Thu, 30 Jul 2009 10:29:53 +0100
6827648: Extremely slow compilation time for visitor pattern code + generics
Summary: Javac unnecessarily recomputates type-substitutions multiple times
Reviewed-by: jjg
1 /*
2 * Copyright 2004-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 */
25 import com.sun.mirror.apt.*;
26 import com.sun.mirror.declaration.*;
27 import com.sun.mirror.type.*;
28 import com.sun.mirror.util.*;
30 import java.util.Collection;
31 import java.util.Set;
32 import java.util.Arrays;
34 import static java.util.Collections.*;
35 import static com.sun.mirror.util.DeclarationVisitors.*;
37 /*
38 * Indirect test of whether source or class files are used to provide
39 * declaration information.
40 */
41 public class FreshnessApf implements AnnotationProcessorFactory {
42 // Process any set of annotations
43 private static final Collection<String> supportedAnnotations
44 = unmodifiableCollection(Arrays.asList("*"));
46 // No supported options
47 private static final Collection<String> supportedOptions = emptySet();
49 public Collection<String> supportedAnnotationTypes() {
50 return supportedAnnotations;
51 }
53 public Collection<String> supportedOptions() {
54 return supportedOptions;
55 }
57 public AnnotationProcessor getProcessorFor(
58 Set<AnnotationTypeDeclaration> atds,
59 AnnotationProcessorEnvironment env) {
60 return new FreshnessAp(env);
61 }
63 private static class FreshnessAp implements AnnotationProcessor {
64 private final AnnotationProcessorEnvironment env;
65 FreshnessAp(AnnotationProcessorEnvironment env) {
66 this.env = env;
67 }
69 public void process() {
70 System.out.println("Testing for freshness.");
71 boolean empty = true;
72 for (TypeDeclaration typeDecl : env.getSpecifiedTypeDeclarations()) {
73 for (FieldDeclaration fieldDecl: typeDecl.getFields() ) {
74 empty = false;
75 System.out.println(typeDecl.getQualifiedName() +
76 "." + fieldDecl.getSimpleName());
78 // Verify the declaration for the type of the
79 // field is a class with an annotation.
80 System.out.println(((DeclaredType) fieldDecl.getType()).getDeclaration().getAnnotationMirrors());
81 if (((DeclaredType) fieldDecl.getType()).getDeclaration().getAnnotationMirrors().size() == 0)
82 env.getMessager().printError("Expected an annotation.");
83 }
84 }
86 if (empty)
87 env.getMessager().printError("No fields encountered.");
88 }
89 }
90 }