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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) 2012, 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
* questions.
*/
package com.sun.tools.sjavac;
import java.io.File;
import java.io.IOException;
import java.nio.file.FileSystem;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.PathMatcher;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Set;
import java.util.Collections;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.util.regex.PatternSyntaxException;
/** A Source object maintains information about a source file.
* For example which package it belongs to and kind of source it is.
* The class also knows how to find source files (scanRoot) given include/exclude
* patterns and a root.
*
*
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 Source implements Comparable {
// The package the source belongs to.
private Package pkg;
// Name of this source file, relative its source root.
// For example: java/lang/Object.java
// Or if the source file is inside a module:
// jdk.base/java/lang/Object.java
private String name;
// What kind of file is this.
private String suffix;
// When this source file was last_modified
private long lastModified;
// The source File.
private File file;
// If the source is generated.
private boolean isGenerated;
// If the source is only linked to, not compiled.
private boolean linkedOnly;
@Override
public boolean equals(Object o) {
return (o instanceof Source) && name.equals(((Source)o).name);
}
@Override
public int compareTo(Source o) {
return name.compareTo(o.name);
}
@Override
public int hashCode() {
return name.hashCode();
}
public Source(Module m, String n, File f) {
name = n;
int dp = n.lastIndexOf(".");
if (dp != -1) {
suffix = n.substring(dp);
} else {
suffix = "";
}
file = f;
lastModified = f.lastModified();
linkedOnly = false;
}
public Source(Package p, String n, long lm) {
pkg = p;
name = n;
int dp = n.lastIndexOf(".");
if (dp != -1) {
suffix = n.substring(dp);
} else {
suffix = "";
}
file = null;
lastModified = lm;
linkedOnly = false;
int ls = n.lastIndexOf('/');
}
public String name() { return name; }
public String suffix() { return suffix; }
public Package pkg() { return pkg; }
public File file() { return file; }
public long lastModified() {
return lastModified;
}
public void setPackage(Package p) {
pkg = p;
}
public void markAsGenerated() {
isGenerated = true;
}
public boolean isGenerated() {
return isGenerated;
}
public void markAsLinkedOnly() {
linkedOnly = true;
}
public boolean isLinkedOnly() {
return linkedOnly;
}
private void save(StringBuilder b) {
String CL = linkedOnly?"L":"C";
String GS = isGenerated?"G":"S";
b.append(GS+" "+CL+" "+name+" "+file.lastModified()+"\n");
}
// Parse a line that looks like this:
// S C /code/alfa/A.java 1357631228000
static public Source load(Package lastPackage, String l, boolean isGenerated) {
int sp = l.indexOf(' ',4);
if (sp == -1) return null;
String name = l.substring(4,sp);
long last_modified = Long.parseLong(l.substring(sp+1));
boolean isLinkedOnly = false;
if (l.charAt(2) == 'L') {
isLinkedOnly = true;
} else if (l.charAt(2) == 'C') {
isLinkedOnly = false;
} else return null;
Source s = new Source(lastPackage, name, last_modified);
s.file = new File(name);
if (isGenerated) s.markAsGenerated();
if (isLinkedOnly) s.markAsLinkedOnly();
return s;
}
public static void saveSources(Map sources, StringBuilder b) {
List sorted_sources = new ArrayList<>();
for (String key : sources.keySet()) {
sorted_sources.add(key);
}
Collections.sort(sorted_sources);
for (String key : sorted_sources) {
Source s = sources.get(key);
s.save(b);
}
}
/**
* Recurse into the directory root and find all files matching the excl/incl/exclfiles/inclfiles rules.
* Detects the existence of module-info.java files and presumes that the directory it resides in
* is the name of the current module.
*/
static public void scanRoot(File root,
Set suffixes,
List excludes,
List includes,
Map foundFiles,
Map foundModules,
final Module currentModule,
boolean permitSourcesWithoutPackage,
boolean inGensrc,
boolean inLinksrc)
throws IOException, ProblemException {
if (root == null)
return;
FileSystem fs = root.toPath().getFileSystem();
if (includes.isEmpty()) {
includes = Collections.singletonList("**");
}
List includeMatchers = createPathMatchers(fs, includes);
List excludeMatchers = createPathMatchers(fs, excludes);
Files.walkFileTree(root.toPath(), new SimpleFileVisitor() {
@Override
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
Path relToRoot = root.toPath().relativize(file);
if (includeMatchers.stream().anyMatch(im -> im.matches(relToRoot))
&& excludeMatchers.stream().noneMatch(em -> em.matches(relToRoot))
&& suffixes.contains(Util.fileSuffix(file))) {
// TODO: Test this.
Source existing = foundFiles.get(file);
if (existing != null) {
throw new IOException("You have already added the file "+file+" from "+existing.file().getPath());
}
existing = currentModule.lookupSource(file.toString());
if (existing != null) {
// Oops, the source is already added, could be ok, could be not, let's check.
if (inLinksrc) {
// So we are collecting sources for linking only.
if (existing.isLinkedOnly()) {
// Ouch, this one is also for linking only. Bad.
throw new IOException("You have already added the link only file " + file + " from " + existing.file().getPath());
}
// Ok, the existing source is to be compiled. Thus this link only is redundant
// since all compiled are also linked to. Continue to the next source.
// But we need to add the source, so that it will be visible to linking,
// if not the multi core compile will fail because a JavaCompiler cannot
// find the necessary dependencies for its part of the source.
foundFiles.put(file.toString(), existing);
} else {
// We are looking for sources to compile, if we find an existing to be compiled
// source with the same name, it is an internal error, since we must
// find the sources to be compiled before we find the sources to be linked to.
throw new IOException("Internal error: Double add of file " + file + " from " + existing.file().getPath());
}
} else {
//////////////////////////////////////////////////////////////
// Add source
Source s = new Source(currentModule, file.toString(), file.toFile());
if (inGensrc) {
s.markAsGenerated();
}
if (inLinksrc) {
s.markAsLinkedOnly();
}
String pkg = packageOfJavaFile(root.toPath(), file);
pkg = currentModule.name() + ":" + pkg;
foundFiles.put(file.toString(), s);
currentModule.addSource(pkg, s);
//////////////////////////////////////////////////////////////
}
}
return FileVisitResult.CONTINUE;
}
});
}
private static List createPathMatchers(FileSystem fs, List patterns) {
List matchers = new ArrayList<>();
for (String pattern : patterns) {
try {
matchers.add(fs.getPathMatcher("glob:" + pattern));
} catch (PatternSyntaxException e) {
Log.error("Invalid pattern: " + pattern);
throw e;
}
}
return matchers;
}
private static String packageOfJavaFile(Path sourceRoot, Path javaFile) {
Path javaFileDir = javaFile.getParent();
Path packageDir = sourceRoot.relativize(javaFileDir);
List separateDirs = new ArrayList<>();
for (Path pathElement : packageDir) {
separateDirs.add(pathElement.getFileName().toString());
}
return String.join(".", separateDirs);
}
@Override
public String toString() {
return String.format("%s[pkg: %s, name: %s, suffix: %s, file: %s, isGenerated: %b, linkedOnly: %b]",
getClass().getSimpleName(),
pkg,
name,
suffix,
file,
isGenerated,
linkedOnly);
}
}
