1 /*
2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
3 * @LastModified: Oct 2017
4 */
5 /*
6 * Licensed to the Apache Software Foundation (ASF) under one or more
7 * contributor license agreements. See the NOTICE file distributed with
8 * this work for additional information regarding copyright ownership.
9 * The ASF licenses this file to You under the Apache License, Version 2.0
10 * (the "License"); you may not use this file except in compliance with
11 * the License. You may obtain a copy of the License at
12 *
13 * http://www.apache.org/licenses/LICENSE-2.0
14 *
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
20 */
21
22 package com.sun.org.apache.xpath.internal.objects;
23
24 import com.sun.org.apache.xalan.internal.res.XSLMessages;
25 import com.sun.org.apache.xml.internal.dtm.DTMIterator;
26 import com.sun.org.apache.xml.internal.utils.QName;
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 import java.util.List;
32
33 /**
34 * This class makes an select statement act like an result tree fragment.
35 */
36 public class XRTreeFragSelectWrapper extends XRTreeFrag implements Cloneable
37 {
38 static final long serialVersionUID = -6526177905590461251L;
39 public XRTreeFragSelectWrapper(Expression expr)
40 {
41 super(expr);
42 }
43
44 /**
45 * This function is used to fixup variables from QNames to stack frame
46 * indexes at stylesheet build time.
47 * @param vars List of QNames that correspond to variables. This list
48 * should be searched backwards for the first qualified name that
49 * corresponds to the variable reference qname. The position of the
50 * QName in the vector from the start of the vector will be its position
51 * in the stack frame (but variables above the globalsTop value will need
52 * to be offset to the current stack frame).
53 */
54 public void fixupVariables(List<QName> vars, int globalsSize)
55 {
56 ((Expression)m_obj).fixupVariables(vars, globalsSize);
57 }
58
59 /**
60 * For support of literal objects in xpaths.
61 *
62 * @param xctxt The XPath execution context.
63 *
64 * @return the result of executing the select expression
65 *
66 * @throws javax.xml.transform.TransformerException
67 */
68 public XObject execute(XPathContext xctxt)
69 throws javax.xml.transform.TransformerException
70 {
71 XObject m_selected;
72 m_selected = ((Expression)m_obj).execute(xctxt);
73 m_selected.allowDetachToRelease(m_allowRelease);
74 if (m_selected.getType() == CLASS_STRING)
75 return m_selected;
76 else
77 return new XString(m_selected.str());
78 }
79
80 /**
81 * Detaches the <code>DTMIterator</code> from the set which it iterated
82 * over, releasing any computational resources and placing the iterator
83 * in the INVALID state. After <code>detach</code> has been invoked,
84 * calls to <code>nextNode</code> or <code>previousNode</code> will
85 * raise a runtime exception.
86 *
87 * In general, detach should only be called once on the object.
88 */
89 public void detach()
90 {
91 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_DETACH_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"detach() not supported by XRTreeFragSelectWrapper!");
92 }
93
94 /**
95 * Cast result object to a number.
96 *
97 * @return The result tree fragment as a number or NaN
98 */
99 public double num()
100 throws javax.xml.transform.TransformerException
101 {
102
103 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_NUM_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"num() not supported by XRTreeFragSelectWrapper!");
104 }
105
106
107 /**
108 * Cast result object to an XMLString.
109 *
110 * @return The document fragment node data or the empty string.
111 */
112 public XMLString xstr()
113 {
114 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_XSTR_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"xstr() not supported by XRTreeFragSelectWrapper!");
115 }
116
117 /**
118 * Cast result object to a string.
119 *
120 * @return The document fragment node data or the empty string.
121 */
122 public String str()
123 {
124 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_STR_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"str() not supported by XRTreeFragSelectWrapper!");
125 }
126
127 /**
128 * Tell what kind of class this is.
129 *
130 * @return the string type
131 */
132 public int getType()
133 {
134 return CLASS_STRING;
135 }
136
137 /**
138 * Cast result object to a result tree fragment.
139 *
140 * @return The document fragment this wraps
141 */
142 public int rtf()
143 {
144 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_RTF_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"rtf() not supported by XRTreeFragSelectWrapper!");
145 }
146
147 /**
148 * Cast result object to a DTMIterator.
149 *
150 * @return The document fragment as a DTMIterator
151 */
152 public DTMIterator asNodeIterator()
153 {
154 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_RTF_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"asNodeIterator() not supported by XRTreeFragSelectWrapper!");
155 }
156
157 }