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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: UnparsedEntityUriCall.java,v 1.2.4.1 2005/09/05 09:22:36 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  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.StringType;
34  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
35  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
36  
37  /**
38   * @author Jacek Ambroziak
39   * @author Santiago Pericas-Geertsen
40   * @author Morten Jorgensen
41   */
42  final class UnparsedEntityUriCall extends FunctionCall {
43      private Expression _entity;
44  
45      public UnparsedEntityUriCall(QName fname, Vector arguments) {
46          super(fname, arguments);
47          _entity = argument();
48      }
49  
50      public Type typeCheck(SymbolTable stable) throws TypeCheckError {
51          final Type entity = _entity.typeCheck(stable);
52          if (entity instanceof StringType == false) {
53              _entity = new CastExpr(_entity, Type.String);
54          }
55          return _type = Type.String;
56      }
57  
58      public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
59          final ConstantPoolGen cpg = classGen.getConstantPool();
60          final InstructionList il = methodGen.getInstructionList();
61          // Feck the this pointer on the stack...
62          il.append(methodGen.loadDOM());
63          // ...then the entity name...
64          _entity.translate(classGen, methodGen);
65          // ...to get the URI from the DOM object.
66          il.append(new INVOKEINTERFACE(
67                           cpg.addInterfaceMethodref(DOM_INTF,
68                                                     GET_UNPARSED_ENTITY_URI,
69                                                     GET_UNPARSED_ENTITY_URI_SIG),
70                           2));
71      }
72  }