org.apache.taverna.scufl2.translator.t2flow.defaultdispatchstack.LoopParser.java Source code

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Here is the source code for org.apache.taverna.scufl2.translator.t2flow.defaultdispatchstack.LoopParser.java

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package org.apache.taverna.scufl2.translator.t2flow.defaultdispatchstack;
/*
 *
 * 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.
 *
*/

import static org.apache.taverna.scufl2.translator.t2flow.T2FlowParser.ravenURI;

import java.net.URI;

import javax.xml.bind.JAXBException;

import org.apache.taverna.scufl2.api.configurations.Configuration;
import org.apache.taverna.scufl2.api.io.ReaderException;
import org.apache.taverna.scufl2.translator.t2flow.ParserState;
import org.apache.taverna.scufl2.translator.t2flow.T2FlowParser;
import org.apache.taverna.scufl2.translator.t2flow.defaultactivities.AbstractActivityParser;

import org.apache.taverna.scufl2.xml.t2flow.jaxb.Activity;
import org.apache.taverna.scufl2.xml.t2flow.jaxb.ConfigBean;
import org.apache.taverna.scufl2.xml.t2flow.jaxb.LoopConfig;
import org.apache.taverna.scufl2.xml.t2flow.jaxb.Property;

import com.fasterxml.jackson.databind.node.ObjectNode;

public class LoopParser extends AbstractActivityParser {
    /**
     * Expose some of the useful activity/config parser methods to LoopParser
     * with a different parser state.
     * <p>
     * TODO: Refactor T2FlowParser to avoid the need for this 
     */
    protected class ConditionalActivityParser extends T2FlowParser {
        public ConditionalActivityParser(ParserState origState) throws JAXBException {
            super();
            parserState.get().setCurrentProfile(origState.getCurrentProfile());
            parserState.get().setCurrentProcessor(origState.getCurrentProcessor());
        }

        @Override
        public org.apache.taverna.scufl2.api.activity.Activity parseActivity(Activity origActivity)
                throws ReaderException {
            org.apache.taverna.scufl2.api.activity.Activity parsed = super.parseActivity(origActivity);
            parserState.get().setCurrentActivity(parsed);
            return parsed;
        }

        @Override
        protected Configuration parseConfiguration(ConfigBean configBean) throws JAXBException, ReaderException {
            return super.parseConfiguration(configBean);
        }
    }

    private static final URI modelRavenURI = ravenURI.resolve("net.sf.taverna.t2.core/workflowmodel-impl/");
    private static final String className = "net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Loop";
    public static final URI scufl2Uri = URI
            .create("http://ns.taverna.org.uk/2010/scufl2/taverna/dispatchlayer/Loop");

    @Override
    public boolean canHandlePlugin(URI pluginURI) {
        String uriStr = pluginURI.toASCIIString();
        return uriStr.startsWith(modelRavenURI.toASCIIString()) && uriStr.endsWith(className);
    }

    @Override
    public URI mapT2flowRavenIdToScufl2URI(URI t2flowActivity) {
        return scufl2Uri;
    }

    @Override
    public Configuration parseConfiguration(T2FlowParser t2FlowParser, ConfigBean configBean,
            ParserState parserState) throws ReaderException {
        LoopConfig loopConfig = unmarshallConfig(t2FlowParser, configBean, "xstream", LoopConfig.class);

        final Configuration c = new Configuration();
        c.setType(scufl2Uri.resolve("Config"));

        ObjectNode json = (ObjectNode) c.getJson();

        json.put("runFirst", loopConfig.isRunFirst());

        for (Property prop : loopConfig.getProperties().getProperty())
            json.put(prop.getName(), prop.getValue());

        String conditionXml = loopConfig.getConditionXML();
        if (conditionXml == null)
            // activity is unconfigured (bug in T2). 
            // Return c only if there are properties beyond "runFirst"
            return json.size() > 1 ? c : null;
        Activity conditionActivity = unmarshallXml(parserState.getT2FlowParser(), conditionXml, Activity.class);
        try {
            ConditionalActivityParser internalParser = new ConditionalActivityParser(parserState);

            org.apache.taverna.scufl2.api.activity.Activity newActivity = internalParser
                    .parseActivity(conditionActivity);
            String name = parserState.getCurrentProcessor().getName() + "-loop";
            newActivity.setName(name);
            parserState.getCurrentProfile().getActivities().addWithUniqueName(newActivity);
            newActivity.setParent(parserState.getCurrentProfile());

            Configuration newConfig = internalParser.parseConfiguration(conditionActivity.getConfigBean());
            newConfig.setName(name);
            newConfig.setConfigures(newActivity);
            parserState.getCurrentProfile().getConfigurations().addWithUniqueName(newConfig);
            // URI uriActivity = uriTools.relativeUriForBean(newActivity, parserState.getCurrentProfile());
            json.put("conditionActivity", newActivity.getName());
        } catch (JAXBException e) {
            throw new ReaderException("Can't parse conditional loop activity", e);
        }
        return c;
    }
}