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'rapiddweller Common' is an open source Java library forked from Databene Commons 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 com.rapiddweller.common.converter;

import com.rapiddweller.common.ConversionException;
import com.rapiddweller.common.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;

  /**
   * Instantiates a new Message converter.
   */
  public MessageConverter() {
    this("{0}");
  }

  /**
   * Instantiates a new Message converter.
   *
   * @param pattern the pattern
   */
  public MessageConverter(String pattern) {
    this(pattern, LocaleUtil.getFallbackLocale());
  }

  /**
   * Instantiates a new Message converter.
   *
   * @param pattern the pattern
   * @param locale  the locale
   */
  public MessageConverter(String pattern, Locale locale) {
    super(Object.class, String.class);
    this.pattern = pattern;
    this.locale = locale;
  }

  /**
   * Sets pattern.
   *
   * @param pattern the pattern
   */
  public void setPattern(String pattern) {
    this.pattern = pattern;
  }

  /**
   * Sets locale.
   *
   * @param locale the locale
   */
  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);
  }

}