/**
 * DataCleaner (community edition)
 * Copyright (C) 2014 Neopost - Customer Information Management
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.datacleaner.util.convert;

import org.apache.commons.lang.ArrayUtils;

public class SerializationStringEscaper {
    @SuppressWarnings("checkstyle:AvoidEscapedUnicodeCharacters")
    private static final String[][] ESCAPE_MAPPING =
            { { "&", "&" }, { "[", "[" }, { "]", "]" }, { ",", "," }, { "<", "<" }, { ">", ">" },
                    { """, "\"" }, { "©", "\u00a9" }, { "®", "\u00ae" }, { "€", "\u20a0" } };
    private static final String[][] ESCAPE_MAPPING_REVERSED;

    // Ughhh.
    static {
        ESCAPE_MAPPING_REVERSED = (String[][]) ArrayUtils.clone(ESCAPE_MAPPING);
        ArrayUtils.reverse(ESCAPE_MAPPING_REVERSED);
    }

    public static final String escape(String str) {
        for (final String[] mapping : ESCAPE_MAPPING) {
            final String escapedValue = mapping[1];
            if (str.contains(escapedValue)) {
                str = str.replace(escapedValue, mapping[0]);
            }
        }
        return str;
    }

    public static final String unescape(String str) {
        for (final String[] mapping : ESCAPE_MAPPING_REVERSED) {
            final String unescapedValue = mapping[0];
            if (str.contains(unescapedValue)) {
                str = str.replaceAll(unescapedValue, mapping[1]);
            }
        }
        return str;
    }
}