/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.uima.analysis_engine.impl;
import java.util.Set;
import org.apache.uima.analysis_engine.AnalysisEngineProcessException;
import org.apache.uima.cas.CAS;
import org.apache.uima.flow.CasFlowController_ImplBase;
import org.apache.uima.flow.CasFlow_ImplBase;
import org.apache.uima.flow.FinalStep;
import org.apache.uima.flow.Flow;
import org.apache.uima.flow.FlowControllerContext;
import org.apache.uima.flow.ParallelStep;
import org.apache.uima.flow.Step;
import org.apache.uima.resource.ResourceInitializationException;
/**
* FlowController for testing ParallelStep.
*/
public class ParallelFlowController extends CasFlowController_ImplBase {
public void initialize(FlowControllerContext aContext) throws ResourceInitializationException {
super.initialize(aContext);
}
/*
* (non-Javadoc)
*
* @see org.apache.uima.flow.CasFlowController_ImplBase#computeFlow(org.apache.uima.cas.CAS)
*/
public Flow computeFlow(CAS aCAS) throws AnalysisEngineProcessException {
ParallelFlowObject ffo = new ParallelFlowObject();
ffo.setCas(aCAS);
return ffo;
}
class ParallelFlowObject extends CasFlow_ImplBase {
private boolean done = false;
/**
* Create a new fixed flow starting at step <code>startStep</code> of the fixed sequence.
*
*/
public ParallelFlowObject() {
//do nothing
}
/*
* (non-Javadoc)
*
* @see org.apache.uima.flow.Flow#next()
*/
public Step next() throws AnalysisEngineProcessException {
if (!done) {
done = true;
Set keys = getContext().getAnalysisEngineMetaDataMap().keySet();
return new ParallelStep(keys);
}
else {
return new FinalStep();
}
}
/* (non-Javadoc)
* @see org.apache.uima.flow.CasFlow_ImplBase#newCasProduced(org.apache.uima.cas.CAS, java.lang.String)
*/
protected Flow newCasProduced(CAS newCas, String producedBy) throws AnalysisEngineProcessException {
//for this test, new segments don't continue in the flow
return new EmptyFlow();
}
}
class EmptyFlow extends CasFlow_ImplBase {
public Step next() {
return new FinalStep();
}
}
}