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

 /*

  * Copyright (c) 2006, 2012, 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.javac.api;

 import java.io.IOException;

 import java.net.URI;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.List;

 import java.util.Set;

 import javax.tools.*;

 import javax.tools.JavaFileObject.Kind;

 /**

  * Wraps all calls to a given file manager.  Subclasses of this class

  * might override some of these methods and might also provide

  * additional fields and methods.

  *

  * <p>This class might be moved to {@link javax.tools} in a future

  * release.

  *

  * <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>

  *

  * @param <M> the type of file manager wrapped to by this object

  *

  * @author Peter von der Ahé

  * @since 1.6

  */

 public class WrappingJavaFileManager<M extends JavaFileManager> extends ForwardingJavaFileManager<M> {

     /**

      * Creates a new instance of WrappingJavaFileManager.

      * @param fileManager file manager to be wrapped

      */

     protected WrappingJavaFileManager(M fileManager) {

         super(fileManager);

     }

     /**

      * This implementation returns the given file object.  Subclasses

      * may override this behavior.

      *

      * @param fileObject a file object

      */

     protected FileObject wrap(FileObject fileObject) {

         return fileObject;

     }

     /**

      * This implementation forwards to {@link #wrap(FileObject)}.

      * Subclasses may override this behavior.

      *

      * @param fileObject a file object

      * @throws ClassCastException if the file object returned from the

      * forwarded call is not a subtype of {@linkplain JavaFileObject}

      */

     protected JavaFileObject wrap(JavaFileObject fileObject) {

         return (JavaFileObject)wrap((FileObject)fileObject);

     }

     /**

      * This implementation returns the given file object.  Subclasses

      * may override this behavior.

      *

      * @param fileObject a file object

      */

     protected FileObject unwrap(FileObject fileObject) {

         return fileObject;

     }

     /**

      * This implementation forwards to {@link #unwrap(FileObject)}.

      * Subclasses may override this behavior.

      *

      * @param fileObject a file object

      * @throws ClassCastException if the file object returned from the

      * forwarded call is not a subtype of {@linkplain JavaFileObject}

      */

     protected JavaFileObject unwrap(JavaFileObject fileObject) {

         return (JavaFileObject)unwrap((FileObject)fileObject);

     }

     /**

      * This implementation maps the given list of file objects by

      * calling wrap on each.  Subclasses may override this behavior.

      *

      * @param fileObjects a list of file objects

      * @return the mapping

      */

     protected Iterable<JavaFileObject> wrap(Iterable<JavaFileObject> fileObjects) {

         List<JavaFileObject> mapped = new ArrayList<JavaFileObject>();

         for (JavaFileObject fileObject : fileObjects)

             mapped.add(wrap(fileObject));

         return Collections.unmodifiableList(mapped);

     }

     /**

      * This implementation returns the given URI.  Subclasses may

      * override this behavior.

      *

      * @param uri a URI

      */

     protected URI unwrap(URI uri) {

         return uri;

     }

     /**

      * @throws IllegalStateException {@inheritDoc}

      */

     public Iterable<JavaFileObject> list(Location location,

                                          String packageName,

                                          Set<Kind> kinds,

                                          boolean recurse)

         throws IOException

     {

         return wrap(super.list(location, packageName, kinds, recurse));

     }

     /**

      * @throws IllegalStateException {@inheritDoc}

      */

     public String inferBinaryName(Location location, JavaFileObject file) {

         return super.inferBinaryName(location, unwrap(file));

     }

     /**

      * @throws IllegalArgumentException {@inheritDoc}

      * @throws UnsupportedOperationException {@inheritDoc}

      * @throws IllegalStateException {@inheritDoc}

      */

     public JavaFileObject getJavaFileForInput(Location location,

                                               String className,

                                               Kind kind)

         throws IOException

     {

         return wrap(super.getJavaFileForInput(location, className, kind));

     }

     /**

      * @throws IllegalArgumentException {@inheritDoc}

      * @throws UnsupportedOperationException {@inheritDoc}

      * @throws IllegalStateException {@inheritDoc}

      */

     public JavaFileObject getJavaFileForOutput(Location location,

                                                String className,

                                                Kind kind,

                                                FileObject sibling)

         throws IOException

     {

         return wrap(super.getJavaFileForOutput(location, className, kind, unwrap(sibling)));

     }

     /**

      * @throws IllegalArgumentException {@inheritDoc}

      * @throws IllegalStateException {@inheritDoc}

      */

     public FileObject getFileForInput(Location location,

                                       String packageName,

                                       String relativeName)

         throws IOException

     {

         return wrap(super.getFileForInput(location, packageName, relativeName));

     }

     /**

      * @throws IllegalArgumentException {@inheritDoc}

      * @throws IllegalStateException {@inheritDoc}

      */

     public FileObject getFileForOutput(Location location,

                                        String packageName,

                                        String relativeName,

                                        FileObject sibling)

         throws IOException

     {

         return wrap(super.getFileForOutput(location,

                                            packageName,

                                            relativeName,

                                            unwrap(sibling)));

     }

 }