- /*
- * 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.Expression;
- 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.apache.xpath.ExpressionOwner;
-
- //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);
- }
- }
-
- /**
- * @see XSLTVisitable#callVisitors(XSLTVisitor)
- */
- public void callVisitors(XSLTVisitor visitor)
- {
- m_xpath.getExpression().callVisitors(m_xpath, visitor);
- }
- }