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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: TopLevelElement.java,v 1.5 2005/09/28 13:48:17 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.InstructionList;
29  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
30  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
31  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
32  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
33  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
34  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
35  
36  class TopLevelElement extends SyntaxTreeNode {
37  
38      /*
39       * List of dependencies with other variables, parameters or
40       * keys defined at the top level.
41       */
42      protected Vector _dependencies = null;
43  
44      /**
45       * Type check all the children of this node.
46       */
47      public Type typeCheck(SymbolTable stable) throws TypeCheckError {
48          return typeCheckContents(stable);
49      }
50  
51      /**
52       * Translate this node into JVM bytecodes.
53       */
54      public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
55          ErrorMsg msg = new ErrorMsg(ErrorMsg.NOT_IMPLEMENTED_ERR,
56                                      getClass(), this);
57          getParser().reportError(FATAL, msg);
58      }
59  
60      /**
61       * Translate this node into a fresh instruction list.
62       * The original instruction list is saved and restored.
63       */
64      public InstructionList compile(ClassGenerator classGen,
65                                     MethodGenerator methodGen) {
66          final InstructionList result, save = methodGen.getInstructionList();
67          methodGen.setInstructionList(result = new InstructionList());
68          translate(classGen, methodGen);
69          methodGen.setInstructionList(save);
70          return result;
71      }
72  
73      public void display(int indent) {
74          indent(indent);
75          Util.println("TopLevelElement");
76          displayContents(indent + IndentIncrement);
77      }
78  
79      /**
80       * Add a dependency with other top-level elements like
81       * variables, parameters or keys.
82       */
83      public void addDependency(TopLevelElement other) {
84          if (_dependencies == null) {
85              _dependencies = new Vector();
86          }
87          if (!_dependencies.contains(other)) {
88              _dependencies.addElement(other);
89          }
90      }
91  
92      /**
93       * Get the list of dependencies with other top-level elements
94       * like variables, parameteres or keys.
95       */
96      public Vector getDependencies() {
97          return _dependencies;
98      }
99  
100 }