1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 /* 6 * Copyright 1999-2004 The Apache Software Foundation. 7 * 8 * Licensed under the Apache License, Version 2.0 (the "License"); 9 * you may not use this file except in compliance with the License. 10 * You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 /* 21 * $Id: XRTreeFragSelectWrapper.java,v 1.2.4.1 2005/09/15 02:02:35 jeffsuttor Exp $ 22 */ 23 package com.sun.org.apache.xpath.internal.objects; 24 25 import com.sun.org.apache.xalan.internal.res.XSLMessages; 26 import com.sun.org.apache.xml.internal.dtm.DTMIterator; 27 import com.sun.org.apache.xml.internal.utils.XMLString; 28 import com.sun.org.apache.xpath.internal.Expression; 29 import com.sun.org.apache.xpath.internal.XPathContext; 30 import com.sun.org.apache.xpath.internal.res.XPATHErrorResources; 31 32 /** 33 * This class makes an select statement act like an result tree fragment. 34 */ 35 public class XRTreeFragSelectWrapper extends XRTreeFrag implements Cloneable 36 { 37 static final long serialVersionUID = -6526177905590461251L; XRTreeFragSelectWrapper(Expression expr)38 public XRTreeFragSelectWrapper(Expression expr) 39 { 40 super(expr); 41 } 42 43 /** 44 * This function is used to fixup variables from QNames to stack frame 45 * indexes at stylesheet build time. 46 * @param vars List of QNames that correspond to variables. This list 47 * should be searched backwards for the first qualified name that 48 * corresponds to the variable reference qname. The position of the 49 * QName in the vector from the start of the vector will be its position 50 * in the stack frame (but variables above the globalsTop value will need 51 * to be offset to the current stack frame). 52 */ fixupVariables(java.util.Vector vars, int globalsSize)53 public void fixupVariables(java.util.Vector vars, int globalsSize) 54 { 55 ((Expression)m_obj).fixupVariables(vars, globalsSize); 56 } 57 58 /** 59 * For support of literal objects in xpaths. 60 * 61 * @param xctxt The XPath execution context. 62 * 63 * @return the result of executing the select expression 64 * 65 * @throws javax.xml.transform.TransformerException 66 */ execute(XPathContext xctxt)67 public XObject execute(XPathContext xctxt) 68 throws javax.xml.transform.TransformerException 69 { 70 XObject m_selected; 71 m_selected = ((Expression)m_obj).execute(xctxt); 72 m_selected.allowDetachToRelease(m_allowRelease); 73 if (m_selected.getType() == CLASS_STRING) 74 return m_selected; 75 else 76 return new XString(m_selected.str()); 77 } 78 79 /** 80 * Detaches the <code>DTMIterator</code> from the set which it iterated 81 * over, releasing any computational resources and placing the iterator 82 * in the INVALID state. After <code>detach</code> has been invoked, 83 * calls to <code>nextNode</code> or <code>previousNode</code> will 84 * raise a runtime exception. 85 * 86 * In general, detach should only be called once on the object. 87 */ detach()88 public void detach() 89 { 90 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_DETACH_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"detach() not supported by XRTreeFragSelectWrapper!"); 91 } 92 93 /** 94 * Cast result object to a number. 95 * 96 * @return The result tree fragment as a number or NaN 97 */ num()98 public double num() 99 throws javax.xml.transform.TransformerException 100 { 101 102 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_NUM_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"num() not supported by XRTreeFragSelectWrapper!"); 103 } 104 105 106 /** 107 * Cast result object to an XMLString. 108 * 109 * @return The document fragment node data or the empty string. 110 */ xstr()111 public XMLString xstr() 112 { 113 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_XSTR_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"xstr() not supported by XRTreeFragSelectWrapper!"); 114 } 115 116 /** 117 * Cast result object to a string. 118 * 119 * @return The document fragment node data or the empty string. 120 */ str()121 public String str() 122 { 123 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_STR_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"str() not supported by XRTreeFragSelectWrapper!"); 124 } 125 126 /** 127 * Tell what kind of class this is. 128 * 129 * @return the string type 130 */ getType()131 public int getType() 132 { 133 return CLASS_STRING; 134 } 135 136 /** 137 * Cast result object to a result tree fragment. 138 * 139 * @return The document fragment this wraps 140 */ rtf()141 public int rtf() 142 { 143 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_RTF_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"rtf() not supported by XRTreeFragSelectWrapper!"); 144 } 145 146 /** 147 * Cast result object to a DTMIterator. 148 * 149 * @return The document fragment as a DTMIterator 150 */ asNodeIterator()151 public DTMIterator asNodeIterator() 152 { 153 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_RTF_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"asNodeIterator() not supported by XRTreeFragSelectWrapper!"); 154 } 155 156 } 157