org.efaps.esjp.common.format.DateTimeFormatFcty.java Source code

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Here is the source code for org.efaps.esjp.common.format.DateTimeFormatFcty.java

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/*
 * Copyright 2003 - 2016 The eFaps Team
 *
 * 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.efaps.esjp.common.format;

import java.text.FieldPosition;
import java.text.Format;
import java.text.ParsePosition;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

import org.apache.commons.lang3.text.FormatFactory;
import org.efaps.admin.program.esjp.EFapsApplication;
import org.efaps.admin.program.esjp.EFapsFormatFactory;
import org.efaps.admin.program.esjp.EFapsUUID;
import org.joda.time.DateTime;

/**
 * TODO comment!
 *
 * @author The eFaps Team
 */
@EFapsUUID("4724d655-3070-41a1-9ba3-1b7b8d02d4a3")
@EFapsApplication("eFaps-Kernel")
@EFapsFormatFactory(name = "datetime")
public class DateTimeFormatFcty implements FormatFactory {

    /**
     * static Format instance.
     */
    private static final Map<String, Format> FORMATS = new HashMap<>();

    @Override
    public Format getFormat(final String _name, final String _arguments, final Locale _locale) {
        Format ret;
        final String key = _locale.toLanguageTag() + "_" + _arguments;
        if (DateTimeFormatFcty.FORMATS.containsKey(key)) {
            ret = DateTimeFormatFcty.FORMATS.get(key);
        } else {
            ret = new DateTimeFormat(_arguments, _locale);
            DateTimeFormatFcty.FORMATS.put(key, ret);
        }
        return ret;
    }

    @Override
    public String toString() {
        return "DateTimeFormat";
    }

    /**
     * The actual format class.
     */
    private static class DateTimeFormat extends Format {

        /**
         *
         */
        private static final long serialVersionUID = 1L;

        /**
         * Pattern for this format,
         */
        private final String pattern;

        /**
         * Locale for this format.
         */
        private final Locale locale;

        /**
         * Instantiates a new date time format.
         *
         * @param _pattern the _pattern
         * @param _locale Locale
         */
        DateTimeFormat(final String _pattern, final Locale _locale) {
            this.pattern = _pattern;
            this.locale = _locale;
        }

        @Override
        public StringBuffer format(final Object _obj, final StringBuffer _toAppendTo, final FieldPosition _pos) {
            if (_obj != null && _obj instanceof DateTime) {
                _toAppendTo.append(((DateTime) _obj).toString(this.pattern, this.locale));
            }
            return _toAppendTo;
        }

        @Override
        public Object parseObject(final String _source, final ParsePosition _pos) {
            throw new UnsupportedOperationException();
        }
    }
}