jp.xet.baseunits.spring.StringTimePointGenericConverter.java Source code

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Here is the source code for jp.xet.baseunits.spring.StringTimePointGenericConverter.java

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/*
 * Copyright 2013 Daisuke Miyamoto. (http://d.hatena.ne.jp/daisuke-m)
 *
 * 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 jp.xet.baseunits.spring;

import java.text.ParseException;
import java.util.HashSet;
import java.util.Set;
import java.util.TimeZone;

import jp.xet.baseunits.time.TimePoint;

import com.google.common.base.Preconditions;

import org.springframework.core.convert.TypeDescriptor;
import org.springframework.core.convert.converter.GenericConverter;

/**
 * {@link GenericConverter} implementation from {@link String} to {@link TimePoint}.
 * 
 * @author daisuke
 * @since 2.10
 */
public class StringTimePointGenericConverter implements GenericConverter {

    private static final String DEFAULT_FORMAT = "EEE MMM dd HH:mm:ss zzz yyyy";

    private String format;

    private TimeZone timeZone;

    /**
     * ??
     */
    public StringTimePointGenericConverter() {
        this(DEFAULT_FORMAT, TimeZone.getDefault());
    }

    /**
     * ??
     * 
     * @param format 
     * @throws NullPointerException ?{@code null}???
     */
    public StringTimePointGenericConverter(String format) {
        this(format, TimeZone.getDefault());
    }

    /**
     * ??
     * 
     * @param format 
     * @param timeZone 
     * @throws NullPointerException ?{@code null}???
     */
    public StringTimePointGenericConverter(String format, TimeZone timeZone) {
        Preconditions.checkNotNull(format);
        Preconditions.checkNotNull(timeZone);
        this.format = format;
        this.timeZone = timeZone;
    }

    /**
     * ??
     * 
     * @param timeZone 
     * @throws NullPointerException ?{@code null}???
     */
    public StringTimePointGenericConverter(TimeZone timeZone) {
        this(DEFAULT_FORMAT, timeZone);
    }

    @Override
    public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
        try {
            return source == null ? null : TimePoint.parse((String) source, format, timeZone);
        } catch (ParseException e) {
            throw new IllegalArgumentException(e);
        }
    }

    @Override
    public Set<ConvertiblePair> getConvertibleTypes() {
        Set<ConvertiblePair> convertibleTypes = new HashSet<ConvertiblePair>();
        convertibleTypes.add(new ConvertiblePair(String.class, TimePoint.class));
        return convertibleTypes;
    }
}