1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  * @LastModified: Oct 2017
   4  */
   5 /*
   6  * Licensed to the Apache Software Foundation (ASF) under one or more
   7  * contributor license agreements.  See the NOTICE file distributed with
   8  * this work for additional information regarding copyright ownership.
   9  * The ASF licenses this file to You under the Apache License, Version 2.0
  10  * (the "License"); you may not use this file except in compliance with
  11  * the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21 
  22 package com.sun.org.apache.xalan.internal.xsltc.compiler;
  23 
  24 import com.sun.org.apache.bcel.internal.generic.InstructionList;
  25 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
  26 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
  27 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
  28 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
  29 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
  30 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
  31 import java.util.ArrayList;
  32 import java.util.List;
  33 
  34 class TopLevelElement extends SyntaxTreeNode {
  35 
  36     /*
  37      * List of dependencies with other variables, parameters or
  38      * keys defined at the top level.
  39      */
  40     protected List<SyntaxTreeNode> _dependencies = null;
  41 
  42     /**
  43      * Type check all the children of this node.
  44      */
  45     public Type typeCheck(SymbolTable stable) throws TypeCheckError {
  46         return typeCheckContents(stable);
  47     }
  48 
  49     /**
  50      * Translate this node into JVM bytecodes.
  51      */
  52     public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
  53         ErrorMsg msg = new ErrorMsg(ErrorMsg.NOT_IMPLEMENTED_ERR,
  54                                     getClass(), this);
  55         getParser().reportError(FATAL, msg);
  56     }
  57 
  58     /**
  59      * Translate this node into a fresh instruction list.
  60      * The original instruction list is saved and restored.
  61      */
  62     public InstructionList compile(ClassGenerator classGen,
  63                                    MethodGenerator methodGen) {
  64         final InstructionList result, save = methodGen.getInstructionList();
  65         methodGen.setInstructionList(result = new InstructionList());
  66         translate(classGen, methodGen);
  67         methodGen.setInstructionList(save);
  68         return result;
  69     }
  70 
  71     public void display(int indent) {
  72         indent(indent);
  73         Util.println("TopLevelElement");
  74         displayContents(indent + IndentIncrement);
  75     }
  76 
  77     /**
  78      * Add a dependency with other top-level elements like
  79      * variables, parameters or keys.
  80      */
  81     public void addDependency(TopLevelElement other) {
  82         if (_dependencies == null) {
  83             _dependencies = new ArrayList<>();
  84         }
  85         if (!_dependencies.contains(other)) {
  86             _dependencies.add(other);
  87         }
  88     }
  89 
  90     /**
  91      * Get the list of dependencies with other top-level elements
  92      * like variables, parameteres or keys.
  93      */
  94     public List<SyntaxTreeNode> getDependencies() {
  95         return _dependencies;
  96     }
  97 
  98 }