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The Source.java Java example source code
/*
* Copyright (c) 2012, 2013, 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.util.Set;
import java.util.Collections;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
/** 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.
*
* <p>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.</b>
*/
public class Source implements Comparable<Source> {
// 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;
// The source root under which file resides.
private File root;
// 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, File r) {
name = n;
int dp = n.lastIndexOf(".");
if (dp != -1) {
suffix = n.substring(dp);
} else {
suffix = "";
}
file = f;
root = r;
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;
root = 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 File root() { return root; }
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<String,Source> sources, StringBuilder b) {
List<String> 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 matchine 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<String> suffixes,
List<String> excludes, List includes,
List<String> excludeFiles, List includeFiles,
Map<String,Source> foundFiles,
Map<String,Module> foundModules,
Module currentModule,
boolean permitSourcesWithoutPackage,
boolean inGensrc,
boolean inLinksrc)
throws ProblemException {
if (root == null) return;
int root_prefix = root.getPath().length()+1;
// This is the root source directory, it must not contain any Java sources files
// because we do not allow Java source files without a package.
// (Unless of course --permit-sources-without-package has been specified.)
// It might contain other source files however, (for -tr and -copy) these will
// always be included, since no package pattern can match the root directory.
currentModule = addFilesInDir(root, root_prefix, root, suffixes, permitSourcesWithoutPackage,
excludeFiles, includeFiles, false,
foundFiles, foundModules, currentModule,
inGensrc, inLinksrc);
File[] dirfiles = root.listFiles();
for (File d : dirfiles) {
if (d.isDirectory()) {
// Descend into the directory structure.
scanDirectory(d, root_prefix, root, suffixes,
excludes, includes, excludeFiles, includeFiles,
false, foundFiles, foundModules, currentModule, inGensrc, inLinksrc);
}
}
}
/**
* Test if a path matches any of the patterns given.
* The pattern foo.bar matches only foo.bar
* The pattern foo.* matches foo.bar and foo.bar.zoo etc
*/
static private boolean hasMatch(String path, List<String> patterns) {
for (String p : patterns) {
// Exact match
if (p.equals(path)) {
return true;
}
// Single dot the end matches this package and all its subpackages.
if (p.endsWith(".*")) {
// Remove the wildcard
String patprefix = p.substring(0,p.length()-2);
// Does the path start with the pattern prefix?
if (path.startsWith(patprefix)) {
// If the path has the same length as the pattern prefix, then it is a match.
// If the path is longer, then make sure that
// the next part of the path starts with a dot (.) to prevent
// wildcard matching in the middle of a package name.
if (path.length()==patprefix.length() || path.charAt(patprefix.length())=='.') {
return true;
}
}
}
}
return false;
}
/**
* Matches patterns with the asterisk first. */
// The pattern foo/bar.java only matches foo/bar.java
// The pattern */bar.java matches foo/bar.java and zoo/bar.java etc
static private boolean hasFileMatch(String path, List<String> patterns) {
path = Util.normalizeDriveLetter(path);
for (String p : patterns) {
// Exact match
if (p.equals(path)) {
return true;
}
// Single dot the end matches this package and all its subpackages.
if (p.startsWith("*")) {
// Remove the wildcard
String patsuffix = p.substring(1);
// Does the path start with the pattern prefix?
if (path.endsWith(patsuffix)) {
return true;
}
}
}
return false;
}
/**
* Add the files in the directory, assuming that the file has not been excluded.
* Returns a fresh Module object, if this was a dir with a module-info.java file.
*/
static private Module addFilesInDir(File dir, int rootPrefix, File root,
Set<String> suffixes, boolean allow_javas,
List<String> excludeFiles, List includeFiles, boolean all,
Map<String,Source> foundFiles,
Map<String,Module> foundModules,
Module currentModule,
boolean inGensrc,
boolean inLinksrc)
throws ProblemException
{
for (File f : dir.listFiles()) {
if (f.isFile()) {
boolean should_add =
(excludeFiles == null || excludeFiles.isEmpty() || !hasFileMatch(f.getPath(), excludeFiles))
&& (includeFiles == null || includeFiles.isEmpty() || hasFileMatch(f.getPath(), includeFiles));
if (should_add) {
if (!allow_javas && f.getName().endsWith(".java")) {
throw new ProblemException("No .java files are allowed in the source root "+dir.getPath()+
", please remove "+f.getName());
}
// Extract the file name relative the root.
String fn = f.getPath().substring(rootPrefix);
// Extract the package name.
int sp = fn.lastIndexOf(File.separatorChar);
String pkg = "";
if (sp != -1) {
pkg = fn.substring(0,sp).replace(File.separatorChar,'.');
}
// Is this a module-info.java file?
if (fn.endsWith("module-info.java")) {
// Aha! We have recursed into a module!
if (!currentModule.name().equals("")) {
throw new ProblemException("You have an extra module-info.java inside a module! Please remove "+fn);
}
String module_name = fn.substring(0,fn.length()-16);
currentModule = new Module(module_name, f.getPath());
foundModules.put(module_name, currentModule);
}
// Extract the suffix.
int dp = fn.lastIndexOf(".");
String suffix = "";
if (dp > 0) {
suffix = fn.substring(dp);
}
// Should the file be added?
if (all || suffixes.contains(suffix)) {
Source of = foundFiles.get(f.getPath());
if (of != null) {
throw new ProblemException("You have already added the file "+fn+" from "+of.file().getPath());
}
of = currentModule.lookupSource(f.getPath());
if (of != null) {
// Oups, the source is already added, could be ok, could be not, lets check.
if (inLinksrc) {
// So we are collecting sources for linking only.
if (of.isLinkedOnly()) {
// Ouch, this one is also for linking only. Bad.
throw new ProblemException("You have already added the link only file "+fn+" from "+of.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(f.getPath(), of);
continue;
} 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 ProblemException("Internal error: Double add of file "+fn+" from "+of.file().getPath());
}
}
Source s = new Source(currentModule, f.getPath(), f, root);
if (inGensrc) s.markAsGenerated();
if (inLinksrc) {
s.markAsLinkedOnly();
}
pkg = currentModule.name()+":"+pkg;
foundFiles.put(f.getPath(), s);
currentModule.addSource(pkg, s);
}
}
}
}
return currentModule;
}
private static boolean gurka = false;
static private void scanDirectory(File dir, int rootPrefix, File root,
Set<String> suffixes,
List<String> excludes, List includes,
List<String> excludeFiles, List includeFiles, boolean all,
Map<String,Source> foundFiles,
Map<String,Module> foundModules,
Module currentModule, boolean inGensrc, boolean inLinksrc)
throws ProblemException {
String pkg_name = "";
// Remove the root prefix from the dir path, and replace file separator with dots
// to get the package name.
if (dir.getPath().length() > rootPrefix) {
pkg_name = dir.getPath().substring(rootPrefix).replace(File.separatorChar,'.');
}
// Should this package directory be included and not excluded?
if (all || ((includes==null || includes.isEmpty() || hasMatch(pkg_name, includes)) &&
(excludes==null || excludes.isEmpty() || !hasMatch(pkg_name, excludes)))) {
// Add the source files.
currentModule = addFilesInDir(dir, rootPrefix, root, suffixes, true, excludeFiles, includeFiles, all,
foundFiles, foundModules, currentModule, inGensrc, inLinksrc);
}
for (File d : dir.listFiles()) {
if (d.isDirectory()) {
// Descend into the directory structure.
scanDirectory(d, rootPrefix, root, suffixes,
excludes, includes, excludeFiles, includeFiles, all,
foundFiles, foundModules, currentModule, inGensrc, inLinksrc);
}
}
}
}
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