- /*
- * Copyright 1999-2004 The Apache Software Foundation
- *
- * Licensed 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.HashSet;
- import java.util.List;
- import java.util.Set;
-
- import org.apache.commons.jxpath.ri.model.NodeIterator;
- import org.apache.commons.jxpath.ri.model.NodePointer;
- import org.jdom.Document;
- import org.jdom.Element;
- import org.jdom.Namespace;
-
- /**
- * An iterator of namespaces of a DOM Node.
- *
- * @author Dmitri Plotnikov
- * @version $Revision: 1.9 $ $Date: 2004/04/01 02:55:31 $
- */
- public class JDOMNamespaceIterator implements NodeIterator {
- private NodePointer parent;
- private List namespaces;
- private Set prefixes;
- private int position = 0;
-
- public JDOMNamespaceIterator(NodePointer parent) {
- this.parent = parent;
- Object node = parent.getNode();
- if (node instanceof Document) {
- node = ((Document)node).getRootElement();
- }
- if (node instanceof Element) {
- namespaces = new ArrayList();
- prefixes = new HashSet();
- collectNamespaces((Element) node);
- }
- }
-
- private void collectNamespaces(Element element) {
- Namespace ns = element.getNamespace();
- if (ns != null && !prefixes.contains(ns.getPrefix())) {
- namespaces.add(ns);
- prefixes.add(ns.getPrefix());
- }
- List others = element.getAdditionalNamespaces();
- for (int i = 0; i < others.size(); i++) {
- ns = (Namespace) others.get(i);
- if (ns != null && !prefixes.contains(ns.getPrefix())) {
- namespaces.add(ns);
- prefixes.add(ns.getPrefix());
- }
- }
- Object parent = element.getParent();
- if (parent instanceof Element) {
- collectNamespaces((Element)parent);
- }
- }
-
- public NodePointer getNodePointer() {
- if (position == 0) {
- if (!setPosition(1)) {
- return null;
- }
- position = 0;
- }
- int index = position - 1;
- if (index < 0) {
- index = 0;
- }
- Namespace ns = (Namespace) namespaces.get(index);
- return new JDOMNamespacePointer(parent, ns.getPrefix(), ns.getURI());
- }
-
- public int getPosition() {
- return position;
- }
-
- public boolean setPosition(int position) {
- if (namespaces == null) {
- return false;
- }
- this.position = position;
- return position >= 1 && position <= namespaces.size();
- }
- }