| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999 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.objects.XRTreeFrag; |
| |
| import org.apache.xpath.XPath; |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.DOMHelper; |
| import org.apache.xml.dtm.DTMIterator; |
| import org.apache.xml.dtm.ref.DTMNodeIterator; |
| import org.apache.xml.utils.XMLString; |
| |
| import org.xml.sax.SAXNotSupportedException; |
| |
| import java.util.Hashtable; |
| import java.util.StringTokenizer; |
| |
| import org.apache.xalan.extensions.ExpressionContext; |
| import org.apache.xalan.res.XSLMessages; |
| import org.apache.xalan.res.XSLTErrorResources; |
| import org.apache.xalan.xslt.EnvironmentCheck; |
| |
| import javax.xml.parsers.*; |
| |
| /** |
| * <meta name="usage" content="general"/> |
| * This class contains EXSLT common extension functions. |
| * It is accessed by specifying a namespace URI as follows: |
| * <pre> |
| * xmlns:exslt="http://exslt.org/xalan/common" |
| * </pre> |
| * |
| * The documentation for each function has been copied from the relevant |
| * EXSLT Implementer page. |
| * |
| * @see <a href="http://www.exslt.org/">EXSLT</a> |
| */ |
| public class ExsltCommon |
| { |
| /** |
| * The exsl:object-type function returns a string giving the type of the object passed |
| * as the argument. The possible object types are: 'string', 'number', 'boolean', |
| * 'node-set', 'RTF', or 'external'. |
| * |
| * Most XSLT object types can be coerced to each other without error. However, there are |
| * certain coercions that raise errors, most importantly treating anything other than a |
| * node set as a node set. Authors of utilities such as named templates or user-defined |
| * extension functions may wish to give some flexibility in the parameter and argument values |
| * that are accepted by the utility; the exsl:object-type function enables them to do so. |
| * |
| * The Xalan extensions MethodResolver converts 'object-type' to 'objectType'. |
| * |
| * @param obj The object to be typed. |
| * @return objectType 'string', 'number', 'boolean', 'node-set', 'RTF', or 'external'. |
| * |
| * @see <a href="http://www.exslt.org/">EXSLT</a> |
| */ |
| public static String objectType (Object obj) |
| { |
| if (obj instanceof String) |
| return "string"; |
| else if (obj instanceof Boolean) |
| return "boolean"; |
| else if (obj instanceof Number) |
| return "number"; |
| else if (obj instanceof DTMNodeIterator) |
| { |
| DTMIterator dtmI = ((DTMNodeIterator)obj).getDTMIterator(); |
| // Need to verify that OneStepIteratorForward is consistently the DTM iterator |
| // for rtfs and only rtfs. |
| if (dtmI.getClass().getName().equals("org.apache.xpath.axes.OneStepIteratorForward")) |
| return "RTF"; |
| else |
| return "node-set"; |
| } |
| else |
| return "external"; |
| } |
| |
| /** |
| * The exsl:node-set function converts a result tree fragment (which is what you get |
| * when you use the content of xsl:variable rather than its select attribute to give |
| * a variable value) into a node set. This enables you to process the XML that you create |
| * within a variable, and therefore do multi-step processing. |
| * |
| * You can also use this function to turn a string into a text node, which is helpful |
| * if you want to pass a string to a function that only accepts a node set. |
| * |
| * The Xalan extensions MethodResolver converts 'node-set' to 'nodeSet'. |
| * |
| * @param myProcesser is passed in by the Xalan extension processor |
| * @param rtf The result tree fragment to be converted to a node-set. |
| * |
| * @returns node-set with the contents of the result tree fragment. |
| * |
| * Note: Already implemented in the xalan namespace as nodeset. |
| * |
| * @see <a href="http://www.exslt.org/">EXSLT</a> |
| */ |
| public static NodeSet nodeSet(ExpressionContext myProcessor, Object rtf) |
| { |
| return Extensions.nodeset(myProcessor, rtf); |
| } |
| |
| public static NodeSet intersection(NodeIterator ni1, NodeIterator ni2) |
| throws javax.xml.transform.TransformerException |
| { |
| return Extensions.intersection(ni1, ni2); |
| } |
| |
| public static NodeSet difference(NodeIterator ni1, NodeIterator ni2) |
| throws javax.xml.transform.TransformerException |
| { |
| return Extensions.difference(ni1, ni2); |
| } |
| |
| public static NodeSet distinct(ExpressionContext myContext, NodeIterator ni) |
| throws javax.xml.transform.TransformerException |
| { |
| return Extensions.distinct(myContext, ni); |
| } |
| |
| public static boolean hasSameNodes(NodeIterator ni1, NodeIterator ni2) |
| { |
| return Extensions.hasSameNodes(ni1, ni2); |
| } |
| |
| } |