/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2004-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*/
package org.geotools.xml.handlers.xsi;
import java.net.URI;
import org.geotools.xml.XSIElementHandler;
import org.geotools.xml.schema.Element;
import org.geotools.xml.schema.ElementGrouping;
import org.geotools.xml.schema.Group;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
/**
* GroupHandler purpose.
*
* <p>
* Representa a 'group' element
* </p>
*
* @author dzwiers, Refractions Research, Inc. http://www.refractions.net
* @author $Author:$ (last modification)
*
*
* @source $URL$
* @version $Id$
*/
public class GroupHandler extends ElementGroupingHandler {
/** 'group' */
public final static String LOCALNAME = "group";
private static int offset = 0;
private String id;
private String name;
private String ref = null;
private int maxOccurs = 1;
private int minOccurs = 1;
private ElementGroupingHandler child; // one of 'all', 'choice', or 'sequence'
private int hashCodeOffset = getOffset();
private DefaultGroup cache = null;
/*
* helper for hashCode()
*/
private static int getOffset() {
return offset++;
}
/**
* @see java.lang.Object#hashCode()
*/
public int hashCode() {
return (LOCALNAME.hashCode() * ((name == null) ? 1 : name.hashCode()))
+ hashCodeOffset;
}
/**
* @see org.geotools.xml.XSIElementHandler#getHandler(java.lang.String,
* java.lang.String)
*/
public XSIElementHandler getHandler(String namespaceURI, String localName)
throws SAXException {
if (SchemaHandler.namespaceURI.equalsIgnoreCase(namespaceURI)) {
// child types
//
// all
if (AllHandler.LOCALNAME.equalsIgnoreCase(localName)) {
AllHandler sth = new AllHandler();
if (child == null) {
child = sth;
} else {
throw new SAXNotRecognizedException(LOCALNAME
+ " may only have one child.");
}
return sth;
}
// choice
if (ChoiceHandler.LOCALNAME.equalsIgnoreCase(localName)) {
ChoiceHandler sth = new ChoiceHandler();
if (child == null) {
child = sth;
} else {
throw new SAXNotRecognizedException(LOCALNAME
+ " may only have one child.");
}
return sth;
}
// sequence
if (SequenceHandler.LOCALNAME.equalsIgnoreCase(localName)) {
SequenceHandler sth = new SequenceHandler();
if (child == null) {
child = sth;
} else {
throw new SAXNotRecognizedException(LOCALNAME
+ " may only have one child.");
}
return sth;
}
}
return null;
}
/**
* @see org.geotools.xml.XSIElementHandler#startElement(java.lang.String,
* java.lang.String, org.xml.sax.Attributes)
*/
public void startElement(String namespaceURI, String localName,
Attributes atts){
id = atts.getValue("", "id");
if (id == null) {
id = atts.getValue(namespaceURI, "id");
}
String max = atts.getValue("", "maxOccurs");
if (max == null) {
max = atts.getValue(namespaceURI, "maxOccurs");
}
String min = atts.getValue("", "minOccurs");
if (min == null) {
min = atts.getValue(namespaceURI, "minOccurs");
}
name = atts.getValue("", "name");
if (name == null || "".equals(name)) {
name = atts.getValue(namespaceURI, "name");
}
ref = atts.getValue("", "ref");
if (ref == null || "".equals(ref)) {
ref = atts.getValue(namespaceURI, "ref"); // mutally exclusive with
}
// name ...
if ((min != null) && !"".equalsIgnoreCase(min)) {
minOccurs = Integer.parseInt(min);
}
if ((max != null) && !"".equalsIgnoreCase(max)) {
if ("unbounded".equalsIgnoreCase(max)) {
maxOccurs = ElementGrouping.UNBOUNDED;
} else {
maxOccurs = Integer.parseInt(max);
}
}
}
/**
* @see org.geotools.xml.XSIElementHandler#getLocalName()
*/
public String getLocalName() {
return LOCALNAME;
}
/**
* <p>
* returns the group's name
* </p>
*
*/
public String getName() {
return name;
}
/**
* @see org.geotools.xml.XSIHandlers.ElementGroupingHandler#compress(org.geotools.xml.XSIHandlers.SchemaHandler)
*/
protected ElementGrouping compress(SchemaHandler parent)
throws SAXException {
synchronized(this){
if (cache != null)
return cache;
cache = new DefaultGroup();
}
cache.id = this.id;
cache.name = this.name;
cache.namespace = parent.getTargetNamespace();
cache.min = this.minOccurs;
cache.max = this.maxOccurs;
cache.child = (this.child == null) ? null
: this.child.compress(parent); // deal with all/choice/sequnce
if (ref != null) {
Group g = parent.lookUpGroup(ref);
if (g != null) {
if ((id == null) || "".equalsIgnoreCase(id)) {
id = g.getId();
}
cache.min = g.getMinOccurs();
cache.max = g.getMaxOccurs();
cache.name = g.getName();
cache.namespace = g.getNamespace();
cache.child = (g.getChild() == null) ? cache.child : g.getChild();
}
}
child = null;
return cache;
}
/**
* @see org.geotools.xml.XSIElementHandler#getHandlerType()
*/
public int getHandlerType() {
return DEFAULT;
}
/**
* @see org.geotools.xml.XSIElementHandler#endElement(java.lang.String,
* java.lang.String)
*/
public void endElement(String namespaceURI, String localName){
// do nothing
}
protected static class DefaultGroup implements Group{
protected ElementGrouping child;
protected String id;
protected int min,max;
protected String name;
protected URI namespace;
/**
* TODO summary sentence for getChild ...
*
* @see org.geotools.xml.schema.Group#getChild()
*/
public ElementGrouping getChild() {
return child;
}
/**
* TODO summary sentence for getId ...
*
* @see org.geotools.xml.schema.Group#getId()
*/
public String getId() {
return id;
}
/**
* TODO summary sentence for getMaxOccurs ...
*
* @see org.geotools.xml.schema.Group#getMaxOccurs()
*/
public int getMaxOccurs() {
return max;
}
/**
* TODO summary sentence for getMinOccurs ...
*
* @see org.geotools.xml.schema.Group#getMinOccurs()
*/
public int getMinOccurs() {
return min;
}
/**
* TODO summary sentence for getName ...
*
* @see org.geotools.xml.schema.Group#getName()
*/
public String getName() {
return name;
}
/**
* TODO summary sentence for getNamespace ...
*
* @see org.geotools.xml.schema.Group#getNamespace()
*/
public URI getNamespace() {
return namespace;
}
/**
* TODO summary sentence for getGrouping ...
*
* @see org.geotools.xml.schema.ElementGrouping#getGrouping()
*/
public int getGrouping() {
return GROUP;
}
/**
* TODO summary sentence for findChildElement ...
*
* @see org.geotools.xml.schema.ElementGrouping#findChildElement(java.lang.String)
* @param arg1
*/
public Element findChildElement( String arg1 ) {
return child==null?null:child.findChildElement(arg1);
}
public Element findChildElement(String localName, URI namespaceURI) {
return child==null?null:child.findChildElement(localName, namespaceURI);
}
}
}