author | erikj |
Tue, 12 Sep 2017 19:03:39 +0200 | |
changeset 47216 | 71c04702a3d5 |
parent 44797 | jaxp/src/java.xml/share/classes/com/sun/org/apache/xpath/internal/functions/FuncPosition.java@8b3b3b911b8a |
child 47359 | e1a6c0168741 |
permissions | -rw-r--r-- |
6 | 1 |
/* |
2 |
* reserved comment block |
|
3 |
* DO NOT REMOVE OR ALTER! |
|
4 |
*/ |
|
5 |
/* |
|
44797
8b3b3b911b8a
8162572: Update License Header for all JAXP sources
joehw
parents:
25868
diff
changeset
|
6 |
* Licensed to the Apache Software Foundation (ASF) under one or more |
8b3b3b911b8a
8162572: Update License Header for all JAXP sources
joehw
parents:
25868
diff
changeset
|
7 |
* contributor license agreements. See the NOTICE file distributed with |
8b3b3b911b8a
8162572: Update License Header for all JAXP sources
joehw
parents:
25868
diff
changeset
|
8 |
* this work for additional information regarding copyright ownership. |
8b3b3b911b8a
8162572: Update License Header for all JAXP sources
joehw
parents:
25868
diff
changeset
|
9 |
* The ASF licenses this file to You under the Apache License, Version 2.0 |
8b3b3b911b8a
8162572: Update License Header for all JAXP sources
joehw
parents:
25868
diff
changeset
|
10 |
* (the "License"); you may not use this file except in compliance with |
8b3b3b911b8a
8162572: Update License Header for all JAXP sources
joehw
parents:
25868
diff
changeset
|
11 |
* the License. You may obtain a copy of the License at |
6 | 12 |
* |
44797
8b3b3b911b8a
8162572: Update License Header for all JAXP sources
joehw
parents:
25868
diff
changeset
|
13 |
* http://www.apache.org/licenses/LICENSE-2.0 |
6 | 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 |
*/ |
|
44797
8b3b3b911b8a
8162572: Update License Header for all JAXP sources
joehw
parents:
25868
diff
changeset
|
21 |
|
6 | 22 |
package com.sun.org.apache.xpath.internal.functions; |
23 |
||
24 |
import com.sun.org.apache.xml.internal.dtm.DTM; |
|
25 |
import com.sun.org.apache.xml.internal.dtm.DTMIterator; |
|
26 |
import com.sun.org.apache.xpath.internal.XPathContext; |
|
27 |
import com.sun.org.apache.xpath.internal.axes.SubContextList; |
|
28 |
import com.sun.org.apache.xpath.internal.compiler.Compiler; |
|
29 |
import com.sun.org.apache.xpath.internal.objects.XNumber; |
|
30 |
import com.sun.org.apache.xpath.internal.objects.XObject; |
|
31 |
||
32 |
/** |
|
33 |
* Execute the Position() function. |
|
34 |
* @xsl.usage advanced |
|
35 |
*/ |
|
36 |
public class FuncPosition extends Function |
|
37 |
{ |
|
38 |
static final long serialVersionUID = -9092846348197271582L; |
|
39 |
private boolean m_isTopLevel; |
|
40 |
||
41 |
/** |
|
42 |
* Figure out if we're executing a toplevel expression. |
|
43 |
* If so, we can't be inside of a predicate. |
|
44 |
*/ |
|
45 |
public void postCompileStep(Compiler compiler) |
|
46 |
{ |
|
47 |
m_isTopLevel = compiler.getLocationPathDepth() == -1; |
|
48 |
} |
|
49 |
||
50 |
/** |
|
51 |
* Get the position in the current context node list. |
|
52 |
* |
|
53 |
* @param xctxt Runtime XPath context. |
|
54 |
* |
|
55 |
* @return The current position of the itteration in the context node list, |
|
56 |
* or -1 if there is no active context node list. |
|
57 |
*/ |
|
58 |
public int getPositionInContextNodeList(XPathContext xctxt) |
|
59 |
{ |
|
60 |
||
61 |
// System.out.println("FuncPosition- entry"); |
|
62 |
// If we're in a predicate, then this will return non-null. |
|
63 |
SubContextList iter = m_isTopLevel ? null : xctxt.getSubContextList(); |
|
64 |
||
65 |
if (null != iter) |
|
66 |
{ |
|
67 |
int prox = iter.getProximityPosition(xctxt); |
|
68 |
||
69 |
// System.out.println("FuncPosition- prox: "+prox); |
|
70 |
return prox; |
|
71 |
} |
|
72 |
||
73 |
DTMIterator cnl = xctxt.getContextNodeList(); |
|
74 |
||
75 |
if (null != cnl) |
|
76 |
{ |
|
77 |
int n = cnl.getCurrentNode(); |
|
78 |
if(n == DTM.NULL) |
|
79 |
{ |
|
80 |
if(cnl.getCurrentPos() == 0) |
|
81 |
return 0; |
|
82 |
||
83 |
// Then I think we're in a sort. See sort21.xsl. So the iterator has |
|
84 |
// already been spent, and is not on the node we're processing. |
|
85 |
// It's highly possible that this is an issue for other context-list |
|
86 |
// functions. Shouldn't be a problem for last(), and it shouldn't be |
|
87 |
// a problem for current(). |
|
88 |
try |
|
89 |
{ |
|
90 |
cnl = cnl.cloneWithReset(); |
|
91 |
} |
|
92 |
catch(CloneNotSupportedException cnse) |
|
93 |
{ |
|
94 |
throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(cnse); |
|
95 |
} |
|
96 |
int currentNode = xctxt.getContextNode(); |
|
97 |
// System.out.println("currentNode: "+currentNode); |
|
98 |
while(DTM.NULL != (n = cnl.nextNode())) |
|
99 |
{ |
|
100 |
if(n == currentNode) |
|
101 |
break; |
|
102 |
} |
|
103 |
} |
|
104 |
// System.out.println("n: "+n); |
|
105 |
// System.out.println("FuncPosition- cnl.getCurrentPos(): "+cnl.getCurrentPos()); |
|
106 |
return cnl.getCurrentPos(); |
|
107 |
} |
|
108 |
||
109 |
// System.out.println("FuncPosition - out of guesses: -1"); |
|
110 |
return -1; |
|
111 |
} |
|
112 |
||
113 |
/** |
|
114 |
* Execute the function. The function must return |
|
115 |
* a valid object. |
|
116 |
* @param xctxt The current execution context. |
|
117 |
* @return A valid XObject. |
|
118 |
* |
|
119 |
* @throws javax.xml.transform.TransformerException |
|
120 |
*/ |
|
121 |
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException |
|
122 |
{ |
|
123 |
double pos = (double) getPositionInContextNodeList(xctxt); |
|
124 |
||
125 |
return new XNumber(pos); |
|
126 |
} |
|
127 |
||
128 |
/** |
|
129 |
* No arguments to process, so this does nothing. |
|
130 |
*/ |
|
131 |
public void fixupVariables(java.util.Vector vars, int globalsSize) |
|
132 |
{ |
|
133 |
// no-op |
|
134 |
} |
|
135 |
} |