/*
* Copyright (c) 2010, 2015, 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.
*
* 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.
*/
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.regex.Pattern;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.NestingKind;
import javax.tools.JavaFileManager.Location;
import javax.tools.JavaFileObject;
import javax.tools.StandardJavaFileManager;
import com.sun.tools.javac.api.WrappingJavaFileManager;
/**
* A JavaFileManager that can throw IOException on attempting to read or write
* selected files that match a regular expression.
*/
public class FileManager
extends WrappingJavaFileManager<StandardJavaFileManager>
implements StandardJavaFileManager {
private static final String CANT_READ = "cantRead:";
private static final String CANT_WRITE = "cantWrite:";
private Pattern cantRead;
private Pattern cantWrite;
public FileManager(StandardJavaFileManager fm, List<String> opts) {
super(fm);
for (String opt: opts) {
if (opt.startsWith(CANT_READ))
cantRead = Pattern.compile(opt.substring(CANT_READ.length()));
else if (opt.startsWith(CANT_WRITE))
cantWrite = Pattern.compile(opt.substring(CANT_WRITE.length()));
else
throw new IllegalArgumentException(opt);
}
}
@Override
protected JavaFileObject wrap(JavaFileObject fo) {
return (fo == null) ? null : new WrappedFileObject(fo);
}
@Override
protected JavaFileObject unwrap(JavaFileObject fo) {
if (fo instanceof WrappedFileObject)
return ((WrappedFileObject) fo).delegate;
else
return fo;
}
public Iterable<? extends JavaFileObject> getJavaFileObjectsFromFiles(Iterable<? extends File> files) {
return wrap2(fileManager.getJavaFileObjectsFromFiles(files));
}
public Iterable<? extends JavaFileObject> getJavaFileObjects(File... files) {
return wrap2(fileManager.getJavaFileObjects(files));
}
public Iterable<? extends JavaFileObject> getJavaFileObjectsFromStrings(Iterable<String> names) {
return wrap2(fileManager.getJavaFileObjectsFromStrings(names));
}
public Iterable<? extends JavaFileObject> getJavaFileObjects(String... names) {
return wrap2(fileManager.getJavaFileObjects(names));
}
/* This method is regrettably necessary because WrappingJavaFileManager.wrap takes
* Iterable<JavaFileObject> fileObjects
* instead of
* Iterable<? extends JavaFileObject> fileObjects
*/
protected Iterable<JavaFileObject> wrap2(Iterable<? extends JavaFileObject> fileObjects) {
List<JavaFileObject> mapped = new ArrayList<JavaFileObject>();
for (JavaFileObject fileObject : fileObjects)
mapped.add(wrap(fileObject));
return Collections.unmodifiableList(mapped);
}
public void setLocation(Location location, Iterable<? extends File> path) throws IOException {
fileManager.setLocation(location, path);
}
public Iterable<? extends File> getLocation(Location location) {
return fileManager.getLocation(location);
}
class WrappedFileObject implements JavaFileObject {
WrappedFileObject(JavaFileObject fileObject) {
delegate = Objects.requireNonNull(fileObject);
}
public Kind getKind() {
return delegate.getKind();
}
public boolean isNameCompatible(String simpleName, Kind kind) {
return delegate.isNameCompatible(simpleName, kind);
}
public NestingKind getNestingKind() {
return delegate.getNestingKind();
}
public Modifier getAccessLevel() {
return delegate.getAccessLevel();
}
public URI toUri() {
return delegate.toUri();
}
public String getName() {
return delegate.getName();
}
public InputStream openInputStream() throws IOException {
checkRead();
return delegate.openInputStream();
}
public OutputStream openOutputStream() throws IOException {
checkWrite();
return delegate.openOutputStream();
}
public Reader openReader(boolean ignoreEncodingErrors) throws IOException {
checkRead();
return delegate.openReader(ignoreEncodingErrors);
}
public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
checkRead();
return delegate.getCharContent(ignoreEncodingErrors);
}
public Writer openWriter() throws IOException {
checkWrite();
return delegate.openWriter();
}
public long getLastModified() {
return delegate.getLastModified();
}
public boolean delete() {
return delegate.delete();
}
void checkRead() throws IOException {
String canonName = getName().replace(File.separatorChar, '/');
if (cantRead != null && cantRead.matcher(canonName).matches())
throw new IOException("FileManager: Can't read");
}
void checkWrite() throws IOException {
String canonName = getName().replace(File.separatorChar, '/');
if (cantWrite != null && cantWrite.matcher(canonName).matches())
throw new IOException("FileManager: Can't write");
}
JavaFileObject delegate;
}
}