| /* |
| * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| package com.sun.tools.javac.api; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import javax.annotation.processing.ProcessingEnvironment; |
| import javax.lang.model.element.AnnotationMirror; |
| import javax.lang.model.element.AnnotationValue; |
| import javax.lang.model.element.Element; |
| import javax.lang.model.element.ExecutableElement; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.type.DeclaredType; |
| import javax.lang.model.type.TypeMirror; |
| import javax.tools.JavaCompiler; |
| import javax.tools.JavaFileObject; |
| |
| import com.sun.source.tree.CompilationUnitTree; |
| import com.sun.source.tree.Scope; |
| import com.sun.source.tree.Tree; |
| import com.sun.source.util.SourcePositions; |
| import com.sun.source.util.TreePath; |
| import com.sun.source.util.Trees; |
| import com.sun.tools.javac.code.Symbol.ClassSymbol; |
| import com.sun.tools.javac.code.Symbol.TypeSymbol; |
| import com.sun.tools.javac.code.Symbol; |
| import com.sun.tools.javac.comp.Attr; |
| import com.sun.tools.javac.comp.AttrContext; |
| import com.sun.tools.javac.comp.Enter; |
| import com.sun.tools.javac.comp.Env; |
| import com.sun.tools.javac.comp.MemberEnter; |
| import com.sun.tools.javac.comp.Resolve; |
| import com.sun.tools.javac.model.JavacElements; |
| import com.sun.tools.javac.processing.JavacProcessingEnvironment; |
| import com.sun.tools.javac.tree.JCTree.*; |
| import com.sun.tools.javac.tree.JCTree; |
| import com.sun.tools.javac.tree.TreeCopier; |
| import com.sun.tools.javac.tree.TreeInfo; |
| import com.sun.tools.javac.tree.TreeMaker; |
| import com.sun.tools.javac.util.Context; |
| import com.sun.tools.javac.util.List; |
| import com.sun.tools.javac.util.Log; |
| import com.sun.tools.javac.util.Pair; |
| |
| /** |
| * Provides an implementation of Trees. |
| * |
| * <p><b>This is NOT part of any API supported by Sun Microsystems. |
| * If you write code that depends on this, you do so at your own |
| * risk. This code and its internal interfaces are subject to change |
| * or deletion without notice.</b></p> |
| * |
| * @author Peter von der Ahé |
| */ |
| public class JavacTrees extends Trees { |
| |
| private final Resolve resolve; |
| private final Enter enter; |
| private final Log log; |
| private final MemberEnter memberEnter; |
| private final Attr attr; |
| private final TreeMaker treeMaker; |
| private final JavacElements elements; |
| private final JavacTaskImpl javacTaskImpl; |
| |
| public static JavacTrees instance(JavaCompiler.CompilationTask task) { |
| if (!(task instanceof JavacTaskImpl)) |
| throw new IllegalArgumentException(); |
| return instance(((JavacTaskImpl)task).getContext()); |
| } |
| |
| public static JavacTrees instance(ProcessingEnvironment env) { |
| if (!(env instanceof JavacProcessingEnvironment)) |
| throw new IllegalArgumentException(); |
| return instance(((JavacProcessingEnvironment)env).getContext()); |
| } |
| |
| public static JavacTrees instance(Context context) { |
| JavacTrees instance = context.get(JavacTrees.class); |
| if (instance == null) |
| instance = new JavacTrees(context); |
| return instance; |
| } |
| |
| private JavacTrees(Context context) { |
| context.put(JavacTrees.class, this); |
| attr = Attr.instance(context); |
| enter = Enter.instance(context); |
| elements = JavacElements.instance(context); |
| log = Log.instance(context); |
| resolve = Resolve.instance(context); |
| treeMaker = TreeMaker.instance(context); |
| memberEnter = MemberEnter.instance(context); |
| javacTaskImpl = context.get(JavacTaskImpl.class); |
| } |
| |
| public SourcePositions getSourcePositions() { |
| return new SourcePositions() { |
| public long getStartPosition(CompilationUnitTree file, Tree tree) { |
| return TreeInfo.getStartPos((JCTree) tree); |
| } |
| |
| public long getEndPosition(CompilationUnitTree file, Tree tree) { |
| Map<JCTree,Integer> endPositions = ((JCCompilationUnit) file).endPositions; |
| return TreeInfo.getEndPos((JCTree) tree, endPositions); |
| } |
| }; |
| } |
| |
| public JCClassDecl getTree(TypeElement element) { |
| return (JCClassDecl) getTree((Element) element); |
| } |
| |
| public JCMethodDecl getTree(ExecutableElement method) { |
| return (JCMethodDecl) getTree((Element) method); |
| } |
| |
| public JCTree getTree(Element element) { |
| Symbol symbol = (Symbol) element; |
| TypeSymbol enclosing = symbol.enclClass(); |
| Env<AttrContext> env = enter.getEnv(enclosing); |
| if (env == null) |
| return null; |
| JCClassDecl classNode = env.enclClass; |
| if (classNode != null) { |
| if (TreeInfo.symbolFor(classNode) == element) |
| return classNode; |
| for (JCTree node : classNode.getMembers()) |
| if (TreeInfo.symbolFor(node) == element) |
| return node; |
| } |
| return null; |
| } |
| |
| public JCTree getTree(Element e, AnnotationMirror a) { |
| return getTree(e, a, null); |
| } |
| |
| public JCTree getTree(Element e, AnnotationMirror a, AnnotationValue v) { |
| Pair<JCTree, JCCompilationUnit> treeTopLevel = elements.getTreeAndTopLevel(e, a, v); |
| if (treeTopLevel == null) |
| return null; |
| return treeTopLevel.fst; |
| } |
| |
| public TreePath getPath(CompilationUnitTree unit, Tree node) { |
| return TreePath.getPath(unit, node); |
| } |
| |
| public TreePath getPath(Element e) { |
| return getPath(e, null, null); |
| } |
| |
| public TreePath getPath(Element e, AnnotationMirror a) { |
| return getPath(e, a, null); |
| } |
| |
| public TreePath getPath(Element e, AnnotationMirror a, AnnotationValue v) { |
| final Pair<JCTree, JCCompilationUnit> treeTopLevel = elements.getTreeAndTopLevel(e, a, v); |
| if (treeTopLevel == null) |
| return null; |
| return TreePath.getPath(treeTopLevel.snd, treeTopLevel.fst); |
| } |
| |
| public Element getElement(TreePath path) { |
| Tree t = path.getLeaf(); |
| return TreeInfo.symbolFor((JCTree) t); |
| } |
| |
| public TypeMirror getTypeMirror(TreePath path) { |
| Tree t = path.getLeaf(); |
| return ((JCTree)t).type; |
| } |
| |
| public JavacScope getScope(TreePath path) { |
| return new JavacScope(getAttrContext(path)); |
| } |
| |
| public boolean isAccessible(Scope scope, TypeElement type) { |
| if (scope instanceof JavacScope && type instanceof ClassSymbol) { |
| Env<AttrContext> env = ((JavacScope) scope).env; |
| return resolve.isAccessible(env, (ClassSymbol)type); |
| } else |
| return false; |
| } |
| |
| public boolean isAccessible(Scope scope, Element member, DeclaredType type) { |
| if (scope instanceof JavacScope |
| && member instanceof Symbol |
| && type instanceof com.sun.tools.javac.code.Type) { |
| Env<AttrContext> env = ((JavacScope) scope).env; |
| return resolve.isAccessible(env, (com.sun.tools.javac.code.Type)type, (Symbol)member); |
| } else |
| return false; |
| } |
| |
| private Env<AttrContext> getAttrContext(TreePath path) { |
| if (!(path.getLeaf() instanceof JCTree)) // implicit null-check |
| throw new IllegalArgumentException(); |
| |
| // if we're being invoked via from a JSR199 client, we need to make sure |
| // all the classes have been entered; if we're being invoked from JSR269, |
| // then the classes will already have been entered. |
| if (javacTaskImpl != null) { |
| try { |
| javacTaskImpl.enter(null); |
| } catch (IOException e) { |
| throw new Error("unexpected error while entering symbols: " + e); |
| } |
| } |
| |
| |
| JCCompilationUnit unit = (JCCompilationUnit) path.getCompilationUnit(); |
| Copier copier = new Copier(treeMaker.forToplevel(unit)); |
| |
| Env<AttrContext> env = null; |
| JCMethodDecl method = null; |
| JCVariableDecl field = null; |
| |
| List<Tree> l = List.nil(); |
| TreePath p = path; |
| while (p != null) { |
| l = l.prepend(p.getLeaf()); |
| p = p.getParentPath(); |
| } |
| |
| for ( ; l.nonEmpty(); l = l.tail) { |
| Tree tree = l.head; |
| switch (tree.getKind()) { |
| case COMPILATION_UNIT: |
| // System.err.println("COMP: " + ((JCCompilationUnit)tree).sourcefile); |
| env = enter.getTopLevelEnv((JCCompilationUnit)tree); |
| break; |
| case CLASS: |
| // System.err.println("CLASS: " + ((JCClassDecl)tree).sym.getSimpleName()); |
| env = enter.getClassEnv(((JCClassDecl)tree).sym); |
| break; |
| case METHOD: |
| // System.err.println("METHOD: " + ((JCMethodDecl)tree).sym.getSimpleName()); |
| method = (JCMethodDecl)tree; |
| break; |
| case VARIABLE: |
| // System.err.println("FIELD: " + ((JCVariableDecl)tree).sym.getSimpleName()); |
| field = (JCVariableDecl)tree; |
| break; |
| case BLOCK: { |
| // System.err.println("BLOCK: "); |
| if (method != null) |
| env = memberEnter.getMethodEnv(method, env); |
| JCTree body = copier.copy((JCTree)tree, (JCTree) path.getLeaf()); |
| env = attribStatToTree(body, env, copier.leafCopy); |
| return env; |
| } |
| default: |
| // System.err.println("DEFAULT: " + tree.getKind()); |
| if (field != null && field.getInitializer() == tree) { |
| env = memberEnter.getInitEnv(field, env); |
| JCExpression expr = copier.copy((JCExpression)tree, (JCTree) path.getLeaf()); |
| env = attribExprToTree(expr, env, copier.leafCopy); |
| return env; |
| } |
| } |
| } |
| return field != null ? memberEnter.getInitEnv(field, env) : env; |
| } |
| |
| private Env<AttrContext> attribStatToTree(JCTree stat, Env<AttrContext>env, JCTree tree) { |
| JavaFileObject prev = log.useSource(env.toplevel.sourcefile); |
| try { |
| return attr.attribStatToTree(stat, env, tree); |
| } finally { |
| log.useSource(prev); |
| } |
| } |
| |
| private Env<AttrContext> attribExprToTree(JCExpression expr, Env<AttrContext>env, JCTree tree) { |
| JavaFileObject prev = log.useSource(env.toplevel.sourcefile); |
| try { |
| return attr.attribExprToTree(expr, env, tree); |
| } finally { |
| log.useSource(prev); |
| } |
| } |
| |
| /** |
| * Makes a copy of a tree, noting the value resulting from copying a particular leaf. |
| **/ |
| static class Copier extends TreeCopier<JCTree> { |
| JCTree leafCopy = null; |
| |
| Copier(TreeMaker M) { |
| super(M); |
| } |
| |
| public <T extends JCTree> T copy(T t, JCTree leaf) { |
| T t2 = super.copy(t, leaf); |
| if (t == leaf) |
| leafCopy = t2; |
| return t2; |
| } |
| } |
| } |
