/*
* 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 java.util.LinkedList;
import java.util.List;
import org.geotools.xml.XSIElementHandler;
import org.geotools.xml.schema.Element;
import org.geotools.xml.schema.ElementGrouping;
import org.geotools.xml.schema.Sequence;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
/**
* SequenceHandler purpose.
*
* <p>
* represents a sequence element
* </p>
*
* @author dzwiers, Refractions Research, Inc. http://www.refractions.net
* @author $Author:$ (last modification)
*
* @source $URL$
* @version $Id$
*/
public class SequenceHandler extends ElementGroupingHandler {
/** 'sequence' */
public final static String LOCALNAME = "sequence";
private String id;
private int maxOccurs;
private int minOccurs;
private List children; // element, group, choice, sequence or any
private DefaultSequence cache = null;
/**
* @see java.lang.Object#hashCode()
*/
public int hashCode() {
return (LOCALNAME.hashCode() * ((id == null) ? 1 : id.hashCode()))
+ ((children == null) ? 2 : children.hashCode());
}
/**
* @see org.geotools.xml.XSIElementHandler#getHandler(java.lang.String,
* java.lang.String)
*/
public XSIElementHandler getHandler(String namespaceURI, String localName){
logger.finest("Getting Handler for " + localName + " :: "
+ namespaceURI);
if (namespaceURI.equalsIgnoreCase(namespaceURI)) {
// child types
//
// any
if (AnyHandler.LOCALNAME.equalsIgnoreCase(localName)) {
if (children == null) {
children = new LinkedList();
}
AnyHandler ah = new AnyHandler();
children.add(ah);
return ah;
}
// choice
if (ChoiceHandler.LOCALNAME.equalsIgnoreCase(localName)) {
if (children == null) {
children = new LinkedList();
}
ChoiceHandler ah = new ChoiceHandler();
children.add(ah);
return ah;
}
// element
if (ElementTypeHandler.LOCALNAME.equalsIgnoreCase(localName)) {
if (children == null) {
children = new LinkedList();
}
ElementTypeHandler ah = new ElementTypeHandler();
children.add(ah);
return ah;
}
// group
if (GroupHandler.LOCALNAME.equalsIgnoreCase(localName)) {
if (children == null) {
children = new LinkedList();
}
GroupHandler ah = new GroupHandler();
children.add(ah);
return ah;
}
// sequence
if (LOCALNAME.equalsIgnoreCase(localName)) {
if (children == null) {
children = new LinkedList();
}
SequenceHandler ah = new SequenceHandler();
children.add(ah);
return ah;
}
}
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
id = atts.getValue("", "id");
if (id == null) {
id = atts.getValue(namespaceURI, "id");
}
// maxOccurs
String maxOccurs1 = atts.getValue("", "maxOccurs");
if (maxOccurs1 == null) {
maxOccurs1 = atts.getValue(namespaceURI, "maxOccurs");
}
// minOccurs
String minOccurs1 = atts.getValue("", "minOccurs");
if (minOccurs1 == null) {
minOccurs1 = atts.getValue(namespaceURI, "minOccurs");
}
if ((minOccurs1 != null) && !"".equalsIgnoreCase(minOccurs1)) {
this.minOccurs = Integer.parseInt(minOccurs1);
} else {
this.minOccurs = 1;
}
if ((maxOccurs1 != null) && !"".equalsIgnoreCase(maxOccurs1)) {
if ("unbounded".equalsIgnoreCase(maxOccurs1)) {
this.maxOccurs = ElementGrouping.UNBOUNDED;
} else {
this.maxOccurs = Integer.parseInt(maxOccurs1);
}
} else {
this.maxOccurs = 1;
}
}
/**
* @see org.geotools.xml.XSIElementHandler#getLocalName()
*/
public String getLocalName() {
return LOCALNAME;
}
/**
* @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 DefaultSequence();
}
cache.id = id;
cache.minOccurs = minOccurs;
cache.maxOccurs = maxOccurs;
logger.finest(id + " :: This Sequence has "
+ ((children == null) ? 0 : children.size()) + " children");
if (children != null) {
cache.children = new ElementGrouping[children.size()];
// TODO compress sequences here
// sequqnces can be inlined here.
for (int i = 0; i < cache.children.length; i++)
cache.children[i] = ((ElementGroupingHandler) children.get(i))
.compress(parent);
}
children = null;
id = null;
return cache;
}
/**
* @see org.geotools.xml.XSIElementHandler#getHandlerType()
*/
public int getHandlerType() {
return SEQUENCE;
}
/**
* @see org.geotools.xml.XSIElementHandler#endElement(java.lang.String,
* java.lang.String)
*/
public void endElement(String namespaceURI, String localName){
// do nothing
}
/**
* <p>
* Default implementation of a sequence for a parsed xml sequence
* </p>
*
* @author dzwiers
*
* @see Sequence
*/
private static class DefaultSequence implements Sequence {
// file visible avoids set* methods
ElementGrouping[] children;
String id;
int minOccurs;
int maxOccurs;
/**
* @see org.geotools.xml.xsi.ElementGrouping#findChildElement(java.lang.String)
*/
public Element findChildElement(String name) {
if (children == null) {
return null;
}
for (int i = 0; i < children.length; i++) {
Element t = children[i].findChildElement(name);
if (t != null) { // found it
return t;
}
}
return null;
}
/**
* @see org.geotools.xml.xsi.Sequence#getChildren()
*/
public ElementGrouping[] getChildren() {
return children;
}
/**
* @see org.geotools.xml.xsi.Sequence#getId()
*/
public String getId() {
return id;
}
/**
* @see org.geotools.xml.xsi.ElementGrouping#getMaxOccurs()
*/
public int getMaxOccurs() {
return maxOccurs;
}
/**
* @see org.geotools.xml.xsi.ElementGrouping#getMinOccurs()
*/
public int getMinOccurs() {
return minOccurs;
}
/**
* @see org.geotools.xml.xsi.ElementGrouping#getGrouping()
*/
public int getGrouping() {
return SEQUENCE;
}
public Element findChildElement(String localName, URI namespaceURI) {
if (children == null) {
return null;
}
for (int i = 0; i < children.length; i++) {
Element t = children[i].findChildElement(localName, namespaceURI);
if (t != null) { // found it
return t;
}
}
return null;
}
}
}