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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: NamespaceUriCall.java,v 1.2.4.1 2005/09/02 10:25:26 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.INVOKEINTERFACE;
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  
34  /**
35   * @author Morten Jorgensen
36   */
37  final class NamespaceUriCall extends NameBase {
38  
39      /**
40       * Handles calls with no parameter (current node is implicit parameter).
41       */
42      public NamespaceUriCall(QName fname) {
43          super(fname);
44      }
45  
46      /**
47       * Handles calls with one parameter (either node or node-set).
48       */
49      public NamespaceUriCall(QName fname, Vector arguments) {
50          super(fname, arguments);
51      }
52  
53      /**
54       * Translate code that leaves a node's namespace URI (as a String)
55       * on the stack
56       */
57      public void translate(ClassGenerator classGen,
58                            MethodGenerator methodGen) {
59          final ConstantPoolGen cpg = classGen.getConstantPool();
60          final InstructionList il = methodGen.getInstructionList();
61  
62          // Returns the string value for a node in the DOM
63          final int getNamespace = cpg.addInterfaceMethodref(DOM_INTF,
64                                                             "getNamespaceName",
65                                                             "(I)"+STRING_SIG);
66          super.translate(classGen, methodGen);
67          il.append(new INVOKEINTERFACE(getNamespace, 2));
68      }
69  }