/*
* 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.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import org.geotools.xml.XSIElementHandler;
import org.geotools.xml.schema.Attribute;
import org.geotools.xml.schema.AttributeGroup;
import org.geotools.xml.schema.impl.AttributeGroupGT;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
/**
* AttributeGroupHandler purpose.
*
* <p>
* Represents an 'attributeGroup' element.
* </p>
*
* @author dzwiers, Refractions Research, Inc. http://www.refractions.net
* @author $Author:$ (last modification)
*
*
* @source $URL$
* @version $Id$
*/
public class AttributeGroupHandler extends XSIElementHandler {
/** 'attributeGroup' */
public final static String LOCALNAME = "attributeGroup";
private static int offset = 0;
private String id;
private String name;
private String ref;
private AnyAttributeHandler anyAttribute;
private List attrDecs;
private int hashCodeOffset = getOffset();
private AttributeGroup cache = null;
/*
* Helper method for hashCode
*/
private static int getOffset() {
return offset++;
}
/**
* @see java.lang.Object#hashCode()
*/
public int hashCode() {
return (LOCALNAME.hashCode() * ((id == null) ? 1 : id.hashCode()) * ((ref == null)
? 1 : ref.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
//
// attribute
if (AttributeHandler.LOCALNAME.equalsIgnoreCase(localName)) {
if (attrDecs == null) {
attrDecs = new LinkedList();
}
AttributeHandler ah = new AttributeHandler();
attrDecs.add(ah);
return ah;
}
// attributeGroup
if (AttributeGroupHandler.LOCALNAME.equalsIgnoreCase(localName)) {
if (attrDecs == null) {
attrDecs = new LinkedList();
}
AttributeGroupHandler ah = new AttributeGroupHandler();
attrDecs.add(ah);
return ah;
}
// anyAttribute
if (AnyAttributeHandler.LOCALNAME.equalsIgnoreCase(localName)) {
AnyAttributeHandler sth = new AnyAttributeHandler();
if (anyAttribute == null) {
anyAttribute = sth;
} else {
throw new SAXNotRecognizedException(LOCALNAME
+ " may only have one child declaration.");
}
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");
}
name = atts.getValue("", "name");
if (name == null) {
name = atts.getValue(namespaceURI, "name");
}
ref = atts.getValue("", "ref");
if (ref == null) {
ref = atts.getValue(namespaceURI, "ref");
}
}
/**
* @see org.geotools.xml.XSIElementHandler#getLocalName()
*/
public String getLocalName() {
return LOCALNAME;
}
/**
* returns the 'name' attribute
*
*/
public String getName() {
return name;
}
/**
* <p>
* Reduces the memory imprint returning a smaller object
* </p>
*
* @param parent
*
*
* @throws SAXException
*/
protected AttributeGroup compress(SchemaHandler parent)
throws SAXException {
if (cache != null) {
return cache;
}
String anyAttributeNamespace = (anyAttribute == null) ? null
: anyAttribute
.getNamespace();
Attribute[] attributes = null;
if (attrDecs != null) {
Iterator i = attrDecs.iterator();
HashSet h = new HashSet();
while (i.hasNext()) {
Object o = i.next();
if (o instanceof AttributeHandler) {
h.add(((AttributeHandler) o).compress(parent));
} else {
AttributeGroupHandler agh = (AttributeGroupHandler) o;
AttributeGroup ag = agh.compress(parent);
if ((ag != null) && (ag.getAttributes() != null)) {
Attribute[] aa = ag.getAttributes();
for (int j = 0; j < aa.length; j++)
h.add(aa[j]);
}
}
}
attributes = (Attribute[]) h.toArray(new Attribute[h.size()]);
}
String name1 = this.name;
if ((ref != null) && !"".equalsIgnoreCase(ref)) {
AttributeGroup ag = parent.lookUpAttributeGroup(ref);
if (ag == null) {
throw new SAXException("AttributeGroup '" + ref
+ "' was refered and not found");
}
name1 = ag.getName();
if ((anyAttribute == null)
|| "".equalsIgnoreCase(anyAttribute.getNamespace())) {
anyAttributeNamespace = ag.getAnyAttributeNameSpace();
}
if (attributes != null) {
throw new SAXException(
"Cannot have a ref and children for an AttributeGroup");
}
attributes = ag.getAttributes();
}
cache = new AttributeGroupGT(id, name1,
parent.getTargetNamespace(), attributes, anyAttributeNamespace);
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
}
}