com.loadtesting.showcase.springmvc.model.converter.FastTimeConverter.java Source code

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Here is the source code for com.loadtesting.showcase.springmvc.model.converter.FastTimeConverter.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.loadtesting.showcase.springmvc.model.converter;

import java.text.ParseException;
import java.util.Date;
import java.util.TimeZone;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.commons.lang3.time.FastDateFormat;

import com.loadtesting.showcase.springmvc.model.JavaTimeForm;

/**
 * @author Woranop Chaiyakulvat(nineworanop@gmail.com)
 */
public class FastTimeConverter {
    private final String pattern;
    private final ConcurrentHashMap<TimeZone, FastDateFormat> map;

    public FastTimeConverter(String pattern) {
        int length = TimeZone.getAvailableIDs().length;
        this.map = new ConcurrentHashMap<TimeZone, FastDateFormat>(length);
        this.pattern = pattern;
    }

    public JavaTimeForm convert(JavaTimeForm form) throws ParseException {
        FastDateFormat format1 = getFormat(form.getFromTimeZone());
        Date date = format1.parse(form.getInputDate());
        FastDateFormat format2 = getFormat(form.getToTimeZone());
        String outputDate = format2.format(date);
        JavaTimeForm resultForm = new JavaTimeForm();
        resultForm.setInputDate(form.getInputDate());
        resultForm.setFromTimeZone(form.getFromTimeZone());
        resultForm.setToTimeZone(form.getToTimeZone());
        resultForm.setOutputDate(outputDate);
        return resultForm;
    }

    public FastDateFormat getFormat(TimeZone timeZone) {
        FastDateFormat result = map.get(timeZone);
        if (result == null) {
            FastDateFormat newValue = FastDateFormat.getInstance(pattern, timeZone);
            result = map.putIfAbsent(timeZone, newValue);
            if (result == null) {
                result = newValue;
            }
        }
        return result;
    }
}