/*
* 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.comp;
import com.sun.tools.javac.util.ListBuffer;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URI;
import java.util.Set;
import java.util.HashSet;
import java.util.Map;
import java.util.HashMap;
import javax.tools.*;
import javax.tools.JavaFileObject.Kind;
/**
* Intercepts reads and writes to the file system to gather
* information about what artifacts are generated.
*
* Traps writes to certain files, if the content written is identical
* to the existing file.
*
* Can also blind out the filemanager from seeing certain files in the file system.
* Necessary to prevent javac from seeing some sources where the source path points.
*
* <p><b>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></p>
*/
public class SmartFileManager extends ForwardingJavaFileManager<JavaFileManager> {
// Set of sources that can be seen by javac.
Set<URI> visibleSources = new HashSet<URI>();
// Map from modulename:packagename to artifacts.
Map<String,Set<URI>> packageArtifacts = new HashMap<String,Set<URI>>();
// Where to print informational messages.
PrintWriter stdout;
public SmartFileManager(JavaFileManager fileManager) {
super(fileManager);
}
public void setVisibleSources(Set<URI> s) {
visibleSources = s;
}
public void cleanArtifacts() {
packageArtifacts = new HashMap<String,Set<URI>>();
}
public void setLog(PrintWriter pw) {
stdout = pw;
}
public Map<String,Set<URI>> getPackageArtifacts() {
return packageArtifacts;
}
@Override
public Iterable<JavaFileObject> list(Location location,
String packageName,
Set<Kind> kinds,
boolean recurse)
throws IOException
{
// Acquire the list of files.
Iterable<JavaFileObject> files = super.list(location, packageName, kinds, recurse);
if (visibleSources.isEmpty()) {
return files;
}
// Now filter!
ListBuffer<JavaFileObject> filteredFiles = new ListBuffer<JavaFileObject>();
for (JavaFileObject f : files) {
URI uri = f.toUri();
String t = uri.toString();
if (t.startsWith("jar:")
|| t.endsWith(".class")
|| visibleSources.contains(uri))
{
filteredFiles.add(f);
}
}
return filteredFiles;
}
@Override
public boolean hasLocation(Location location) {
return super.hasLocation(location);
}
@Override
public JavaFileObject getJavaFileForInput(Location location,
String className,
Kind kind)
throws IOException
{
JavaFileObject file = super.getJavaFileForInput(location, className, kind);
if (file == null || visibleSources.isEmpty()) {
return file;
}
if (visibleSources.contains(file.toUri())) {
return file;
}
return null;
}
@Override
public JavaFileObject getJavaFileForOutput(Location location,
String className,
Kind kind,
FileObject sibling)
throws IOException
{
JavaFileObject file = super.getJavaFileForOutput(location, className, kind, sibling);
if (file == null) return file;
int dp = className.lastIndexOf('.');
String pkg_name = "";
if (dp != -1) {
pkg_name = className.substring(0, dp);
}
// When modules are in use, then the mod_name might be something like "jdk_base"
String mod_name = "";
addArtifact(mod_name+":"+pkg_name, file.toUri());
return file;
}
@Override
public FileObject getFileForInput(Location location,
String packageName,
String relativeName)
throws IOException
{
FileObject file = super.getFileForInput(location, packageName, relativeName);
if (file == null || visibleSources.isEmpty()) {
return file;
}
if (visibleSources.contains(file.toUri())) {
return file;
}
return null;
}
@Override
public FileObject getFileForOutput(Location location,
String packageName,
String relativeName,
FileObject sibling)
throws IOException
{
FileObject file = super.getFileForOutput(location, packageName, relativeName, sibling);
if (file == null) return file;
if (location.equals(StandardLocation.NATIVE_HEADER_OUTPUT) &&
file instanceof JavaFileObject) {
file = new SmartFileObject((JavaFileObject)file, stdout);
packageName = ":" + packageNameFromFileName(relativeName);
}
if (packageName.equals("")) {
packageName = ":";
}
addArtifact(packageName, file.toUri());
return file;
}
private String packageNameFromFileName(String fn) {
StringBuilder sb = new StringBuilder();
int p = fn.indexOf('_'), pp = 0;
while (p != -1) {
if (sb.length() > 0) sb.append('.');
sb.append(fn.substring(pp,p));
if (p == fn.length()-1) break;
pp = p+1;
p = fn.indexOf('_',pp);
}
return sb.toString();
}
@Override
public void flush() throws IOException {
super.flush();
}
@Override
public void close() throws IOException {
super.close();
}
void addArtifact(String pkgName, URI art) {
Set<URI> s = packageArtifacts.get(pkgName);
if (s == null) {
s = new HashSet<URI>();
packageArtifacts.put(pkgName, s);
}
s.add(art);
}
}