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/*
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* Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.jshell;
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import com.sun.source.tree.CompilationUnitTree;
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import com.sun.source.tree.Tree;
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import com.sun.source.util.Trees;
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import com.sun.tools.javac.api.JavacTaskImpl;
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import com.sun.tools.javac.api.JavacTool;
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import com.sun.tools.javac.util.Context;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Iterator;
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import java.util.List;
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import javax.tools.Diagnostic;
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import javax.tools.DiagnosticCollector;
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import javax.tools.JavaCompiler;
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import javax.tools.JavaFileManager;
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import javax.tools.JavaFileObject;
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import javax.tools.ToolProvider;
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import static jdk.jshell.Util.*;
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import com.sun.source.tree.ImportTree;
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import com.sun.tools.javac.code.Types;
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import com.sun.tools.javac.util.JavacMessages;
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import jdk.jshell.MemoryFileManager.OutputMemoryJavaFileObject;
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import java.util.Collections;
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import java.util.Locale;
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import static javax.tools.StandardLocation.CLASS_OUTPUT;
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import static jdk.internal.jshell.debug.InternalDebugControl.DBG_GEN;
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import java.io.File;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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import javax.lang.model.util.Elements;
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import javax.tools.FileObject;
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import jdk.jshell.MemoryFileManager.SourceMemoryJavaFileObject;
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import jdk.jshell.ClassTracker.ClassInfo;
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/**
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* The primary interface to the compiler API. Parsing, analysis, and
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* compilation to class files (in memory).
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* @author Robert Field
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*/
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class TaskFactory {
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private final JavaCompiler compiler;
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private final MemoryFileManager fileManager;
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private final JShell state;
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private String classpath = System.getProperty("java.class.path");
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TaskFactory(JShell state) {
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this.state = state;
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this.compiler = ToolProvider.getSystemJavaCompiler();
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if (compiler == null) {
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throw new UnsupportedOperationException("Compiler not available, must be run with full JDK 9.");
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}
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if (!System.getProperty("java.specification.version").equals("1.9")) {
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throw new UnsupportedOperationException("Wrong compiler, must be run with full JDK 9.");
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}
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this.fileManager = new MemoryFileManager(
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compiler.getStandardFileManager(null, null, null), state);
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}
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void addToClasspath(String path) {
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classpath = classpath + File.pathSeparator + path;
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List<String> args = new ArrayList<>();
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args.add(classpath);
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fileManager().handleOption("-classpath", args.iterator());
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}
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MemoryFileManager fileManager() {
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return fileManager;
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}
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private interface SourceHandler<T> {
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JavaFileObject sourceToFileObject(MemoryFileManager fm, T t);
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Diag diag(Diagnostic<? extends JavaFileObject> d);
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}
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private class StringSourceHandler implements SourceHandler<String> {
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@Override
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public JavaFileObject sourceToFileObject(MemoryFileManager fm, String src) {
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return fm.createSourceFileObject(src, "$NeverUsedName$", src);
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}
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@Override
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public Diag diag(final Diagnostic<? extends JavaFileObject> d) {
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return new Diag() {
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@Override
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public boolean isError() {
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return d.getKind() == Diagnostic.Kind.ERROR;
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}
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@Override
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public long getPosition() {
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return d.getPosition();
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}
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@Override
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public long getStartPosition() {
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return d.getStartPosition();
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}
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@Override
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public long getEndPosition() {
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return d.getEndPosition();
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}
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@Override
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public String getCode() {
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return d.getCode();
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}
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@Override
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public String getMessage(Locale locale) {
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return expunge(d.getMessage(locale));
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}
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@Override
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Unit unitOrNull() {
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return null;
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}
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};
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}
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}
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private class WrapSourceHandler implements SourceHandler<OuterWrap> {
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final OuterWrap wrap;
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WrapSourceHandler(OuterWrap wrap) {
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this.wrap = wrap;
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}
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@Override
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public JavaFileObject sourceToFileObject(MemoryFileManager fm, OuterWrap w) {
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return fm.createSourceFileObject(w, w.classFullName(), w.wrapped());
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}
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@Override
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public Diag diag(Diagnostic<? extends JavaFileObject> d) {
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return wrap.wrapDiag(d);
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}
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}
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private class UnitSourceHandler implements SourceHandler<Unit> {
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@Override
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public JavaFileObject sourceToFileObject(MemoryFileManager fm, Unit u) {
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return fm.createSourceFileObject(u,
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state.maps.classFullName(u.snippet()),
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u.snippet().outerWrap().wrapped());
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}
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@Override
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public Diag diag(Diagnostic<? extends JavaFileObject> d) {
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SourceMemoryJavaFileObject smjfo = (SourceMemoryJavaFileObject) d.getSource();
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Unit u = (Unit) smjfo.getOrigin();
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return u.snippet().outerWrap().wrapDiag(d);
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}
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}
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/**
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* Parse a snippet of code (as a String) using the parser subclass. Return
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* the parse tree (and errors).
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*/
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class ParseTask extends BaseTask {
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private final CompilationUnitTree cut;
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private final List<? extends Tree> units;
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ParseTask(final String source) {
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super(Stream.of(source),
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new StringSourceHandler(),
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"-XDallowStringFolding=false", "-proc:none");
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ReplParserFactory.instance(getContext());
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Iterable<? extends CompilationUnitTree> asts = parse();
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Iterator<? extends CompilationUnitTree> it = asts.iterator();
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if (it.hasNext()) {
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this.cut = it.next();
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List<? extends ImportTree> imps = cut.getImports();
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this.units = !imps.isEmpty() ? imps : cut.getTypeDecls();
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} else {
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this.cut = null;
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this.units = Collections.emptyList();
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}
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}
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private Iterable<? extends CompilationUnitTree> parse() {
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try {
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return task.parse();
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} catch (Exception ex) {
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throw new InternalError("Exception during parse - " + ex.getMessage(), ex);
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}
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}
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List<? extends Tree> units() {
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return units;
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}
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@Override
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CompilationUnitTree cuTree() {
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return cut;
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}
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}
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/**
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* Run the normal "analyze()" pass of the compiler over the wrapped snippet.
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*/
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class AnalyzeTask extends BaseTask {
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private final CompilationUnitTree cut;
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AnalyzeTask(final OuterWrap wrap) {
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this(Stream.of(wrap),
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new WrapSourceHandler(wrap),
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"-XDshouldStopPolicy=FLOW", "-proc:none");
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}
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AnalyzeTask(final Collection<Unit> units) {
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this(units.stream(), new UnitSourceHandler(),
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"-XDshouldStopPolicy=FLOW", "-Xlint:unchecked", "-proc:none");
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}
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<T>AnalyzeTask(final Stream<T> stream, SourceHandler<T> sourceHandler,
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String... extraOptions) {
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super(stream, sourceHandler, extraOptions);
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Iterator<? extends CompilationUnitTree> cuts = analyze().iterator();
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if (cuts.hasNext()) {
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this.cut = cuts.next();
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//proc.debug("AnalyzeTask element=%s cutp=%s cut=%s\n", e, cutp, cut);
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} else {
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this.cut = null;
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//proc.debug("AnalyzeTask -- no elements -- %s\n", getDiagnostics());
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}
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}
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private Iterable<? extends CompilationUnitTree> analyze() {
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try {
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Iterable<? extends CompilationUnitTree> cuts = task.parse();
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task.analyze();
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return cuts;
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} catch (Exception ex) {
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throw new InternalError("Exception during analyze - " + ex.getMessage(), ex);
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}
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}
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@Override
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CompilationUnitTree cuTree() {
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return cut;
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}
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Elements getElements() {
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return task.getElements();
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}
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javax.lang.model.util.Types getTypes() {
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return task.getTypes();
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}
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}
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/**
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* Unit the wrapped snippet to class files.
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*/
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class CompileTask extends BaseTask {
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private final Map<Unit, List<OutputMemoryJavaFileObject>> classObjs = new HashMap<>();
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CompileTask(Collection<Unit> units) {
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super(units.stream(), new UnitSourceHandler(),
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"-Xlint:unchecked", "-proc:none");
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}
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boolean compile() {
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fileManager.registerClassFileCreationListener(this::listenForNewClassFile);
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boolean result = task.call();
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fileManager.registerClassFileCreationListener(null);
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return result;
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}
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List<ClassInfo> classInfoList(Unit u) {
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List<OutputMemoryJavaFileObject> l = classObjs.get(u);
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if (l == null) return Collections.emptyList();
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return l.stream()
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.map(fo -> state.classTracker.classInfo(fo.getName(), fo.getBytes()))
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.collect(Collectors.toList());
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}
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private void listenForNewClassFile(OutputMemoryJavaFileObject jfo, JavaFileManager.Location location,
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String className, JavaFileObject.Kind kind, FileObject sibling) {
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//debug("listenForNewClassFile %s loc=%s kind=%s\n", className, location, kind);
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if (location == CLASS_OUTPUT) {
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state.debug(DBG_GEN, "Compiler generating class %s\n", className);
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Unit u = ((sibling instanceof SourceMemoryJavaFileObject)
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&& (((SourceMemoryJavaFileObject) sibling).getOrigin() instanceof Unit))
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? (Unit) ((SourceMemoryJavaFileObject) sibling).getOrigin()
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: null;
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classObjs.compute(u, (k, v) -> (v == null)? new ArrayList<>() : v)
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.add(jfo);
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}
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}
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@Override
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CompilationUnitTree cuTree() {
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throw new UnsupportedOperationException("Not supported.");
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}
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}
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abstract class BaseTask {
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final DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<>();
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final JavacTaskImpl task;
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private DiagList diags = null;
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private final SourceHandler<?> sourceHandler;
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private final Context context = new Context();
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private Types types;
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private JavacMessages messages;
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private Trees trees;
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private <T>BaseTask(Stream<T> inputs,
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//BiFunction<MemoryFileManager, T, JavaFileObject> sfoCreator,
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SourceHandler<T> sh,
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String... extraOptions) {
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this.sourceHandler = sh;
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List<String> options = Arrays.asList(extraOptions);
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Iterable<? extends JavaFileObject> compilationUnits = inputs
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.map(in -> sh.sourceToFileObject(fileManager, in))
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.collect(Collectors.toList());
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this.task = (JavacTaskImpl) ((JavacTool) compiler).getTask(null,
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fileManager, diagnostics, options, null,
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compilationUnits, context);
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}
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abstract CompilationUnitTree cuTree();
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Diag diag(Diagnostic<? extends JavaFileObject> diag) {
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return sourceHandler.diag(diag);
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}
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Context getContext() {
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return context;
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}
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Types types() {
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if (types == null) {
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types = Types.instance(context);
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}
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return types;
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}
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JavacMessages messages() {
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if (messages == null) {
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messages = JavacMessages.instance(context);
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}
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return messages;
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}
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Trees trees() {
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if (trees == null) {
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trees = Trees.instance(task);
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}
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return trees;
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}
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// ------------------ diags functionality
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DiagList getDiagnostics() {
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if (diags == null) {
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LinkedHashMap<String, Diag> diagMap = new LinkedHashMap<>();
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for (Diagnostic<? extends JavaFileObject> in : diagnostics.getDiagnostics()) {
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Diag d = diag(in);
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String uniqueKey = d.getCode() + ":" + d.getPosition() + ":" + d.getMessage(null);
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diagMap.put(uniqueKey, d);
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}
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diags = new DiagList(diagMap.values());
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}
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return diags;
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}
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boolean hasErrors() {
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return getDiagnostics().hasErrors();
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}
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String shortErrorMessage() {
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StringBuilder sb = new StringBuilder();
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for (Diag diag : getDiagnostics()) {
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for (String line : diag.getMessage(null).split("\\r?\\n")) {
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if (!line.trim().startsWith("location:")) {
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sb.append(line);
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}
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}
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}
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return sb.toString();
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}
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void debugPrintDiagnostics(String src) {
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for (Diag diag : getDiagnostics()) {
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state.debug(DBG_GEN, "ERROR --\n");
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for (String line : diag.getMessage(null).split("\\r?\\n")) {
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if (!line.trim().startsWith("location:")) {
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state.debug(DBG_GEN, "%s\n", line);
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}
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}
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int start = (int) diag.getStartPosition();
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|
436 |
int end = (int) diag.getEndPosition();
|
|
437 |
if (src != null) {
|
|
438 |
String[] srcLines = src.split("\\r?\\n");
|
|
439 |
for (String line : srcLines) {
|
|
440 |
state.debug(DBG_GEN, "%s\n", line);
|
|
441 |
}
|
|
442 |
|
|
443 |
StringBuilder sb = new StringBuilder();
|
|
444 |
for (int i = 0; i < start; ++i) {
|
|
445 |
sb.append(' ');
|
|
446 |
}
|
|
447 |
sb.append('^');
|
|
448 |
if (end > start) {
|
|
449 |
for (int i = start + 1; i < end; ++i) {
|
|
450 |
sb.append('-');
|
|
451 |
}
|
|
452 |
sb.append('^');
|
|
453 |
}
|
|
454 |
state.debug(DBG_GEN, "%s\n", sb.toString());
|
|
455 |
}
|
|
456 |
state.debug(DBG_GEN, "printDiagnostics start-pos = %d ==> %d -- wrap = %s\n",
|
|
457 |
diag.getStartPosition(), start, this);
|
|
458 |
state.debug(DBG_GEN, "Code: %s\n", diag.getCode());
|
|
459 |
state.debug(DBG_GEN, "Pos: %d (%d - %d) -- %s\n", diag.getPosition(),
|
|
460 |
diag.getStartPosition(), diag.getEndPosition(), diag.getMessage(null));
|
|
461 |
}
|
|
462 |
}
|
|
463 |
}
|
|
464 |
|
|
465 |
}
|