org.jbpm.bpmn2.xml.InMessageRefHandler Maven / Gradle / Ivy

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/*
 * Copyright 2021 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.HashSet;
import java.util.Map;

import org.jbpm.bpmn2.core.Interface.Operation;
import org.jbpm.bpmn2.core.Message;
import org.jbpm.compiler.xml.Handler;
import org.jbpm.compiler.xml.Parser;
import org.jbpm.compiler.xml.ProcessBuildData;
import org.jbpm.compiler.xml.core.BaseAbstractHandler;
import org.w3c.dom.Element;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

public class InMessageRefHandler extends BaseAbstractHandler implements Handler {

    @SuppressWarnings("unchecked")
    public InMessageRefHandler() {
        if ((this.validParents == null) && (this.validPeers == null)) {
            this.validParents = new HashSet();
            this.validParents.add(Operation.class);

            this.validPeers = new HashSet();
            this.validPeers.add(null);

            this.allowNesting = false;
        }
    }

    public Object start(final String uri, final String localName,
            final Attributes attrs, final Parser parser)
            throws SAXException {
        parser.startElementBuilder(localName, attrs);
        return null;
    }

    @SuppressWarnings("unchecked")
    public Object end(final String uri, final String localName,
            final Parser parser) throws SAXException {
        Element element = parser.endElementBuilder();
        String messageId = element.getTextContent();
        Map messages = (Map) ((ProcessBuildData) parser.getData()).getMetaData("Messages");
        if (messages == null) {
            throw new ProcessParsingValidationException("No messages found");
        }
        Operation operation = (Operation) parser.getParent();
        Message message = messages.get(messageId);
        if (message != null) {
            operation.setMessage(message);
        }

        return parser.getCurrent();
    }

    public Class generateNodeFor() {
        return Message.class;
    }

}