/*

 * Copyright (c) 2014, 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.  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 javax.tools;

import java.io.File;

import java.nio.file.Path;

import java.util.Iterator;

/**

 * Package-private utility methods to convert between files and paths.

 *

 * @since 9

 */

class FileManagerUtils {

    private FileManagerUtils() { }

    static Iterable<Path> asPaths(final Iterable<? extends File> files) {

        return () -> new Iterator<Path>() {

            Iterator<? extends File> iter = files.iterator();

            @Override

            public boolean hasNext() {

                return iter.hasNext();

            }

            @Override

            public Path next() {

                return iter.next().toPath();

            }

        };

    }

    static Iterable<File> asFiles(final Iterable<? extends Path> paths) {

        return () -> new Iterator<File>() {

            Iterator<? extends Path> iter = paths.iterator();

            @Override

            public boolean hasNext() {

                return iter.hasNext();

            }

            @Override

            public File next() {

                Path p = iter.next();

                try {

                    return p.toFile();

                } catch (UnsupportedOperationException e) {

                    throw new IllegalArgumentException(p.toString(), e);

                }

            }

        };

    }

}