Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2010, 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.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 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 = 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;

     }

 }