/********************************************************************************
 * CruiseControl, a Continuous Integration Toolkit
 * Copyright (c) 2007, ThoughtWorks, Inc.
 * 200 E. Randolph, 25th Floor
 * Chicago, IL 60601 USA
 * 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 ThoughtWorks, Inc., CruiseControl, 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 REGENTS OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package net.sourceforge.cruisecontrol;

import java.util.Iterator;
import java.util.List;

import org.jdom.Attribute;
import org.jdom.Document;
import org.jdom.Element;

public class LogFileReader {
    
    private static final String INTERVAL = "interval";
    private final Document doc;

    public LogFileReader(Document doc) {
        this.doc = doc;
    }
    
    /**
     * Get the build interval from the log file.
     * If no build interval is found, then return 0.
     * 
     * @return the build interval in Seconds
     */
    public int getBuildInterval() {
        int buildInterval = 0;
        Document document = this.doc;
        //find the info element, 
        // then find a child property element with an attribute of interval
        // return the value attribute of this element
        Element infoElement = document.getRootElement().getChild("info");
        List children = infoElement.getChildren("property");
        
        for (Iterator iter = children.iterator(); iter.hasNext();) {
            Element child = (Element) iter.next();
            Attribute nameAttribute = child.getAttribute("name");
            if (nameAttribute != null
                    && INTERVAL.equals(nameAttribute.getValue())) {
                String value = child.getAttribute("value").getValue();
                buildInterval = Integer.parseInt(value);
            }
        }
        return buildInterval;
    }

}