jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/api/JavacTrees.java@8dd528992c15 (annotated)

src/share/classes/com/sun/tools/javac/api/JavacTrees.java@8dd528992c15 (annotated)

src/share/classes/com/sun/tools/javac/api/JavacTrees.java

Fri, 10 May 2013 15:15:50 +0200

author: jlahoda
date: Fri, 10 May 2013 15:15:50 +0200
changeset 1734: 8dd528992c15
parent 1726: a7ff36d06fa2
child 1853: 831467c4c6a7
permissions: -rw-r--r--

8012929: Trees.getElement should work not only for declaration trees, but also for use-trees
Reviewed-by: jjg
Contributed-by: Dusan Balek <dbalek@netbeans.org>, Jan Lahoda <jlahoda@netbeans.org>

 /*
  * Copyright (c) 2005, 2013, Oracle and/or its affiliates. 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.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.tools.javac.api;
 import java.io.IOException;
 import java.util.HashSet;
 import java.util.Set;
 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.ElementKind;
 import javax.lang.model.element.ExecutableElement;
 import javax.lang.model.element.TypeElement;
 import javax.lang.model.type.DeclaredType;
 import javax.lang.model.type.TypeKind;
 import javax.lang.model.type.TypeMirror;
 import javax.tools.Diagnostic;
 import javax.tools.JavaCompiler;
 import javax.tools.JavaFileObject;
 import com.sun.source.doctree.DocCommentTree;
 import com.sun.source.doctree.DocTree;
 import com.sun.source.tree.CatchTree;
 import com.sun.source.tree.CompilationUnitTree;
 import com.sun.source.tree.Scope;
 import com.sun.source.tree.Tree;
 import com.sun.source.util.DocSourcePositions;
 import com.sun.source.util.DocTreePath;
 import com.sun.source.util.DocTreeScanner;
 import com.sun.source.util.DocTrees;
 import com.sun.source.util.JavacTask;
 import com.sun.source.util.TreePath;
 import com.sun.tools.javac.code.Flags;
 import com.sun.tools.javac.code.Kinds;
 import com.sun.tools.javac.code.Symbol;
 import com.sun.tools.javac.code.Symbol.ClassSymbol;
 import com.sun.tools.javac.code.Symbol.MethodSymbol;
 import com.sun.tools.javac.code.Symbol.PackageSymbol;
 import com.sun.tools.javac.code.Symbol.TypeSymbol;
 import com.sun.tools.javac.code.Symbol.VarSymbol;
 import com.sun.tools.javac.code.Type;
 import com.sun.tools.javac.code.Type.ArrayType;
 import com.sun.tools.javac.code.Type.ClassType;
 import com.sun.tools.javac.code.Type.ErrorType;
 import com.sun.tools.javac.code.Type.UnionClassType;
 import com.sun.tools.javac.code.Types;
 import com.sun.tools.javac.code.Types.TypeRelation;
 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.DCTree;
 import com.sun.tools.javac.tree.DCTree.DCBlockTag;
 import com.sun.tools.javac.tree.DCTree.DCDocComment;
 import com.sun.tools.javac.tree.DCTree.DCEndPosTree;
 import com.sun.tools.javac.tree.DCTree.DCErroneous;
 import com.sun.tools.javac.tree.DCTree.DCIdentifier;
 import com.sun.tools.javac.tree.DCTree.DCParam;
 import com.sun.tools.javac.tree.DCTree.DCReference;
 import com.sun.tools.javac.tree.DCTree.DCText;
 import com.sun.tools.javac.tree.EndPosTable;
 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.Abort;
 import com.sun.tools.javac.util.Assert;
 import com.sun.tools.javac.util.Context;
 import com.sun.tools.javac.util.JCDiagnostic;
 import com.sun.tools.javac.util.List;
 import com.sun.tools.javac.util.ListBuffer;
 import com.sun.tools.javac.util.Log;
 import com.sun.tools.javac.util.Name;
 import com.sun.tools.javac.util.Names;
 import com.sun.tools.javac.util.Pair;
 import com.sun.tools.javac.util.Position;
 import static com.sun.tools.javac.code.TypeTag.*;
 /**
  * Provides an implementation of Trees.
  *
  * <p><b>This is NOT part of any supported API.
  * 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 Ah&eacute;
  */
 public class JavacTrees extends DocTrees {
     // in a world of a single context per compilation, these would all be final
     private Resolve resolve;
     private Enter enter;
     private Log log;
     private MemberEnter memberEnter;
     private Attr attr;
     private TreeMaker treeMaker;
     private JavacElements elements;
     private JavacTaskImpl javacTaskImpl;
     private Names names;
     private Types types;
     // called reflectively from Trees.instance(CompilationTask task)
     public static JavacTrees instance(JavaCompiler.CompilationTask task) {
         if (!(task instanceof BasicJavacTask))
             throw new IllegalArgumentException();
         return instance(((BasicJavacTask)task).getContext());
     }
     // called reflectively from Trees.instance(ProcessingEnvironment env)
     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;
     }
     protected JavacTrees(Context context) {
         context.put(JavacTrees.class, this);
         init(context);
     }
     public void updateContext(Context context) {
         init(context);
     }
     private void init(Context context) {
         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);
         names = Names.instance(context);
         types = Types.instance(context);
         JavacTask t = context.get(JavacTask.class);
         if (t instanceof JavacTaskImpl)
             javacTaskImpl = (JavacTaskImpl) t;
     }
     public DocSourcePositions getSourcePositions() {
         return new DocSourcePositions() {
                 public long getStartPosition(CompilationUnitTree file, Tree tree) {
                     return TreeInfo.getStartPos((JCTree) tree);
                 }
                 public long getEndPosition(CompilationUnitTree file, Tree tree) {
                     EndPosTable endPosTable = ((JCCompilationUnit) file).endPositions;
                     return TreeInfo.getEndPos((JCTree) tree, endPosTable);
                 }
                 public long getStartPosition(CompilationUnitTree file, DocCommentTree comment, DocTree tree) {
                     return ((DCTree) tree).getSourcePosition((DCDocComment) comment);
                 }
                 @SuppressWarnings("fallthrough")
                 public long getEndPosition(CompilationUnitTree file, DocCommentTree comment, DocTree tree) {
                     DCDocComment dcComment = (DCDocComment) comment;
                     if (tree instanceof DCEndPosTree) {
                         int endPos = ((DCEndPosTree) tree).getEndPos(dcComment);
                         if (endPos != Position.NOPOS) {
                             return endPos;
                         }
                     }
                     int correction = 0;
                     switch (tree.getKind()) {
                         case TEXT:
                             DCText text = (DCText) tree;
                             return dcComment.comment.getSourcePos(text.pos + text.text.length());
                         case ERRONEOUS:
                             DCErroneous err = (DCErroneous) tree;
                             return dcComment.comment.getSourcePos(err.pos + err.body.length());
                         case IDENTIFIER:
                             DCIdentifier ident = (DCIdentifier) tree;
                             return dcComment.comment.getSourcePos(ident.pos + (ident.name != names.error ? ident.name.length() : 0));
                         case PARAM:
                             DCParam param = (DCParam) tree;
                             if (param.isTypeParameter && param.getDescription().isEmpty()) {
                                 correction = 1;
                             }
                         case AUTHOR: case DEPRECATED: case RETURN: case SEE:
                         case SERIAL: case SERIAL_DATA: case SERIAL_FIELD: case SINCE:
                         case THROWS: case UNKNOWN_BLOCK_TAG: case VERSION: {
                             DocTree last = getLastChild(tree);
                             if (last != null) {
                                 return getEndPosition(file, comment, last) + correction;
                             }
                             DCBlockTag block = (DCBlockTag) tree;
                             return dcComment.comment.getSourcePos(block.pos + block.getTagName().length() + 1);
                         }
                         default:
                             DocTree last = getLastChild(tree);
                             if (last != null) {
                                 return getEndPosition(file, comment, last);
                             }
                             break;
                     }
                     return Position.NOPOS;
                 }
             };
     }
     private DocTree getLastChild(DocTree tree) {
         final DocTree[] last = new DocTree[] {null};
         tree.accept(new DocTreeScanner<Void, Void>() {
             @Override public Void scan(DocTree node, Void p) {
                 if (node != null) last[0] = node;
                 return null;
             }
         }, null);
         return last[0];
     }
     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 Symbol getElement(TreePath path) {
         JCTree tree = (JCTree) path.getLeaf();
         Symbol sym = TreeInfo.symbolFor(tree);
         if (sym == null) {
             if (TreeInfo.isDeclaration(tree)) {
                 for (TreePath p = path; p != null; p = p.getParentPath()) {
                     JCTree t = (JCTree) p.getLeaf();
                     if (t.hasTag(JCTree.Tag.CLASSDEF)) {
                         JCClassDecl ct = (JCClassDecl) t;
                         if (ct.sym != null) {
                             if ((ct.sym.flags_field & Flags.UNATTRIBUTED) != 0) {
                                 attr.attribClass(ct.pos(), ct.sym);
                                 sym = TreeInfo.symbolFor(tree);
                             }
                             break;
                         }
                     }
                 }
             }
         }
         return sym;
     }
     @Override
     public Element getElement(DocTreePath path) {
         DocTree forTree = path.getLeaf();
         if (forTree instanceof DCReference)
             return attributeDocReference(path.getTreePath(), ((DCReference) forTree));
         if (forTree instanceof DCIdentifier) {
             if (path.getParentPath().getLeaf() instanceof DCParam) {
                 return attributeParamIdentifier(path.getTreePath(), (DCParam) path.getParentPath().getLeaf());
             }
         }
         return null;
     }
     private Symbol attributeDocReference(TreePath path, DCReference ref) {
         Env<AttrContext> env = getAttrContext(path);
         Log.DeferredDiagnosticHandler deferredDiagnosticHandler =
                 new Log.DeferredDiagnosticHandler(log);
         try {
             final ClassSymbol tsym;
             final Name memberName;
             if (ref.qualifierExpression == null) {
                 tsym = env.enclClass.sym;
                 memberName = ref.memberName;
             } else {
                 // See if the qualifierExpression is a type or package name.
                 // javac does not provide the exact method required, so
                 // we first check if qualifierExpression identifies a type,
                 // and if not, then we check to see if it identifies a package.
                 Type t = attr.attribType(ref.qualifierExpression, env);
                 if (t.isErroneous()) {
                     if (ref.memberName == null) {
                         // Attr/Resolve assume packages exist and create symbols as needed
                         // so use getPackageElement to restrict search to existing packages
                         PackageSymbol pck = elements.getPackageElement(ref.qualifierExpression.toString());
                         if (pck != null) {
                             return pck;
                         } else if (ref.qualifierExpression.hasTag(JCTree.Tag.IDENT)) {
                             // fixup:  allow "identifier" instead of "#identifier"
                             // for compatibility with javadoc
                             tsym = env.enclClass.sym;
                             memberName = ((JCIdent) ref.qualifierExpression).name;
                         } else
                             return null;
                     } else {
                         return null;
                     }
                 } else {
                     tsym = (ClassSymbol) t.tsym;
                     memberName = ref.memberName;
                 }
             }
             if (memberName == null)
                 return tsym;
             final List<Type> paramTypes;
             if (ref.paramTypes == null)
                 paramTypes = null;
             else {
                 ListBuffer<Type> lb = new ListBuffer<Type>();
                 for (List<JCTree> l = ref.paramTypes; l.nonEmpty(); l = l.tail) {
                     JCTree tree = l.head;
                     Type t = attr.attribType(tree, env);
                     lb.add(t);
                 }
                 paramTypes = lb.toList();
             }
             Symbol msym = (memberName == tsym.name)
                     ? findConstructor(tsym, paramTypes)
                     : findMethod(tsym, memberName, paramTypes);
             if (paramTypes != null) {
                 // explicit (possibly empty) arg list given, so cannot be a field
                 return msym;
             }
             VarSymbol vsym = (ref.paramTypes != null) ? null : findField(tsym, memberName);
             // prefer a field over a method with no parameters
             if (vsym != null &&
                     (msym == null ||
                         types.isSubtypeUnchecked(vsym.enclClass().asType(), msym.enclClass().asType()))) {
                 return vsym;
             } else {
                 return msym;
             }
         } catch (Abort e) { // may be thrown by Check.completionError in case of bad class file
             return null;
         } finally {
             log.popDiagnosticHandler(deferredDiagnosticHandler);
         }
     }
     private Symbol attributeParamIdentifier(TreePath path, DCParam ptag) {
         Symbol javadocSymbol = getElement(path);
         if (javadocSymbol == null)
             return null;
         ElementKind kind = javadocSymbol.getKind();
         List<? extends Symbol> params = List.nil();
         if (kind == ElementKind.METHOD || kind == ElementKind.CONSTRUCTOR) {
             MethodSymbol ee = (MethodSymbol) javadocSymbol;
             params = ptag.isTypeParameter()
                     ? ee.getTypeParameters()
                     : ee.getParameters();
         } else if (kind.isClass() || kind.isInterface()) {
             ClassSymbol te = (ClassSymbol) javadocSymbol;
             params = te.getTypeParameters();
         }
         for (Symbol param : params) {
             if (param.getSimpleName() == ptag.getName().getName()) {
                 return param;
             }
         }
         return null;
     }
     /** @see com.sun.tools.javadoc.ClassDocImpl#findField */
     private VarSymbol findField(ClassSymbol tsym, Name fieldName) {
         return searchField(tsym, fieldName, new HashSet<ClassSymbol>());
     }
     /** @see com.sun.tools.javadoc.ClassDocImpl#searchField */
     private VarSymbol searchField(ClassSymbol tsym, Name fieldName, Set<ClassSymbol> searched) {
         if (searched.contains(tsym)) {
             return null;
         }
         searched.add(tsym);
         for (com.sun.tools.javac.code.Scope.Entry e = tsym.members().lookup(fieldName);
                 e.scope != null; e = e.next()) {
             if (e.sym.kind == Kinds.VAR) {
                 return (VarSymbol)e.sym;
             }
         }
         //### If we found a VarSymbol above, but which did not pass
         //### the modifier filter, we should return failure here!
         ClassSymbol encl = tsym.owner.enclClass();
         if (encl != null) {
             VarSymbol vsym = searchField(encl, fieldName, searched);
             if (vsym != null) {
                 return vsym;
             }
         }
         // search superclass
         Type superclass = tsym.getSuperclass();
         if (superclass.tsym != null) {
             VarSymbol vsym = searchField((ClassSymbol) superclass.tsym, fieldName, searched);
             if (vsym != null) {
                 return vsym;
             }
         }
         // search interfaces
         List<Type> intfs = tsym.getInterfaces();
         for (List<Type> l = intfs; l.nonEmpty(); l = l.tail) {
             Type intf = l.head;
             if (intf.isErroneous()) continue;
             VarSymbol vsym = searchField((ClassSymbol) intf.tsym, fieldName, searched);
             if (vsym != null) {
                 return vsym;
             }
         }
         return null;
     }
     /** @see com.sun.tools.javadoc.ClassDocImpl#findConstructor */
     MethodSymbol findConstructor(ClassSymbol tsym, List<Type> paramTypes) {
         for (com.sun.tools.javac.code.Scope.Entry e = tsym.members().lookup(names.init);
                 e.scope != null; e = e.next()) {
             if (e.sym.kind == Kinds.MTH) {
                 if (hasParameterTypes((MethodSymbol) e.sym, paramTypes)) {
                     return (MethodSymbol) e.sym;
                 }
             }
         }
         return null;
     }
     /** @see com.sun.tools.javadoc.ClassDocImpl#findMethod */
     private MethodSymbol findMethod(ClassSymbol tsym, Name methodName, List<Type> paramTypes) {
         return searchMethod(tsym, methodName, paramTypes, new HashSet<ClassSymbol>());
     }
     /** @see com.sun.tools.javadoc.ClassDocImpl#searchMethod */
     private MethodSymbol searchMethod(ClassSymbol tsym, Name methodName,
                                        List<Type> paramTypes, Set<ClassSymbol> searched) {
         //### Note that this search is not necessarily what the compiler would do!
         // do not match constructors
         if (methodName == names.init)
             return null;
         if (searched.contains(tsym))
             return null;
         searched.add(tsym);
         // search current class
         com.sun.tools.javac.code.Scope.Entry e = tsym.members().lookup(methodName);
         //### Using modifier filter here isn't really correct,
         //### but emulates the old behavior.  Instead, we should
         //### apply the normal rules of visibility and inheritance.
         if (paramTypes == null) {
             // If no parameters specified, we are allowed to return
             // any method with a matching name.  In practice, the old
             // code returned the first method, which is now the last!
             // In order to provide textually identical results, we
             // attempt to emulate the old behavior.
             MethodSymbol lastFound = null;
             for (; e.scope != null; e = e.next()) {
                 if (e.sym.kind == Kinds.MTH) {
                     if (e.sym.name == methodName) {
                         lastFound = (MethodSymbol)e.sym;
                     }
                 }
             }
             if (lastFound != null) {
                 return lastFound;
             }
         } else {
             for (; e.scope != null; e = e.next()) {
                 if (e.sym != null &&
                     e.sym.kind == Kinds.MTH) {
                     if (hasParameterTypes((MethodSymbol) e.sym, paramTypes)) {
                         return (MethodSymbol) e.sym;
                     }
                 }
             }
         }
         //### If we found a MethodSymbol above, but which did not pass
         //### the modifier filter, we should return failure here!
         // search superclass
         Type superclass = tsym.getSuperclass();
         if (superclass.tsym != null) {
             MethodSymbol msym = searchMethod((ClassSymbol) superclass.tsym, methodName, paramTypes, searched);
             if (msym != null) {
                 return msym;
             }
         }
         // search interfaces
         List<Type> intfs = tsym.getInterfaces();
         for (List<Type> l = intfs; l.nonEmpty(); l = l.tail) {
             Type intf = l.head;
             if (intf.isErroneous()) continue;
             MethodSymbol msym = searchMethod((ClassSymbol) intf.tsym, methodName, paramTypes, searched);
             if (msym != null) {
                 return msym;
             }
         }
         // search enclosing class
         ClassSymbol encl = tsym.owner.enclClass();
         if (encl != null) {
             MethodSymbol msym = searchMethod(encl, methodName, paramTypes, searched);
             if (msym != null) {
                 return msym;
             }
         }
         return null;
     }
     /** @see com.sun.tools.javadoc.ClassDocImpl */
     private boolean hasParameterTypes(MethodSymbol method, List<Type> paramTypes) {
         if (paramTypes == null)
             return true;
         if (method.params().size() != paramTypes.size())
             return false;
         List<Type> methodParamTypes = types.erasureRecursive(method.asType()).getParameterTypes();
         return (Type.isErroneous(paramTypes))
             ? fuzzyMatch(paramTypes, methodParamTypes)
             : types.isSameTypes(paramTypes, methodParamTypes);
     }
     boolean fuzzyMatch(List<Type> paramTypes, List<Type> methodParamTypes) {
         List<Type> l1 = paramTypes;
         List<Type> l2 = methodParamTypes;
         while (l1.nonEmpty()) {
             if (!fuzzyMatch(l1.head, l2.head))
                 return false;
             l1 = l1.tail;
             l2 = l2.tail;
         }
         return true;
     }
     boolean fuzzyMatch(Type paramType, Type methodParamType) {
         Boolean b = fuzzyMatcher.visit(paramType, methodParamType);
         return (b == Boolean.TRUE);
     }
     TypeRelation fuzzyMatcher = new TypeRelation() {
         @Override
         public Boolean visitType(Type t, Type s) {
             if (t == s)
                 return true;
             if (s.isPartial())
                 return visit(s, t);
             switch (t.getTag()) {
             case BYTE: case CHAR: case SHORT: case INT: case LONG: case FLOAT:
             case DOUBLE: case BOOLEAN: case VOID: case BOT: case NONE:
                 return t.getTag() == s.getTag();
             default:
                 throw new AssertionError("fuzzyMatcher " + t.getTag());
             }
         }
         @Override
         public Boolean visitArrayType(ArrayType t, Type s) {
             if (t == s)
                 return true;
             if (s.isPartial())
                 return visit(s, t);
             return s.getTag() == ARRAY
                 && visit(t.elemtype, types.elemtype(s));
         }
         @Override
         public Boolean visitClassType(ClassType t, Type s) {
             if (t == s)
                 return true;
             if (s.isPartial())
                 return visit(s, t);
             return t.tsym == s.tsym;
         }
         @Override
         public Boolean visitErrorType(ErrorType t, Type s) {
             return s.getTag() == CLASS
                     && t.tsym.name == ((ClassType) s).tsym.name;
         }
     };
     public TypeMirror getTypeMirror(TreePath path) {
         Tree t = path.getLeaf();
         return ((JCTree)t).type;
     }
     public JavacScope getScope(TreePath path) {
         return new JavacScope(getAttrContext(path));
     }
     public String getDocComment(TreePath path) {
         CompilationUnitTree t = path.getCompilationUnit();
         Tree leaf = path.getLeaf();
         if (t instanceof JCTree.JCCompilationUnit && leaf instanceof JCTree) {
             JCCompilationUnit cu = (JCCompilationUnit) t;
             if (cu.docComments != null) {
                 return cu.docComments.getCommentText((JCTree) leaf);
             }
         }
         return null;
     }
     public DocCommentTree getDocCommentTree(TreePath path) {
         CompilationUnitTree t = path.getCompilationUnit();
         Tree leaf = path.getLeaf();
         if (t instanceof JCTree.JCCompilationUnit && leaf instanceof JCTree) {
             JCCompilationUnit cu = (JCCompilationUnit) t;
             if (cu.docComments != null) {
                 return cu.docComments.getCommentTree((JCTree) leaf);
             }
         }
         return null;
     }
     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, true);
         } 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, true);
         } 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 from a Tree API client via parse/enter/analyze,
         // we need to make sure all the classes have been entered;
         // if we're being invoked from JSR 199 or JSR 269, 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 = createCopier(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 ANNOTATION_TYPE:
                 case CLASS:
                 case ENUM:
                 case INTERFACE:
 //                    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) {
                         try {
                             Assert.check(method.body == tree);
                             method.body = copier.copy((JCBlock)tree, (JCTree) path.getLeaf());
                             env = memberEnter.getMethodEnv(method, env);
                             env = attribStatToTree(method.body, env, copier.leafCopy);
                         } finally {
                             method.body = (JCBlock) tree;
                         }
                     } else {
                         JCBlock body = copier.copy((JCBlock)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.
      **/
     protected static class Copier extends TreeCopier<JCTree> {
         JCTree leafCopy = null;
         protected Copier(TreeMaker M) {
             super(M);
         }
         @Override
         public <T extends JCTree> T copy(T t, JCTree leaf) {
             T t2 = super.copy(t, leaf);
             if (t == leaf)
                 leafCopy = t2;
             return t2;
         }
     }
     protected Copier createCopier(TreeMaker maker) {
         return new Copier(maker);
     }
     /**
      * Gets the original type from the ErrorType object.
      * @param errorType The errorType for which we want to get the original type.
      * @returns TypeMirror corresponding to the original type, replaced by the ErrorType.
      *          noType (type.tag == NONE) is returned if there is no original type.
      */
     public TypeMirror getOriginalType(javax.lang.model.type.ErrorType errorType) {
         if (errorType instanceof com.sun.tools.javac.code.Type.ErrorType) {
             return ((com.sun.tools.javac.code.Type.ErrorType)errorType).getOriginalType();
         }
         return com.sun.tools.javac.code.Type.noType;
     }
     /**
      * Prints a message of the specified kind at the location of the
      * tree within the provided compilation unit
      *
      * @param kind the kind of message
      * @param msg  the message, or an empty string if none
      * @param t    the tree to use as a position hint
      * @param root the compilation unit that contains tree
      */
     public void printMessage(Diagnostic.Kind kind, CharSequence msg,
             com.sun.source.tree.Tree t,
             com.sun.source.tree.CompilationUnitTree root) {
         printMessage(kind, msg, ((JCTree) t).pos(), root);
     }
     public void printMessage(Diagnostic.Kind kind, CharSequence msg,
             com.sun.source.doctree.DocTree t,
             com.sun.source.doctree.DocCommentTree c,
             com.sun.source.tree.CompilationUnitTree root) {
         printMessage(kind, msg, ((DCTree) t).pos((DCDocComment) c), root);
     }
     private void printMessage(Diagnostic.Kind kind, CharSequence msg,
             JCDiagnostic.DiagnosticPosition pos,
             com.sun.source.tree.CompilationUnitTree root) {
         JavaFileObject oldSource = null;
         JavaFileObject newSource = null;
         newSource = root.getSourceFile();
         if (newSource == null) {
             pos = null;
         } else {
             oldSource = log.useSource(newSource);
         }
         try {
             switch (kind) {
             case ERROR:
                 boolean prev = log.multipleErrors;
                 try {
                     log.error(pos, "proc.messager", msg.toString());
                 } finally {
                     log.multipleErrors = prev;
                 }
                 break;
             case WARNING:
                 log.warning(pos, "proc.messager", msg.toString());
                 break;
             case MANDATORY_WARNING:
                 log.mandatoryWarning(pos, "proc.messager", msg.toString());
                 break;
             default:
                 log.note(pos, "proc.messager", msg.toString());
             }
         } finally {
             if (oldSource != null)
                 log.useSource(oldSource);
         }
     }
     @Override
     public TypeMirror getLub(CatchTree tree) {
         JCCatch ct = (JCCatch) tree;
         JCVariableDecl v = ct.param;
         if (v.type != null && v.type.getKind() == TypeKind.UNION) {
             UnionClassType ut = (UnionClassType) v.type;
             return ut.getLub();
         } else {
             return v.type;
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/api/JavacTrees.java@8dd528992c15 (annotated)

src/share/classes/com/sun/tools/javac/api/JavacTrees.java