Application: gvSIG desktop » gvSIG data provider for GPE

package org.gvsig.xmlschema.prov.som.utils;

import javax.xml.namespace.QName;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

import org.gvsig.xmlschema.lib.api.som.IXSElement;

import org.gvsig.xmlschema.lib.api.som.IXSNode;

import org.gvsig.xmlschema.lib.api.som.IXSNodeList;

import org.gvsig.xmlschema.lib.api.utils.SchemaTags;

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

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

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program 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 for more details.

 *

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

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

 *

 * $Id: SchemaUtils.java 192 2007-11-26 08:49:01Z jpiera $

 * $Log$

 * Revision 1.2  2007/06/28 13:04:33  jorpiell

 * The Qname has been updated to the 1.5 JVM machine. The schema validation is made in the GPEWriterHandlerImplementor class

 *

 * Revision 1.1  2007/06/14 16:15:03  jorpiell

 * builds to create the jars generated and add the schema code to the libGPEProject

 *

 * Revision 1.1  2007/06/14 13:50:07  jorpiell

 * The schema jar name has been changed

 *

 * Revision 1.6  2007/06/08 13:00:40  jorpiell

 * Add the targetNamespace to the file

 *

 * Revision 1.5  2007/06/08 07:31:20  jorpiell

 * Add the euroRoadS test

 *

 * Revision 1.4  2007/06/08 06:55:05  jorpiell

 * Fixed some bugs

 *

 * Revision 1.3  2007/05/30 12:50:53  jorpiell

 * Refactoring of some duplicated methods

 *

 * Revision 1.2  2007/05/30 12:25:48  jorpiell

 * Add the element collection

 *

 * Revision 1.1  2007/05/25 11:55:00  jorpiell

 * First update

 *

 *

 */

/**

 * Some utils to manage xml schemas

 * @author Jorge Piera LLodr? (jorge.piera@iver.es)

 */

public class SchemaUtils {

        /**

         * Compare a DOM nod3 by name

         * @param n

         * DOM node

         * @param namespace

         * Node namespace

         * @param tagName

         * Node name

         * @return

         * <code>true</code> if the node has this name

         */

        public static boolean matches(IXSNode n, String namespace, String tagName){

                String nodeName = n.getNodeName().substring(n.getNodeName().indexOf(":")+1, n.getNodeName().length());

                int index = n.getNodeName().indexOf(":");

                String nodeNSURI = null;

                if (index > 0){

                        nodeNSURI = n.getNodeName().substring(0,n.getNodeName().indexOf(":"));

                }

                if (nodeNSURI == null){

                        return objNullEq(tagName.toUpperCase(), nodeName.toUpperCase());

                }

                return objNullEq(nodeNSURI.toUpperCase(), namespace.toUpperCase()) &&

                        objNullEq(tagName.toUpperCase(), nodeName.toUpperCase());

        }

        /**

         * Determines if two QNames are equal

         * @param qname1

         * First qname to compare

         * @param qname2

         * Second qname to compare

         * @return

         * <code>true</code> or <code>false</code> according

         * to the above description.

         */

        public static boolean matches(QName qname1, QName qname2){

                return objNullEq(qname1.getNamespaceURI().toUpperCase(), qname2.getNamespaceURI().toUpperCase()) &&

                        objNullEq(qname1.getLocalPart().toUpperCase(), qname2.getLocalPart().toUpperCase());

        }

        /**

         * Search a Element by name

         * @param element

         * Parent element

         * @param childName

         * Element name to find

         * @return

         */

        public static IXSElement searchChildByTagName(IXSElement element, String childName){

                IXSNodeList nodeList = element.getChildNodes();

                for(int i = 0; i < nodeList.getLength(); i++){

                        IXSNode node = nodeList.item(i);

                        if(node.getNodeType() == Node.ELEMENT_NODE){

                                if (SchemaUtils.matches(node, SchemaTags.XS_NS, childName)){

                                        return (IXSElement)node;

                                }

                        }

                }

                return null;

        }        

        /**

         * Search a Element with a specified type and 

         * a specified attribute name

         * @param element

         * Parent element

         * @param tagName

         * Element tag name to find

         * @param targetNamespace

         * Namespace for the name attribute

         * @param attributeName

         * Value for the attribute name 

         * @return

         */

        public static IXSElement searchChildByAttributeName(IXSElement element, String tagName, String targetNamespace, String attributeName){

                IXSNodeList nodeList = element.getChildNodes();

                for(int i = 0; i < nodeList.getLength(); i++){

                        IXSNode node = nodeList.item(i);

                        if(node.getNodeType() == Node.ELEMENT_NODE){

                                if (SchemaUtils.matches(node, SchemaTags.XS_NS, tagName)){

                                        String name = ((Element)node).getAttribute(SchemaTags.NAME);

                                        if (objNullEq(name, attributeName)){

                                                return (IXSElement)node;

                                        }

                                }

                        }

                }

                return null;

        }        

        /**

         * Determines if two objects are equal.  

         * @param object1 

         * First object to compare.

         * @param object2 

         * Second object to compare.

         * @return 

         * <code>true</code> or <code>false</code> according

         * to the above description.

         */

        private static boolean objNullEq(Object object1, Object object2){

                if((object1 == null) && (object2 == null)){

                        return true;

                }

                if((object1 == null) && (object2 != null)){

                        return false;

                }

                if((object1 != null) && (object2 == null)){

                        return false;

                }

                return object1.equals(object2);

        }

        /**

         * Gets the local name for a qualified name

         * @param qualifiedName

         * @return

         */

        public static String getLocalName(String qualifiedName) {

                int index = qualifiedName.indexOf(":");

                if (index < 0){

                        return qualifiedName;

                }

                return qualifiedName.substring(index + 1, qualifiedName.length());

        }

}