org.joda.time.convert.NullConverter Maven / Gradle / Ivy
/*
* Copyright 2001-2009 Stephen Colebourne
*
* 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.joda.time.convert;
import org.joda.time.Chronology;
import org.joda.time.DateTimeUtils;
import org.joda.time.Period;
import org.joda.time.ReadWritableInterval;
import org.joda.time.ReadWritablePeriod;
/**
* NullConverter converts null to an instant, partial, duration, period
* or interval. Null means now for instant/partial, zero for duration/period
* and from now to now for interval.
*
* @author Stephen Colebourne
* @author Brian S O'Neill
* @since 1.0
*/
class NullConverter extends AbstractConverter
implements InstantConverter, PartialConverter, DurationConverter, PeriodConverter, IntervalConverter {
/**
* Singleton instance.
*/
static final NullConverter INSTANCE = new NullConverter();
/**
* Restricted constructor.
*/
protected NullConverter() {
super();
}
//-----------------------------------------------------------------------
/**
* Gets the millisecond duration, which is zero.
*
* @param object the object to convert, which is null
* @return the millisecond duration
*/
public long getDurationMillis(Object object) {
return 0L;
}
//-----------------------------------------------------------------------
/**
* Sets the given ReadWritableDuration to zero milliseconds.
*
* @param duration duration to get modified
* @param object the object to convert, which is null
* @param chrono the chronology to use
* @throws NullPointerException if the duration is null
*/
public void setInto(ReadWritablePeriod duration, Object object, Chronology chrono) {
duration.setPeriod((Period) null);
}
//-----------------------------------------------------------------------
/**
* Extracts interval endpoint values from an object of this converter's
* type, and sets them into the given ReadWritableInterval.
*
* @param writableInterval interval to get modified, not null
* @param object the object to convert, which is null
* @param chrono the chronology to use, may be null
* @throws NullPointerException if the interval is null
*/
public void setInto(ReadWritableInterval writableInterval, Object object, Chronology chrono) {
writableInterval.setChronology(chrono);
long now = DateTimeUtils.currentTimeMillis();
writableInterval.setInterval(now, now);
}
//-----------------------------------------------------------------------
/**
* Returns null.
*
* @return null
*/
public Class getSupportedType() {
return null;
}
}