001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018 /*
019 * $Id: TopLevelElement.java 476471 2006-11-18 08:36:27Z minchau $
020 */
021
022 package org.apache.xalan.xsltc.compiler;
023
024 import java.util.Vector;
025
026 import org.apache.bcel.generic.InstructionList;
027 import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
028 import org.apache.xalan.xsltc.compiler.util.ErrorMsg;
029 import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
030 import org.apache.xalan.xsltc.compiler.util.Type;
031 import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
032 import org.apache.xalan.xsltc.compiler.util.Util;
033
034 class TopLevelElement extends SyntaxTreeNode {
035
036 /*
037 * List of dependencies with other variables, parameters or
038 * keys defined at the top level.
039 */
040 protected Vector _dependencies = null;
041
042 /**
043 * Type check all the children of this node.
044 */
045 public Type typeCheck(SymbolTable stable) throws TypeCheckError {
046 return typeCheckContents(stable);
047 }
048
049 /**
050 * Translate this node into JVM bytecodes.
051 */
052 public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
053 ErrorMsg msg = new ErrorMsg(ErrorMsg.NOT_IMPLEMENTED_ERR,
054 getClass(), this);
055 getParser().reportError(FATAL, msg);
056 }
057
058 /**
059 * Translate this node into a fresh instruction list.
060 * The original instruction list is saved and restored.
061 */
062 public InstructionList compile(ClassGenerator classGen,
063 MethodGenerator methodGen) {
064 final InstructionList result, save = methodGen.getInstructionList();
065 methodGen.setInstructionList(result = new InstructionList());
066 translate(classGen, methodGen);
067 methodGen.setInstructionList(save);
068 return result;
069 }
070
071 public void display(int indent) {
072 indent(indent);
073 Util.println("TopLevelElement");
074 displayContents(indent + IndentIncrement);
075 }
076
077 /**
078 * Add a dependency with other top-level elements like
079 * variables, parameters or keys.
080 */
081 public void addDependency(TopLevelElement other) {
082 if (_dependencies == null) {
083 _dependencies = new Vector();
084 }
085 if (!_dependencies.contains(other)) {
086 _dependencies.addElement(other);
087 }
088 }
089
090 /**
091 * Get the list of dependencies with other top-level elements
092 * like variables, parameteres or keys.
093 */
094 public Vector getDependencies() {
095 return _dependencies;
096 }
097
098 }