com.sun.tools.xjc.reader.dtd.bindinfo.DOM4JLocator.java Source code

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/*
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 *
 * Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
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 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
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 * file and include the License file at packager/legal/LICENSE.txt.
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 * GPL Classpath Exception:
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 * Modifications:
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package com.sun.tools.xjc.reader.dtd.bindinfo;

import org.dom4j.Element;
import org.dom4j.QName;
import org.xml.sax.Locator;

class DOM4JLocator {
    private static final String locationNamespace = "http://www.sun.com/xmlns/jaxb/dom4j-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.addAttribute(QName.get(systemId, locationNamespace), loc.getSystemId());
        e.addAttribute(QName.get(column, locationNamespace), Integer.toString(loc.getLineNumber()));
        e.addAttribute(QName.get(line, locationNamespace), 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 (e.attribute(QName.get(systemId, locationNamespace)) == null)
            return null; // no location information

        return new Locator() {
            public int getLineNumber() {
                return Integer.parseInt(e.attributeValue(QName.get(line, locationNamespace)));
            }

            public int getColumnNumber() {
                return Integer.parseInt(e.attributeValue(QName.get(column, locationNamespace)));
            }

            public String getSystemId() {
                return e.attributeValue(QName.get(systemId, locationNamespace));
            }

            // we are not interested in PUBLIC ID.
            public String getPublicId() {
                return null;
            }
        };
    }
}