1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
/*
* Copyright 2001-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* $Id: CallTemplate.java,v 1.2.4.1 2005/09/12 10:02:41 pvedula Exp $
*/
package com.sun.org.apache.xalan.internal.xsltc.compiler;
import com.sun.org.apache.bcel.internal.generic.ALOAD;
import com.sun.org.apache.bcel.internal.generic.ASTORE;
import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
import com.sun.org.apache.bcel.internal.generic.InstructionList;
import com.sun.org.apache.bcel.internal.generic.LocalVariableGen;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
import com.sun.org.apache.xml.internal.utils.XML11Char;
import java.util.Vector;
/**
* @author Jacek Ambroziak
* @author Santiago Pericas-Geertsen
* @author Erwin Bolwidt <ejb@klomp.org>
*/
final class CallTemplate extends Instruction {
/**
* Name of template to call.
*/
private QName _name;
/**
* The array of effective parameters in this CallTemplate. An object in
* this array can be either a WithParam or a Param if no WithParam
* exists for a particular parameter.
*/
private Object[] _parameters = null;
/**
* The corresponding template which this CallTemplate calls.
*/
private Template _calleeTemplate = null;
public void display(int indent) {
indent(indent);
System.out.print("CallTemplate");
Util.println(" name " + _name);
displayContents(indent + IndentIncrement);
}
public boolean hasWithParams() {
return elementCount() > 0;
}
public void parseContents(Parser parser) {
final String name = getAttribute("name");
if (name.length() > 0) {
if (!XML11Char.isXML11ValidQName(name)) {
ErrorMsg err = new ErrorMsg(ErrorMsg.INVALID_QNAME_ERR, name, this);
parser.reportError(Constants.ERROR, err);
}
_name = parser.getQNameIgnoreDefaultNs(name);
}
else {
reportError(this, parser, ErrorMsg.REQUIRED_ATTR_ERR, "name");
}
parseChildren(parser);
}
/**
* Verify that a template with this name exists.
*/
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
final Template template = stable.lookupTemplate(_name);
if (template != null) {
typeCheckContents(stable);
}
else {
ErrorMsg err = new ErrorMsg(ErrorMsg.TEMPLATE_UNDEF_ERR,_name,this);
throw new TypeCheckError(err);
}
return Type.Void;
}
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
final Stylesheet stylesheet = classGen.getStylesheet();
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
// If there are Params in the stylesheet or WithParams in this call?
if (stylesheet.hasLocalParams() || hasContents()) {
_calleeTemplate = getCalleeTemplate();
// Build the parameter list if the called template is simple named
if (_calleeTemplate != null) {
buildParameterList();
}
// This is only needed when the called template is not
// a simple named template.
else {
// Push parameter frame
final int push = cpg.addMethodref(TRANSLET_CLASS,
PUSH_PARAM_FRAME,
PUSH_PARAM_FRAME_SIG);
il.append(classGen.loadTranslet());
il.append(new INVOKEVIRTUAL(push));
translateContents(classGen, methodGen);
}
}
// Generate a valid Java method name
final String className = stylesheet.getClassName();
String methodName = Util.escape(_name.toString());
// Load standard arguments
il.append(classGen.loadTranslet());
il.append(methodGen.loadDOM());
il.append(methodGen.loadIterator());
il.append(methodGen.loadHandler());
il.append(methodGen.loadCurrentNode());
// Initialize prefix of method signature
StringBuffer methodSig = new StringBuffer("(" + DOM_INTF_SIG
+ NODE_ITERATOR_SIG + TRANSLET_OUTPUT_SIG + NODE_SIG);
// If calling a simply named template, push actual arguments
if (_calleeTemplate != null) {
Vector calleeParams = _calleeTemplate.getParameters();
int numParams = _parameters.length;
for (int i = 0; i < numParams; i++) {
SyntaxTreeNode node = (SyntaxTreeNode)_parameters[i];
methodSig.append(OBJECT_SIG); // append Object to signature
// Push 'null' if Param to indicate no actual parameter specified
if (node instanceof Param) {
il.append(ACONST_NULL);
}
else { // translate WithParam
node.translate(classGen, methodGen);
}
}
}
// Complete signature and generate invokevirtual call
methodSig.append(")V");
il.append(new INVOKEVIRTUAL(cpg.addMethodref(className,
methodName,
methodSig.toString())));
// Do not need to call Translet.popParamFrame() if we are
// calling a simple named template.
if (_calleeTemplate == null && (stylesheet.hasLocalParams() || hasContents())) {
// Pop parameter frame
final int pop = cpg.addMethodref(TRANSLET_CLASS,
POP_PARAM_FRAME,
POP_PARAM_FRAME_SIG);
il.append(classGen.loadTranslet());
il.append(new INVOKEVIRTUAL(pop));
}
}
/**
* Return the simple named template which this CallTemplate calls.
* Return false if there is no matched template or the matched
* template is not a simple named template.
*/
public Template getCalleeTemplate() {
Template foundTemplate
= getXSLTC().getParser().getSymbolTable().lookupTemplate(_name);
return foundTemplate.isSimpleNamedTemplate() ? foundTemplate : null;
}
/**
* Build the list of effective parameters in this CallTemplate.
* The parameters of the called template are put into the array first.
* Then we visit the WithParam children of this CallTemplate and replace
* the Param with a corresponding WithParam having the same name.
*/
private void buildParameterList() {
// Put the parameters from the called template into the array first.
// This is to ensure the order of the parameters.
Vector defaultParams = _calleeTemplate.getParameters();
int numParams = defaultParams.size();
_parameters = new Object[numParams];
for (int i = 0; i < numParams; i++) {
_parameters[i] = defaultParams.elementAt(i);
}
// Replace a Param with a WithParam if they have the same name.
int count = elementCount();
for (int i = 0; i < count; i++) {
Object node = elementAt(i);
// Ignore if not WithParam
if (node instanceof WithParam) {
WithParam withParam = (WithParam)node;
QName name = withParam.getName();
// Search for a Param with the same name
for (int k = 0; k < numParams; k++) {
Object object = _parameters[k];
if (object instanceof Param
&& ((Param)object).getName().equals(name)) {
withParam.setDoParameterOptimization(true);
_parameters[k] = withParam;
break;
}
else if (object instanceof WithParam
&& ((WithParam)object).getName().equals(name)) {
withParam.setDoParameterOptimization(true);
_parameters[k] = withParam;
break;
}
}
}
}
}
}
|
