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/**
 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
 *
 * 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.jbpm.bpmn2.xml;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;

import org.drools.core.xml.BaseAbstractHandler;
import org.drools.core.xml.ExtensibleXmlParser;
import org.drools.core.xml.Handler;
import org.jbpm.bpmn2.core.*;
import org.jbpm.bpmn2.core.Error;
import org.jbpm.compiler.xml.ProcessBuildData;
import org.jbpm.ruleflow.core.RuleFlowProcess;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

/**
 * This class isn't currently used because we don't really check thrown or caught event content 
 * (itemDefiniton references) to see if it matches the definition in the process. 
 * 
 * 

In fact, at this moment, the whole <signal> element is ignored because that (specifying * event content) is it's only function. * *

This handler is just here for two reasons:
    *
  1. So we can process <signal> elements in process definitions
  2. *
  3. When we do end up actively supporting event content, we'll need the functionality in this class
  4. *
*/ public class SignalHandler extends BaseAbstractHandler implements Handler { @SuppressWarnings("unchecked") public SignalHandler() { if ((this.validParents == null) && (this.validPeers == null)) { this.validParents = new HashSet(); this.validParents.add(Definitions.class); this.validPeers = new HashSet(); this.validPeers.add(null); this.validPeers.add(ItemDefinition.class); this.validPeers.add(Message.class); this.validPeers.add(Interface.class); this.validPeers.add(Escalation.class); this.validPeers.add(Error.class); this.validPeers.add(Signal.class); this.validPeers.add(DataStore.class); this.validPeers.add(RuleFlowProcess.class); this.allowNesting = false; } } @SuppressWarnings("unchecked") public Object start(final String uri, final String localName, final Attributes attrs, final ExtensibleXmlParser parser) throws SAXException { parser.startElementBuilder(localName, attrs); String id = attrs.getValue("id"); String name = attrs.getValue("name"); String structureRef = attrs.getValue("structureRef"); ProcessBuildData buildData = (ProcessBuildData) parser.getData(); Map signals = (Map) buildData.getMetaData("Signals"); if (signals == null) { signals = new HashMap(); buildData.setMetaData("Signals", signals); } Signal s = new Signal(id, structureRef, name); signals.put(id, s); return s; } public Object end(final String uri, final String localName, final ExtensibleXmlParser parser) throws SAXException { parser.endElementBuilder(); return parser.getCurrent(); } public Class generateNodeFor() { return Error.class; } }




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