org.deegree.console.metadata.ResourceProviderMetadata.java Source code

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Here is the source code for org.deegree.console.metadata.ResourceProviderMetadata.java

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//$HeadURL$
/*----------------------------------------------------------------------------
 This file is part of deegree, http://deegree.org/
 Copyright (C) 2001-2011 by:
 - Department of Geography, University of Bonn -
 and
 - lat/lon GmbH -
    
 This library is free software; you can redistribute it and/or modify it under
 the terms of the GNU Lesser General Public License as published by the Free
 Software Foundation; either version 2.1 of the License, or (at your option)
 any later version.
 This library is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 details.
 You should have received a copy of the GNU Lesser General Public License
 along with this library; if not, write to the Free Software Foundation, Inc.,
 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    
 Contact information:
    
 lat/lon GmbH
 Aennchenstr. 19, 53177 Bonn
 Germany
 http://lat-lon.de/
    
 Department of Geography, University of Bonn
 Prof. Dr. Klaus Greve
 Postfach 1147, 53001 Bonn
 Germany
 http://www.geographie.uni-bonn.de/deegree/
    
 e-mail: info@deegree.org
 ----------------------------------------------------------------------------*/
package org.deegree.console.metadata;

import static org.apache.commons.io.IOUtils.closeQuietly;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import org.deegree.workspace.ResourceProvider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 
 * @author <a href="mailto:schmitz@lat-lon.de">Andreas Schmitz</a>
 * @author last edited by: $Author$
 * 
 * @version $Revision$, $Date$
 */
public class ResourceProviderMetadata {

    private static Logger LOG = LoggerFactory.getLogger(ResourceProviderMetadata.class);

    private String wizardView = "/console/jsf/wizard";

    private final Map<String, ConfigExample> exampleNameToExample = new HashMap<String, ConfigExample>();

    private String name;

    private static final Map<String, ResourceProviderMetadata> rpClassNameToMd = new HashMap<String, ResourceProviderMetadata>();

    private ResourceProviderMetadata(ResourceProvider<?> rp) {
        String className = rp.getClass().getName();
        name = rp.getClass().getSimpleName();
        URL url = rp.getClass().getResource("/META-INF/console/resourceprovider/" + className);
        if (url != null) {
            LOG.debug("Loading resource provider metadata from '" + url + "'");
            Properties props = new Properties();
            InputStream is = null;
            try {
                is = url.openStream();
                props.load(is);
                if (props.containsKey("name")) {
                    name = props.getProperty("name").trim();
                }
                if (props.containsKey("wizard")) {
                    wizardView = props.getProperty("wizard").trim();
                }
                int i = 1;
                while (true) {
                    final String examplePrefix = "example" + i++ + "_";
                    String exampleLocation = props.getProperty(examplePrefix + "location");
                    if (exampleLocation == null) {
                        break;
                    }
                    exampleLocation = exampleLocation.trim();
                    final URL exampleUrl = this.getClass().getResource(exampleLocation);
                    if (exampleUrl == null) {
                        LOG.error("Configuration example file '" + exampleLocation + "' is missing on classpath.");
                        continue;
                    }
                    final String exampleName = getExampleDisplayName(props, examplePrefix, exampleLocation);
                    String exampleDescription = null;
                    if (props.containsKey(examplePrefix + "description")) {
                        exampleDescription = props.getProperty(examplePrefix + "description").trim();
                    }
                    ConfigExample example = new ConfigExample(exampleUrl, exampleName, exampleDescription);
                    exampleNameToExample.put(exampleName, example);
                }
            } catch (IOException e) {
                LOG.error(e.getMessage(), e);
            } finally {
                closeQuietly(is);
            }
        }
    }

    private String getExampleDisplayName(final Properties props, final String examplePrefix,
            final String exampleLocation) {
        if (props.containsKey(examplePrefix + "name")) {
            return props.getProperty(examplePrefix + "name").trim();
        }
        final int fileNameStart = exampleLocation.lastIndexOf("/") + 1;
        String exampleName = exampleLocation.substring(fileNameStart);
        final int fileNameEnd = exampleName.lastIndexOf('.');
        if (fileNameEnd != -1) {
            exampleName = exampleName.substring(0, fileNameEnd);
        }
        return exampleName;
    }

    public static synchronized ResourceProviderMetadata getMetadata(ResourceProvider<?> rp) {
        if (!rpClassNameToMd.containsKey(rp.getClass().getName())) {
            rpClassNameToMd.put(rp.getClass().getName(), new ResourceProviderMetadata(rp));
        }
        return rpClassNameToMd.get(rp.getClass().getName());
    }

    public String getName() {
        return name;
    }

    public Map<String, ConfigExample> getExamples() {
        return exampleNameToExample;
    }

    public String getConfigWizardView() {
        return wizardView;
    }
}