/*
* Copyright 2004-2015 the Seasar Foundation and the Others.
*
* 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.seasar.extension.dxo.converter.impl;
import java.text.DateFormat;
import java.util.Calendar;
import java.util.Date;
import org.seasar.extension.dxo.converter.ConversionContext;
/**
* 任意のオブジェクトから{@link String}への変換を行うコンバータです。
* <p>
* 変換は次のように行われます。
* </p>
* <ul>
* <li>変換元のオブジェクトが{@link String}なら、変換元をそのまま変換先とします。</li>
* <li>変換元のオブジェクトが<code>char</code>の配列なら、その配列を内容とする文字列を変換先とします。</li>
* <li>変換元のオブジェクトが列挙なら、変換元の名前を変換先とします。</li>
* <li>変換元のオブジェクトが{@link java.sql.Date}・{@link java.sql.Time}・{@link java.sql.Timestamp}・{@link Date}・{@link Calendar}なら、
* その値をフォーマットに従って文字列化した結果を変換先とします。</li>
* <li>それ以外の場合は、変換元オブジェクトの文字列表現を変換先とします。</li>
* </ul>
*
* @author Satoshi Kimura
* @author koichik
*/
public class StringConverter extends AbstractConverter {
public Class[] getSourceClasses() {
return new Class[] { Object.class };
}
public Class getDestClass() {
return String.class;
}
public Object convert(final Object source, final Class destClass,
final ConversionContext context) {
if (source == null) {
return null;
}
if (source instanceof String) {
return source;
}
if (source instanceof char[]) {
return new String((char[]) source);
}
if (isEnum(source.getClass())) {
return getEnumName(source);
}
if (source instanceof java.sql.Date) {
final DateFormat formatter = context.getDateFormat();
if (formatter != null) {
return formatter.format((java.sql.Date) source);
}
}
if (source instanceof java.sql.Time) {
final DateFormat formatter = context.getTimeFormat();
if (formatter != null) {
return formatter.format((java.sql.Time) source);
}
}
if (source instanceof java.sql.Timestamp) {
final DateFormat formatter = context.getTimestampFormat();
if (formatter != null) {
return formatter.format((java.sql.Timestamp) source);
}
}
if (source instanceof Date) {
final DateFormat formatter = context.getDateFormat();
if (formatter != null) {
return formatter.format((Date) source);
}
}
if (source instanceof Calendar) {
final DateFormat formatter = context.getDateFormat();
if (formatter != null) {
return formatter.format(new Date(((Calendar) source)
.getTimeInMillis()));
}
}
return source.toString();
}
}