<change id="FileObject.getLookup">

            <api name="filesystems"/>

            <summary>FileObject is a lookup provider</summary>

            <version major="7" minor="60"/>

            <date year="2012" month="4" day="24"/>

            <author login="emi"/>

            <compatibility addition="yes" deprecation="no"/>

            <description>

                <p>

                    Added <code>FileObject.getLookup</code>.

                </p>

            </description>

            <class package="org.openide.filesystems" name="FileObject"/>

            <issue number="209231"/>

        </change>

The FileObjectLookupFactory is also looked up in the global Lookup.

    /**

     * A singleton lookup containing this file. This field exists only so we

     * return the exact same instance in getLookup() when no

     * FileObjectLookupFactory is present. There is no actual need to return the

     * exact same instance since SingletonLookup is cheap but it helps with the

     * testing.

     */

    private final Lookup selfLookup = Lookups.singleton(this);

    /**

     * @return lookup representing this file

     */

    @Override

    public Lookup getLookup() {

        FileObjectLookupFactory f = Lookup.getDefault().lookup(FileObjectLookupFactory.class);

        if (f != null) {

            Lookup l = f.getLookup(this);

            if (l != null) {

                assert l.lookup(FileObject.class) != null : "At least a FileObject should be provided in the lookup"; //NOI18N

                return l;

            }

        }

        //fallback

        return selfLookup;

    }

/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 *

 * Copyright 2012 Oracle and/or its affiliates. All rights reserved.

 *

 * Oracle and Java are registered trademarks of Oracle and/or its affiliates.

 * Other names may be trademarks of their respective owners.

 *

 * The contents of this file are subject to the terms of either the GNU

 * General Public License Version 2 only ("GPL") or the Common

 * Development and Distribution License("CDDL") (collectively, the

 * "License"). You may not use this file except in compliance with the

 * License. You can obtain a copy of the License at

 * http://www.netbeans.org/cddl-gplv2.html

 * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

 * specific language governing permissions and limitations under the

 * License.  When distributing the software, include this License Header

 * Notice in each file and include the License file at

 * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the GPL Version 2 section of the License file that

 * accompanied this code. If applicable, add the following below the

 * License Header, with the fields enclosed by brackets [] replaced by

 * your own identifying information:

 * "Portions Copyrighted [year] [name of copyright owner]"

 *

 * If you wish your version of this file to be governed by only the CDDL

 * or only the GPL Version 2, indicate your decision by adding

 * "[Contributor] elects to include this software in this distribution

 * under the [CDDL or GPL Version 2] license." If you do not indicate a

 * single choice of license, a recipient has the option to distribute

 * your version of this file under either the CDDL, the GPL Version 2 or

 * to extend the choice of license to its licensees as provided above.

 * However, if you add GPL Version 2 code and therefore, elected the GPL

 * Version 2 license, then the option applies only if the new code is

 * made subject to such option by the copyright holder.

 *

 * Contributor(s): Emilian Bold <emilian.bold@gmail.com>

 *

 * Portions Copyrighted 2012 Sun Microsystems, Inc.

 */

package org.openide.filesystems;

import org.openide.util.Lookup;

/**

 * A private service representing a factory that produces a FileObject's

 * Lookup.

 */

public abstract class FileObjectLookupFactory {

    protected FileObjectLookupFactory() {

        if (!getClass().getName().startsWith("org.openide")) { // NOI18N

            throw new IllegalStateException();

        }

    }

    /**

     * Produce the lookup for the given file.

     * 

     * @param fo any FileObject

     * @return the FileObject's Lookup or null if unknown.

     */

    public abstract Lookup getLookup(FileObject fo);

}

/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 *

 * Copyright 2012 Oracle and/or its affiliates. All rights reserved.

 *

 * Oracle and Java are registered trademarks of Oracle and/or its affiliates.

 * Other names may be trademarks of their respective owners.

 *

 * The contents of this file are subject to the terms of either the GNU

 * General Public License Version 2 only ("GPL") or the Common

 * Development and Distribution License("CDDL") (collectively, the

 * "License"). You may not use this file except in compliance with the

 * License. You can obtain a copy of the License at

 * http://www.netbeans.org/cddl-gplv2.html

 * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

 * specific language governing permissions and limitations under the

 * License.  When distributing the software, include this License Header

 * Notice in each file and include the License file at

 * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the GPL Version 2 section of the License file that

 * accompanied this code. If applicable, add the following below the

 * License Header, with the fields enclosed by brackets [] replaced by

 * your own identifying information:

 * "Portions Copyrighted [year] [name of copyright owner]"

 *

 * If you wish your version of this file to be governed by only the CDDL

 * or only the GPL Version 2, indicate your decision by adding

 * "[Contributor] elects to include this software in this distribution

 * under the [CDDL or GPL Version 2] license." If you do not indicate a

 * single choice of license, a recipient has the option to distribute

 * your version of this file under either the CDDL, the GPL Version 2 or

 * to extend the choice of license to its licensees as provided above.

 * However, if you add GPL Version 2 code and therefore, elected the GPL

 * Version 2 license, then the option applies only if the new code is

 * made subject to such option by the copyright holder.

 *

 * Contributor(s): Emilian Bold <emilian.bold@gmail.com>

 *

 * Portions Copyrighted 2012 Sun Microsystems, Inc.

 */

package org.openide.filesystems;

import java.io.File;

import java.io.IOException;

import org.netbeans.junit.NbTestCase;

import org.openide.util.Lookup;

public class FileObjectLookupTest extends NbTestCase {

    public FileObjectLookupTest(String testName) {

        super(testName);

    }

    LocalFileSystem lfs;

    @Override

    protected void setUp() throws Exception {

        clearWorkDir();

        File f = new File(getWorkDir(), "folder");

        assertTrue("Folder created", f.mkdir());

        File a = new File(f, "file1.txt");

        assertTrue("File created", a.createNewFile());

        lfs = new LocalFileSystem();

        lfs.setRootDirectory(getWorkDir());

    }

    @Override

    protected void tearDown() throws Exception {

        lfs.setReadOnly(true);

        clearWorkDir();

    }

    public void testHasFileObject() throws IOException {

        FileObject fo = lfs.findResource("folder/file1.txt");

        FileObject primary = fo.getLookup().lookup(FileObject.class);

        assertNotNull("It should have a FileObject in the lookup (but the primary one!)", primary);

        assertEquals("Since we have no DataLoaders, the same file should be in the lookup", fo, primary);

    }

    public void testSameLookupAfterMove() throws IOException {

        FileObject fo = lfs.findResource("folder/file1.txt");

        assertNotNull(fo);

        Lookup orig = fo.getLookup();

        assertNotNull(orig);

        FileLock lock = fo.lock();

        try {

            fo = fo.move(lock, lfs.findResource("folder"), "movedfile", "txt");

        } finally {

            lock.releaseLock();

        }

        Lookup move = fo.getLookup();

        assertTrue("The lookup should remain the same after a move", orig == move);

        lock = fo.lock();

        try {

            fo.rename(lock, "renamedfile", "txt");

        } finally {

            lock.releaseLock();

        }

        Lookup rename = fo.getLookup();

        assertTrue("The lookup should remain the same after a rename", orig == rename);

    }

}

<li>FileObjectLookupFactory.class</li>

/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 *

 * Copyright 2012 Oracle and/or its affiliates. All rights reserved.

 *

 * Oracle and Java are registered trademarks of Oracle and/or its affiliates.

 * Other names may be trademarks of their respective owners.

 *

 * The contents of this file are subject to the terms of either the GNU

 * General Public License Version 2 only ("GPL") or the Common

 * Development and Distribution License("CDDL") (collectively, the

 * "License"). You may not use this file except in compliance with the

 * License. You can obtain a copy of the License at

 * http://www.netbeans.org/cddl-gplv2.html

 * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

 * specific language governing permissions and limitations under the

 * License.  When distributing the software, include this License Header

 * Notice in each file and include the License file at

 * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the GPL Version 2 section of the License file that

 * accompanied this code. If applicable, add the following below the

 * License Header, with the fields enclosed by brackets [] replaced by

 * your own identifying information:

 * "Portions Copyrighted [year] [name of copyright owner]"

 *

 * If you wish your version of this file to be governed by only the CDDL

 * or only the GPL Version 2, indicate your decision by adding

 * "[Contributor] elects to include this software in this distribution

 * under the [CDDL or GPL Version 2] license." If you do not indicate a

 * single choice of license, a recipient has the option to distribute

 * your version of this file under either the CDDL, the GPL Version 2 or

 * to extend the choice of license to its licensees as provided above.

 * However, if you add GPL Version 2 code and therefore, elected the GPL

 * Version 2 license, then the option applies only if the new code is

 * made subject to such option by the copyright holder.

 *

 * Contributor(s): Emilian Bold <emilian.bold@gmail.com>

 *

 * Portions Copyrighted 2012 Sun Microsystems, Inc.

 */

package org.openide.loaders;

import java.util.logging.Level;

import java.util.logging.Logger;

import org.openide.filesystems.FileObject;

import org.openide.filesystems.FileObjectLookupFactory;

import org.openide.util.Lookup;

import org.openide.util.lookup.ServiceProvider;

@ServiceProvider(service = FileObjectLookupFactory.class)

public class FileObjectDataObjectBridge extends FileObjectLookupFactory {

    private static final Logger log = Logger.getLogger(FileObjectDataObjectBridge.class.getName());

    public FileObjectDataObjectBridge(){

        super();

    }

    @Override

    public Lookup getLookup(FileObject fo) {

        try {

            return DataObject.find(fo).getLookup();

        } catch (DataObjectNotFoundException donfe) {

            log.log(Level.WARNING, "Unexpected exception", donfe);

            return null;

        }

    }

}

/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 *

 * Copyright 2012 Oracle and/or its affiliates. All rights reserved.

 *

 * Oracle and Java are registered trademarks of Oracle and/or its affiliates.

 * Other names may be trademarks of their respective owners.

 *

 * The contents of this file are subject to the terms of either the GNU

 * General Public License Version 2 only ("GPL") or the Common

 * Development and Distribution License("CDDL") (collectively, the

 * "License"). You may not use this file except in compliance with the

 * License. You can obtain a copy of the License at

 * http://www.netbeans.org/cddl-gplv2.html

 * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

 * specific language governing permissions and limitations under the

 * License.  When distributing the software, include this License Header

 * Notice in each file and include the License file at

 * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the GPL Version 2 section of the License file that

 * accompanied this code. If applicable, add the following below the

 * License Header, with the fields enclosed by brackets [] replaced by

 * your own identifying information:

 * "Portions Copyrighted [year] [name of copyright owner]"

 *

 * If you wish your version of this file to be governed by only the CDDL

 * or only the GPL Version 2, indicate your decision by adding

 * "[Contributor] elects to include this software in this distribution

 * under the [CDDL or GPL Version 2] license." If you do not indicate a

 * single choice of license, a recipient has the option to distribute

 * your version of this file under either the CDDL, the GPL Version 2 or

 * to extend the choice of license to its licensees as provided above.

 * However, if you add GPL Version 2 code and therefore, elected the GPL

 * Version 2 license, then the option applies only if the new code is

 * made subject to such option by the copyright holder.

 *

 * Contributor(s): Emilian Bold <emilian.bold@gmail.com>

 *

 * Portions Copyrighted 2012 Sun Microsystems, Inc.

 */

package org.openide.loaders;

import java.io.File;

import java.io.IOException;

import org.netbeans.junit.NbTestCase;

import org.openide.filesystems.FileLock;

import org.openide.filesystems.FileObject;

import org.openide.filesystems.LocalFileSystem;

import org.openide.util.Lookup;

public class FileObjectLookupTest extends NbTestCase {

    public FileObjectLookupTest(String testName) {

        super(testName);

    }

    LocalFileSystem lfs;

    @Override

    protected void setUp() throws Exception {

        clearWorkDir();

        File f = new File(getWorkDir(), "folder");

        assertTrue("Folder created", f.mkdir());

        File a = new File(f, "file1.txt");

        assertTrue("File created", a.createNewFile());

        lfs = new LocalFileSystem();

        lfs.setRootDirectory(getWorkDir());

    }

    @Override

    protected void tearDown() throws Exception {

        lfs.setReadOnly(true);

        clearWorkDir();

    }

    public void testHasFileObject() throws IOException {

        FileObject fo = lfs.findResource("folder/file1.txt");

        FileObject primary = fo.getLookup().lookup(FileObject.class);

        assertNotNull("It should have a FileObject in the lookup (but the primary one!)", primary);

    }

    public void testSameLookupAfterMove() throws IOException {

        FileObject fo = lfs.findResource("folder/file1.txt");

        assertNotNull(fo);

        Lookup orig = fo.getLookup();

        assertNotNull(orig);

        FileLock lock = fo.lock();

        try {

            fo = fo.move(lock, lfs.findResource("folder"), "movedfile", "txt");

        } finally {

            lock.releaseLock();

        }

        Lookup move = fo.getLookup();

        assertTrue("The lookup should remain the same after a move", orig == move);

        lock = fo.lock();

        try {

            fo.rename(lock, "renamedfile", "txt");

        } finally {

            lock.releaseLock();

        }

        Lookup rename = fo.getLookup();

        assertTrue("The lookup should remain the same after a rename", orig == rename);

    }

}