ch.javasoft.xml.config.URLConfigParser.java Source code

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Here is the source code for ch.javasoft.xml.config.URLConfigParser.java

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/*
 * =============================================================================
 * Simplified BSD License, see http://www.opensource.org/licenses/
 * -----------------------------------------------------------------------------
 * Copyright (c) 2008-2009, Marco Terzer, Zurich, Switzerland
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright notice, 
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright 
 *       notice, this list of conditions and the following disclaimer in the 
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Swiss Federal Institute of Technology Zurich 
 *       nor the names of its contributors may be used to endorse or promote 
 *       products derived from this software without specific prior written 
 *       permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 * =============================================================================
 */
package ch.javasoft.xml.config;

import java.net.MalformedURLException;
import java.net.URL;

import org.dom4j.Element;

/**
 * The <tt>URLConfigParser</tt> parses the configuration for an URL.
 */
public class URLConfigParser {

    public static enum XmlElement implements XmlNode {
        url;
        public String getXmlName() {
            return name();
        }
    }

    public static enum XmlAttribute implements XmlNode {
        name;
        public String getXmlName() {
            return name();
        }
    }

    /**
     * Parses:
     * <pre>
       <url name="{work-dir}/{-out[2]}"/>               
     * </pre>
     */
    public static URL parseURL(Element urlElement) throws XmlConfigException {
        XmlUtil.checkExpectedElementName(urlElement, XmlElement.url);
        String urlName = urlElement.attributeValue(XmlAttribute.name.getXmlName());
        if (urlName == null) {
            throw new XmlConfigException(XmlAttribute.name.getXmlName() + " attribute missing for "
                    + XmlElement.url.getXmlName() + " element", urlElement);
        }
        try {
            return new URL(urlName);
        } catch (MalformedURLException ex) {
            throw new XmlConfigException("cannot parse url '" + urlName + "', e=" + ex, urlElement, ex);
        }
    }
}