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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: Instruction.java,v 1.2.4.1 2005/09/01 15:45:11 pvedula Exp $
22   */
23  
24  package com.sun.org.apache.xalan.internal.xsltc.compiler;
25  
26  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
27  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
28  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
29  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
30  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
31  
32  /**
33   * @author Jacek Ambroziak
34   * @author Santiago Pericas-Geertsen
35   */
36  abstract class Instruction extends SyntaxTreeNode {
37      /**
38       * Type check all the children of this node.
39       */
40      public Type typeCheck(SymbolTable stable) throws TypeCheckError {
41          return typeCheckContents(stable);
42      }
43  
44      /**
45       * Translate this node into JVM bytecodes.
46       */
47      public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
48          ErrorMsg msg = new ErrorMsg(ErrorMsg.NOT_IMPLEMENTED_ERR,
49                                      getClass(), this);
50          getParser().reportError(FATAL, msg);
51      }
52  }