/*
* 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.dom;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.jxpath.ri.model.NodeIterator;
import org.apache.commons.jxpath.ri.model.NodePointer;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
/**
* An iterator of namespaces of a DOM Node.
*
* @author Dmitri Plotnikov
* @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
*/
public class DOMNamespaceIterator implements NodeIterator {
private NodePointer parent;
private List attributes;
private int position = 0;
/**
* Create a new DOMNamespaceIterator.
* @param parent parent pointer
*/
public DOMNamespaceIterator(NodePointer parent) {
this.parent = parent;
attributes = new ArrayList();
collectNamespaces(attributes, (Node) parent.getNode());
}
/**
* Collect namespaces from attribute nodes.
* @param attributes attribute list
* @param node target node
*/
private void collectNamespaces(List attributes, Node node) {
Node parent = node.getParentNode();
if (parent != null) {
collectNamespaces(attributes, parent);
}
if (node.getNodeType() == Node.DOCUMENT_NODE) {
node = ((Document) node).getDocumentElement();
}
if (node.getNodeType() == Node.ELEMENT_NODE) {
NamedNodeMap map = node.getAttributes();
int count = map.getLength();
for (int i = 0; i < count; i++) {
Attr attr = (Attr) map.item(i);
String prefix = DOMNodePointer.getPrefix(attr);
String name = DOMNodePointer.getLocalName(attr);
if ((prefix != null && prefix.equals("xmlns"))
|| (prefix == null && name.equals("xmlns"))) {
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;
}
String prefix = "";
Attr attr = (Attr) attributes.get(index);
String name = attr.getPrefix();
if (name != null && name.equals("xmlns")) {
prefix = DOMNodePointer.getLocalName(attr);
}
return new NamespacePointer(parent, prefix, attr.getValue());
}
public int getPosition() {
return position;
}
public boolean setPosition(int position) {
this.position = position;
return position >= 1 && position <= attributes.size();
}
}
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