|
1
19
20 package org.netbeans.lib.lexer.test;
21
22 import java.lang.reflect.Method  ;
23 import java.util.ArrayList ;
24 import java.util.List ;
25
26
27
32 public class CharRangesDump {
33
34 public static void main(String ... args) {
35 String methodName = (args[0] != null) ? args[0] : "isWhitespace";
36 new CharRangesDump(new CharacterMethodAcceptor(methodName)).dump();
37 }
38
39 private UnicodeCharAcceptor acceptor;
40
41 private List <Integer > charRanges = new ArrayList <Integer >();
42
43 public CharRangesDump(UnicodeCharAcceptor acceptor) {
44 if (acceptor == null) {
45 throw new IllegalArgumentException ("acceptor must be non-null");
46 }
47 this.acceptor = acceptor;
48 initRanges();
49 }
50
51 private void initRanges() {
52 int seqStart = -1;
53 for (int i = 0; i <= Character.MAX_CODE_POINT + 1; i++) {
54 if ((i <= Character.MAX_CODE_POINT) && acceptor.isAccepted(i)) {
55 if (seqStart == -1) {
56 seqStart = i;
57 } } else { if (seqStart != -1) { charRanges.add(seqStart);
61 charRanges.add(i - 1);
62 seqStart = -1;
63 }
64 }
65 }
66 }
67
68 public List <Integer > charRanges() {
69 return charRanges;
70 }
71
72 public void dump() {
73 StringBuilder sb = new StringBuilder (acceptor.toString());
74 sb.append('\n');
75 for (int i = 0; i < charRanges.size(); i++) {
76 Integer start = charRanges.get(i++);
77 Integer end = charRanges.get(i);
78 if (!start.equals(end)) { sb.append("Sequence: " + charToString(start) + " - "
80 + charToString(end));
81 int seqLen = end - start;
82 if (seqLen >= 2 && seqLen <= 9) {
83 sb.append(" incl. ");
84 for (int c = start + 1; c < end; c++) {
85 if (c != start + 1) {
86 sb.append(", ");
87 }
88 sb.append('\'');
89 sb.append(LexerTestUtilities.debugText(String.valueOf((char)c)));
90 sb.append('\'');
91 }
92 }
93 sb.append('\n');
94 } else { sb.append("Char: " + charToString(start) + '\n');
96 }
97 }
98
99 System.err.println(sb.toString());
100 }
101
102 public void dumpAsserts() {
103 StringBuilder sb = new StringBuilder ();
104 for (int i = 0; i < charRanges.size(); i++) {
105 Integer start = charRanges.get(i++);
106 Integer end = charRanges.get(i);
107 if (start > 0x7F) { break;
109 }
110 appendAssert(sb, i - 1, start);
111 appendAssert(sb, i, end);
112 }
113 System.err.println(sb.toString());
114 }
115
116 private static void appendAssert(StringBuilder sb, int index, Integer value) {
117 sb.append("TestCase.assertEquals(charRanges.get(" + index + ").intValue(), 0x"
118 + Integer.toString(value.intValue(), 16) + ");\n");
119 }
120
121 private String charToString(int i) {
122 return "'" + LexerTestUtilities.debugText(String.valueOf((char)i))
123 + "', " + i + "(0x" + Integer.toString(i, 16) + ")";
124 }
125
126 public interface UnicodeCharAcceptor {
127
128 boolean isAccepted(int c);
129
130 }
131
132 public static final class CharacterMethodAcceptor implements UnicodeCharAcceptor {
133
134 private final Method characterClassMethod;
135
136 public CharacterMethodAcceptor(String methodName) {
137 try {
138 characterClassMethod = Character .class.getDeclaredMethod(
139 methodName, new Class [] { int.class });
140 } catch (Exception e) {
141 throw new IllegalArgumentException (e);
142 }
143 }
144
145 public boolean isAccepted(int c) {
146 try {
147 Object result = characterClassMethod.invoke(null, new Integer (c));
148 assert (result instanceof Boolean );
149 return (Boolean.TRUE.equals(result));
150 } catch (Exception e) {
151 throw new IllegalStateException (e);
152 }
153 }
154
155 public String toString() {
156 return characterClassMethod.toString();
157 }
158
159 }
160
161 }
162 |
Popular Tags |
Java API By Example, From Geeks To Geeks.