| /* |
| * Copyright (c) 2014, 2018, 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 jdk.jshell; |
| |
| import com.sun.source.tree.CompilationUnitTree; |
| import com.sun.source.tree.Tree; |
| import com.sun.source.util.Trees; |
| import com.sun.tools.javac.api.JavacTaskImpl; |
| import com.sun.tools.javac.util.Context; |
| import java.util.ArrayList; |
| import java.util.List; |
| import javax.tools.Diagnostic; |
| import javax.tools.DiagnosticCollector; |
| import javax.tools.JavaCompiler; |
| import javax.tools.JavaFileManager; |
| import javax.tools.JavaFileObject; |
| import javax.tools.ToolProvider; |
| import static jdk.jshell.Util.*; |
| import com.sun.source.tree.ImportTree; |
| import com.sun.tools.javac.code.Types; |
| import com.sun.tools.javac.util.JavacMessages; |
| import jdk.jshell.MemoryFileManager.OutputMemoryJavaFileObject; |
| import java.util.Collections; |
| import java.util.Locale; |
| import static javax.tools.StandardLocation.CLASS_OUTPUT; |
| import static jdk.internal.jshell.debug.InternalDebugControl.DBG_GEN; |
| import java.io.File; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import java.util.stream.Collectors; |
| import static java.util.stream.Collectors.toList; |
| import java.util.stream.Stream; |
| import javax.lang.model.util.Elements; |
| import javax.tools.FileObject; |
| import jdk.jshell.MemoryFileManager.SourceMemoryJavaFileObject; |
| import java.lang.Runtime.Version; |
| import java.nio.CharBuffer; |
| import java.util.function.BiFunction; |
| import com.sun.source.tree.ClassTree; |
| import com.sun.source.tree.Tree.Kind; |
| import com.sun.source.util.TaskEvent; |
| import com.sun.source.util.TaskListener; |
| import com.sun.tools.javac.api.JavacTaskPool; |
| import com.sun.tools.javac.code.ClassFinder; |
| 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.PackageSymbol; |
| import com.sun.tools.javac.code.Symbol.TypeSymbol; |
| import com.sun.tools.javac.code.Symbol.VarSymbol; |
| import com.sun.tools.javac.code.Symtab; |
| import com.sun.tools.javac.code.Type; |
| 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.Resolve; |
| import com.sun.tools.javac.parser.Parser; |
| import com.sun.tools.javac.parser.ParserFactory; |
| import com.sun.tools.javac.tree.JCTree.JCExpression; |
| import com.sun.tools.javac.tree.JCTree.JCTypeCast; |
| import com.sun.tools.javac.tree.JCTree.JCVariableDecl; |
| import com.sun.tools.javac.tree.JCTree.Tag; |
| import com.sun.tools.javac.util.Context.Factory; |
| import com.sun.tools.javac.util.Log; |
| import com.sun.tools.javac.util.Log.DiscardDiagnosticHandler; |
| import com.sun.tools.javac.util.Names; |
| import static jdk.internal.jshell.debug.InternalDebugControl.DBG_FMGR; |
| import jdk.jshell.Snippet.Status; |
| |
| /** |
| * The primary interface to the compiler API. Parsing, analysis, and |
| * compilation to class files (in memory). |
| * @author Robert Field |
| */ |
| class TaskFactory { |
| |
| private final JavaCompiler compiler; |
| private final MemoryFileManager fileManager; |
| private final JShell state; |
| private String classpath = System.getProperty("java.class.path"); |
| private final static Version INITIAL_SUPPORTED_VER = Version.parse("9"); |
| |
| TaskFactory(JShell state) { |
| this.state = state; |
| this.compiler = ToolProvider.getSystemJavaCompiler(); |
| if (compiler == null) { |
| throw new UnsupportedOperationException("Compiler not available, must be run with full JDK 9."); |
| } |
| Version current = Version.parse(System.getProperty("java.specification.version")); |
| if (INITIAL_SUPPORTED_VER.compareToIgnoreOptional(current) > 0) { |
| throw new UnsupportedOperationException("Wrong compiler, must be run with full JDK 9."); |
| } |
| this.fileManager = new MemoryFileManager( |
| compiler.getStandardFileManager(null, null, null), state); |
| initTaskPool(); |
| } |
| |
| void addToClasspath(String path) { |
| classpath = classpath + File.pathSeparator + path; |
| List<String> args = new ArrayList<>(); |
| args.add(classpath); |
| fileManager().handleOption("-classpath", args.iterator()); |
| initTaskPool(); |
| } |
| |
| MemoryFileManager fileManager() { |
| return fileManager; |
| } |
| |
| public <Z> Z parse(String source, |
| boolean forceExpression, |
| Worker<ParseTask, Z> worker) { |
| StringSourceHandler sh = new StringSourceHandler(); |
| return runTask(Stream.of(source), |
| sh, |
| List.of("-XDallowStringFolding=false", "-proc:none", |
| "-XDneedsReplParserFactory=" + forceExpression), |
| (jti, diagnostics) -> new ParseTask(sh, jti, diagnostics, forceExpression), |
| worker); |
| } |
| |
| public <Z> Z analyze(OuterWrap wrap, |
| Worker<AnalyzeTask, Z> worker) { |
| return analyze(Collections.singletonList(wrap), worker); |
| } |
| |
| public <Z> Z analyze(OuterWrap wrap, |
| List<String> extraArgs, |
| Worker<AnalyzeTask, Z> worker) { |
| return analyze(Collections.singletonList(wrap), extraArgs, worker); |
| } |
| |
| public <Z> Z analyze(Collection<OuterWrap> wraps, |
| Worker<AnalyzeTask, Z> worker) { |
| return analyze(wraps, Collections.emptyList(), worker); |
| } |
| |
| public <Z> Z analyze(Collection<OuterWrap> wraps, |
| List<String> extraArgs, |
| Worker<AnalyzeTask, Z> worker) { |
| WrapSourceHandler sh = new WrapSourceHandler(); |
| List<String> allOptions = new ArrayList<>(); |
| |
| allOptions.add("--should-stop=at=FLOW"); |
| allOptions.add("-Xlint:unchecked"); |
| allOptions.add("-proc:none"); |
| allOptions.addAll(extraArgs); |
| |
| return runTask(wraps.stream(), |
| sh, |
| allOptions, |
| (jti, diagnostics) -> new AnalyzeTask(sh, jti, diagnostics), |
| worker); |
| } |
| |
| public <Z> Z compile(Collection<OuterWrap> wraps, |
| Worker<CompileTask, Z> worker) { |
| WrapSourceHandler sh = new WrapSourceHandler(); |
| |
| return runTask(wraps.stream(), |
| sh, |
| List.of("-Xlint:unchecked", "-proc:none", "-parameters"), |
| (jti, diagnostics) -> new CompileTask(sh, jti, diagnostics), |
| worker); |
| } |
| |
| private <S, T extends BaseTask, Z> Z runTask(Stream<S> inputs, |
| SourceHandler<S> sh, |
| List<String> options, |
| BiFunction<JavacTaskImpl, DiagnosticCollector<JavaFileObject>, T> creator, |
| Worker<T, Z> worker) { |
| List<String> allOptions = new ArrayList<>(options.size() + state.extraCompilerOptions.size()); |
| allOptions.addAll(options); |
| allOptions.addAll(state.extraCompilerOptions); |
| Iterable<? extends JavaFileObject> compilationUnits = inputs |
| .map(in -> sh.sourceToFileObject(fileManager, in)) |
| .collect(Collectors.toList()); |
| DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<>(); |
| state.debug(DBG_FMGR, "Task (%s %s) Options: %s\n", this, compilationUnits, allOptions); |
| return javacTaskPool.getTask(null, fileManager, diagnostics, allOptions, null, |
| compilationUnits, task -> { |
| JavacTaskImpl jti = (JavacTaskImpl) task; |
| Context context = jti.getContext(); |
| DisableAccessibilityResolve.preRegister(context); |
| jti.addTaskListener(new TaskListenerImpl(context, state)); |
| try { |
| return worker.withTask(creator.apply(jti, diagnostics)); |
| } finally { |
| //additional cleanup: purge the REPL package: |
| Symtab syms = Symtab.instance(context); |
| Names names = Names.instance(context); |
| PackageSymbol repl = syms.getPackage(syms.unnamedModule, names.fromString(Util.REPL_PACKAGE)); |
| if (repl != null) { |
| for (ClassSymbol clazz : syms.getAllClasses()) { |
| if (clazz.packge() == repl) { |
| syms.removeClass(syms.unnamedModule, clazz.flatName()); |
| } |
| } |
| repl.members_field = null; |
| repl.completer = ClassFinder.instance(context).getCompleter(); |
| } |
| } |
| }); |
| } |
| |
| interface Worker<T extends BaseTask, Z> { |
| public Z withTask(T task); |
| } |
| |
| // Parse a snippet and return our parse task handler |
| <Z> Z parse(final String source, Worker<ParseTask, Z> worker) { |
| return parse(source, false, pt -> { |
| if (!pt.units().isEmpty() |
| && pt.units().get(0).getKind() == Kind.EXPRESSION_STATEMENT |
| && pt.getDiagnostics().hasOtherThanNotStatementErrors()) { |
| // It failed, it may be an expression being incorrectly |
| // parsed as having a leading type variable, example: a < b |
| // Try forcing interpretation as an expression |
| return parse(source, true, ept -> { |
| if (!ept.getDiagnostics().hasOtherThanNotStatementErrors()) { |
| return worker.withTask(ept); |
| } else { |
| return worker.withTask(pt); |
| } |
| }); |
| } |
| return worker.withTask(pt); |
| }); |
| } |
| |
| private interface SourceHandler<T> { |
| |
| JavaFileObject sourceToFileObject(MemoryFileManager fm, T t); |
| |
| Diag diag(Diagnostic<? extends JavaFileObject> d); |
| } |
| |
| private class StringSourceHandler implements SourceHandler<String> { |
| |
| @Override |
| public JavaFileObject sourceToFileObject(MemoryFileManager fm, String src) { |
| return fm.createSourceFileObject(src, "$NeverUsedName$", src); |
| } |
| |
| @Override |
| public Diag diag(final Diagnostic<? extends JavaFileObject> d) { |
| return new Diag() { |
| |
| @Override |
| public boolean isError() { |
| return d.getKind() == Diagnostic.Kind.ERROR; |
| } |
| |
| @Override |
| public long getPosition() { |
| return d.getPosition(); |
| } |
| |
| @Override |
| public long getStartPosition() { |
| return d.getStartPosition(); |
| } |
| |
| @Override |
| public long getEndPosition() { |
| return d.getEndPosition(); |
| } |
| |
| @Override |
| public String getCode() { |
| return d.getCode(); |
| } |
| |
| @Override |
| public String getMessage(Locale locale) { |
| return expunge(d.getMessage(locale)); |
| } |
| }; |
| } |
| } |
| |
| private class WrapSourceHandler implements SourceHandler<OuterWrap> { |
| |
| @Override |
| public JavaFileObject sourceToFileObject(MemoryFileManager fm, OuterWrap w) { |
| return fm.createSourceFileObject(w, w.classFullName(), w.wrapped()); |
| } |
| |
| /** |
| * Get the source information from the wrap. If this is external, or |
| * otherwise does not have wrap info, just use source code. |
| * @param d the Diagnostic from the compiler |
| * @return the corresponding Diag |
| */ |
| @Override |
| public Diag diag(Diagnostic<? extends JavaFileObject> d) { |
| JavaFileObject jfo = d.getSource(); |
| return jfo instanceof SourceMemoryJavaFileObject |
| ? ((OuterWrap) ((SourceMemoryJavaFileObject) jfo).getOrigin()).wrapDiag(d) |
| : new StringSourceHandler().diag(d); |
| } |
| } |
| |
| /** |
| * Parse a snippet of code (as a String) using the parser subclass. Return |
| * the parse tree (and errors). |
| */ |
| class ParseTask extends BaseTask { |
| |
| private final Iterable<? extends CompilationUnitTree> cuts; |
| private final List<? extends Tree> units; |
| |
| private ParseTask(SourceHandler<String> sh, |
| JavacTaskImpl task, |
| DiagnosticCollector<JavaFileObject> diagnostics, |
| boolean forceExpression) { |
| super(sh, task, diagnostics); |
| ReplParserFactory.preRegister(context, forceExpression); |
| cuts = parse(); |
| units = Util.stream(cuts) |
| .flatMap(cut -> { |
| List<? extends ImportTree> imps = cut.getImports(); |
| return (!imps.isEmpty() ? imps : cut.getTypeDecls()).stream(); |
| }) |
| .collect(toList()); |
| } |
| |
| private Iterable<? extends CompilationUnitTree> parse() { |
| try { |
| return task.parse(); |
| } catch (Exception ex) { |
| throw new InternalError("Exception during parse - " + ex.getMessage(), ex); |
| } |
| } |
| |
| List<? extends Tree> units() { |
| return units; |
| } |
| |
| @Override |
| Iterable<? extends CompilationUnitTree> cuTrees() { |
| return cuts; |
| } |
| } |
| |
| /** |
| * Run the normal "analyze()" pass of the compiler over the wrapped snippet. |
| */ |
| class AnalyzeTask extends BaseTask { |
| |
| private final Iterable<? extends CompilationUnitTree> cuts; |
| |
| private AnalyzeTask(SourceHandler<OuterWrap> sh, |
| JavacTaskImpl task, |
| DiagnosticCollector<JavaFileObject> diagnostics) { |
| super(sh, task, diagnostics); |
| cuts = analyze(); |
| } |
| |
| private Iterable<? extends CompilationUnitTree> analyze() { |
| try { |
| Iterable<? extends CompilationUnitTree> cuts = task.parse(); |
| task.analyze(); |
| return cuts; |
| } catch (Exception ex) { |
| throw new InternalError("Exception during analyze - " + ex.getMessage(), ex); |
| } |
| } |
| |
| @Override |
| Iterable<? extends CompilationUnitTree> cuTrees() { |
| return cuts; |
| } |
| |
| Elements getElements() { |
| return task.getElements(); |
| } |
| |
| javax.lang.model.util.Types getTypes() { |
| return task.getTypes(); |
| } |
| } |
| |
| /** |
| * Unit the wrapped snippet to class files. |
| */ |
| class CompileTask extends BaseTask { |
| |
| private final Map<OuterWrap, List<OutputMemoryJavaFileObject>> classObjs = new HashMap<>(); |
| |
| CompileTask(SourceHandler<OuterWrap>sh, |
| JavacTaskImpl jti, |
| DiagnosticCollector<JavaFileObject> diagnostics) { |
| super(sh, jti, diagnostics); |
| } |
| |
| boolean compile() { |
| fileManager.registerClassFileCreationListener(this::listenForNewClassFile); |
| boolean result = task.call(); |
| fileManager.registerClassFileCreationListener(null); |
| return result; |
| } |
| |
| // Returns the list of classes generated during this compile. |
| // Stores the mapping between class name and current compiled bytes. |
| List<String> classList(OuterWrap w) { |
| List<OutputMemoryJavaFileObject> l = classObjs.get(w); |
| if (l == null) { |
| return Collections.emptyList(); |
| } |
| List<String> list = new ArrayList<>(); |
| for (OutputMemoryJavaFileObject fo : l) { |
| state.classTracker.setCurrentBytes(fo.getName(), fo.getBytes()); |
| list.add(fo.getName()); |
| } |
| return list; |
| } |
| |
| private void listenForNewClassFile(OutputMemoryJavaFileObject jfo, JavaFileManager.Location location, |
| String className, JavaFileObject.Kind kind, FileObject sibling) { |
| //debug("listenForNewClassFile %s loc=%s kind=%s\n", className, location, kind); |
| if (location == CLASS_OUTPUT) { |
| state.debug(DBG_GEN, "Compiler generating class %s\n", className); |
| OuterWrap w = ((sibling instanceof SourceMemoryJavaFileObject) |
| && (((SourceMemoryJavaFileObject) sibling).getOrigin() instanceof OuterWrap)) |
| ? (OuterWrap) ((SourceMemoryJavaFileObject) sibling).getOrigin() |
| : null; |
| classObjs.compute(w, (k, v) -> (v == null)? new ArrayList<>() : v) |
| .add(jfo); |
| } |
| } |
| |
| @Override |
| Iterable<? extends CompilationUnitTree> cuTrees() { |
| throw new UnsupportedOperationException("Not supported."); |
| } |
| } |
| |
| private JavacTaskPool javacTaskPool; |
| |
| private void initTaskPool() { |
| javacTaskPool = new JavacTaskPool(5); |
| } |
| |
| abstract class BaseTask { |
| |
| final DiagnosticCollector<JavaFileObject> diagnostics; |
| final JavacTaskImpl task; |
| private DiagList diags = null; |
| private final SourceHandler<?> sourceHandler; |
| final Context context; |
| private Types types; |
| private JavacMessages messages; |
| private Trees trees; |
| |
| private <T>BaseTask(SourceHandler<T> sh, |
| JavacTaskImpl task, |
| DiagnosticCollector<JavaFileObject> diagnostics) { |
| this.sourceHandler = sh; |
| this.task = task; |
| context = task.getContext(); |
| this.diagnostics = diagnostics; |
| } |
| |
| abstract Iterable<? extends CompilationUnitTree> cuTrees(); |
| |
| CompilationUnitTree firstCuTree() { |
| return cuTrees().iterator().next(); |
| } |
| |
| Diag diag(Diagnostic<? extends JavaFileObject> diag) { |
| return sourceHandler.diag(diag); |
| } |
| |
| Context getContext() { |
| return context; |
| } |
| |
| Types types() { |
| if (types == null) { |
| types = Types.instance(context); |
| } |
| return types; |
| } |
| |
| JavacMessages messages() { |
| if (messages == null) { |
| messages = JavacMessages.instance(context); |
| } |
| return messages; |
| } |
| |
| Trees trees() { |
| if (trees == null) { |
| trees = Trees.instance(task); |
| } |
| return trees; |
| } |
| |
| // ------------------ diags functionality |
| |
| DiagList getDiagnostics() { |
| if (diags == null) { |
| LinkedHashMap<String, Diag> diagMap = new LinkedHashMap<>(); |
| for (Diagnostic<? extends JavaFileObject> in : diagnostics.getDiagnostics()) { |
| Diag d = diag(in); |
| String uniqueKey = d.getCode() + ":" + d.getPosition() + ":" + d.getMessage(PARSED_LOCALE); |
| diagMap.put(uniqueKey, d); |
| } |
| diags = new DiagList(diagMap.values()); |
| } |
| return diags; |
| } |
| |
| boolean hasErrors() { |
| return getDiagnostics().hasErrors(); |
| } |
| |
| String shortErrorMessage() { |
| StringBuilder sb = new StringBuilder(); |
| for (Diag diag : getDiagnostics()) { |
| for (String line : diag.getMessage(PARSED_LOCALE).split("\\r?\\n")) { |
| if (!line.trim().startsWith("location:")) { |
| sb.append(line); |
| } |
| } |
| } |
| return sb.toString(); |
| } |
| |
| void debugPrintDiagnostics(String src) { |
| for (Diag diag : getDiagnostics()) { |
| state.debug(DBG_GEN, "ERROR --\n"); |
| for (String line : diag.getMessage(PARSED_LOCALE).split("\\r?\\n")) { |
| if (!line.trim().startsWith("location:")) { |
| state.debug(DBG_GEN, "%s\n", line); |
| } |
| } |
| int start = (int) diag.getStartPosition(); |
| int end = (int) diag.getEndPosition(); |
| if (src != null) { |
| String[] srcLines = src.split("\\r?\\n"); |
| for (String line : srcLines) { |
| state.debug(DBG_GEN, "%s\n", line); |
| } |
| |
| StringBuilder sb = new StringBuilder(); |
| for (int i = 0; i < start; ++i) { |
| sb.append(' '); |
| } |
| sb.append('^'); |
| if (end > start) { |
| for (int i = start + 1; i < end; ++i) { |
| sb.append('-'); |
| } |
| sb.append('^'); |
| } |
| state.debug(DBG_GEN, "%s\n", sb.toString()); |
| } |
| state.debug(DBG_GEN, "printDiagnostics start-pos = %d ==> %d -- wrap = %s\n", |
| diag.getStartPosition(), start, this); |
| state.debug(DBG_GEN, "Code: %s\n", diag.getCode()); |
| state.debug(DBG_GEN, "Pos: %d (%d - %d) -- %s\n", diag.getPosition(), |
| diag.getStartPosition(), diag.getEndPosition(), diag.getMessage(null)); |
| } |
| } |
| } |
| |
| /**The variable types inferred for "var"s may be non-denotable. |
| * jshell desugars these variables into fields, and fields must have |
| * a denotable type. So these fields are declared with some simpler denotable |
| * type, and the listener here enhances the types of the fields to be the full |
| * inferred types. This is mainly when the inferred type contains: |
| * -intersection types (e.g. <Z extends Runnable&CharSequence> Z get() {...} var z = get();) |
| * -types that are inaccessible at the given place |
| * |
| * This type enhancement does not need to do anything about anonymous classes, as these |
| * are desugared into member classes. |
| */ |
| private static final class TaskListenerImpl implements TaskListener { |
| |
| private final Context context; |
| private final JShell state; |
| /* Keep the original (declaration) types of the fields that were enhanced. |
| * The declaration types need to be put back before writing the fields |
| * into classfiles.*/ |
| private final Map<VarSymbol, Type> var2OriginalType = new HashMap<>(); |
| |
| public TaskListenerImpl(Context context, JShell state) { |
| this.context = context; |
| this.state = state; |
| } |
| |
| @Override |
| public void started(TaskEvent e) { |
| if (e.getKind() != TaskEvent.Kind.GENERATE) |
| return ; |
| //clear enhanced types in fields we are about to write to the classfiles: |
| for (Tree clazz : e.getCompilationUnit().getTypeDecls()) { |
| ClassTree ct = (ClassTree) clazz; |
| |
| for (Tree member : ct.getMembers()) { |
| if (member.getKind() != Tree.Kind.VARIABLE) |
| continue; |
| VarSymbol vsym = ((JCVariableDecl) member).sym; |
| Type original = var2OriginalType.remove(vsym); |
| if (original != null) { |
| vsym.type = original; |
| } |
| } |
| } |
| } |
| |
| private boolean variablesSet = false; |
| |
| @Override |
| public void finished(TaskEvent e) { |
| if (e.getKind() != TaskEvent.Kind.ENTER || variablesSet) |
| return ; |
| state.maps |
| .snippetList() |
| .stream() |
| .filter(s -> s.status() == Status.VALID) |
| .filter(s -> s.kind() == Snippet.Kind.VAR) |
| .filter(s -> s.subKind() == Snippet.SubKind.VAR_DECLARATION_WITH_INITIALIZER_SUBKIND || |
| s.subKind() == Snippet.SubKind.TEMP_VAR_EXPRESSION_SUBKIND) |
| .forEach(s -> setVariableType((VarSnippet) s)); |
| variablesSet = true; |
| } |
| |
| /* If the snippet contain enhanced types, enhance the type of |
| * the variable from snippet s to be the enhanced type. |
| */ |
| private void setVariableType(VarSnippet s) { |
| String typeName = s.fullTypeName; |
| |
| if (typeName == null) |
| return ; |
| |
| Symtab syms = Symtab.instance(context); |
| Names names = Names.instance(context); |
| Log log = Log.instance(context); |
| ParserFactory parserFactory = ParserFactory.instance(context); |
| Attr attr = Attr.instance(context); |
| Enter enter = Enter.instance(context); |
| DisableAccessibilityResolve rs = (DisableAccessibilityResolve) Resolve.instance(context); |
| |
| //find the variable: |
| ClassSymbol clazz = syms.getClass(syms.unnamedModule, names.fromString(s.classFullName())); |
| if (clazz == null || !clazz.isCompleted()) |
| return; |
| VarSymbol field = (VarSymbol) clazz.members().findFirst(names.fromString(s.name()), sym -> sym.kind == Kinds.Kind.VAR); |
| |
| if (field != null && !var2OriginalType.containsKey(field)) { |
| //if it was not enhanced yet: |
| //ignore any errors: |
| JavaFileObject prev = log.useSource(null); |
| DiscardDiagnosticHandler h = new DiscardDiagnosticHandler(log); |
| try { |
| //parse the type as a cast, i.e. "(<typeName>) x". This is to support |
| //intersection types: |
| CharBuffer buf = CharBuffer.wrap(("(" + typeName +")x\u0000").toCharArray(), 0, typeName.length() + 3); |
| Parser parser = parserFactory.newParser(buf, false, false, false); |
| JCExpression expr = parser.parseExpression(); |
| if (expr.hasTag(Tag.TYPECAST)) { |
| //if parsed OK, attribute and set the type: |
| var2OriginalType.put(field, field.type); |
| |
| JCTypeCast tree = (JCTypeCast) expr; |
| rs.runWithoutAccessChecks(() -> { |
| field.type = attr.attribType(tree.clazz, |
| enter.getEnvs().iterator().next().enclClass.sym); |
| }); |
| } |
| } finally { |
| log.popDiagnosticHandler(h); |
| log.useSource(prev); |
| } |
| } |
| } |
| } |
| |
| private static final class DisableAccessibilityResolve extends Resolve { |
| |
| public static void preRegister(Context context) { |
| if (context.get(Marker.class) == null) { |
| context.put(resolveKey, ((Factory<Resolve>) c -> new DisableAccessibilityResolve(c))); |
| context.put(Marker.class, new Marker()); |
| } |
| } |
| |
| private boolean noAccessChecks; |
| |
| public DisableAccessibilityResolve(Context context) { |
| super(context); |
| } |
| |
| /**Run the given Runnable with all access checks disabled. |
| * |
| * @param r Runnnable to run |
| */ |
| public void runWithoutAccessChecks(Runnable r) { |
| boolean prevNoAccessCheckes = noAccessChecks; |
| try { |
| noAccessChecks = true; |
| r.run(); |
| } finally { |
| noAccessChecks = prevNoAccessCheckes; |
| } |
| } |
| |
| @Override |
| public boolean isAccessible(Env<AttrContext> env, TypeSymbol c, boolean checkInner) { |
| if (noAccessChecks) return true; |
| return super.isAccessible(env, c, checkInner); |
| } |
| |
| @Override |
| public boolean isAccessible(Env<AttrContext> env, Type site, Symbol sym, boolean checkInner) { |
| if (noAccessChecks) return true; |
| return super.isAccessible(env, site, sym, checkInner); |
| } |
| |
| private static final class Marker {} |
| } |
| |
| } |
