001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019package org.apache.oozie.workflow.lite; 020 021import org.apache.oozie.workflow.WorkflowException; 022import org.apache.oozie.ErrorCode; 023 024 025//TODO javadoc 026public abstract class DecisionNodeHandler extends NodeHandler { 027 028 @Override 029 public final boolean enter(Context context) throws WorkflowException { 030 start(context); 031 return false; 032 } 033 034 @Override 035 public final String exit(Context context) throws WorkflowException { 036 end(context); 037 String signalValue = context.getSignalValue(); 038 if (context.getNodeDef().getTransitions().contains(signalValue)) { 039 return signalValue; 040 } 041 else { 042 throw new WorkflowException(ErrorCode.E0721, context.getNodeDef().getName(), signalValue); 043 } 044 } 045 046 public abstract void start(Context context) throws WorkflowException; 047 048 public abstract void end(Context context) throws WorkflowException; 049 050}