| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999-2003 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.xpath.objects; |
| |
| import org.apache.xml.dtm.DTM; |
| import org.apache.xml.dtm.DTMIterator; |
| import org.apache.xml.dtm.DTMFilter; |
| |
| import org.apache.xml.utils.XMLString; |
| |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.Expression; |
| import org.apache.xalan.res.XSLMessages; |
| import org.apache.xpath.res.XPATHErrorResources; |
| |
| /** |
| * This class makes an select statement act like an result tree fragment. |
| */ |
| public class XRTreeFragSelectWrapper extends XRTreeFrag implements Cloneable |
| { |
| XObject m_selected; |
| |
| public XRTreeFragSelectWrapper(Expression expr) |
| { |
| super(expr); |
| } |
| |
| /** |
| * 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) |
| { |
| ((Expression)m_obj).fixupVariables(vars, globalsSize); |
| } |
| |
| /** |
| * For support of literal objects in xpaths. |
| * |
| * @param xctxt The XPath execution context. |
| * |
| * @return the result of executing the select expression |
| * |
| * @throws javax.xml.transform.TransformerException |
| */ |
| public XObject execute(XPathContext xctxt) |
| throws javax.xml.transform.TransformerException |
| { |
| m_selected = ((Expression)m_obj).execute(xctxt); |
| m_selected.allowDetachToRelease(m_allowRelease); |
| if (m_selected.getType() == CLASS_STRING) |
| return m_selected; |
| else |
| return new XString(m_selected.str()); |
| } |
| |
| /** |
| * Detaches the <code>DTMIterator</code> from the set which it iterated |
| * over, releasing any computational resources and placing the iterator |
| * in the INVALID state. After <code>detach</code> has been invoked, |
| * calls to <code>nextNode</code> or <code>previousNode</code> will |
| * raise a runtime exception. |
| * |
| * In general, detach should only be called once on the object. |
| */ |
| public void detach() |
| { |
| if(m_allowRelease) |
| { |
| m_selected.detach(); |
| m_selected = null; |
| } |
| |
| super.detach(); |
| } |
| |
| /** |
| * Cast result object to a number. |
| * |
| * @return The result tree fragment as a number or NaN |
| */ |
| public double num() |
| throws javax.xml.transform.TransformerException |
| { |
| |
| return m_selected.num(); |
| } |
| |
| |
| /** |
| * Cast result object to an XMLString. |
| * |
| * @return The document fragment node data or the empty string. |
| */ |
| public XMLString xstr() |
| { |
| return m_selected.xstr(); |
| } |
| |
| /** |
| * Cast result object to a string. |
| * |
| * @return The document fragment node data or the empty string. |
| */ |
| public String str() |
| { |
| return m_selected.str(); |
| } |
| |
| /** |
| * Tell what kind of class this is. |
| * |
| * @return the string type |
| */ |
| public int getType() |
| { |
| return CLASS_STRING; |
| } |
| |
| /** |
| * Cast result object to a result tree fragment. |
| * |
| * @return The document fragment this wraps |
| */ |
| public int rtf() |
| { |
| throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_RTF_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"rtf() not supported by XRTreeFragSelectWrapper!"); |
| } |
| |
| /** |
| * Cast result object to a DTMIterator. |
| * |
| * @return The document fragment as a DTMIterator |
| */ |
| public DTMIterator asNodeIterator() |
| { |
| throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_RTF_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"asNodeIterator() not supported by XRTreeFragSelectWrapper!"); |
| } |
| |
| } |