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src/share/classes/com/sun/tools/javac/api/JavacTrees.java@cb119107aeea
src/share/classes/com/sun/tools/javac/api/JavacTrees.java
Mon, 14 Mar 2011 11:48:41 -0700
- author
- jjg
- date
- Mon, 14 Mar 2011 11:48:41 -0700
- changeset 930
- cb119107aeea
- parent 783
- 90914ac50868
- child 988
- 7ae6c0fd479b
- permissions
- -rw-r--r--
7026509: Cannot use JavaCompiler to create multiple CompilationTasks for partial compilations
Reviewed-by: mcimadamore
1 /*
2 * Copyright (c) 2005, 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. 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.api;
28 import java.io.IOException;
29 import java.util.Map;
30 import javax.annotation.processing.ProcessingEnvironment;
31 import javax.lang.model.element.AnnotationMirror;
32 import javax.lang.model.element.AnnotationValue;
33 import javax.lang.model.element.Element;
34 import javax.lang.model.element.ExecutableElement;
35 import javax.lang.model.element.TypeElement;
36 import javax.lang.model.type.DeclaredType;
37 import javax.lang.model.type.TypeMirror;
38 import javax.tools.Diagnostic;
39 import javax.tools.JavaCompiler;
40 import javax.tools.JavaFileObject;
42 import com.sun.source.tree.CompilationUnitTree;
43 import com.sun.source.tree.Scope;
44 import com.sun.source.tree.Tree;
45 import com.sun.source.util.SourcePositions;
46 import com.sun.source.util.TreePath;
47 import com.sun.source.util.Trees;
48 import com.sun.tools.javac.code.Flags;
49 import com.sun.tools.javac.code.Symbol.ClassSymbol;
50 import com.sun.tools.javac.code.Symbol.TypeSymbol;
51 import com.sun.tools.javac.code.Symbol;
52 import com.sun.tools.javac.code.Type;
53 import com.sun.tools.javac.comp.Attr;
54 import com.sun.tools.javac.comp.AttrContext;
55 import com.sun.tools.javac.comp.Enter;
56 import com.sun.tools.javac.comp.Env;
57 import com.sun.tools.javac.comp.MemberEnter;
58 import com.sun.tools.javac.comp.Resolve;
59 import com.sun.tools.javac.model.JavacElements;
60 import com.sun.tools.javac.processing.JavacProcessingEnvironment;
61 import com.sun.tools.javac.tree.JCTree.*;
62 import com.sun.tools.javac.tree.JCTree;
63 import com.sun.tools.javac.tree.TreeCopier;
64 import com.sun.tools.javac.tree.TreeInfo;
65 import com.sun.tools.javac.tree.TreeMaker;
66 import com.sun.tools.javac.util.Context;
67 import com.sun.tools.javac.util.JCDiagnostic;
68 import com.sun.tools.javac.util.List;
69 import com.sun.tools.javac.util.Log;
70 import com.sun.tools.javac.util.Pair;
72 /**
73 * Provides an implementation of Trees.
74 *
75 * <p><b>This is NOT part of any supported API.
76 * If you write code that depends on this, you do so at your own
77 * risk. This code and its internal interfaces are subject to change
78 * or deletion without notice.</b></p>
79 *
80 * @author Peter von der Ahé
81 */
82 public class JavacTrees extends Trees {
84 // in a world of a single context per compilation, these would all be final
85 private Resolve resolve;
86 private Enter enter;
87 private Log log;
88 private MemberEnter memberEnter;
89 private Attr attr;
90 private TreeMaker treeMaker;
91 private JavacElements elements;
92 private JavacTaskImpl javacTaskImpl;
94 public static JavacTrees instance(JavaCompiler.CompilationTask task) {
95 if (!(task instanceof JavacTaskImpl))
96 throw new IllegalArgumentException();
97 return instance(((JavacTaskImpl)task).getContext());
98 }
100 public static JavacTrees instance(ProcessingEnvironment env) {
101 if (!(env instanceof JavacProcessingEnvironment))
102 throw new IllegalArgumentException();
103 return instance(((JavacProcessingEnvironment)env).getContext());
104 }
106 public static JavacTrees instance(Context context) {
107 JavacTrees instance = context.get(JavacTrees.class);
108 if (instance == null)
109 instance = new JavacTrees(context);
110 return instance;
111 }
113 private JavacTrees(Context context) {
114 context.put(JavacTrees.class, this);
115 init(context);
116 }
118 public void updateContext(Context context) {
119 init(context);
120 }
122 private void init(Context context) {
123 attr = Attr.instance(context);
124 enter = Enter.instance(context);
125 elements = JavacElements.instance(context);
126 log = Log.instance(context);
127 resolve = Resolve.instance(context);
128 treeMaker = TreeMaker.instance(context);
129 memberEnter = MemberEnter.instance(context);
130 javacTaskImpl = context.get(JavacTaskImpl.class);
131 }
133 public SourcePositions getSourcePositions() {
134 return new SourcePositions() {
135 public long getStartPosition(CompilationUnitTree file, Tree tree) {
136 return TreeInfo.getStartPos((JCTree) tree);
137 }
139 public long getEndPosition(CompilationUnitTree file, Tree tree) {
140 Map<JCTree,Integer> endPositions = ((JCCompilationUnit) file).endPositions;
141 return TreeInfo.getEndPos((JCTree) tree, endPositions);
142 }
143 };
144 }
146 public JCClassDecl getTree(TypeElement element) {
147 return (JCClassDecl) getTree((Element) element);
148 }
150 public JCMethodDecl getTree(ExecutableElement method) {
151 return (JCMethodDecl) getTree((Element) method);
152 }
154 public JCTree getTree(Element element) {
155 Symbol symbol = (Symbol) element;
156 TypeSymbol enclosing = symbol.enclClass();
157 Env<AttrContext> env = enter.getEnv(enclosing);
158 if (env == null)
159 return null;
160 JCClassDecl classNode = env.enclClass;
161 if (classNode != null) {
162 if (TreeInfo.symbolFor(classNode) == element)
163 return classNode;
164 for (JCTree node : classNode.getMembers())
165 if (TreeInfo.symbolFor(node) == element)
166 return node;
167 }
168 return null;
169 }
171 public JCTree getTree(Element e, AnnotationMirror a) {
172 return getTree(e, a, null);
173 }
175 public JCTree getTree(Element e, AnnotationMirror a, AnnotationValue v) {
176 Pair<JCTree, JCCompilationUnit> treeTopLevel = elements.getTreeAndTopLevel(e, a, v);
177 if (treeTopLevel == null)
178 return null;
179 return treeTopLevel.fst;
180 }
182 public TreePath getPath(CompilationUnitTree unit, Tree node) {
183 return TreePath.getPath(unit, node);
184 }
186 public TreePath getPath(Element e) {
187 return getPath(e, null, null);
188 }
190 public TreePath getPath(Element e, AnnotationMirror a) {
191 return getPath(e, a, null);
192 }
194 public TreePath getPath(Element e, AnnotationMirror a, AnnotationValue v) {
195 final Pair<JCTree, JCCompilationUnit> treeTopLevel = elements.getTreeAndTopLevel(e, a, v);
196 if (treeTopLevel == null)
197 return null;
198 return TreePath.getPath(treeTopLevel.snd, treeTopLevel.fst);
199 }
201 public Element getElement(TreePath path) {
202 JCTree tree = (JCTree) path.getLeaf();
203 Symbol sym = TreeInfo.symbolFor(tree);
204 if (sym == null && TreeInfo.isDeclaration(tree)) {
205 for (TreePath p = path; p != null; p = p.getParentPath()) {
206 JCTree t = (JCTree) p.getLeaf();
207 if (t.getTag() == JCTree.CLASSDEF) {
208 JCClassDecl ct = (JCClassDecl) t;
209 if (ct.sym != null) {
210 if ((ct.sym.flags_field & Flags.UNATTRIBUTED) != 0) {
211 attr.attribClass(ct.pos(), ct.sym);
212 sym = TreeInfo.symbolFor(tree);
213 }
214 break;
215 }
216 }
217 }
218 }
219 return sym;
220 }
222 public TypeMirror getTypeMirror(TreePath path) {
223 Tree t = path.getLeaf();
224 return ((JCTree)t).type;
225 }
227 public JavacScope getScope(TreePath path) {
228 return new JavacScope(getAttrContext(path));
229 }
231 public String getDocComment(TreePath path) {
232 CompilationUnitTree t = path.getCompilationUnit();
233 if (t instanceof JCTree.JCCompilationUnit) {
234 JCCompilationUnit cu = (JCCompilationUnit) t;
235 if (cu.docComments != null) {
236 return cu.docComments.get(path.getLeaf());
237 }
238 }
239 return null;
240 }
242 public boolean isAccessible(Scope scope, TypeElement type) {
243 if (scope instanceof JavacScope && type instanceof ClassSymbol) {
244 Env<AttrContext> env = ((JavacScope) scope).env;
245 return resolve.isAccessible(env, (ClassSymbol)type, true);
246 } else
247 return false;
248 }
250 public boolean isAccessible(Scope scope, Element member, DeclaredType type) {
251 if (scope instanceof JavacScope
252 && member instanceof Symbol
253 && type instanceof com.sun.tools.javac.code.Type) {
254 Env<AttrContext> env = ((JavacScope) scope).env;
255 return resolve.isAccessible(env, (com.sun.tools.javac.code.Type)type, (Symbol)member, true);
256 } else
257 return false;
258 }
260 private Env<AttrContext> getAttrContext(TreePath path) {
261 if (!(path.getLeaf() instanceof JCTree)) // implicit null-check
262 throw new IllegalArgumentException();
264 // if we're being invoked via from a JSR199 client, we need to make sure
265 // all the classes have been entered; if we're being invoked from JSR269,
266 // then the classes will already have been entered.
267 if (javacTaskImpl != null) {
268 try {
269 javacTaskImpl.enter(null);
270 } catch (IOException e) {
271 throw new Error("unexpected error while entering symbols: " + e);
272 }
273 }
276 JCCompilationUnit unit = (JCCompilationUnit) path.getCompilationUnit();
277 Copier copier = new Copier(treeMaker.forToplevel(unit));
279 Env<AttrContext> env = null;
280 JCMethodDecl method = null;
281 JCVariableDecl field = null;
283 List<Tree> l = List.nil();
284 TreePath p = path;
285 while (p != null) {
286 l = l.prepend(p.getLeaf());
287 p = p.getParentPath();
288 }
290 for ( ; l.nonEmpty(); l = l.tail) {
291 Tree tree = l.head;
292 switch (tree.getKind()) {
293 case COMPILATION_UNIT:
294 // System.err.println("COMP: " + ((JCCompilationUnit)tree).sourcefile);
295 env = enter.getTopLevelEnv((JCCompilationUnit)tree);
296 break;
297 case ANNOTATION_TYPE:
298 case CLASS:
299 case ENUM:
300 case INTERFACE:
301 // System.err.println("CLASS: " + ((JCClassDecl)tree).sym.getSimpleName());
302 env = enter.getClassEnv(((JCClassDecl)tree).sym);
303 break;
304 case METHOD:
305 // System.err.println("METHOD: " + ((JCMethodDecl)tree).sym.getSimpleName());
306 method = (JCMethodDecl)tree;
307 break;
308 case VARIABLE:
309 // System.err.println("FIELD: " + ((JCVariableDecl)tree).sym.getSimpleName());
310 field = (JCVariableDecl)tree;
311 break;
312 case BLOCK: {
313 // System.err.println("BLOCK: ");
314 if (method != null)
315 env = memberEnter.getMethodEnv(method, env);
316 JCTree body = copier.copy((JCTree)tree, (JCTree) path.getLeaf());
317 env = attribStatToTree(body, env, copier.leafCopy);
318 return env;
319 }
320 default:
321 // System.err.println("DEFAULT: " + tree.getKind());
322 if (field != null && field.getInitializer() == tree) {
323 env = memberEnter.getInitEnv(field, env);
324 JCExpression expr = copier.copy((JCExpression)tree, (JCTree) path.getLeaf());
325 env = attribExprToTree(expr, env, copier.leafCopy);
326 return env;
327 }
328 }
329 }
330 return field != null ? memberEnter.getInitEnv(field, env) : env;
331 }
333 private Env<AttrContext> attribStatToTree(JCTree stat, Env<AttrContext>env, JCTree tree) {
334 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
335 try {
336 return attr.attribStatToTree(stat, env, tree);
337 } finally {
338 log.useSource(prev);
339 }
340 }
342 private Env<AttrContext> attribExprToTree(JCExpression expr, Env<AttrContext>env, JCTree tree) {
343 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
344 try {
345 return attr.attribExprToTree(expr, env, tree);
346 } finally {
347 log.useSource(prev);
348 }
349 }
351 /**
352 * Makes a copy of a tree, noting the value resulting from copying a particular leaf.
353 **/
354 static class Copier extends TreeCopier<JCTree> {
355 JCTree leafCopy = null;
357 Copier(TreeMaker M) {
358 super(M);
359 }
361 @Override
362 public <T extends JCTree> T copy(T t, JCTree leaf) {
363 T t2 = super.copy(t, leaf);
364 if (t == leaf)
365 leafCopy = t2;
366 return t2;
367 }
368 }
370 /**
371 * Gets the original type from the ErrorType object.
372 * @param errorType The errorType for which we want to get the original type.
373 * @returns TypeMirror corresponding to the original type, replaced by the ErrorType.
374 * noType (type.tag == NONE) is returned if there is no original type.
375 */
376 public TypeMirror getOriginalType(javax.lang.model.type.ErrorType errorType) {
377 if (errorType instanceof com.sun.tools.javac.code.Type.ErrorType) {
378 return ((com.sun.tools.javac.code.Type.ErrorType)errorType).getOriginalType();
379 }
381 return com.sun.tools.javac.code.Type.noType;
382 }
384 /**
385 * Prints a message of the specified kind at the location of the
386 * tree within the provided compilation unit
387 *
388 * @param kind the kind of message
389 * @param msg the message, or an empty string if none
390 * @param t the tree to use as a position hint
391 * @param root the compilation unit that contains tree
392 */
393 public void printMessage(Diagnostic.Kind kind, CharSequence msg,
394 com.sun.source.tree.Tree t,
395 com.sun.source.tree.CompilationUnitTree root) {
396 JavaFileObject oldSource = null;
397 JavaFileObject newSource = null;
398 JCDiagnostic.DiagnosticPosition pos = null;
400 newSource = root.getSourceFile();
401 if (newSource != null) {
402 oldSource = log.useSource(newSource);
403 pos = ((JCTree) t).pos();
404 }
406 try {
407 switch (kind) {
408 case ERROR:
409 boolean prev = log.multipleErrors;
410 try {
411 log.error(pos, "proc.messager", msg.toString());
412 } finally {
413 log.multipleErrors = prev;
414 }
415 break;
417 case WARNING:
418 log.warning(pos, "proc.messager", msg.toString());
419 break;
421 case MANDATORY_WARNING:
422 log.mandatoryWarning(pos, "proc.messager", msg.toString());
423 break;
425 default:
426 log.note(pos, "proc.messager", msg.toString());
427 }
428 } finally {
429 if (oldSource != null)
430 log.useSource(oldSource);
431 }
432 }
433 }
