gov.nasa.ensemble.core.jscience.xml.XMLProfilesResource.java Source code

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Here is the source code for gov.nasa.ensemble.core.jscience.xml.XMLProfilesResource.java

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/*******************************************************************************
 * Copyright 2014 United States Government as represented by the
 * Administrator of the National Aeronautics and Space Administration.
 * All Rights Reserved.
 * 
 * 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 gov.nasa.ensemble.core.jscience.xml;

import gov.nasa.ensemble.common.logging.LogUtil;
import gov.nasa.ensemble.core.jscience.Profile;
import gov.nasa.ensemble.emf.resource.ProgressMonitorInputStream;

import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.time.StopWatch;
import org.apache.log4j.Logger;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.URIConverter;
import org.eclipse.emf.ecore.resource.impl.ResourceImpl;

public class XMLProfilesResource extends ResourceImpl {
    private static final List<String> SUPPORTED_EXTENSIONS = Arrays
            .asList(new String[] { "condition", "conditions", "resources", "resource", "profile", "profiles" });
    private static Logger LOGGER = Logger.getLogger(XMLProfilesResource.class);
    private static Map<Object, Object> DEFAULT_SAVE_OPTIONS = createSaveOptions();

    public XMLProfilesResource() {
        super();
        initialize();
    }

    public XMLProfilesResource(URI uri) {
        super(uri);
        initialize();
    }

    private void initialize() {
        setTrackingModification(true);
        this.isModified = false;
        defaultSaveOptions = DEFAULT_SAVE_OPTIONS;
    }

    private static Map<Object, Object> createSaveOptions() {
        Map<Object, Object> map = new LinkedHashMap<Object, Object>();
        map.put(Resource.OPTION_SAVE_ONLY_IF_CHANGED, Resource.OPTION_SAVE_ONLY_IF_CHANGED_MEMORY_BUFFER);
        return Collections.unmodifiableMap(map);
    }

    @Override
    @SuppressWarnings("unchecked")
    protected void doLoad(InputStream inputStream, Map<?, ?> options) {
        String extension = getURI().fileExtension();
        if (!SUPPORTED_EXTENSIONS.contains(extension.toLowerCase())) {
            LOGGER.warn("\"" + extension + "\" is not a standard extension for a ProfileResource.");
        }
        ProfilesParser parser = XMLProfileParser.getInstance();
        inputStream = ProgressMonitorInputStream.wrapInputStream(this, inputStream, options);
        StopWatch sw = new StopWatch();
        sw.start();
        try {
            parser.parse(getURI(), inputStream);
        } finally {
            IOUtils.closeQuietly(inputStream);
        }
        sw.stop();
        LOGGER.debug("Loaded profiles from " + getURI() + " in " + sw.toString());
        List<Profile> profiles = parser.getProfiles();
        if (profiles != null) {
            getContents().addAll(profiles);
        }
        setModified(false);
    }

    @Override
    public void save(Map<?, ?> options) throws IOException {
        if (isModified() || !URIConverter.INSTANCE.exists(getURI(), null)) {
            super.save(options);
        }
    }

    @Override
    public void doSave(OutputStream outputStream, Map<?, ?> options) {
        BufferedOutputStream bos = null;
        OutputStreamWriter osw = null;
        PrintWriter pw = null;
        ProfileWriter writer = null;
        String extension = getURI().fileExtension();
        if (!SUPPORTED_EXTENSIONS.contains(extension.toLowerCase())) {
            LOGGER.warn("\"" + extension + "\" is not a standard extension for a ProfileResource.");
        }
        try {
            bos = new BufferedOutputStream(outputStream);
            osw = new OutputStreamWriter(bos, "UTF-8");
            pw = new PrintWriter(osw);
            writer = new XMLProfileWriter(pw);
            List<Profile> profiles = new ArrayList<Profile>(getContents().size());
            for (EObject obj : getContents()) {
                if (obj instanceof Profile) {
                    profiles.add((Profile) obj);
                }
            }
            writer.writeProfiles(profiles, null, null);
            this.isModified = false;
        } catch (UnsupportedEncodingException e) {
            LogUtil.error(e);
        } finally {
            IOUtils.closeQuietly(pw);
            IOUtils.closeQuietly(osw);
            IOUtils.closeQuietly(bos);
        }
    }

    public List<Profile> getProfiles() {
        List<Profile> toRet = new ArrayList<Profile>(getContents().size());
        for (EObject obj : getContents()) {
            if (obj instanceof Profile)
                toRet.add((Profile) obj);
        }
        return toRet;
    }
}