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'databene commons' is an open source Java library by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

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/*
 * Copyright (C) 2004-2015 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.ConversionException;
import org.databene.commons.LocaleUtil;

import java.text.MessageFormat;
import java.util.Locale;

/**
 * Renders a single object or an array of objects into a String, similar to the java.text.MessageFormat.
 * Created: 12.11.2007 20:46:31
 * @author Volker Bergmann
 */
public class MessageConverter extends ThreadSafeConverter {

    private String pattern;
    private Locale locale;

    public MessageConverter() {
        this("{0}");
    }

    public MessageConverter(String pattern) {
    	this(pattern, LocaleUtil.getFallbackLocale());
    }

    public MessageConverter(String pattern, Locale locale) {
    	super(Object.class, String.class);
        this.pattern = pattern;
        this.locale = locale;
    }

    public void setPattern(String pattern) {
        this.pattern = pattern;
    }

    public void setLocale(Locale locale) {
        this.locale = locale;
    }

    @Override
	public String convert(Object sourceValue) throws ConversionException {
        Object tmp = sourceValue;
        if (tmp != null && !tmp.getClass().isArray())
            tmp = new Object[] { tmp };
        return new MessageFormat(pattern, locale).format(tmp);
    }

}