| /* |
| * 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.templates; |
| |
| import org.apache.xpath.*; |
| import org.apache.xpath.objects.XObject; |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.compiler.XPathParser; |
| import org.apache.xml.utils.FastStringBuffer; |
| |
| //import org.w3c.dom.*; |
| import org.apache.xml.dtm.DTM; |
| |
| /** |
| * <meta name="usage" content="internal"/> |
| * Simple string part of a complex AVT. |
| */ |
| public class AVTPartXPath extends AVTPart |
| { |
| |
| /** |
| * The XPath object contained in this part. |
| * @serial |
| */ |
| private XPath m_xpath; |
| |
| /** |
| * This function is used to fixup variables from QNames to stack frame |
| * indexes at stylesheet build time. |
| * @param vars List of QNames that correspond to variables. This list |
| * should be searched backwards for the first qualified name that |
| * corresponds to the variable reference qname. The position of the |
| * QName in the vector from the start of the vector will be its position |
| * in the stack frame (but variables above the globalsTop value will need |
| * to be offset to the current stack frame). |
| */ |
| public void fixupVariables(java.util.Vector vars, int globalsSize) |
| { |
| m_xpath.fixupVariables(vars, globalsSize); |
| } |
| |
| /** |
| * Tell if this expression or it's subexpressions can traverse outside |
| * the current subtree. |
| * |
| * @return true if traversal outside the context node's subtree can occur. |
| */ |
| public boolean canTraverseOutsideSubtree() |
| { |
| return m_xpath.getExpression().canTraverseOutsideSubtree(); |
| } |
| |
| /** |
| * Construct a simple AVT part. |
| * |
| * @param xpath Xpath section of AVT |
| */ |
| public AVTPartXPath(XPath xpath) |
| { |
| m_xpath = xpath; |
| } |
| |
| /** |
| * Construct a simple AVT part. |
| * |
| * @param val A pure string section of an AVT. |
| * @param nsNode An object which can be used to determine the |
| * Namespace Name (URI) for any Namespace prefix used in the XPath. |
| * Usually this is based on the context where the XPath was specified, |
| * such as a node within a Stylesheet. |
| * @param xpathProcessor XPath parser |
| * @param factory XPath factory |
| * @param liaison An XPathContext object, providing infomation specific |
| * to this invocation and this thread. Maintains SAX output state, |
| * variables, error handler and so on, so the transformation/XPath |
| * object itself can be simultaneously invoked from multiple threads. |
| * |
| * @throws javax.xml.transform.TransformerException |
| * TODO: Fix or remove this unused c'tor. |
| */ |
| public AVTPartXPath( |
| String val, org.apache.xml.utils.PrefixResolver nsNode, |
| XPathParser xpathProcessor, XPathFactory factory, |
| XPathContext liaison) |
| throws javax.xml.transform.TransformerException |
| { |
| m_xpath = new XPath(val, null, nsNode, XPath.SELECT, liaison.getErrorListener()); |
| } |
| |
| /** |
| * Get the AVT part as the original string. |
| * |
| * @return the AVT part as the original string. |
| */ |
| public String getSimpleString() |
| { |
| return "{" + m_xpath.getPatternString() + "}"; |
| } |
| |
| /** |
| * Write the value into the buffer. |
| * |
| * @param xctxt An XPathContext object, providing infomation specific |
| * to this invocation and this thread. Maintains SAX state, variables, |
| * error handler and so on, so the transformation/XPath object itself |
| * can be simultaneously invoked from multiple threads. |
| * @param buf Buffer to write into. |
| * @param context The current source tree context. |
| * @param nsNode The current namespace context (stylesheet tree context). |
| * @param NodeList The current Context Node List. |
| * |
| * @throws javax.xml.transform.TransformerException |
| */ |
| public void evaluate( |
| XPathContext xctxt, FastStringBuffer buf, int context, org.apache.xml.utils.PrefixResolver nsNode) |
| throws javax.xml.transform.TransformerException |
| { |
| |
| XObject xobj = m_xpath.execute(xctxt, context, nsNode); |
| |
| if (null != xobj) |
| { |
| xobj.appendToFsb(buf); |
| } |
| } |
| } |