duke@1: /*
duke@1: * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved.
duke@1: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1: *
duke@1: * This code is free software; you can redistribute it and/or modify it
duke@1: * under the terms of the GNU General Public License version 2 only, as
duke@1: * published by the Free Software Foundation. Sun designates this
duke@1: * particular file as subject to the "Classpath" exception as provided
duke@1: * by Sun in the LICENSE file that accompanied this code.
duke@1: *
duke@1: * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@1: * version 2 for more details (a copy is included in the LICENSE file that
duke@1: * accompanied this code).
duke@1: *
duke@1: * You should have received a copy of the GNU General Public License version
duke@1: * 2 along with this work; if not, write to the Free Software Foundation,
duke@1: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1: *
duke@1: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@1: * CA 95054 USA or visit www.sun.com if you need additional information or
duke@1: * have any questions.
duke@1: */
duke@1:
duke@1: package com.sun.tools.javac.api;
duke@1:
duke@1: import java.io.IOException;
duke@1: import java.util.Map;
duke@1: import javax.annotation.processing.ProcessingEnvironment;
duke@1: import javax.lang.model.element.AnnotationMirror;
duke@1: import javax.lang.model.element.AnnotationValue;
duke@1: import javax.lang.model.element.Element;
duke@1: import javax.lang.model.element.ExecutableElement;
duke@1: import javax.lang.model.element.TypeElement;
duke@1: import javax.lang.model.type.DeclaredType;
duke@1: import javax.lang.model.type.TypeMirror;
duke@1: import javax.tools.JavaCompiler;
duke@1: import javax.tools.JavaFileObject;
duke@1:
duke@1: import com.sun.source.tree.CompilationUnitTree;
duke@1: import com.sun.source.tree.Scope;
duke@1: import com.sun.source.tree.Tree;
duke@1: import com.sun.source.util.SourcePositions;
duke@1: import com.sun.source.util.TreePath;
duke@1: import com.sun.source.util.Trees;
duke@1: import com.sun.tools.javac.code.Symbol.ClassSymbol;
duke@1: import com.sun.tools.javac.code.Symbol.TypeSymbol;
duke@1: import com.sun.tools.javac.code.Symbol;
duke@1: import com.sun.tools.javac.comp.Attr;
duke@1: import com.sun.tools.javac.comp.AttrContext;
duke@1: import com.sun.tools.javac.comp.Enter;
duke@1: import com.sun.tools.javac.comp.Env;
duke@1: import com.sun.tools.javac.comp.MemberEnter;
duke@1: import com.sun.tools.javac.comp.Resolve;
duke@1: import com.sun.tools.javac.model.JavacElements;
duke@1: import com.sun.tools.javac.processing.JavacProcessingEnvironment;
duke@1: import com.sun.tools.javac.tree.JCTree.*;
duke@1: import com.sun.tools.javac.tree.JCTree;
duke@1: import com.sun.tools.javac.tree.TreeCopier;
duke@1: import com.sun.tools.javac.tree.TreeInfo;
duke@1: import com.sun.tools.javac.tree.TreeMaker;
duke@1: import com.sun.tools.javac.util.Context;
duke@1: import com.sun.tools.javac.util.List;
duke@1: import com.sun.tools.javac.util.Log;
duke@1: import com.sun.tools.javac.util.Pair;
duke@1:
duke@1: /**
duke@1: * Provides an implementation of Trees.
duke@1: *
duke@1: *
This is NOT part of any API supported by Sun Microsystems.
duke@1: * If you write code that depends on this, you do so at your own
duke@1: * risk. This code and its internal interfaces are subject to change
duke@1: * or deletion without notice.
duke@1: *
duke@1: * @author Peter von der Ahé
duke@1: */
duke@1: public class JavacTrees extends Trees {
duke@1:
duke@1: private final Resolve resolve;
duke@1: private final Enter enter;
duke@1: private final Log log;
duke@1: private final MemberEnter memberEnter;
duke@1: private final Attr attr;
duke@1: private final TreeMaker treeMaker;
duke@1: private final JavacElements elements;
duke@1: private final JavacTaskImpl javacTaskImpl;
duke@1:
duke@1: public static JavacTrees instance(JavaCompiler.CompilationTask task) {
duke@1: if (!(task instanceof JavacTaskImpl))
duke@1: throw new IllegalArgumentException();
duke@1: return instance(((JavacTaskImpl)task).getContext());
duke@1: }
duke@1:
duke@1: public static JavacTrees instance(ProcessingEnvironment env) {
duke@1: if (!(env instanceof JavacProcessingEnvironment))
duke@1: throw new IllegalArgumentException();
duke@1: return instance(((JavacProcessingEnvironment)env).getContext());
duke@1: }
duke@1:
duke@1: public static JavacTrees instance(Context context) {
duke@1: JavacTrees instance = context.get(JavacTrees.class);
duke@1: if (instance == null)
duke@1: instance = new JavacTrees(context);
duke@1: return instance;
duke@1: }
duke@1:
duke@1: private JavacTrees(Context context) {
duke@1: context.put(JavacTrees.class, this);
duke@1: attr = Attr.instance(context);
duke@1: enter = Enter.instance(context);
duke@1: elements = JavacElements.instance(context);
duke@1: log = Log.instance(context);
duke@1: resolve = Resolve.instance(context);
duke@1: treeMaker = TreeMaker.instance(context);
duke@1: memberEnter = MemberEnter.instance(context);
duke@1: javacTaskImpl = context.get(JavacTaskImpl.class);
duke@1: }
duke@1:
duke@1: public SourcePositions getSourcePositions() {
duke@1: return new SourcePositions() {
duke@1: public long getStartPosition(CompilationUnitTree file, Tree tree) {
duke@1: return TreeInfo.getStartPos((JCTree) tree);
duke@1: }
duke@1:
duke@1: public long getEndPosition(CompilationUnitTree file, Tree tree) {
duke@1: Map endPositions = ((JCCompilationUnit) file).endPositions;
duke@1: return TreeInfo.getEndPos((JCTree) tree, endPositions);
duke@1: }
duke@1: };
duke@1: }
duke@1:
duke@1: public JCClassDecl getTree(TypeElement element) {
duke@1: return (JCClassDecl) getTree((Element) element);
duke@1: }
duke@1:
duke@1: public JCMethodDecl getTree(ExecutableElement method) {
duke@1: return (JCMethodDecl) getTree((Element) method);
duke@1: }
duke@1:
duke@1: public JCTree getTree(Element element) {
duke@1: Symbol symbol = (Symbol) element;
duke@1: TypeSymbol enclosing = symbol.enclClass();
duke@1: Env env = enter.getEnv(enclosing);
duke@1: if (env == null)
duke@1: return null;
duke@1: JCClassDecl classNode = env.enclClass;
duke@1: if (classNode != null) {
duke@1: if (TreeInfo.symbolFor(classNode) == element)
duke@1: return classNode;
duke@1: for (JCTree node : classNode.getMembers())
duke@1: if (TreeInfo.symbolFor(node) == element)
duke@1: return node;
duke@1: }
duke@1: return null;
duke@1: }
duke@1:
duke@1: public JCTree getTree(Element e, AnnotationMirror a) {
duke@1: return getTree(e, a, null);
duke@1: }
duke@1:
duke@1: public JCTree getTree(Element e, AnnotationMirror a, AnnotationValue v) {
duke@1: Pair treeTopLevel = elements.getTreeAndTopLevel(e, a, v);
duke@1: if (treeTopLevel == null)
duke@1: return null;
duke@1: return treeTopLevel.fst;
duke@1: }
duke@1:
duke@1: public TreePath getPath(CompilationUnitTree unit, Tree node) {
duke@1: return TreePath.getPath(unit, node);
duke@1: }
duke@1:
duke@1: public TreePath getPath(Element e) {
duke@1: return getPath(e, null, null);
duke@1: }
duke@1:
duke@1: public TreePath getPath(Element e, AnnotationMirror a) {
duke@1: return getPath(e, a, null);
duke@1: }
duke@1:
duke@1: public TreePath getPath(Element e, AnnotationMirror a, AnnotationValue v) {
duke@1: final Pair treeTopLevel = elements.getTreeAndTopLevel(e, a, v);
duke@1: if (treeTopLevel == null)
duke@1: return null;
duke@1: return TreePath.getPath(treeTopLevel.snd, treeTopLevel.fst);
duke@1: }
duke@1:
duke@1: public Element getElement(TreePath path) {
duke@1: Tree t = path.getLeaf();
duke@1: return TreeInfo.symbolFor((JCTree) t);
duke@1: }
duke@1:
duke@1: public TypeMirror getTypeMirror(TreePath path) {
duke@1: Tree t = path.getLeaf();
duke@1: return ((JCTree)t).type;
duke@1: }
duke@1:
duke@1: public JavacScope getScope(TreePath path) {
duke@1: return new JavacScope(getAttrContext(path));
duke@1: }
duke@1:
duke@1: public boolean isAccessible(Scope scope, TypeElement type) {
duke@1: if (scope instanceof JavacScope && type instanceof ClassSymbol) {
duke@1: Env env = ((JavacScope) scope).env;
duke@1: return resolve.isAccessible(env, (ClassSymbol)type);
duke@1: } else
duke@1: return false;
duke@1: }
duke@1:
duke@1: public boolean isAccessible(Scope scope, Element member, DeclaredType type) {
duke@1: if (scope instanceof JavacScope
duke@1: && member instanceof Symbol
duke@1: && type instanceof com.sun.tools.javac.code.Type) {
duke@1: Env env = ((JavacScope) scope).env;
duke@1: return resolve.isAccessible(env, (com.sun.tools.javac.code.Type)type, (Symbol)member);
duke@1: } else
duke@1: return false;
duke@1: }
duke@1:
duke@1: private Env getAttrContext(TreePath path) {
duke@1: if (!(path.getLeaf() instanceof JCTree)) // implicit null-check
duke@1: throw new IllegalArgumentException();
duke@1:
duke@1: // if we're being invoked via from a JSR199 client, we need to make sure
duke@1: // all the classes have been entered; if we're being invoked from JSR269,
duke@1: // then the classes will already have been entered.
duke@1: if (javacTaskImpl != null) {
duke@1: try {
duke@1: javacTaskImpl.enter(null);
duke@1: } catch (IOException e) {
duke@1: throw new Error("unexpected error while entering symbols: " + e);
duke@1: }
duke@1: }
duke@1:
duke@1:
duke@1: JCCompilationUnit unit = (JCCompilationUnit) path.getCompilationUnit();
duke@1: Copier copier = new Copier(treeMaker.forToplevel(unit));
duke@1:
duke@1: Env env = null;
duke@1: JCMethodDecl method = null;
duke@1: JCVariableDecl field = null;
duke@1:
duke@1: List l = List.nil();
duke@1: TreePath p = path;
duke@1: while (p != null) {
duke@1: l = l.prepend(p.getLeaf());
duke@1: p = p.getParentPath();
duke@1: }
duke@1:
duke@1: for ( ; l.nonEmpty(); l = l.tail) {
duke@1: Tree tree = l.head;
duke@1: switch (tree.getKind()) {
duke@1: case COMPILATION_UNIT:
duke@1: // System.err.println("COMP: " + ((JCCompilationUnit)tree).sourcefile);
duke@1: env = enter.getTopLevelEnv((JCCompilationUnit)tree);
duke@1: break;
duke@1: case CLASS:
duke@1: // System.err.println("CLASS: " + ((JCClassDecl)tree).sym.getSimpleName());
duke@1: env = enter.getClassEnv(((JCClassDecl)tree).sym);
duke@1: break;
duke@1: case METHOD:
duke@1: // System.err.println("METHOD: " + ((JCMethodDecl)tree).sym.getSimpleName());
duke@1: method = (JCMethodDecl)tree;
duke@1: break;
duke@1: case VARIABLE:
duke@1: // System.err.println("FIELD: " + ((JCVariableDecl)tree).sym.getSimpleName());
duke@1: field = (JCVariableDecl)tree;
duke@1: break;
duke@1: case BLOCK: {
duke@1: // System.err.println("BLOCK: ");
duke@1: if (method != null)
duke@1: env = memberEnter.getMethodEnv(method, env);
duke@1: JCTree body = copier.copy((JCTree)tree, (JCTree) path.getLeaf());
duke@1: env = attribStatToTree(body, env, copier.leafCopy);
duke@1: return env;
duke@1: }
duke@1: default:
duke@1: // System.err.println("DEFAULT: " + tree.getKind());
duke@1: if (field != null && field.getInitializer() == tree) {
duke@1: env = memberEnter.getInitEnv(field, env);
duke@1: JCExpression expr = copier.copy((JCExpression)tree, (JCTree) path.getLeaf());
duke@1: env = attribExprToTree(expr, env, copier.leafCopy);
duke@1: return env;
duke@1: }
duke@1: }
duke@1: }
duke@1: return field != null ? memberEnter.getInitEnv(field, env) : env;
duke@1: }
duke@1:
duke@1: private Env attribStatToTree(JCTree stat, Envenv, JCTree tree) {
duke@1: JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
duke@1: try {
duke@1: return attr.attribStatToTree(stat, env, tree);
duke@1: } finally {
duke@1: log.useSource(prev);
duke@1: }
duke@1: }
duke@1:
duke@1: private Env attribExprToTree(JCExpression expr, Envenv, JCTree tree) {
duke@1: JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
duke@1: try {
duke@1: return attr.attribExprToTree(expr, env, tree);
duke@1: } finally {
duke@1: log.useSource(prev);
duke@1: }
duke@1: }
duke@1:
duke@1: /**
duke@1: * Makes a copy of a tree, noting the value resulting from copying a particular leaf.
duke@1: **/
duke@1: static class Copier extends TreeCopier {
duke@1: JCTree leafCopy = null;
duke@1:
duke@1: Copier(TreeMaker M) {
duke@1: super(M);
duke@1: }
duke@1:
duke@1: public T copy(T t, JCTree leaf) {
duke@1: T t2 = super.copy(t, leaf);
duke@1: if (t == leaf)
duke@1: leafCopy = t2;
duke@1: return t2;
duke@1: }
duke@1: }
duke@1: }