1 /*
2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
3 */
4 /*
5 * Licensed to the Apache Software Foundation (ASF) under one or more
6 * contributor license agreements. See the NOTICE file distributed with
7 * this work for additional information regarding copyright ownership.
8 * The ASF licenses this file to You under the Apache License, Version 2.0
9 * (the "License"); you may not use this file except in compliance with
10 * the License. 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 package com.sun.org.apache.xpath.internal.objects;
22
23 import com.sun.org.apache.xalan.internal.res.XSLMessages;
24 import com.sun.org.apache.xml.internal.dtm.DTMIterator;
25 import com.sun.org.apache.xml.internal.utils.QName;
26 import com.sun.org.apache.xml.internal.utils.XMLString;
27 import com.sun.org.apache.xpath.internal.Expression;
28 import com.sun.org.apache.xpath.internal.XPathContext;
29 import com.sun.org.apache.xpath.internal.res.XPATHErrorResources;
30 import java.util.List;
31
32 /**
33 * This class makes an select statement act like an result tree fragment.
34 *
35 * @LastModified: Oct 2017
36 */
37 public class XRTreeFragSelectWrapper extends XRTreeFrag implements Cloneable
38 {
39 static final long serialVersionUID = -6526177905590461251L;
40 public XRTreeFragSelectWrapper(Expression expr)
41 {
42 super(expr);
43 }
44
45 /**
46 * This function is used to fixup variables from QNames to stack frame
47 * indexes at stylesheet build time.
48 * @param vars List of QNames that correspond to variables. This list
49 * should be searched backwards for the first qualified name that
50 * corresponds to the variable reference qname. The position of the
51 * QName in the vector from the start of the vector will be its position
52 * in the stack frame (but variables above the globalsTop value will need
53 * to be offset to the current stack frame).
54 */
55 public void fixupVariables(List<QName> vars, int globalsSize)
56 {
57 ((Expression)m_obj).fixupVariables(vars, globalsSize);
58 }
59
60 /**
61 * For support of literal objects in xpaths.
62 *
63 * @param xctxt The XPath execution context.
64 *
65 * @return the result of executing the select expression
66 *
67 * @throws javax.xml.transform.TransformerException
68 */
69 public XObject execute(XPathContext xctxt)
70 throws javax.xml.transform.TransformerException
71 {
72 XObject m_selected;
73 m_selected = ((Expression)m_obj).execute(xctxt);
74 m_selected.allowDetachToRelease(m_allowRelease);
75 if (m_selected.getType() == CLASS_STRING)
76 return m_selected;
77 else
78 return new XString(m_selected.str());
79 }
80
81 /**
82 * Detaches the <code>DTMIterator</code> from the set which it iterated
83 * over, releasing any computational resources and placing the iterator
84 * in the INVALID state. After <code>detach</code> has been invoked,
85 * calls to <code>nextNode</code> or <code>previousNode</code> will
86 * raise a runtime exception.
87 *
88 * In general, detach should only be called once on the object.
89 */
90 public void detach()
91 {
92 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_DETACH_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"detach() not supported by XRTreeFragSelectWrapper!");
93 }
94
95 /**
96 * Cast result object to a number.
97 *
98 * @return The result tree fragment as a number or NaN
99 */
100 public double num()
101 throws javax.xml.transform.TransformerException
102 {
103
104 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_NUM_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"num() not supported by XRTreeFragSelectWrapper!");
105 }
106
107
108 /**
109 * Cast result object to an XMLString.
110 *
111 * @return The document fragment node data or the empty string.
112 */
113 public XMLString xstr()
114 {
115 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_XSTR_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"xstr() not supported by XRTreeFragSelectWrapper!");
116 }
117
118 /**
119 * Cast result object to a string.
120 *
121 * @return The document fragment node data or the empty string.
122 */
123 public String str()
124 {
125 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_STR_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"str() not supported by XRTreeFragSelectWrapper!");
126 }
127
128 /**
129 * Tell what kind of class this is.
130 *
131 * @return the string type
132 */
133 public int getType()
134 {
135 return CLASS_STRING;
136 }
137
138 /**
139 * Cast result object to a result tree fragment.
140 *
141 * @return The document fragment this wraps
142 */
143 public int rtf()
144 {
145 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_RTF_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"rtf() not supported by XRTreeFragSelectWrapper!");
146 }
147
148 /**
149 * Cast result object to a DTMIterator.
150 *
151 * @return The document fragment as a DTMIterator
152 */
153 public DTMIterator asNodeIterator()
154 {
155 throw new RuntimeException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_RTF_NOT_SUPPORTED_XRTREEFRAGSELECTWRAPPER, null)); //"asNodeIterator() not supported by XRTreeFragSelectWrapper!");
156 }
157
158 }