1 /*
2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
3  */
4 /*
5  * Licensed to the Apache Software Foundation (ASF) under one or more
6  * contributor license agreements.  See the NOTICE file distributed with
7  * this work for additional information regarding copyright ownership.
8  * The ASF licenses this file to You under the Apache License, Version 2.0
9  * (the "License"); you may not use this file except in compliance with
10  * the License.  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 package com.sun.org.apache.xalan.internal.xsltc.compiler;
22 
23 import com.sun.org.apache.bcel.internal.generic.InstructionList;
24 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
25 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
26 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
27 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
28 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
29 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
30 import java.util.ArrayList;
31 import java.util.List;
32 
33 /**
34  * @LastModified: Oct 2017
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 List<SyntaxTreeNode> _dependencies = null;
43 
44     /**
45      * Type check all the children of this node.
46      */
typeCheck(SymbolTable stable)47     public Type typeCheck(SymbolTable stable) throws TypeCheckError {
48         return typeCheckContents(stable);
49     }
50 
51     /**
52      * Translate this node into JVM bytecodes.
53      */
translate(ClassGenerator classGen, MethodGenerator methodGen)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      */
compile(ClassGenerator classGen, MethodGenerator methodGen)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 
display(int indent)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      */
addDependency(TopLevelElement other)83     public void addDependency(TopLevelElement other) {
84         if (_dependencies == null) {
85             _dependencies = new ArrayList<>();
86         }
87         if (!_dependencies.contains(other)) {
88             _dependencies.add(other);
89         }
90     }
91 
92     /**
93      * Get the list of dependencies with other top-level elements
94      * like variables, parameteres or keys.
95      */
getDependencies()96     public List<SyntaxTreeNode> getDependencies() {
97         return _dependencies;
98     }
99 
100 }
101