Java Date Parse asDate(final Map map, final String key)

Description

as Date

License

Apache License

Declaration

static Date asDate(final Map<String, Object> map, final String key) 

Method Source Code

//package com.java2s;
/* Utils.java/*from   w w w  . j a va2  s  . co m*/
 *
 * Created: 2012-10-01 (Year-Month-Day)
 * Character encoding: UTF-8
 *
 ****************************************** LICENSE *******************************************
 *
 * Copyright (c) 2012 - 2013 XIAM Solutions B.V. (http://www.xiam.nl)
 *
 * 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.
 */

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.Locale;
import java.util.Map;

public class Main {
    static Date asDate(final Map<String, Object> map, final String key) {
        final Object value = map.get(key);
        if (value == null) {
            return null;
        }
        if (value instanceof String) {
            try {
                return dateFormat().parse((String) value);
            } catch (ParseException ex) {
                throw illegalArgumentException("'%s' has not a valid Date format: '%s'", key, value);
            }
        }
        throw illegalType(key, value, String.class);
    }

    private static DateFormat dateFormat() {
        return new SimpleDateFormat("EEE, dd MMM yyyy kk:mm:ss ZZZZZ", Locale.US);
    }

    private static IllegalArgumentException illegalArgumentException(String message, Object... args) {

        return new IllegalArgumentException(args.length == 0 ? message : String.format(message, args));
    }

    private static IllegalArgumentException illegalType(final String key, final Object value,
            final Class<?> expectedType) {

        return illegalArgumentException("'%s' is not of type '%s'. Value = '%s' (%s)", key, expectedType.getName(),
                value, value.getClass().getName());
    }
}

Related

1. asDate(Date date, String format)
2. asDate(final long time)
3. asDate(final String literal)
4. asDate(String date)
5. asDate(String param, SimpleDateFormat format)
6. asDate(String s)