/*

 * 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

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

 *

 * 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.

 *

 */

package javax.tools;

import javax.tools.JavaFileManager.Location;

import java.util.concurrent.*;

/**

 * Standard locations of file objects.

 *

 * @author Peter von der Ahé

 * @since 1.6

 */

public enum StandardLocation implements Location {

    /**

     * Location of new class files.

     */

    CLASS_OUTPUT,

    /**

     * Location of new source files.

     */

    SOURCE_OUTPUT,

    /**

     * Location to search for user class files.

     */

    CLASS_PATH,

    /**

     * Location to search for existing source files.

     */

    SOURCE_PATH,

    /**

     * Location to search for annotation processors.

     */

    ANNOTATION_PROCESSOR_PATH,

    /**

     * Location to search for platform classes.  Sometimes called

     * the boot class path.

     */

    PLATFORM_CLASS_PATH;

    /**

     * Gets a location object with the given name.  The following

     * property must hold: {@code locationFor(x) ==

     * locationFor(y)} if and only if {@code x.equals(y)}.

     * The returned location will be an output location if and only if

     * name ends with {@code "_OUTPUT"}.

     *

     * @param name a name

     * @return a location

     */

    public static Location locationFor(final String name) {

        if (locations.isEmpty()) {

            // can't use valueOf which throws IllegalArgumentException

            for (Location location : values())

                locations.putIfAbsent(location.getName(), location);

        }

        locations.putIfAbsent(name.toString(/* null-check */), new Location() {

                public String getName() { return name; }

                public boolean isOutputLocation() { return name.endsWith("_OUTPUT"); }

            });

        return locations.get(name);

    }

    //where

        private static ConcurrentMap<String,Location> locations

            = new ConcurrentHashMap<String,Location>();

    public String getName() { return name(); }

    public boolean isOutputLocation() {

        return this == CLASS_OUTPUT || this == SOURCE_OUTPUT;

    }

}