Thu, 24 Feb 2011 08:40:49 -0800
7018753: tools/javac/varargs/warning/Warn5.java times out on slow machines
Summary: Use a single file manager for all JavacTasks
Reviewed-by: jjg, mcimadamore
1 /*
2 * Copyright (c) 2010, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
24 import com.sun.tools.javac.code.BoundKind;
25 import com.sun.tools.javac.code.Flags;
26 import com.sun.tools.javac.util.Context;
27 import com.sun.tools.javac.code.Types;
28 import com.sun.tools.javac.code.Symtab;
29 import com.sun.tools.javac.code.Type;
30 import com.sun.tools.javac.code.Type.*;
31 import com.sun.tools.javac.code.Symbol.*;
32 import com.sun.tools.javac.comp.Check;
33 import com.sun.tools.javac.util.List;
34 import com.sun.tools.javac.util.ListBuffer;
35 import com.sun.tools.javac.util.Name;
36 import com.sun.tools.javac.util.Names;
37 import com.sun.tools.javac.file.JavacFileManager;
39 /**
40 * Test harness whose goal is to simplify the task of writing type-system
41 * regression test. It provides functionalities to build custom types as well
42 * as to access the underlying javac's symbol table in order to retrieve
43 * predefined types. Among the features supported by the harness are: type
44 * substitution, type containment, subtyping, cast-conversion, assigment
45 * conversion.
46 *
47 * This class is meant to be a common super class for all concrete type test
48 * classes. A subclass can access the type-factory and the test methods so as
49 * to write compact tests. An example is reported below:
50 *
51 * <pre>
52 * Type X = fac.TypeVariable();
53 * Type Y = fac.TypeVariable();
54 * Type A_X_Y = fac.Class(0, X, Y);
55 * Type A_Obj_Obj = fac.Class(0,
56 * predef.objectType,
57 * predef.objectType);
58 * checkSameType(A_Obj_Obj, subst(A_X_Y,
59 * Mapping(X, predef.objectType),
60 * Mapping(Y, predef.objectType)));
61 * </pre>
62 *
63 * The above code is used to create two class types, namely {@code A<X,Y>} and
64 * {@code A<Object,Object>} where both {@code X} and {@code Y} are type-variables.
65 * The code then verifies that {@code [X:=Object,Y:=Object]A<X,Y> == A<Object,Object>}.
66 *
67 * @author mcimadamore
68 */
69 public class TypeHarness {
71 protected Types types;
72 protected Check chk;
73 protected Symtab predef;
74 protected Names names;
75 protected Factory fac;
77 protected TypeHarness() {
78 Context ctx = new Context();
79 JavacFileManager.preRegister(ctx);
80 types = Types.instance(ctx);
81 chk = Check.instance(ctx);
82 predef = Symtab.instance(ctx);
83 names = Names.instance(ctx);
84 fac = new Factory();
85 }
87 // <editor-fold defaultstate="collapsed" desc="type assertions">
89 /** assert that 's' is a subtype of 't' */
90 public void assertSubtype(Type s, Type t) {
91 assertSubtype(s, t, true);
92 }
94 /** assert that 's' is/is not a subtype of 't' */
95 public void assertSubtype(Type s, Type t, boolean expected) {
96 if (types.isSubtype(s, t) != expected) {
97 String msg = expected ?
98 " is not a subtype of " :
99 " is a subtype of ";
100 error(s + msg + t);
101 }
102 }
104 /** assert that 's' is the same type as 't' */
105 public void assertSameType(Type s, Type t) {
106 assertSameType(s, t, true);
107 }
109 /** assert that 's' is/is not the same type as 't' */
110 public void assertSameType(Type s, Type t, boolean expected) {
111 if (types.isSameType(s, t) != expected) {
112 String msg = expected ?
113 " is not the same type as " :
114 " is the same type as ";
115 error(s + msg + t);
116 }
117 }
119 /** assert that 's' is castable to 't' */
120 public void assertCastable(Type s, Type t) {
121 assertCastable(s, t, true);
122 }
124 /** assert that 's' is/is not castable to 't' */
125 public void assertCastable(Type s, Type t, boolean expected) {
126 if (types.isCastable(s, t) != expected) {
127 String msg = expected ?
128 " is not castable to " :
129 " is castable to ";
130 error(s + msg + t);
131 }
132 }
134 /** assert that 's' is convertible (method invocation conversion) to 't' */
135 public void assertConvertible(Type s, Type t) {
136 assertCastable(s, t, true);
137 }
139 /** assert that 's' is/is not convertible (method invocation conversion) to 't' */
140 public void assertConvertible(Type s, Type t, boolean expected) {
141 if (types.isConvertible(s, t) != expected) {
142 String msg = expected ?
143 " is not convertible to " :
144 " is convertible to ";
145 error(s + msg + t);
146 }
147 }
149 /** assert that 's' is assignable to 't' */
150 public void assertAssignable(Type s, Type t) {
151 assertCastable(s, t, true);
152 }
154 /** assert that 's' is/is not assignable to 't' */
155 public void assertAssignable(Type s, Type t, boolean expected) {
156 if (types.isAssignable(s, t) != expected) {
157 String msg = expected ?
158 " is not assignable to " :
159 " is assignable to ";
160 error(s + msg + t);
161 }
162 }
164 /** assert that generic type 't' is well-formed */
165 public void assertValidGenericType(Type t) {
166 assertValidGenericType(t, true);
167 }
169 /** assert that 's' is/is not assignable to 't' */
170 public void assertValidGenericType(Type t, boolean expected) {
171 if (chk.checkValidGenericType(t) != expected) {
172 String msg = expected ?
173 " is not a valid generic type" :
174 " is a valid generic type";
175 error(t + msg + " " + t.tsym.type);
176 }
177 }
178 // </editor-fold>
180 private void error(String msg) {
181 throw new AssertionError("Unexpected result: " + msg);
182 }
184 // <editor-fold defaultstate="collapsed" desc="type functions">
186 /** compute the erasure of a type 't' */
187 public Type erasure(Type t) {
188 return types.erasure(t);
189 }
191 /** compute the capture of a type 't' */
192 public Type capture(Type t) {
193 return types.capture(t);
194 }
196 /** compute the boxed type associated with 't' */
197 public Type box(Type t) {
198 if (!t.isPrimitive()) {
199 throw new AssertionError("Cannot box non-primitive type: " + t);
200 }
201 return types.boxedClass(t).type;
202 }
204 /** compute the unboxed type associated with 't' */
205 public Type unbox(Type t) {
206 Type u = types.unboxedType(t);
207 if (t == null) {
208 throw new AssertionError("Cannot unbox reference type: " + t);
209 } else {
210 return u;
211 }
212 }
214 /** compute a type substitution on 't' given a list of type mappings */
215 public Type subst(Type t, Mapping... maps) {
216 ListBuffer<Type> from = ListBuffer.lb();
217 ListBuffer<Type> to = ListBuffer.lb();
218 for (Mapping tm : maps) {
219 from.append(tm.from);
220 to.append(tm.to);
221 }
222 return types.subst(t, from.toList(), to.toList());
223 }
225 /** create a fresh type mapping from a type to another */
226 public Mapping Mapping(Type from, Type to) {
227 return new Mapping(from, to);
228 }
230 public static class Mapping {
231 Type from;
232 Type to;
233 private Mapping(Type from, Type to) {
234 this.from = from;
235 this.to = to;
236 }
237 }
238 // </editor-fold>
240 // <editor-fold defaultstate="collapsed" desc="type factory">
242 /**
243 * This class is used to create Java types in a simple way. All main
244 * kinds of type are supported: primitive, reference, non-denotable. The
245 * factory also supports creation of constant types (used by the compiler
246 * to represent the type of a literal).
247 */
248 public class Factory {
250 private int synthNameCount = 0;
252 private Name syntheticName() {
253 return names.fromString("A$" + synthNameCount++);
254 }
256 public ClassType Class(long flags, Type... typeArgs) {
257 ClassSymbol csym = new ClassSymbol(flags, syntheticName(), predef.noSymbol);
258 csym.type = new ClassType(Type.noType, List.from(typeArgs), csym);
259 ((ClassType)csym.type).supertype_field = predef.objectType;
260 return (ClassType)csym.type;
261 }
263 public ClassType Class(Type... typeArgs) {
264 return Class(0, typeArgs);
265 }
267 public ClassType Interface(Type... typeArgs) {
268 return Class(Flags.INTERFACE, typeArgs);
269 }
271 public ClassType Interface(long flags, Type... typeArgs) {
272 return Class(Flags.INTERFACE | flags, typeArgs);
273 }
275 public Type Constant(byte b) {
276 return predef.byteType.constType(b);
277 }
279 public Type Constant(short s) {
280 return predef.shortType.constType(s);
281 }
283 public Type Constant(int i) {
284 return predef.intType.constType(i);
285 }
287 public Type Constant(long l) {
288 return predef.longType.constType(l);
289 }
291 public Type Constant(float f) {
292 return predef.floatType.constType(f);
293 }
295 public Type Constant(double d) {
296 return predef.doubleType.constType(d);
297 }
299 public Type Constant(char c) {
300 return predef.charType.constType(c + 0);
301 }
303 public ArrayType Array(Type elemType) {
304 return new ArrayType(elemType, predef.arrayClass);
305 }
307 public TypeVar TypeVariable() {
308 return TypeVariable(predef.objectType);
309 }
311 public TypeVar TypeVariable(Type bound) {
312 TypeSymbol tvsym = new TypeSymbol(0, syntheticName(), null, predef.noSymbol);
313 tvsym.type = new TypeVar(tvsym, bound, null);
314 return (TypeVar)tvsym.type;
315 }
317 public WildcardType Wildcard(BoundKind bk, Type bound) {
318 return new WildcardType(bound, bk, predef.boundClass);
319 }
321 public CapturedType CapturedVariable(Type upper, Type lower) {
322 return new CapturedType(syntheticName(), predef.noSymbol, upper, lower, null);
323 }
325 public ClassType Intersection(Type classBound, Type... intfBounds) {
326 ClassType ct = Class(Flags.COMPOUND);
327 ct.supertype_field = classBound;
328 ct.interfaces_field = List.from(intfBounds);
329 return ct;
330 }
331 }
332 // </editor-fold>
333 }