
/**
* Simple broker implementation of {@link EntityDocumentProcessor} which
* distributes entity documents to multiple registered listeners.
*
* @author Markus Kroetzsch
*
*/
public class EntityDocumentProcessorBroker implements EntityDocumentProcessor {
final List<EntityDocumentProcessor> entityDocumentProcessors = new ArrayList<EntityDocumentProcessor>();
final HashSet<EntityDocumentProcessor> entityDocumentProcessorRegistry = new HashSet<>();
/**
* Registers a listener which will be called for all entity documents that
* are processed. The method avoids duplicates in the sense that the exact
* same object cannot be registered twice.
*
* @param entityDocumentProcessor
* the listener to register
*/
public void registerEntityDocumentProcessor(
EntityDocumentProcessor entityDocumentProcessor) {
if (!this.entityDocumentProcessorRegistry
.contains(entityDocumentProcessor)) {
this.entityDocumentProcessors.add(entityDocumentProcessor);
this.entityDocumentProcessorRegistry.add(entityDocumentProcessor);
}
}
@Override
public void processItemDocument(ItemDocument itemDocument) {
for (EntityDocumentProcessor entityDocumentProcessor : this.entityDocumentProcessors) {
entityDocumentProcessor.processItemDocument(itemDocument);
}
}
@Override
public void processPropertyDocument(PropertyDocument propertyDocument) {
for (EntityDocumentProcessor entityDocumentProcessor : this.entityDocumentProcessors) {
entityDocumentProcessor.processPropertyDocument(propertyDocument);
}
}
}