| /* |
| * 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.aae.controller; |
| |
| import org.apache.uima.analysis_engine.AnalysisEngineProcessException; |
| import org.apache.uima.cas.AbstractCas; |
| import org.apache.uima.cas.CAS; |
| 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.FlowController_ImplBase; |
| import org.apache.uima.flow.SimpleStep; |
| import org.apache.uima.flow.Step; |
| import org.apache.uima.resource.ResourceInitializationException; |
| |
| public class FlowControllerImpl extends FlowController_ImplBase { |
| String[] mSequence; |
| |
| public FlowControllerImpl() { |
| |
| } |
| |
| public FlowControllerImpl(FlowControllerContext fcContext) throws ResourceInitializationException { |
| super.initialize(fcContext); |
| } |
| |
| public void setKeys(String[] keys) { |
| mSequence = keys; |
| } |
| |
| public void init() throws Exception { |
| |
| } |
| |
| public Flow computeFlow(AbstractCas arg0) throws AnalysisEngineProcessException { |
| return new FixedFlowObject(0); |
| } |
| |
| public Class getRequiredCasInterface() { |
| return null; |
| } |
| |
| class FixedFlowObject extends CasFlow_ImplBase { |
| private int currentStep; |
| |
| private boolean wasSegmented = false; |
| |
| public FixedFlowObject(int startStep) { |
| currentStep = startStep; |
| } |
| |
| public Step next() throws AnalysisEngineProcessException { |
| if (currentStep >= mSequence.length) { |
| return new FinalStep(); // this CAS has finished the sequence |
| } |
| // If CAS was segmented, do not continue with flow. The individual segments |
| // are processed further but the original CAS is not. |
| // TODO: should be configurable. |
| if (wasSegmented) { |
| return new FinalStep(); |
| } |
| |
| // otherwise, we just send the CAS to the next AE in sequence. |
| return new SimpleStep(mSequence[currentStep++]); |
| } |
| |
| public Flow newCasProduced(CAS newCas, String producedBy) throws AnalysisEngineProcessException { |
| // record that the input CAS has been segmented (affects its subsequent flow) |
| wasSegmented = true; |
| // start the new output CAS from the next node after the CasMultiplier that produced it |
| int i = 0; |
| while (!mSequence[i].equals(producedBy)) |
| i++; |
| return new FixedFlowObject(i + 1); |
| } |
| } |
| |
| } |