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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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.
 */

package com.liferay.portal.kernel.util;

import com.liferay.petra.string.StringPool;

import java.util.Properties;

/**
 * @author Brian Wing Shun Chan
 */
public class SafeProperties extends Properties {

	@Override
	public synchronized Object get(Object key) {
		Object value = super.get(key);

		value = _decode((String)value);

		return value;
	}

	public String getEncodedProperty(String key) {
		return super.getProperty(key);
	}

	@Override
	public String getProperty(String key) {
		return (String)get(key);
	}

	@Override
	public synchronized Object put(Object key, Object value) {
		if (key == null) {
			return null;
		}

		if (value == null) {
			return super.remove(key);
		}

		value = _encode((String)value);

		return super.put(key, value);
	}

	@Override
	public synchronized Object remove(Object key) {
		if (key == null) {
			return null;
		}

		return super.remove(key);
	}

	private static String _decode(String value) {
		return StringUtil.replace(
			value, _SAFE_NEWLINE_CHARACTER, StringPool.NEW_LINE);
	}

	private static String _encode(String value) {
		return StringUtil.replace(
			value,
			new String[] {
				StringPool.RETURN_NEW_LINE, StringPool.NEW_LINE,
				StringPool.RETURN
			},
			new String[] {
				_SAFE_NEWLINE_CHARACTER, _SAFE_NEWLINE_CHARACTER,
				_SAFE_NEWLINE_CHARACTER
			});
	}

	private static final String _SAFE_NEWLINE_CHARACTER =
		"_SAFE_NEWLINE_CHARACTER_";

}




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