/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.jxpath.ri.model.jdom;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.apache.commons.jxpath.ri.QName;
import org.apache.commons.jxpath.ri.model.NodeIterator;
import org.apache.commons.jxpath.ri.model.NodePointer;
import org.jdom.Attribute;
import org.jdom.Element;
import org.jdom.Namespace;
/**
* An iterator of attributes of a DOM Node.
*
* @author Dmitri Plotnikov
* @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
*/
public class JDOMAttributeIterator implements NodeIterator {
private NodePointer parent;
private List attributes;
private int position = 0;
/**
* Create a new JDOMAttributeIterator.
* @param parent pointer
* @param name test
*/
public JDOMAttributeIterator(NodePointer parent, QName name) {
this.parent = parent;
if (parent.getNode() instanceof Element) {
Element element = (Element) parent.getNode();
String prefix = name.getPrefix();
Namespace ns = null;
if (prefix != null) {
if (prefix.equals("xml")) {
ns = Namespace.XML_NAMESPACE;
}
else {
String uri = parent.getNamespaceResolver().getNamespaceURI(prefix);
if (uri != null) {
ns = Namespace.getNamespace(prefix, uri);
}
if (ns == null) {
// TBD: no attributes
attributes = Collections.EMPTY_LIST;
return;
}
}
}
else {
ns = Namespace.NO_NAMESPACE;
}
String lname = name.getName();
if (!lname.equals("*")) {
attributes = new ArrayList();
Attribute attr = element.getAttribute(lname, ns);
if (attr != null) {
attributes.add(attr);
}
}
else {
attributes = new ArrayList();
List allAttributes = element.getAttributes();
for (int i = 0; i < allAttributes.size(); i++) {
Attribute attr = (Attribute) allAttributes.get(i);
if (ns == Namespace.NO_NAMESPACE
|| attr.getNamespace().equals(ns)) {
attributes.add(attr);
}
}
}
}
}
public NodePointer getNodePointer() {
if (position == 0) {
if (!setPosition(1)) {
return null;
}
position = 0;
}
int index = position - 1;
if (index < 0) {
index = 0;
}
return new JDOMAttributePointer(
parent,
(Attribute) attributes.get(index));
}
public int getPosition() {
return position;
}
public boolean setPosition(int position) {
if (attributes == null) {
return false;
}
this.position = position;
return position >= 1 && position <= attributes.size();
}
}
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