Thu, 20 Dec 2012 16:24:18 -0800
8004982: JDK8 source with GPL header errors
Reviewed-by: ohair
1 /*
2 * Copyright (c) 2012, 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 */
26 package org.openjdk.tests.shapegen;
28 import java.util.ArrayList;
29 import java.util.HashMap;
30 import java.util.List;
31 import java.util.Map;
32 import java.io.IOException;
33 import java.io.StringReader;
35 import static java.lang.Character.isLetter;
36 import static java.lang.Character.isUpperCase;
37 import static java.lang.Character.isWhitespace;
39 /**
40 * Parse a type template definition string
41 *
42 * input :: classDef
43 * classDef :: letter [ ( classDef* ) ]
44 *
45 * @author Robert Field
46 */
47 public class TTParser extends StringReader {
49 private Map<Character, TTNode> letterMap = new HashMap<>();
50 private char ch;
52 private final String def;
54 public TTParser(String s) {
55 super(s);
56 this.def = s;
57 }
59 private void advance() throws IOException {
60 do {
61 ch = (char)read();
62 } while (isWhitespace(ch));
63 }
65 public TTNode parse() {
66 try {
67 advance();
68 return classDef();
69 } catch (IOException t) {
70 throw new RuntimeException(t);
71 }
72 }
74 private TTNode classDef() throws IOException {
75 if (!isLetter(ch)) {
76 if (ch == (char)-1) {
77 throw new IOException("Unexpected end of type template in " + def);
78 } else {
79 throw new IOException("Unexpected character in type template: " + (Character)ch + " in " + def);
80 }
81 }
82 char nodeCh = ch;
83 TTNode node = letterMap.get(nodeCh);
84 boolean canBeClass = isUpperCase(nodeCh);
85 advance();
86 if (node == null) {
87 List<TTNode> subtypes = new ArrayList<>();
88 if (ch == '(') {
89 advance();
90 while (ch != ')') {
91 subtypes.add(classDef());
92 }
93 advance();
94 }
95 node = new TTNode(subtypes, canBeClass);
96 letterMap.put(nodeCh, node);
97 }
98 return node;
99 }
100 }