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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.
/*
* Copyright (c) 2005, 2019, 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
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*/
package com.sun.tools.javac.api;
import java.util.Collection;
import java.util.LinkedHashSet;
import java.util.Locale;
import java.util.Objects;
import java.util.ServiceLoader;
import java.util.Set;
import java.util.stream.Collectors;
import javax.annotation.processing.Processor;
import javax.lang.model.element.Element;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.Elements;
import javax.lang.model.util.Types;
import javax.tools.JavaFileObject;
import com.sun.source.tree.CompilationUnitTree;
import com.sun.source.tree.Tree;
import com.sun.source.util.JavacTask;
import com.sun.source.util.ParameterNameProvider;
import com.sun.source.util.Plugin;
import com.sun.source.util.TaskListener;
import com.sun.tools.doclint.DocLint;
import com.sun.tools.javac.code.MissingInfoHandler;
import com.sun.tools.javac.main.JavaCompiler;
import com.sun.tools.javac.model.JavacElements;
import com.sun.tools.javac.model.JavacTypes;
import com.sun.tools.javac.platform.PlatformDescription;
import com.sun.tools.javac.platform.PlatformDescription.PluginInfo;
import com.sun.tools.javac.processing.JavacProcessingEnvironment;
import com.sun.tools.javac.resources.CompilerProperties.Errors;
import com.sun.tools.javac.resources.CompilerProperties.Warnings;
import com.sun.tools.javac.tree.JCTree;
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.List;
import com.sun.tools.javac.util.Log;
import com.sun.tools.javac.util.ModuleHelper;
import com.sun.tools.javac.util.Options;
import com.sun.tools.javac.util.PropagatedException;
import nbjavac.ModuleWrapper;
/**
* Provides basic functionality for implementations of JavacTask.
*
* 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.
*/
public class BasicJavacTask extends JavacTask {
protected Context context;
protected Options options;
private TaskListener taskListener;
public static JavacTask instance(Context context) {
JavacTask instance = context.get(JavacTask.class);
if (instance == null)
instance = new BasicJavacTask(context, true);
return instance;
}
public BasicJavacTask(Context c, boolean register) {
context = c;
options = Options.instance(c);
if (register)
context.put(JavacTask.class, this);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public Iterable parse() {
throw new IllegalStateException();
}
@Override @DefinedBy(Api.COMPILER_TREE)
public Iterable analyze() {
throw new IllegalStateException();
}
@Override @DefinedBy(Api.COMPILER_TREE)
public Iterable generate() {
throw new IllegalStateException();
}
@Override @DefinedBy(Api.COMPILER_TREE)
public void setTaskListener(TaskListener tl) {
MultiTaskListener mtl = MultiTaskListener.instance(context);
if (taskListener != null)
mtl.remove(taskListener);
if (tl != null)
mtl.add(tl);
taskListener = tl;
}
@Override @DefinedBy(Api.COMPILER_TREE)
public void addTaskListener(TaskListener taskListener) {
MultiTaskListener mtl = MultiTaskListener.instance(context);
mtl.add(taskListener);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public void removeTaskListener(TaskListener taskListener) {
MultiTaskListener mtl = MultiTaskListener.instance(context);
mtl.remove(taskListener);
}
@Override
public void setParameterNameProvider(ParameterNameProvider handler) {
MissingInfoHandler.instance(context).setDelegate(handler);
}
public Collection getTaskListeners() {
MultiTaskListener mtl = MultiTaskListener.instance(context);
return mtl.getTaskListeners();
}
@Override @DefinedBy(Api.COMPILER_TREE)
public TypeMirror getTypeMirror(Iterable path) {
// TODO: Should complete attribution if necessary
Tree last = null;
for (Tree node : path) {
last = Objects.requireNonNull(node);
}
if (last == null) {
throw new IllegalArgumentException("empty path");
}
return ((JCTree) last).type;
}
@Override @DefinedBy(Api.COMPILER_TREE)
public Elements getElements() {
if (context == null)
throw new IllegalStateException();
return JavacElements.instance(context);
}
@Override @DefinedBy(Api.COMPILER_TREE)
public Types getTypes() {
if (context == null)
throw new IllegalStateException();
return JavacTypes.instance(context);
}
@Override @DefinedBy(Api.COMPILER)
public void addModules(Iterable moduleNames) {
throw new IllegalStateException();
}
@Override @DefinedBy(Api.COMPILER)
public void setProcessors(Iterable processors) {
throw new IllegalStateException();
}
@Override @DefinedBy(Api.COMPILER)
public void setLocale(Locale locale) {
throw new IllegalStateException();
}
@Override @DefinedBy(Api.COMPILER)
public Boolean call() {
throw new IllegalStateException();
}
/**
* For internal use only.
* This method will be removed without warning.
* @return the context
*/
public Context getContext() {
return context;
}
public void initPlugins(Set> pluginOpts) {
PlatformDescription platformProvider = context.get(PlatformDescription.class);
if (platformProvider != null) {
for (PluginInfo pluginDesc : platformProvider.getPlugins()) {
java.util.List options =
pluginDesc.getOptions().entrySet().stream()
.map(e -> e.getKey() + "=" + e.getValue())
.collect(Collectors.toList());
try {
initPlugin(pluginDesc.getPlugin(), options.toArray(new String[options.size()]));
} catch (RuntimeException ex) {
throw new PropagatedException(ex);
}
}
}
Set> pluginsToCall = new LinkedHashSet<>(pluginOpts);
JavacProcessingEnvironment pEnv = JavacProcessingEnvironment.instance(context);
ServiceLoader sl = pEnv.getServiceLoader(Plugin.class);
Set autoStart = new LinkedHashSet<>();
for (Plugin plugin : sl) {
if (plugin.autoStart()) {
autoStart.add(plugin);
}
for (List p : pluginsToCall) {
if (plugin.getName().equals(p.head)) {
pluginsToCall.remove(p);
autoStart.remove(plugin);
try {
initPlugin(plugin, p.tail.toArray(new String[p.tail.size()]));
} catch (RuntimeException ex) {
throw new PropagatedException(ex);
}
break;
}
}
}
for (List p : pluginsToCall) {
Log.instance(context).error(Errors.PluginNotFound(p.head));
}
for (Plugin plugin : autoStart) {
try {
initPlugin(plugin, new String[0]);
} catch (RuntimeException ex) {
throw new PropagatedException(ex);
}
}
}
private void initPlugin(Plugin p, String... args) {
ModuleWrapper m = ModuleWrapper.getModule(p.getClass());
if (m.isNamed() && options.isSet("accessInternalAPI")) {
ModuleHelper.addExports(ModuleWrapper.getModule(getClass()), m);
}
p.init(this, args);
}
public void initDocLint(List docLintOpts) {
if (docLintOpts.isEmpty())
return;
try {
DocLint.newDocLint().init(this, docLintOpts.toArray(new String[docLintOpts.size()]));
JavaCompiler.instance(context).keepComments = true;
} catch (IllegalStateException e) {
Log.instance(context).warning(Warnings.DoclintNotAvailable);
}
}
}