/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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 General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package com.sun.tools.internal.xjc.reader.dtd.bindinfo;

import org.w3c.dom.Element;

import org.xml.sax.Locator;

class DOMLocator {

    private static final String locationNamespace =

        "http://www.sun.com/xmlns/jaxb/dom-location";

    private static final String systemId    = "systemid";

    private static final String column      = "column";

    private static final String line        = "line";

    /** Sets the location information to a specified element. */

    public static void setLocationInfo( Element e, Locator loc ) {

        e.setAttributeNS(locationNamespace,"loc:"+systemId,loc.getSystemId());

        e.setAttributeNS(locationNamespace,"loc:"+column,Integer.toString(loc.getLineNumber()));

        e.setAttributeNS(locationNamespace,"loc:"+line,Integer.toString(loc.getColumnNumber()));

    }

    /**

     * Gets the location information from an element.

     *

     * <p>

     * For this method to work, the setLocationInfo method has to be

     * called before.

     */

    public static Locator getLocationInfo( final Element e ) {

        if(DOMUtil.getAttribute(e,locationNamespace,systemId)==null)

            return null;    // no location information

        return new Locator(){

            public int getLineNumber() {

                return Integer.parseInt(DOMUtil.getAttribute(e,locationNamespace,line));

            }

            public int getColumnNumber() {

                return Integer.parseInt(DOMUtil.getAttribute(e,locationNamespace,column));

            }

            public String getSystemId() {

                return DOMUtil.getAttribute(e,locationNamespace,systemId);

            }

            // we are not interested in PUBLIC ID.

            public String getPublicId() { return null; }

        };

    }

}