/*

 * Copyright (c) 2012, 2019, 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.

 */

import java.io.File;

import java.util.Collection;

import java.util.LinkedHashSet;

import java.util.Set;

/**

 * RelativeFileSet

 *

 * A class encapsulating a directory and a set of files within it.

 */

class RelativeFileSet {

    private File basedir;

    private Set<String> files = new LinkedHashSet<>();

    RelativeFileSet(File base, Collection<File> files) {

        basedir = base;

        String baseAbsolute = basedir.getAbsolutePath();

        for (File f: files) {

            String absolute = f.getAbsolutePath();

            if (!absolute.startsWith(baseAbsolute)) {

                throw new RuntimeException("File " + f.getAbsolutePath() +

                        " does not belong to " + baseAbsolute);

            }

            if (!absolute.equals(baseAbsolute)) {

                    // possible in jpackage case

                this.files.add(absolute.substring(baseAbsolute.length()+1));

            }

        }

    }

    RelativeFileSet(File base, Set<File> files) {

        this(base, (Collection<File>) files);

    }

    File getBaseDirectory() {

        return basedir;

    }

    Set<String> getIncludedFiles() {

        return files;

    }

    @Override

    public String toString() {

        if (files.size() ==  1) {

            return "" + basedir + File.pathSeparator + files;

        }

        return "RelativeFileSet {basedir:" + basedir

                + ", files: {" + files + "}";

    }

}