- /*
- * 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;
-
- import java.net.URL;
-
- import javax.xml.transform.Source;
- import javax.xml.transform.Transformer;
- import javax.xml.transform.TransformerFactory;
- import javax.xml.transform.dom.DOMResult;
-
- import org.apache.commons.jxpath.xml.DocumentContainer;
- import org.w3c.dom.Document;
-
- /**
- * An XML document container reads and parses XML only when it is
- * accessed. JXPath traverses Containers transparently -
- * you use the same paths to access objects in containers as you
- * do to access those objects directly. You can create
- * XMLDocumentContainers for various XML documents that may or
- * may not be accessed by XPaths. If they are, they will be automatically
- * read, parsed and traversed. If they are not - they won't be
- * read at all.
- *
- * @deprecated 1.1 Please use org.apache.commons.jxpath.xml.DocumentContainer
- *
- * @author Dmitri Plotnikov
- * @version $Revision: 1.11 $ $Date: 2004/02/29 14:17:42 $
- */
- public class XMLDocumentContainer implements Container {
-
- private DocumentContainer delegate;
- private Object document;
- private URL xmlURL;
- private Source source;
- private String parser;
-
- /**
- * @param URL is a URL for an XML file. Use getClass().getResource
- * (resourceName) to load XML from a resource file.
- */
- public XMLDocumentContainer(URL xmlURL) {
- delegate = new DocumentContainer(xmlURL);
- }
-
- public XMLDocumentContainer(Source source) {
- this.source = source;
- if (source == null) {
- throw new RuntimeException("Source is null");
- }
- }
-
- /**
- * Reads XML, caches it internally and returns the Document.
- */
- public Object getValue() {
- if (document == null) {
- try {
- if (source != null) {
- DOMResult result = new DOMResult();
- Transformer trans =
- TransformerFactory.newInstance().newTransformer();
- trans.transform(source, result);
- document = (Document) result.getNode();
- }
- else {
- document = delegate.getValue();
- }
- }
- catch (Exception ex) {
- throw new JXPathException(
- "Cannot read XML from: "
- + (xmlURL != null
- ? xmlURL.toString()
- : (source != null
- ? source.getSystemId()
- : "<<undefined source>>")),
- ex);
- }
- }
- return document;
- }
-
- /**
- * Throws an UnsupportedOperationException
- */
- public void setValue(Object value) {
- throw new UnsupportedOperationException();
- }
- }