Parse.java revision 8845:4be14673b9bf 
1/*
2 * Copyright (c) 1998, 2004, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package build.tools.jdwpgen;
27
28import java.util.*;
29import java.io.*;
30
31class Parse {
32
33    final StreamTokenizer izer;
34    final Map<String, Node> kindMap = new HashMap<String, Node>();
35
36    Parse(Reader reader) {
37        izer = new StreamTokenizer(new BufferedReader(reader));
38        izer.resetSyntax();
39        izer.slashStarComments(true);
40        izer.slashSlashComments(true);
41        izer.wordChars((int)'a', (int)'z');
42        izer.wordChars((int)'A', (int)'Z');
43        izer.wordChars((int)'0', (int)'9');
44        izer.wordChars((int)'_', (int)'_');
45        izer.wordChars((int)'-', (int)'-');
46        izer.wordChars((int)'.', (int)'.');
47        izer.whitespaceChars(0, 32);
48        izer.quoteChar('"');
49        izer.quoteChar('\'');
50
51        kindMap.put("CommandSet", new CommandSetNode());
52        kindMap.put("Command", new CommandNode());
53        kindMap.put("Out", new OutNode());
54        kindMap.put("Reply", new ReplyNode());
55        kindMap.put("ErrorSet", new ErrorSetNode());
56        kindMap.put("Error", new ErrorNode());
57        kindMap.put("Event", new EventNode());
58        kindMap.put("Repeat", new RepeatNode());
59        kindMap.put("Group", new GroupNode());
60        kindMap.put("Select", new SelectNode());
61        kindMap.put("Alt", new AltNode());
62        kindMap.put("ConstantSet", new ConstantSetNode());
63        kindMap.put("Constant", new ConstantNode());
64        kindMap.put("int", new IntTypeNode());
65        kindMap.put("long", new LongTypeNode());
66        kindMap.put("boolean", new BooleanTypeNode());
67        kindMap.put("object", new ObjectTypeNode());
68        kindMap.put("threadObject", new ThreadObjectTypeNode());
69        kindMap.put("threadGroupObject", new ThreadGroupObjectTypeNode());
70        kindMap.put("arrayObject", new ArrayObjectTypeNode());
71        kindMap.put("stringObject", new StringObjectTypeNode());
72        kindMap.put("classLoaderObject", new ClassLoaderObjectTypeNode());
73        kindMap.put("classObject", new ClassObjectTypeNode());
74        kindMap.put("referenceType", new ReferenceTypeNode());
75        kindMap.put("referenceTypeID", new ReferenceIDTypeNode());
76        kindMap.put("classType", new ClassTypeNode());
77        kindMap.put("interfaceType", new InterfaceTypeNode());
78        kindMap.put("arrayType", new ArrayTypeNode());
79        kindMap.put("method", new MethodTypeNode());
80        kindMap.put("field", new FieldTypeNode());
81        kindMap.put("frame", new FrameTypeNode());
82        kindMap.put("string", new StringTypeNode());
83        kindMap.put("value", new ValueTypeNode());
84        kindMap.put("byte", new ByteTypeNode());
85        kindMap.put("location", new LocationTypeNode());
86        kindMap.put("tagged-object", new TaggedObjectTypeNode());
87        kindMap.put("referenceTypeID", new ReferenceIDTypeNode());
88        kindMap.put("typed-sequence", new ArrayRegionTypeNode());
89        kindMap.put("untagged-value", new UntaggedValueTypeNode());
90    }
91
92    RootNode items() throws IOException {
93        List<Node> list = new ArrayList<Node>();
94
95        while (izer.nextToken() != StreamTokenizer.TT_EOF) {
96            izer.pushBack();
97            list.add(item());
98        }
99        RootNode node =  new RootNode();
100        node.set("Root", list, 1);
101        return node;
102    }
103
104    Node item() throws IOException {
105        switch (izer.nextToken()) {
106            case StreamTokenizer.TT_EOF:
107                error("Unexpect end-of-file");
108                return null;
109
110            case StreamTokenizer.TT_WORD: {
111                String name = izer.sval;
112                if (izer.nextToken() == '=') {
113                    int ntok = izer.nextToken();
114                    if (ntok == StreamTokenizer.TT_WORD) {
115                        return new NameValueNode(name, izer.sval);
116                    } else if (ntok == '\'') {
117                        return new NameValueNode(name, izer.sval.charAt(0));
118                    } else {
119                        error("Expected value after: " + name + " =");
120                        return null;
121                    }
122                } else {
123                    izer.pushBack();
124                    return new NameNode(name);
125                }
126            }
127
128            case '"':
129                return new CommentNode(izer.sval);
130
131            case '(': {
132                if (izer.nextToken() == StreamTokenizer.TT_WORD) {
133                    String kind = izer.sval;
134                    List<Node> list = new ArrayList<Node>();
135
136                    while (izer.nextToken() != ')') {
137                        izer.pushBack();
138                        list.add(item());
139                    }
140                    Node proto = kindMap.get(kind);
141                    if (proto == null) {
142                        error("Invalid kind: " + kind);
143                        return null;
144                    } else {
145                        try {
146                            Node node = (Node)proto.getClass().newInstance();
147                            node.set(kind, list, izer.lineno());
148                            return node;
149                        } catch (InstantiationException exc) {
150                            error(exc.toString());
151                            return null;
152                        } catch (IllegalAccessException exc) {
153                            error(exc.toString());
154                            return null;
155                        }
156                    }
157                } else {
158                    error("Expected kind identifier, got " + izer.ttype +
159                          " : " + izer.sval);
160                    return null;
161                }
162            }
163
164            default:
165                error("Unexpected character: '" + (char)izer.ttype + "'");
166                return null;
167        }
168    }
169
170    void error(String errmsg) {
171        System.err.println(Main.specSource + ":" + izer.lineno() +
172                           ": " + errmsg);
173        throw new RuntimeException("Error: " + errmsg);
174    }
175}
176