/*
 * Licensed Materials - Property of Rogue Wave Software, Inc. 
 * © Copyright Rogue Wave Software, Inc. 2014, 2017 
 * © Copyright IBM Corp. 2009, 2014
 * © Copyright ILOG 1996, 2009
 * All Rights Reserved.
 *
 * Note to U.S. Government Users Restricted Rights:
 * The Software and Documentation were developed at private expense and
 * are "Commercial Items" as that term is defined at 48 CFR 2.101,
 * consisting of "Commercial Computer Software" and
 * "Commercial Computer Software Documentation", as such terms are
 * used in 48 CFR 12.212 or 48 CFR 227.7202-1 through 227.7202-4,
 * as applicable.
 */
package hitmap;

import java.util.*;

import org.w3c.dom.*;

import ilog.views.chart.data.IlvDataSet;
import ilog.views.chart.data.xml.IlvXMLPropertyReader;

/**
 * An <code>IlvXMLPropertyReader</code> implementation that reads the <code>hrefs</code> property.
 * The property should be expressed as a sequence of hypertext references (hrefs) separated by a ;.
 */
class HREFPropertyReader implements IlvXMLPropertyReader
{
    /** The <code>hrefs</code> property element tag. */
    public static String HREFS_TAG = "hrefs";

    /**
     * Reads the specified property element. This method reads an <code>hrefs</code>
     * element associated with a series and stores its contents in a <code>List</code>.
     */
    Override
    public Object readProperty(Element propertyElt)
    {
        Node child = propertyElt.getFirstChild();
        while (child != null) {
            if (child.getNodeType() == Node.ELEMENT_NODE &&
                child.getNodeName().equals(HREFS_TAG)) {
                Element hrefElt = (Element)child;
                StringTokenizer tokenizer =
                    new StringTokenizer(hrefElt.getFirstChild().getNodeValue(), ";\n\t ");
                List<String> hrefs = new LinkedList<String>();
                while (tokenizer.hasMoreTokens())
                    hrefs.add(tokenizer.nextToken());
                return hrefs;
            }
            child = child.getNextSibling();
        }
        return null;
    }

    /**
     * Sets the property on the specified data set. This method sets the
     * <code>href</code>s <code>List</code> as a property of the specified data set.
     */
    Override
    public void setProperty(IlvDataSet dataSet,
                            String propertyName,
                            Object value)
    {
        dataSet.putProperty(HREFPropertyReader.HREFS_TAG, value, false);
    }

}