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"nb-javac" is a patched version of OpenJDK "javac", i.e., the Java compiler. This has long been part of NetBeans, providing a highly tuned Java compiler specifically for the Java editor i.e., parsing and lexing for features such as syntax coloring, code completion.
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/*
* Copyright (c) 2005, 2021, 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.FileNotFoundException;
import java.io.IOException;
import java.text.BreakIterator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.WeakHashMap;
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.Modifier;
import javax.lang.model.element.NestingKind;
import javax.lang.model.element.PackageElement;
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.FileObject;
import javax.tools.ForwardingFileObject;
import javax.tools.JavaCompiler;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
import javax.tools.JavaFileObject.Kind;
import javax.tools.StandardLocation;
import com.sun.source.doctree.DocCommentTree;
import com.sun.source.doctree.DocTree;
import com.sun.source.doctree.EntityTree;
import com.sun.source.tree.CatchTree;
import com.sun.source.tree.ClassTree;
import com.sun.source.tree.CompilationUnitTree;
import com.sun.source.tree.Scope;
import com.sun.source.tree.Tree;
import com.sun.source.tree.VariableTree;
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.Scope.NamedImportScope;
import com.sun.tools.javac.code.Scope.StarImportScope;
import com.sun.tools.javac.code.Scope.WriteableScope;
import com.sun.tools.javac.code.Symbol.ClassSymbol;
import com.sun.tools.javac.code.Symbol.MethodSymbol;
import com.sun.tools.javac.code.Symbol.ModuleSymbol;
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.ArgumentAttr;
import com.sun.tools.javac.comp.Attr;
import com.sun.tools.javac.comp.AttrContext;
import com.sun.tools.javac.comp.Check;
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.Modules;
import com.sun.tools.javac.comp.Resolve;
import com.sun.tools.javac.comp.TypeEnter;
import com.sun.tools.javac.file.BaseFileManager;
import com.sun.tools.javac.jvm.ClassReader;
import com.sun.tools.javac.model.JavacElements;
import com.sun.tools.javac.parser.DocCommentParser;
import com.sun.tools.javac.parser.ParserFactory;
import com.sun.tools.javac.parser.Tokens.Comment;
import com.sun.tools.javac.processing.JavacProcessingEnvironment;
import com.sun.tools.javac.resources.CompilerProperties.Errors;
import com.sun.tools.javac.resources.CompilerProperties.Notes;
import com.sun.tools.javac.resources.CompilerProperties.Warnings;
import com.sun.tools.javac.tree.DCTree;
import com.sun.tools.javac.tree.DCTree.DCBlockTag;
import com.sun.tools.javac.tree.DCTree.DCComment;
import com.sun.tools.javac.tree.DCTree.DCDocComment;
import com.sun.tools.javac.tree.DCTree.DCEndElement;
import com.sun.tools.javac.tree.DCTree.DCEndPosTree;
import com.sun.tools.javac.tree.DCTree.DCEntity;
import com.sun.tools.javac.tree.DCTree.DCErroneous;
import com.sun.tools.javac.tree.DCTree.DCIdentifier;
import com.sun.tools.javac.tree.DCTree.DCInlineTag;
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.DocCommentTable;
import com.sun.tools.javac.tree.DocTreeMaker;
import com.sun.tools.javac.tree.EndPosTable;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.JCBlock;
import com.sun.tools.javac.tree.JCTree.JCCatch;
import com.sun.tools.javac.tree.JCTree.JCClassDecl;
import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import com.sun.tools.javac.tree.JCTree.JCIdent;
import com.sun.tools.javac.tree.JCTree.JCMethodDecl;
import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
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.tree.TreeScanner;
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.DefinedBy;
import com.sun.tools.javac.util.DefinedBy.Api;
import com.sun.tools.javac.util.DiagnosticSource;
import com.sun.tools.javac.util.JCDiagnostic;
import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag;
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.Kinds.Kind.*;
import com.sun.tools.javac.code.Symbol;
import com.sun.tools.javac.code.Symtab;
import static com.sun.tools.javac.code.TypeTag.*;
/**
* Provides an implementation of Trees.
*
* 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.
*
* @author Peter von der Ahé
*/
public class JavacTrees extends DocTrees {
// in a world of a single context per compilation, these would all be final
private Modules modules;
private Resolve resolve;
private Enter enter;
private Log log;
private TypeEnter typeEnter;
private MemberEnter memberEnter;
private Attr attr;
private Check chk;
private ArgumentAttr argumentAttr;
private TreeMaker treeMaker;
private JavacElements elements;
private JavacTaskImpl javacTaskImpl;
private Names names;
private Types types;
private DocTreeMaker docTreeMaker;
private BreakIterator breakIterator;
private JavaFileManager fileManager;
private ParserFactory parser;
private Symtab syms;
private com.sun.tools.javac.main.JavaCompiler compiler;
private final Map extraType2OriginalMap = new WeakHashMap<>();
// 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) {
this.breakIterator = null;
context.put(JavacTrees.class, this);
init(context);
}
public void updateContext(Context context) {
init(context);
}
private void init(Context context) {
//Need ensure ClassReader is initialized before Symtab:
ClassReader.instance(context);
modules = Modules.instance(context);
attr = Attr.instance(context);
chk = Check.instance(context);
argumentAttr = ArgumentAttr.instance(context);
enter = Enter.instance(context);
elements = JavacElements.instance(context);
log = Log.instance(context);
resolve = Resolve.instance(context);
treeMaker = TreeMaker.instance(context);
typeEnter = TypeEnter.instance(context);
memberEnter = MemberEnter.instance(context);
names = Names.instance(context);
types = Types.instance(context);
docTreeMaker = DocTreeMaker.instance(context);
parser = ParserFactory.instance(context);
syms = Symtab.instance(context);
fileManager = context.get(JavaFileManager.class);
JavacTask t = context.get(JavacTask.class);
if (t instanceof JavacTaskImpl)
javacTaskImpl = (JavacTaskImpl) t;
compiler = com.sun.tools.javac.main.JavaCompiler.instance(context);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public BreakIterator getBreakIterator() {
return breakIterator;
}
@Override @DefinedBy(Api.COMPILER_TREE)
public DocSourcePositions getSourcePositions() {
return new DocSourcePositions() {
@Override @DefinedBy(Api.COMPILER_TREE)
public long getStartPosition(CompilationUnitTree file, Tree tree) {
return TreeInfo.getStartPos((JCTree) tree);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public long getEndPosition(CompilationUnitTree file, Tree tree) {
EndPosTable endPosTable = ((JCCompilationUnit) file).endPositions;
return TreeInfo.getEndPos((JCTree) tree, endPosTable);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public long getStartPosition(CompilationUnitTree file, DocCommentTree comment, DocTree tree) {
return ((DCTree) tree).getSourcePosition((DCDocComment) comment);
}
@Override @DefinedBy(Api.COMPILER_TREE) @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;
}
int pos;
String name;
if (tree.getKind() == DocTree.Kind.RETURN) {
DCTree.DCReturn dcReturn = (DCTree.DCReturn) tree;
pos = dcReturn.pos;
name = dcReturn.getTagName();
} else {
DCBlockTag block = (DCBlockTag) tree;
pos = block.pos;
name = block.getTagName();
}
return dcComment.comment.getSourcePos(pos + name.length() + 1);
}
case UNKNOWN_INLINE_TAG: {
DocTree last = getLastChild(tree);
if (last != null) {
return getEndPosition(file, comment, last) + correction;
}
DCInlineTag inline = (DCInlineTag) tree;
return dcComment.comment.getSourcePos(inline.pos + inline.getTagName().length() + 1);
}
case END_ELEMENT: {
DCEndElement endEl = (DCEndElement) tree;
return dcComment.comment.getSourcePos(endEl.pos + (endEl.name != names.error ? endEl.name.length() : 0) + 3);
}
case ENTITY: {
DCEntity endEl = (DCEntity) tree;
return dcComment.comment.getSourcePos(endEl.pos + (endEl.name != names.error ? endEl.name.length() : 0) + 2);
}
case COMMENT: {
DCComment endEl = (DCComment) tree;
return dcComment.comment.getSourcePos(endEl.pos + endEl.body.length());
}
default:
DocTree last = getLastChild(tree);
if (last != null) {
return getEndPosition(file, comment, last);
}
break;
}
return Position.NOPOS;
}
};
}
@Override @DefinedBy(Api.COMPILER_TREE)
public DocTreeMaker getDocTreeFactory() {
return docTreeMaker;
}
private DocTree getLastChild(DocTree tree) {
final DocTree[] last = new DocTree[] {null};
tree.accept(new DocTreeScanner() {
@Override @DefinedBy(Api.COMPILER_TREE)
public Void scan(DocTree node, Void p) {
if (node != null) last[0] = node;
return null;
}
}, null);
return last[0];
}
@Override @DefinedBy(Api.COMPILER_TREE)
public JCClassDecl getTree(TypeElement element) {
return (JCClassDecl) getTree((Element) element);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public JCMethodDecl getTree(ExecutableElement method) {
return (JCMethodDecl) getTree((Element) method);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public JCTree getTree(Element element) {
return getTree(element, null);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public JCTree getTree(Element e, AnnotationMirror a) {
return getTree(e, a, null);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public JCTree getTree(Element e, AnnotationMirror a, AnnotationValue v) {
Pair treeTopLevel = elements.getTreeAndTopLevel(e, a, v);
if (treeTopLevel == null)
return null;
return treeTopLevel.fst;
}
@Override @DefinedBy(Api.COMPILER_TREE)
public TreePath getPath(CompilationUnitTree unit, Tree node) {
return TreePath.getPath(unit, node);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public TreePath getPath(Element e) {
return getPath(e, null, null);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public TreePath getPath(Element e, AnnotationMirror a) {
return getPath(e, a, null);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public TreePath getPath(Element e, AnnotationMirror a, AnnotationValue v) {
final Pair treeTopLevel = elements.getTreeAndTopLevel(e, a, v);
if (treeTopLevel == null)
return null;
return TreePath.getPath(treeTopLevel.snd, treeTopLevel.fst);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public Symbol getElement(TreePath path) {
JCTree tree = (JCTree) path.getLeaf();
Symbol sym = TreeInfo.symbolFor(tree);
if (sym == null) {
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 @DefinedBy(Api.COMPILER_TREE)
public Element getElement(DocTreePath path) {
DocTree tree = path.getLeaf();
if (tree instanceof DCReference)
return attributeDocReference(path.getTreePath(), ((DCReference) tree));
if (tree instanceof DCIdentifier) {
if (path.getParentPath().getLeaf() instanceof DCParam) {
return attributeParamIdentifier(path.getTreePath(), (DCParam) path.getParentPath().getLeaf());
}
}
return null;
}
@Override @DefinedBy(Api.COMPILER_TREE)
public TypeMirror getType(DocTreePath path) {
DocTree tree = path.getLeaf();
if (tree instanceof DCReference) {
JCTree qexpr = ((DCReference)tree).qualifierExpression;
if (qexpr != null) {
Log.DeferredDiagnosticHandler deferredDiagnosticHandler =
new Log.DeferredDiagnosticHandler(log);
try {
Env env = getAttrContext(path.getTreePath());
Type t = attr.attribType(((DCReference)tree).qualifierExpression, env);
if (t != null && !t.isErroneous()) {
return t;
}
} catch (Abort e) { // may be thrown by Check.completionError in case of bad class file
return null;
} finally {
log.popDiagnosticHandler(deferredDiagnosticHandler);
}
}
}
Element e = getElement(path);
return e == null ? null : e.asType();
}
@Override @DefinedBy(Api.COMPILER_TREE)
public java.util.List getFirstSentence(java.util.List list) {
return docTreeMaker.getFirstSentence(list);
}
private Symbol attributeDocReference(TreePath path, DCReference ref) {
Env env = getAttrContext(path);
if (env == null) return null;
if (ref.moduleName != null && ref.qualifierExpression == null && ref.memberName != null) {
// module name and member name without type
return null;
}
Log.DeferredDiagnosticHandler deferredDiagnosticHandler =
new Log.DeferredDiagnosticHandler(log);
try {
final TypeSymbol tsym;
final Name memberName;
final ModuleSymbol mdlsym;
if (ref.moduleName != null) {
mdlsym = modules.modulesInitialized() ?
modules.getObservableModule(names.fromString(ref.moduleName.toString()))
: null;
if (mdlsym == null) {
return null;
} else if (ref.qualifierExpression == null) {
return mdlsym;
}
} else {
mdlsym = modules.getDefaultModule();
}
if (ref.qualifierExpression == null) {
tsym = env.enclClass.sym;
memberName = (Name) ref.memberName;
} else {
// Check if qualifierExpression is a type or package, using the methods javac provides.
// If no module name is given we check if qualifierExpression identifies a type.
// If that fails or we have a module name, use that to resolve qualifierExpression to
// a package or type.
Type t = ref.moduleName == null ? attr.attribType(ref.qualifierExpression, env) : null;
if (t == null || t.isErroneous()) {
JCCompilationUnit toplevel =
treeMaker.TopLevel(List.nil());
toplevel.modle = mdlsym;
toplevel.packge = mdlsym.unnamedPackage;
Symbol sym = attr.attribIdent(ref.qualifierExpression, toplevel);
if (sym == null) {
return null;
}
sym.complete();
if ((sym.kind == PCK || sym.kind == TYP) && sym.exists()) {
tsym = (TypeSymbol) sym;
memberName = (Name) ref.memberName;
if (sym.kind == PCK && memberName != null) {
//cannot refer to a package "member"
return null;
}
} else {
if (modules.modulesInitialized() && ref.moduleName == null && ref.memberName == null) {
// package/type does not exist, check if there is a matching module
ModuleSymbol moduleSymbol = modules.getObservableModule(names.fromString(ref.signature));
if (moduleSymbol != null) {
return moduleSymbol;
}
}
if (ref.qualifierExpression.hasTag(JCTree.Tag.IDENT) && ref.moduleName == null
&& ref.memberName == null) {
// fixup: allow "identifier" instead of "#identifier"
// for compatibility with javadoc
tsym = env.enclClass.sym;
memberName = ((JCIdent) ref.qualifierExpression).name;
} else {
return null;
}
}
} else {
Type e = t;
// If this is an array type convert to element type
while (e instanceof ArrayType)
e = ((ArrayType)e).elemtype;
tsym = e.tsym;
memberName = (Name) ref.memberName;
}
}
if (memberName == null)
return tsym;
final List paramTypes;
if (ref.paramTypes == null)
paramTypes = null;
else {
ListBuffer lb = new ListBuffer<>();
for (List l = (List) ref.paramTypes; l.nonEmpty(); l = l.tail) {
JCTree tree = l.head;
Type t = attr.attribType(tree, env);
lb.add(t);
}
paramTypes = lb.toList();
}
ClassSymbol sym = (ClassSymbol) types.skipTypeVars(tsym.type, false).tsym;
Symbol msym = (memberName == sym.name)
? findConstructor(sym, paramTypes)
: findMethod(sym, 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(sym, 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 paramTag) {
Symbol javadocSymbol = getElement(path);
if (javadocSymbol == null)
return null;
ElementKind kind = javadocSymbol.getKind();
List params = List.nil();
if (kind == ElementKind.METHOD || kind == ElementKind.CONSTRUCTOR) {
MethodSymbol ee = (MethodSymbol) javadocSymbol;
params = paramTag.isTypeParameter()
? ee.getTypeParameters()
: ee.getParameters();
} else if (kind.isClass() || kind.isInterface()) {
ClassSymbol te = (ClassSymbol) javadocSymbol;
params = paramTag.isTypeParameter()
? te.getTypeParameters()
: te.getRecordComponents();
}
for (Symbol param : params) {
if (param.getSimpleName() == paramTag.getName().getName()) {
return param;
}
}
return null;
}
private VarSymbol findField(ClassSymbol tsym, Name fieldName) {
return searchField(tsym, fieldName, new HashSet<>());
}
private VarSymbol searchField(ClassSymbol tsym, Name fieldName, Set searched) {
if (searched.contains(tsym)) {
return null;
}
searched.add(tsym);
for (Symbol sym : tsym.members().getSymbolsByName(fieldName)) {
if (sym.kind == VAR) {
return (VarSymbol)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 intfs = tsym.getInterfaces();
for (List 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;
}
MethodSymbol findConstructor(ClassSymbol tsym, List paramTypes) {
for (Symbol sym : tsym.members().getSymbolsByName(names.init)) {
if (sym.kind == MTH) {
if (hasParameterTypes((MethodSymbol) sym, paramTypes)) {
return (MethodSymbol) sym;
}
}
}
return null;
}
private MethodSymbol findMethod(ClassSymbol tsym, Name methodName, List paramTypes) {
return searchMethod(tsym, methodName, paramTypes, new HashSet<>());
}
private MethodSymbol searchMethod(ClassSymbol tsym, Name methodName,
List paramTypes, Set 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
//### 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 (Symbol sym : tsym.members().getSymbolsByName(methodName)) {
if (sym.kind == MTH) {
if (sym.name == methodName) {
lastFound = (MethodSymbol)sym;
}
}
}
if (lastFound != null) {
return lastFound;
}
} else {
for (Symbol sym : tsym.members().getSymbolsByName(methodName)) {
if (sym != null &&
sym.kind == MTH) {
if (hasParameterTypes((MethodSymbol) sym, paramTypes)) {
return (MethodSymbol) 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 intfs = tsym.getInterfaces();
for (List 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;
}
private boolean hasParameterTypes(MethodSymbol method, List paramTypes) {
if (paramTypes == null)
return true;
if (method.params().size() != paramTypes.size())
return false;
List methodParamTypes = method.asType().getParameterTypes();
if (!Type.isErroneous(paramTypes) && types.isSubtypes(paramTypes, methodParamTypes)) {
return true;
}
methodParamTypes = types.erasureRecursive(methodParamTypes);
return types.isSameTypes(paramTypes, methodParamTypes);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public TypeMirror getTypeMirror(TreePath path) {
Tree t = path.getLeaf();
Type ty = ((JCTree)t).type;
return ty == null ? null : ty.stripMetadataIfNeeded();
}
@Override @DefinedBy(Api.COMPILER_TREE)
public JavacScope getScope(TreePath path) {
return JavacScope.create(getAttrContext(path));
}
@Override @DefinedBy(Api.COMPILER_TREE)
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;
}
@Override @DefinedBy(Api.COMPILER_TREE)
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;
}
@Override @DefinedBy(Api.COMPILER_TREE)
public DocCommentTree getDocCommentTree(Element e) {
TreePath path = getPath(e);
if (path == null) {
return null;
}
return getDocCommentTree(path);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public DocCommentTree getDocCommentTree(Element e, String relativeFileName) throws IOException {
PackageElement pkg = elements.getPackageOf(e);
FileObject fileForInput = fileManager.getFileForInput(StandardLocation.SOURCE_PATH,
pkg.getQualifiedName().toString(), relativeFileName);
if (fileForInput == null) {
throw new FileNotFoundException(relativeFileName);
}
return getDocCommentTree(fileForInput);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public boolean isAccessible(Scope scope, TypeElement type) {
if (scope instanceof JavacScope && type instanceof ClassSymbol) {
Env env = ((JavacScope) scope).env;
return resolve.isAccessible(env, (ClassSymbol)type, true);
} else
return false;
}
@Override @DefinedBy(Api.COMPILER_TREE)
public boolean isAccessible(Scope scope, Element member, DeclaredType type) {
if (scope instanceof JavacScope
&& member instanceof Symbol
&& type instanceof com.sun.tools.javac.code.Type) {
if ((((com.sun.tools.javac.code.Type)type).tsym.flags_field & Flags.NOT_IN_PROFILE) != 0) {
return false;
}
Env env = ((JavacScope) scope).env;
return resolve.isAccessible(env, (com.sun.tools.javac.code.Type)type, (Symbol)member, true);
} else
return false;
}
private Env 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) {
javacTaskImpl.enter(null);
}
JCCompilationUnit unit = (JCCompilationUnit) path.getCompilationUnit();
Copier copier = createCopier(treeMaker.forToplevel(unit));
Env env = null;
JCClassDecl clazz = null;
JCMethodDecl method = null;
JCVariableDecl field = null;
List 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:
case RECORD:
// System.err.println("CLASS: " + ((JCClassDecl)tree).sym.getSimpleName());
clazz = (JCClassDecl)tree;
Env e = enter.getClassEnv(clazz.sym);
if (e == null)
return env;
env = e;
break;
case METHOD:
// System.err.println("METHOD: " + ((JCMethodDecl)tree).sym.getSimpleName());
method = (JCMethodDecl)tree;
e = memberEnter.getMethodEnv(method, env);
if (e == null)
return env;
env = e;
clazz = null;
break;
case VARIABLE:
// System.err.println("FIELD: " + ((JCVariableDecl)tree).sym.getSimpleName());
field = (JCVariableDecl)tree;
clazz = null;
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 = attribStatToTree(method.body, env, copier.leafCopy, copier.copiedClasses);
} finally {
method.body = (JCBlock) tree;
}
} else {
JCBlock body = copier.copy((JCBlock)tree, (JCTree) path.getLeaf());
env = attribStatToTree(body, env, copier.leafCopy, copier.copiedClasses);
}
return env;
}
default:
// System.err.println("DEFAULT: " + tree.getKind());
if (clazz != null) {
e = typeEnter.getBaseEnv(clazz, env);
if (e == null)
return env;
env = e;
clazz = null;
}
if (field != null && field.getInitializer() == tree) {
e = memberEnter.getInitEnv(field, env);
if (e == null)
return env;
env = e;
JCExpression expr = copier.copy((JCExpression)tree, (JCTree) path.getLeaf());
env = attribExprToTree(expr, env, copier.leafCopy, copier.copiedClasses);
}
return env;
}
}
return env;
}
private Env attribStatToTree(JCTree stat, Env env, JCTree tree, Map copiedClasses) {
//JavaFileObject prev = log.useSource(null);
Log.DiagnosticHandler discardHandler = new Log.DiscardDiagnosticHandler(log);
Log.DeferredDiagnosticHandler deferredHandler = compiler.deferredDiagnosticHandler;
compiler.deferredDiagnosticHandler = null;
enter.shadowTypeEnvs(true);
ArgumentAttr.LocalCacheContext cacheContext = argumentAttr.withLocalCacheContext();
try {
Env ret = attr.attribStatToTree(stat, env, tree);
if (!compiler.skipAnnotationProcessing && compiler.deferredDiagnosticHandler != null && compiler.toProcessAnnotations.nonEmpty()) {
compiler.skipAnnotationProcessing = true;
try {
compiler.processAnnotations(List.nil());
} finally {
compiler.skipAnnotationProcessing = false;
}
}
fixLocalClassNames(copiedClasses, env);
return ret;
} finally {
cacheContext.leave();
enter.shadowTypeEnvs(false);
compiler.deferredDiagnosticHandler = deferredHandler;
log.popDiagnosticHandler(discardHandler);
// log.useSource(prev);
}
}
private Env attribExprToTree(JCExpression expr, Env env, JCTree tree, Map copiedClasses) {
JavaFileObject prev = log.useSource(null);
Log.DiagnosticHandler discardHandler = new Log.DiscardDiagnosticHandler(log);
Log.DeferredDiagnosticHandler deferredHandler = compiler.deferredDiagnosticHandler;
compiler.deferredDiagnosticHandler = null;
enter.shadowTypeEnvs(true);
ArgumentAttr.LocalCacheContext cacheContext = argumentAttr.withLocalCacheContext();
try {
Env ret = attr.attribExprToTree(expr, env, tree);
if (!compiler.skipAnnotationProcessing && compiler.deferredDiagnosticHandler != null && compiler.toProcessAnnotations.nonEmpty()) {
compiler.skipAnnotationProcessing = true;
try {
compiler.processAnnotations(List.nil());
} finally {
compiler.skipAnnotationProcessing = false;
}
}
fixLocalClassNames(copiedClasses, env);
return ret;
} finally {
cacheContext.leave();
enter.shadowTypeEnvs(false);
compiler.deferredDiagnosticHandler = deferredHandler;
log.popDiagnosticHandler(discardHandler);
log.useSource(prev);
}
}
/* Change the flatnames of the local and anonymous classes in the Scope to
* the names they would have if the whole file was attributed normally.
*/
private void fixLocalClassNames(Map copiedClasses,
Env lastEnv) {
Map flatnameForClass = null;
for (Entry e : copiedClasses.entrySet()) {
if (e.getKey().sym != null) {
Name origName;
if (e.getValue().sym != null) {
//if the source tree was already attributed, use the flatname
//from the source tree's Symbol:
origName = e.getValue().sym.flatname;
} else {
//otherwise, compute the flatnames (for source trees) as
//if the full source code would be attributed:
if (flatnameForClass == null) {
flatnameForClass = prepareFlatnameForClass(lastEnv);
}
origName = flatnameForClass.get(e.getValue());
}
if (origName != null) {
e.getKey().sym.flatname = origName;
}
}
}
}
/* This method computes and assigns flatnames to trees, as if they would be
* normally assigned during attribution of the full source code.
*/
private Map prepareFlatnameForClass(Env env) {
Map flatNameForClass = new HashMap<>();
Symbol enclClass = env.enclClass.sym;
if (enclClass != null && (enclClass.flags_field & Flags.UNATTRIBUTED) != 0) {
ListBuffer toClear = new ListBuffer<>();
new TreeScanner() {
Symbol owner;
boolean localContext;
@Override
public void visitClassDef(JCClassDecl tree) {
//compute the name (and ClassSymbol) which would be used
//for this class for full attribution
Symbol prevOwner = owner;
try {
ClassSymbol c;
if (tree.sym != null) {
//already entered:
c = tree.sym;
} else {
c = syms.defineClass(tree.name, owner);
if (owner.kind != TYP) {
//for local classes, assign the flatname
c.flatname = chk.localClassName(c);
chk.putCompiled(c);
toClear.add(c);
}
flatNameForClass.put(tree, c.flatname);
}
owner = c;
super.visitClassDef(tree);
} finally {
owner = prevOwner;
}
}
@Override
public void visitBlock(JCBlock tree) {
Symbol prevOwner = owner;
try {
owner = new MethodSymbol(0, names.empty, Type.noType, owner);
super.visitBlock(tree);
} finally {
owner = prevOwner;
}
}
@Override
public void visitVarDef(JCVariableDecl tree) {
Symbol prevOwner = owner;
try {
owner = new MethodSymbol(0, names.empty, Type.noType, owner);
super.visitVarDef(tree);
} finally {
owner = prevOwner;
}
}
}.scan(env.enclClass);
//revert changes done by the visitor:
toClear.stream().forEach(c -> {
chk.clearLocalClassNameIndexes(c);
chk.removeCompiled(c);
});
}
return flatNameForClass;
}
static JavaFileObject asJavaFileObject(FileObject fileObject) {
JavaFileObject jfo = null;
if (fileObject instanceof JavaFileObject) {
jfo = (JavaFileObject) fileObject;
checkHtmlKind(fileObject, Kind.HTML);
return jfo;
}
checkHtmlKind(fileObject);
jfo = new HtmlFileObject(fileObject);
return jfo;
}
private static void checkHtmlKind(FileObject fileObject) {
checkHtmlKind(fileObject, BaseFileManager.getKind(fileObject.getName()));
}
private static void checkHtmlKind(FileObject fileObject, JavaFileObject.Kind kind) {
if (kind != JavaFileObject.Kind.HTML) {
throw new IllegalArgumentException("HTML file expected:" + fileObject.getName());
}
}
private static class HtmlFileObject extends ForwardingFileObject
implements JavaFileObject {
public HtmlFileObject(FileObject fileObject) {
super(fileObject);
}
@Override @DefinedBy(Api.COMPILER)
public Kind getKind() {
return BaseFileManager.getKind(fileObject.getName());
}
@Override @DefinedBy(Api.COMPILER)
public boolean isNameCompatible(String simpleName, Kind kind) {
return false;
}
@Override @DefinedBy(Api.COMPILER)
public NestingKind getNestingKind() {
return null;
}
@Override @DefinedBy(Api.COMPILER)
public Modifier getAccessLevel() {
return null;
}
}
@Override @DefinedBy(Api.COMPILER_TREE)
public DocCommentTree getDocCommentTree(FileObject fileObject) {
JavaFileObject jfo = asJavaFileObject(fileObject);
DiagnosticSource diagSource = new DiagnosticSource(jfo, log);
final Comment comment = new Comment() {
int offset = 0;
@Override
public String getText() {
try {
CharSequence rawDoc = fileObject.getCharContent(true);
return rawDoc.toString();
} catch (IOException ignore) {
// do nothing
}
return "";
}
@Override
public int getSourcePos(int index) {
return offset + index;
}
@Override
public CommentStyle getStyle() {
throw new UnsupportedOperationException();
}
@Override
public boolean isDeprecated() {
throw new UnsupportedOperationException();
}
};
return new DocCommentParser(parser, diagSource, comment, true).parse();
}
@Override @DefinedBy(Api.COMPILER_TREE)
public DocTreePath getDocTreePath(FileObject fileObject, PackageElement packageElement) {
JavaFileObject jfo = asJavaFileObject(fileObject);
DocCommentTree docCommentTree = getDocCommentTree(jfo);
if (docCommentTree == null)
return null;
TreePath treePath = makeTreePath((PackageSymbol)packageElement, jfo, docCommentTree);
return new DocTreePath(treePath, docCommentTree);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public void setBreakIterator(BreakIterator breakiterator) {
this.breakIterator = breakiterator;
}
@Override @DefinedBy(Api.COMPILER_TREE)
public String getCharacters(EntityTree tree) {
return Entity.getCharacters(tree);
}
/**
* Makes a copy of a tree, noting the value resulting from copying a particular leaf.
**/
protected static class Copier extends TreeCopier {
JCTree leafCopy = null;
private Map copiedClasses = new HashMap<>();
protected Copier(TreeMaker M) {
super(M);
}
@Override
public T copy(T t, JCTree leaf) {
T t2 = super.copy(t, leaf);
if (t == leaf)
leafCopy = t2;
return t2;
}
@Override
public JCTree visitClass(ClassTree node, JCTree p) {
JCTree nue = super.visitClass(node, p);
copiedClasses.put((JCClassDecl) nue, (JCClassDecl) node);
return nue;
}
}
protected Copier createCopier(TreeMaker maker) {
return new Copier(maker);
}
/**
* Returns the original type from the ErrorType object.
* @param errorType The errorType for which we want to get the original type.
* @return TypeMirror corresponding to the original type, replaced by the ErrorType.
* noType (type.tag == NONE) is returned if there is no original type.
*/
@Override @DefinedBy(Api.COMPILER_TREE)
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();
}
if (errorType instanceof com.sun.tools.javac.code.Type.ClassType &&
errorType.getKind() == TypeKind.ERROR) {
ClassType ct = (ClassType) errorType;
return extraType2OriginalMap.computeIfAbsent(ct, tt ->
new ClassType(ct.getEnclosingType(), ct.typarams_field,
ct.tsym, ct.getMetadata()) {
@Override
public Type baseType() { return ct; }
@Override
public TypeKind getKind() {
return TypeKind.DECLARED;
}
});
}
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
*/
@Override @DefinedBy(Api.COMPILER_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);
}
@Override @DefinedBy(Api.COMPILER_TREE)
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:
log.error(DiagnosticFlag.API, pos, Errors.ProcMessager(msg.toString()));
break;
case WARNING:
log.warning(pos, Warnings.ProcMessager(msg.toString()));
break;
case MANDATORY_WARNING:
log.mandatoryWarning(pos, Warnings.ProcMessager(msg.toString()));
break;
default:
log.note(pos, Notes.ProcMessager(msg.toString()));
}
} finally {
if (oldSource != null)
log.useSource(oldSource);
}
}
@Override @DefinedBy(Api.COMPILER_TREE)
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;
}
}
private TreePath makeTreePath(final PackageSymbol psym, final JavaFileObject jfo,
DocCommentTree dcTree) {
JCCompilationUnit jcCompilationUnit = new JCCompilationUnit(List.nil()) {
public int getPos() {
return Position.FIRSTPOS;
}
public JavaFileObject getSourcefile() {
return jfo;
}
@Override @DefinedBy(Api.COMPILER_TREE)
public Position.LineMap getLineMap() {
try {
CharSequence content = jfo.getCharContent(true);
String s = content.toString();
return Position.makeLineMap(s.toCharArray(), s.length(), true);
} catch (IOException ignore) {}
return null;
}
};
jcCompilationUnit.docComments = new DocCommentTable() {
@Override
public boolean hasComment(JCTree tree) {
return false;
}
@Override
public Comment getComment(JCTree tree) {
throw new UnsupportedOperationException();
}
@Override
public String getCommentText(JCTree tree) {
throw new UnsupportedOperationException();
}
@Override
public DCDocComment getCommentTree(JCTree tree) {
return (DCDocComment)dcTree;
}
@Override
public void putComment(JCTree tree, Comment c) {
throw new UnsupportedOperationException();
}
};
jcCompilationUnit.lineMap = jcCompilationUnit.getLineMap();
jcCompilationUnit.modle = psym.modle;
jcCompilationUnit.sourcefile = jfo;
jcCompilationUnit.namedImportScope = new NamedImportScope(psym);
jcCompilationUnit.packge = psym;
jcCompilationUnit.starImportScope = new StarImportScope(psym);
jcCompilationUnit.toplevelScope = WriteableScope.create(psym);
return new TreePath(jcCompilationUnit);
}
}