| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2000 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 1999, Lotus |
| * Development Corporation., http://www.lotus.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| package org.apache.xalan.lib; |
| |
| import org.w3c.dom.Node; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.DocumentFragment; |
| import org.w3c.dom.NodeList; |
| import org.w3c.dom.Text; |
| import org.w3c.dom.traversal.NodeIterator; |
| import org.apache.xpath.NodeSet; |
| import org.apache.xpath.objects.XObject; |
| import org.apache.xpath.objects.XBoolean; |
| import org.apache.xpath.objects.XNumber; |
| import org.apache.xpath.XPath; |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.DOMHelper; |
| import org.xml.sax.SAXNotSupportedException; |
| import java.util.Hashtable; |
| import java.util.StringTokenizer; |
| |
| import org.apache.xalan.extensions.ExpressionContext; |
| |
| /** |
| * <meta name="usage" content="general"/> |
| * This class contains many of the Xalan-supplied extensions. |
| * It is accessed by specifying a namespace URI as follows: |
| * <pre> |
| * xmlns:xalan="http://xml.apache.org/xalan" |
| * </pre> |
| */ |
| |
| public class Extensions { |
| |
| private Extensions() {} // Make sure class cannot be instantiated |
| |
| // /** |
| // * This method is an extension that implements as a Xalan extension |
| // * the node-set function also found in xt and saxon. |
| // * If the argument is a Result Tree Fragment, then <code>nodeset</code> |
| // * returns a node-set consisting of a single root node as described in |
| // * section 11.1 of the XSLT 1.0 Recommendation. If the argument is a |
| // * node-set, <code>nodeset</code> returns a node-set. If the argument |
| // * is a string, number, or boolean, then <code>nodeset</code> returns |
| // * a node-set consisting of a single root node with a single text node |
| // * child that is the result of calling the XPath string() function on the |
| // * passed parameter. If the argument is anything else, then a node-set |
| // * is returned consisting of a single root node with a single text node |
| // * child that is the result of calling the java <code>toString()</code> |
| // * method on the passed argument. |
| // * Most of the |
| // * actual work here is done in <code>MethodResolver</code> and |
| // * <code>XRTreeFrag</code>. |
| // * @param myProcessor Context passed by the extension processor |
| // * @param rtf Argument in the stylesheet to the nodeset extension function |
| // */ |
| // |
| // public static NodeSet nodeset(ExpressionContext myProcessor, Object rtf) { |
| // |
| // String textNodeValue; |
| // |
| // if (rtf instanceof NodeIterator) |
| // { |
| // return new NodeSet((NodeIterator) rtf); |
| // } |
| // else |
| // { |
| // if (rtf instanceof String) |
| // { |
| // textNodeValue = (String) rtf; |
| // } |
| // else if (rtf instanceof Boolean) |
| // { |
| // textNodeValue = new XBoolean(((Boolean) rtf).booleanValue()).str(); |
| // } |
| // else if (rtf instanceof Double) |
| // { |
| // textNodeValue = new XNumber(((Double) rtf).doubleValue()).str(); |
| // } |
| // else |
| // { |
| // textNodeValue = rtf.toString(); |
| // } |
| // Document myDoc = myProcessor.getContextNode().getOwnerDocument(); |
| // Text textNode = myDoc.createTextNode(textNodeValue); |
| // DocumentFragment docFrag = myDoc.createDocumentFragment(); |
| // docFrag.appendChild(textNode); |
| // return new NodeSet(docFrag); |
| // } |
| // } |
| // |
| // /** |
| // * Returns the intersection of two node-sets. |
| // * @param n1 NodeIterator for first node-set |
| // * @param ni2 NodeIterator for second node-set |
| // * @return a NodeSet containing the nodes in ni1 that are also |
| // * in ni2 |
| // */ |
| // public static NodeSet intersection(NodeIterator ni1, NodeIterator ni2) |
| // throws javax.xml.transform.TransformerException |
| // { |
| // NodeSet ns1 = new NodeSet(ni1); |
| // NodeSet ns2 = new NodeSet(ni2); |
| // NodeSet inter= new NodeSet(); |
| // inter.setShouldCacheNodes(true); |
| // for (int i=0; i < ns1.getLength(); i++) |
| // { |
| // Node n = ns1.elementAt(i); |
| // if(ns2.contains(n)) |
| // inter.addElement(n); |
| // } |
| // return inter; |
| // } |
| // |
| // /** |
| // * Returns the difference between two node-sets. |
| // * @param n1 NodeIterator for first node-set |
| // * @param ni2 NodeIterator for second node-set |
| // * @return a NodeSet containing the nodes in ni1 that are not |
| // * in ni2 |
| // */ |
| // public static NodeSet difference(NodeIterator ni1, NodeIterator ni2) |
| // throws javax.xml.transform.TransformerException |
| // { |
| // NodeSet ns1 = new NodeSet(ni1); |
| // NodeSet ns2 = new NodeSet(ni2); |
| // // NodeSet inter= new NodeSet(); |
| // NodeSet diff = new NodeSet(); |
| // diff.setShouldCacheNodes(true); |
| // for (int i = 0; i < ns1.getLength(); i++) |
| // { |
| // Node n = ns1.elementAt(i); |
| // if(!ns2.contains(n)) |
| // diff.addElement(n); |
| // } |
| // return diff; |
| // } |
| // |
| // /** |
| // * Returns node-set containing distinct string values. |
| // * @param ni NodeIterator for node-set |
| // * @return a NodeSet with nodes from ni containing distinct string values. |
| // * In other words, if more than one node in ni contains the same string value, |
| // * only include the first such node found. |
| // */ |
| // public static NodeSet distinct(NodeIterator ni) |
| // throws javax.xml.transform.TransformerException |
| // { |
| // NodeSet ns = new NodeSet(ni); |
| // NodeSet dist = new NodeSet(); |
| // dist.setShouldCacheNodes(true); |
| // Hashtable stringTable = new Hashtable(); |
| // for (int i = 0; i < ns.getLength(); i++) |
| // { |
| // Node n = ns.elementAt(i); |
| // String key = DOMHelper.getNodeData(n); |
| // if (!stringTable.containsKey(key)) |
| // { |
| // stringTable.put(key, n); |
| // dist.addElement(n); |
| // } |
| // } |
| // return dist; |
| // } |
| // |
| // /** |
| // * Returns true of both node-sets contain the same set of nodes. |
| // * @param n1 NodeIterator for first node-set |
| // * @param ni2 NodeIterator for second node-set |
| // * @return true if ni1 and ni2 contain exactly the same set of nodes. |
| // */ |
| // public static boolean hasSameNodes(NodeIterator ni1, NodeIterator ni2) |
| // { |
| // NodeSet ns1 = new NodeSet(ni1); |
| // NodeSet ns2 = new NodeSet(ni2); |
| // if (ns1.getLength() != ns2.getLength()) |
| // return false; |
| // for (int i = 0; i < ns1.getLength(); i++) |
| // { |
| // Node n = ns1.elementAt(i); |
| // if(!ns2.contains(n)) |
| // return false; |
| // } |
| // return true; |
| // } |
| // |
| // /** |
| // * Returns the result of evaluating the argument as a string containing |
| // * an XPath expression. Used where the XPath expression is not known until |
| // * run-time. The expression is evaluated as if the run-time value of the |
| // * argument appeared in place of the evaluate function call at compile time. |
| // * @param myContext an <code>ExpressionContext</code> passed in by the |
| // * extension mechanism. This must be an XPathContext. |
| // * @param xpathExtr The XPath expression to be evaluated. |
| // * @return the XObject resulting from evaluating the XPath |
| // */ |
| // public static XObject evaluate(ExpressionContext myContext, String xpathExpr) |
| // throws SAXNotSupportedException, Exception |
| // { |
| // if (myContext instanceof XPathContext) |
| // { |
| // try |
| // { |
| // XPathContext xctxt = (XPathContext) myContext; |
| // XPath dynamicXPath = new XPath(xpathExpr, |
| // xctxt.getSAXLocator(), |
| // xctxt.getNamespaceContext(), |
| // XPath.SELECT); |
| // return dynamicXPath.execute(xctxt, |
| // myContext.getContextNode(), |
| // xctxt.getNamespaceContext()); |
| // } |
| // catch (Exception e) |
| // { |
| // throw e; |
| // } |
| // } |
| // else |
| // throw new SAXNotSupportedException("Invalid context passed to evaluate " + myContext); |
| // } |
| // |
| // /** |
| // * Returns a NodeSet containing one text node for each token in the first argument. |
| // * Delimiters are specified in the second argument. |
| // * Tokens are determined by a call to <code>StringTokenizer</code>. |
| // * If the first argument is an empty string or contains only delimiters, the result |
| // * will be an empty NodeSet. |
| // * Contributed to XalanJ1 by <a href="mailto:benoit.cerrina@writeme.com">Benoit Cerrina</a>. |
| // * @param myContext an <code>ExpressionContext</code> passed in by the |
| // * extension mechanism. This must be an XPathContext. |
| // * @param toTokenize The string to be split into text tokens. |
| // * @param delims The delimiters to use. |
| // * @return a NodeSet as described above. |
| // * |
| // */ |
| // public static NodeSet tokenize(ExpressionContext myContext, String toTokenize, String delims) |
| // { |
| // Document lDoc = myContext.getContextNode().getOwnerDocument(); |
| // StringTokenizer lTokenizer = new StringTokenizer(toTokenize, delims); |
| // NodeSet resultSet = new NodeSet(); |
| // while (lTokenizer.hasMoreTokens()) |
| // { |
| // resultSet.addNode(lDoc.createTextNode(lTokenizer.nextToken())); |
| // } |
| // return resultSet; |
| //} |
| // |
| // /** |
| // * Returns a NodeSet containing one text node for each token in the first argument. |
| // * Delimiters are whitespace. That is, the delimiters that are used are tab (	), |
| // * linefeed (
), return (
), and space ( ). |
| // * Tokens are determined by a call to <code>StringTokenizer</code>. |
| // * If the first argument is an empty string or contains only delimiters, the result |
| // * will be an empty NodeSet. |
| // * Contributed to XalanJ1 by <a href="mailto:benoit.cerrina@writeme.com">Benoit Cerrina</a>. |
| // * @param myContext an <code>ExpressionContext</code> passed in by the |
| // * extension mechanism. This must be an XPathContext. |
| // * @param toTokenize The string to be split into text tokens. |
| // * @return a NodeSet as described above. |
| // * |
| // */ |
| // public static NodeSet tokenize(ExpressionContext myContext, String toTokenize) |
| // { |
| // return tokenize(myContext, toTokenize, " \t\n\r"); |
| // } |
| |
| } |
