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/*
 * Copyright (C) 2004-2014 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.databene.commons.converter;

import org.databene.commons.LocaleUtil;

import java.util.Locale;

/**
 * Converts a String's characters to upper or lower case.
 * Created: 12.06.2006 19:05:09
 * @since 0.1
 * @author Volker Bergmann
 */
public class CaseConverter extends ThreadSafeConverter {
	
    /** Mode flag for the Converter. If set to true, it converts to upper case, else to lower case */
    private boolean toUpper;

    private Locale locale;

	// Constructors ----------------------------------------------------------------------------------------------------
	
    public CaseConverter() {
        this(true);
    }

    public CaseConverter(boolean toUpper) {
        this(toUpper, LocaleUtil.getFallbackLocale());
    }

    public CaseConverter(boolean toUpper, Locale locale) {
        super(String.class, String.class);
        this.toUpper = toUpper;
        this.locale = locale;
    }

	// Properties ------------------------------------------------------------------------------------------------------
	
	/**
	 * Sets the Locale of the CaseConverter.ConverterImpl.
	 * @param locale the Locale to set
	 */
	public void setLocale(Locale locale) {
		this.locale = locale;
	}

	public void setToUpper(boolean toUpper) {
    	this.toUpper = toUpper;
    }

	// Converter interface ---------------------------------------------------------------------------------------------
	
    /**
     * @see org.databene.commons.Converter
     */
    @Override
	public String convert(String source) {
        if (source == null)
            return null;
        return (toUpper ? source.toUpperCase(locale) : source.toLowerCase(locale));
    }

}