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1   /*
2    * reserved comment block
3    * DO NOT REMOVE OR ALTER!
4    */
5   /*
6    * Copyright 2001-2004 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: StringLengthCall.java,v 1.2.4.1 2005/09/05 09:08:46 pvedula Exp $
22   */
23  
24  package com.sun.org.apache.xalan.internal.xsltc.compiler;
25  
26  import java.util.Vector;
27  
28  import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
29  import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
30  import com.sun.org.apache.bcel.internal.generic.InstructionList;
31  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
32  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
33  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
34  
35  /**
36   * @author Jacek Ambroziak
37   * @author Santiago Pericas-Geertsen
38   */
39  final class StringLengthCall extends FunctionCall {
40      public StringLengthCall(QName fname, Vector arguments) {
41          super(fname, arguments);
42      }
43  
44      public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
45          final ConstantPoolGen cpg = classGen.getConstantPool();
46          final InstructionList il = methodGen.getInstructionList();
47          if (argumentCount() > 0) {
48              argument().translate(classGen, methodGen);
49          }
50          else {
51              il.append(methodGen.loadContextNode());
52              Type.Node.translateTo(classGen, methodGen, Type.String);
53          }
54          il.append(new INVOKEVIRTUAL(cpg.addMethodref(STRING_CLASS,
55                                                       "length", "()I")));
56      }
57  }