/* * 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(); } }