Mercurial > jdk8-mips64-public > langtools / file revision
src/share/classes/com/sun/tools/javac/code/Printer.java@2827076dbf64
src/share/classes/com/sun/tools/javac/code/Printer.java
Mon, 26 Mar 2012 15:28:49 +0100
- author
- mcimadamore
- date
- Mon, 26 Mar 2012 15:28:49 +0100
- changeset 1239
- 2827076dbf64
- parent 1114
- 05814303a056
- child 1347
- 1408af4cd8b0
- permissions
- -rw-r--r--
7133185: Update 292 overload resolution logic to match JLS
Summary: Re-implement special overload resolution support for method handles according to the JLS SE 7 definition
Reviewed-by: jjg, dlsmith, jrose
1 /*
2 * Copyright (c) 2009, 2011, 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 com.sun.tools.javac.code;
28 import java.util.Locale;
30 import com.sun.tools.javac.api.Messages;
31 import com.sun.tools.javac.code.Type.*;
32 import com.sun.tools.javac.code.Symbol.*;
33 import com.sun.tools.javac.util.List;
34 import com.sun.tools.javac.util.ListBuffer;
36 import static com.sun.tools.javac.code.TypeTags.*;
37 import static com.sun.tools.javac.code.BoundKind.*;
38 import static com.sun.tools.javac.code.Flags.*;
40 /**
41 * A combined type/symbol visitor for generating non-trivial localized string
42 * representation of types and symbols.
43 *
44 * <p><b>This is NOT part of any supported API.
45 * If you write code that depends on this, you do so at your own risk.
46 * This code and its internal interfaces are subject to change or
47 * deletion without notice.</b>
48 */
49 public abstract class Printer implements Type.Visitor<String, Locale>, Symbol.Visitor<String, Locale> {
51 List<Type> seenCaptured = List.nil();
52 static final int PRIME = 997; // largest prime less than 1000
54 /**
55 * This method should be overriden in order to provide proper i18n support.
56 *
57 * @param locale the locale in which the string is to be rendered
58 * @param key the key corresponding to the message to be displayed
59 * @param args a list of optional arguments
60 * @return localized string representation
61 */
62 protected abstract String localize(Locale locale, String key, Object... args);
64 /**
65 * Maps a captured type into an unique identifier.
66 *
67 * @param t the captured type for which an id is to be retrieved
68 * @param locale locale settings
69 * @return unique id representing this captured type
70 */
71 protected abstract String capturedVarId(CapturedType t, Locale locale);
73 /**
74 * Create a printer with default i18n support provided by Messages. By default,
75 * captured types ids are generated using hashcode.
76 *
77 * @param messages Messages class to be used for i18n
78 * @return printer visitor instance
79 */
80 public static Printer createStandardPrinter(final Messages messages) {
81 return new Printer() {
82 @Override
83 protected String localize(Locale locale, String key, Object... args) {
84 return messages.getLocalizedString(locale, key, args);
85 }
87 @Override
88 protected String capturedVarId(CapturedType t, Locale locale) {
89 return (t.hashCode() & 0xFFFFFFFFL) % PRIME + "";
90 }};
91 }
93 /**
94 * Get a localized string representation for all the types in the input list.
95 *
96 * @param ts types to be displayed
97 * @param locale the locale in which the string is to be rendered
98 * @return localized string representation
99 */
100 public String visitTypes(List<Type> ts, Locale locale) {
101 ListBuffer<String> sbuf = ListBuffer.lb();
102 for (Type t : ts) {
103 sbuf.append(visit(t, locale));
104 }
105 return sbuf.toList().toString();
106 }
108 /**
109 * * Get a localized string representation for all the symbols in the input list.
110 *
111 * @param ts symbols to be displayed
112 * @param locale the locale in which the string is to be rendered
113 * @return localized string representation
114 */
115 public String visitSymbols(List<Symbol> ts, Locale locale) {
116 ListBuffer<String> sbuf = ListBuffer.lb();
117 for (Symbol t : ts) {
118 sbuf.append(visit(t, locale));
119 }
120 return sbuf.toList().toString();
121 }
123 /**
124 * Get a localized string represenation for a given type.
125 *
126 * @param ts type to be displayed
127 * @param locale the locale in which the string is to be rendered
128 * @return localized string representation
129 */
130 public String visit(Type t, Locale locale) {
131 return t.accept(this, locale);
132 }
134 /**
135 * Get a localized string represenation for a given symbol.
136 *
137 * @param ts symbol to be displayed
138 * @param locale the locale in which the string is to be rendered
139 * @return localized string representation
140 */
141 public String visit(Symbol s, Locale locale) {
142 return s.accept(this, locale);
143 }
145 @Override
146 public String visitCapturedType(CapturedType t, Locale locale) {
147 if (seenCaptured.contains(t))
148 return localize(locale, "compiler.misc.type.captureof.1",
149 capturedVarId(t, locale));
150 else {
151 try {
152 seenCaptured = seenCaptured.prepend(t);
153 return localize(locale, "compiler.misc.type.captureof",
154 capturedVarId(t, locale),
155 visit(t.wildcard, locale));
156 }
157 finally {
158 seenCaptured = seenCaptured.tail;
159 }
160 }
161 }
163 @Override
164 public String visitForAll(ForAll t, Locale locale) {
165 return "<" + visitTypes(t.tvars, locale) + ">" + visit(t.qtype, locale);
166 }
168 @Override
169 public String visitUndetVar(UndetVar t, Locale locale) {
170 if (t.inst != null) {
171 return visit(t.inst, locale);
172 } else {
173 return visit(t.qtype, locale) + "?";
174 }
175 }
177 @Override
178 public String visitArrayType(ArrayType t, Locale locale) {
179 return visit(t.elemtype, locale) + "[]";
180 }
182 @Override
183 public String visitClassType(ClassType t, Locale locale) {
184 StringBuffer buf = new StringBuffer();
185 if (t.getEnclosingType().tag == CLASS && t.tsym.owner.kind == Kinds.TYP) {
186 buf.append(visit(t.getEnclosingType(), locale));
187 buf.append(".");
188 buf.append(className(t, false, locale));
189 } else {
190 buf.append(className(t, true, locale));
191 }
192 if (t.getTypeArguments().nonEmpty()) {
193 buf.append('<');
194 buf.append(visitTypes(t.getTypeArguments(), locale));
195 buf.append(">");
196 }
197 return buf.toString();
198 }
200 @Override
201 public String visitMethodType(MethodType t, Locale locale) {
202 return "(" + printMethodArgs(t.argtypes, false, locale) + ")" + visit(t.restype, locale);
203 }
205 @Override
206 public String visitPackageType(PackageType t, Locale locale) {
207 return t.tsym.getQualifiedName().toString();
208 }
210 @Override
211 public String visitWildcardType(WildcardType t, Locale locale) {
212 StringBuffer s = new StringBuffer();
213 s.append(t.kind);
214 if (t.kind != UNBOUND) {
215 s.append(visit(t.type, locale));
216 }
217 return s.toString();
218 }
220 @Override
221 public String visitErrorType(ErrorType t, Locale locale) {
222 return visitType(t, locale);
223 }
225 @Override
226 public String visitTypeVar(TypeVar t, Locale locale) {
227 return visitType(t, locale);
228 }
230 public String visitType(Type t, Locale locale) {
231 String s = (t.tsym == null || t.tsym.name == null)
232 ? localize(locale, "compiler.misc.type.none")
233 : t.tsym.name.toString();
234 return s;
235 }
237 /**
238 * Converts a class name into a (possibly localized) string. Anonymous
239 * inner classes gets converted into a localized string.
240 *
241 * @param t the type of the class whose name is to be rendered
242 * @param longform if set, the class' fullname is displayed - if unset the
243 * short name is chosen (w/o package)
244 * @param locale the locale in which the string is to be rendered
245 * @return localized string representation
246 */
247 protected String className(ClassType t, boolean longform, Locale locale) {
248 Symbol sym = t.tsym;
249 if (sym.name.length() == 0 && (sym.flags() & COMPOUND) != 0) {
250 StringBuffer s = new StringBuffer(visit(t.supertype_field, locale));
251 for (List<Type> is = t.interfaces_field; is.nonEmpty(); is = is.tail) {
252 s.append("&");
253 s.append(visit(is.head, locale));
254 }
255 return s.toString();
256 } else if (sym.name.length() == 0) {
257 String s;
258 ClassType norm = (ClassType) t.tsym.type;
259 if (norm == null) {
260 s = localize(locale, "compiler.misc.anonymous.class", (Object) null);
261 } else if (norm.interfaces_field != null && norm.interfaces_field.nonEmpty()) {
262 s = localize(locale, "compiler.misc.anonymous.class",
263 visit(norm.interfaces_field.head, locale));
264 } else {
265 s = localize(locale, "compiler.misc.anonymous.class",
266 visit(norm.supertype_field, locale));
267 }
268 return s;
269 } else if (longform) {
270 return sym.getQualifiedName().toString();
271 } else {
272 return sym.name.toString();
273 }
274 }
276 /**
277 * Converts a set of method argument types into their corresponding
278 * localized string representation.
279 *
280 * @param args arguments to be rendered
281 * @param varArgs if true, the last method argument is regarded as a vararg
282 * @param locale the locale in which the string is to be rendered
283 * @return localized string representation
284 */
285 protected String printMethodArgs(List<Type> args, boolean varArgs, Locale locale) {
286 if (!varArgs) {
287 return visitTypes(args, locale);
288 } else {
289 StringBuffer buf = new StringBuffer();
290 while (args.tail.nonEmpty()) {
291 buf.append(visit(args.head, locale));
292 args = args.tail;
293 buf.append(',');
294 }
295 if (args.head.tag == ARRAY) {
296 buf.append(visit(((ArrayType) args.head).elemtype, locale));
297 buf.append("...");
298 } else {
299 buf.append(visit(args.head, locale));
300 }
301 return buf.toString();
302 }
303 }
305 @Override
306 public String visitClassSymbol(ClassSymbol sym, Locale locale) {
307 return sym.name.isEmpty()
308 ? localize(locale, "compiler.misc.anonymous.class", sym.flatname)
309 : sym.fullname.toString();
310 }
312 @Override
313 public String visitMethodSymbol(MethodSymbol s, Locale locale) {
314 if (s.isStaticOrInstanceInit()) {
315 return s.owner.name.toString();
316 } else {
317 String ms = (s.name == s.name.table.names.init)
318 ? s.owner.name.toString()
319 : s.name.toString();
320 if (s.type != null) {
321 if (s.type.tag == FORALL) {
322 ms = "<" + visitTypes(s.type.getTypeArguments(), locale) + ">" + ms;
323 }
324 ms += "(" + printMethodArgs(
325 s.type.getParameterTypes(),
326 (s.flags() & VARARGS) != 0,
327 locale) + ")";
328 }
329 return ms;
330 }
331 }
333 @Override
334 public String visitOperatorSymbol(OperatorSymbol s, Locale locale) {
335 return visitMethodSymbol(s, locale);
336 }
338 @Override
339 public String visitPackageSymbol(PackageSymbol s, Locale locale) {
340 return s.isUnnamed()
341 ? localize(locale, "compiler.misc.unnamed.package")
342 : s.fullname.toString();
343 }
345 @Override
346 public String visitTypeSymbol(TypeSymbol s, Locale locale) {
347 return visitSymbol(s, locale);
348 }
350 @Override
351 public String visitVarSymbol(VarSymbol s, Locale locale) {
352 return visitSymbol(s, locale);
353 }
355 @Override
356 public String visitSymbol(Symbol s, Locale locale) {
357 return s.name.toString();
358 }
359 }
