Tue, 26 Oct 2010 14:29:48 -0700
6949587: rename "DisjointType" to "DisjunctType"
Reviewed-by: mcimadamore
1 /*
2 * Copyright (c) 2003, 2008, 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.comp;
28 import com.sun.tools.javac.util.*;
29 import com.sun.tools.javac.code.*;
30 import com.sun.tools.javac.code.Symbol.*;
31 import com.sun.tools.javac.tree.*;
32 import com.sun.tools.javac.tree.JCTree.*;
34 /** Enter annotations on symbols. Annotations accumulate in a queue,
35 * which is processed at the top level of any set of recursive calls
36 * requesting it be processed.
37 *
38 * <p><b>This is NOT part of any supported API.
39 * If you write code that depends on this, you do so at your own risk.
40 * This code and its internal interfaces are subject to change or
41 * deletion without notice.</b>
42 */
43 public class Annotate {
44 protected static final Context.Key<Annotate> annotateKey =
45 new Context.Key<Annotate>();
47 public static Annotate instance(Context context) {
48 Annotate instance = context.get(annotateKey);
49 if (instance == null)
50 instance = new Annotate(context);
51 return instance;
52 }
54 final Attr attr;
55 final TreeMaker make;
56 final Log log;
57 final Symtab syms;
58 final Names names;
59 final Resolve rs;
60 final Types types;
61 final ConstFold cfolder;
62 final Check chk;
64 protected Annotate(Context context) {
65 context.put(annotateKey, this);
66 attr = Attr.instance(context);
67 make = TreeMaker.instance(context);
68 log = Log.instance(context);
69 syms = Symtab.instance(context);
70 names = Names.instance(context);
71 rs = Resolve.instance(context);
72 types = Types.instance(context);
73 cfolder = ConstFold.instance(context);
74 chk = Check.instance(context);
75 }
77 /* ********************************************************************
78 * Queue maintenance
79 *********************************************************************/
81 private int enterCount = 0;
83 ListBuffer<Annotator> q = new ListBuffer<Annotator>();
85 public void later(Annotator a) {
86 q.append(a);
87 }
89 public void earlier(Annotator a) {
90 q.prepend(a);
91 }
93 /** Called when the Enter phase starts. */
94 public void enterStart() {
95 enterCount++;
96 }
98 /** Called after the Enter phase completes. */
99 public void enterDone() {
100 enterCount--;
101 flush();
102 }
104 public void flush() {
105 if (enterCount != 0) return;
106 enterCount++;
107 try {
108 while (q.nonEmpty())
109 q.next().enterAnnotation();
110 } finally {
111 enterCount--;
112 }
113 }
115 /** A client that has annotations to add registers an annotator,
116 * the method it will use to add the annotation. There are no
117 * parameters; any needed data should be captured by the
118 * Annotator.
119 */
120 public interface Annotator {
121 void enterAnnotation();
122 String toString();
123 }
126 /* ********************************************************************
127 * Compute an attribute from its annotation.
128 *********************************************************************/
130 /** Process a single compound annotation, returning its
131 * Attribute. Used from MemberEnter for attaching the attributes
132 * to the annotated symbol.
133 */
134 Attribute.Compound enterAnnotation(JCAnnotation a,
135 Type expected,
136 Env<AttrContext> env) {
137 // The annotation might have had its type attributed (but not checked)
138 // by attr.attribAnnotationTypes during MemberEnter, in which case we do not
139 // need to do it again.
140 Type at = (a.annotationType.type != null ? a.annotationType.type
141 : attr.attribType(a.annotationType, env));
142 a.type = chk.checkType(a.annotationType.pos(), at, expected);
143 if (a.type.isErroneous())
144 return new Attribute.Compound(a.type, List.<Pair<MethodSymbol,Attribute>>nil());
145 if ((a.type.tsym.flags() & Flags.ANNOTATION) == 0) {
146 log.error(a.annotationType.pos(),
147 "not.annotation.type", a.type.toString());
148 return new Attribute.Compound(a.type, List.<Pair<MethodSymbol,Attribute>>nil());
149 }
150 List<JCExpression> args = a.args;
151 if (args.length() == 1 && args.head.getTag() != JCTree.ASSIGN) {
152 // special case: elided "value=" assumed
153 args.head = make.at(args.head.pos).
154 Assign(make.Ident(names.value), args.head);
155 }
156 ListBuffer<Pair<MethodSymbol,Attribute>> buf =
157 new ListBuffer<Pair<MethodSymbol,Attribute>>();
158 for (List<JCExpression> tl = args; tl.nonEmpty(); tl = tl.tail) {
159 JCExpression t = tl.head;
160 if (t.getTag() != JCTree.ASSIGN) {
161 log.error(t.pos(), "annotation.value.must.be.name.value");
162 continue;
163 }
164 JCAssign assign = (JCAssign)t;
165 if (assign.lhs.getTag() != JCTree.IDENT) {
166 log.error(t.pos(), "annotation.value.must.be.name.value");
167 continue;
168 }
169 JCIdent left = (JCIdent)assign.lhs;
170 Symbol method = rs.resolveQualifiedMethod(left.pos(),
171 env,
172 a.type,
173 left.name,
174 List.<Type>nil(),
175 null);
176 left.sym = method;
177 left.type = method.type;
178 if (method.owner != a.type.tsym)
179 log.error(left.pos(), "no.annotation.member", left.name, a.type);
180 Type result = method.type.getReturnType();
181 Attribute value = enterAttributeValue(result, assign.rhs, env);
182 if (!method.type.isErroneous())
183 buf.append(new Pair<MethodSymbol,Attribute>
184 ((MethodSymbol)method, value));
185 t.type = result;
186 }
187 return new Attribute.Compound(a.type, buf.toList());
188 }
190 Attribute enterAttributeValue(Type expected,
191 JCExpression tree,
192 Env<AttrContext> env) {
193 if (expected.isPrimitive() || types.isSameType(expected, syms.stringType)) {
194 Type result = attr.attribExpr(tree, env, expected);
195 if (result.isErroneous())
196 return new Attribute.Error(expected);
197 if (result.constValue() == null) {
198 log.error(tree.pos(), "attribute.value.must.be.constant");
199 return new Attribute.Error(expected);
200 }
201 result = cfolder.coerce(result, expected);
202 return new Attribute.Constant(expected, result.constValue());
203 }
204 if (expected.tsym == syms.classType.tsym) {
205 Type result = attr.attribExpr(tree, env, expected);
206 if (result.isErroneous())
207 return new Attribute.Error(expected);
208 if (TreeInfo.name(tree) != names._class) {
209 log.error(tree.pos(), "annotation.value.must.be.class.literal");
210 return new Attribute.Error(expected);
211 }
212 return new Attribute.Class(types,
213 (((JCFieldAccess) tree).selected).type);
214 }
215 if ((expected.tsym.flags() & Flags.ANNOTATION) != 0) {
216 if (tree.getTag() != JCTree.ANNOTATION) {
217 log.error(tree.pos(), "annotation.value.must.be.annotation");
218 expected = syms.errorType;
219 }
220 return enterAnnotation((JCAnnotation)tree, expected, env);
221 }
222 if (expected.tag == TypeTags.ARRAY) { // should really be isArray()
223 if (tree.getTag() != JCTree.NEWARRAY) {
224 tree = make.at(tree.pos).
225 NewArray(null, List.<JCExpression>nil(), List.of(tree));
226 }
227 JCNewArray na = (JCNewArray)tree;
228 if (na.elemtype != null) {
229 log.error(na.elemtype.pos(), "new.not.allowed.in.annotation");
230 return new Attribute.Error(expected);
231 }
232 ListBuffer<Attribute> buf = new ListBuffer<Attribute>();
233 for (List<JCExpression> l = na.elems; l.nonEmpty(); l=l.tail) {
234 buf.append(enterAttributeValue(types.elemtype(expected),
235 l.head,
236 env));
237 }
238 na.type = expected;
239 return new Attribute.
240 Array(expected, buf.toArray(new Attribute[buf.length()]));
241 }
242 if (expected.tag == TypeTags.CLASS &&
243 (expected.tsym.flags() & Flags.ENUM) != 0) {
244 attr.attribExpr(tree, env, expected);
245 Symbol sym = TreeInfo.symbol(tree);
246 if (sym == null ||
247 TreeInfo.nonstaticSelect(tree) ||
248 sym.kind != Kinds.VAR ||
249 (sym.flags() & Flags.ENUM) == 0) {
250 log.error(tree.pos(), "enum.annotation.must.be.enum.constant");
251 return new Attribute.Error(expected);
252 }
253 VarSymbol enumerator = (VarSymbol) sym;
254 return new Attribute.Enum(expected, enumerator);
255 }
256 if (!expected.isErroneous())
257 log.error(tree.pos(), "annotation.value.not.allowable.type");
258 return new Attribute.Error(attr.attribExpr(tree, env, expected));
259 }
260 }