com.facebook.presto.jdbc.internal.joda.time.convert.ReadableIntervalConverter 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 com.facebook.presto.jdbc.internal.joda.time.convert;
import com.facebook.presto.jdbc.internal.joda.time.Chronology;
import com.facebook.presto.jdbc.internal.joda.time.DateTimeUtils;
import com.facebook.presto.jdbc.internal.joda.time.ReadWritableInterval;
import com.facebook.presto.jdbc.internal.joda.time.ReadWritablePeriod;
import com.facebook.presto.jdbc.internal.joda.time.ReadableInterval;
/**
* Converts intervals into durations of any requested period type.
*
* @author Brian S O'Neill
* @since 1.0
*/
class ReadableIntervalConverter extends AbstractConverter
implements IntervalConverter, DurationConverter, PeriodConverter {
/**
* Singleton instance.
*/
static final ReadableIntervalConverter INSTANCE = new ReadableIntervalConverter();
/**
* Restricted constructor.
*/
protected ReadableIntervalConverter() {
super();
}
//-----------------------------------------------------------------------
/**
* Gets the millisecond length of the interval.
*
* @param object the interval
*/
public long getDurationMillis(Object object) {
return (((ReadableInterval) object)).toDurationMillis();
}
//-----------------------------------------------------------------------
/**
* Sets the values of the mutable duration from the specified interval.
*
* @param writablePeriod the period to modify
* @param object the interval to set from
* @param chrono the chronology to use
*/
public void setInto(ReadWritablePeriod writablePeriod, Object object, Chronology chrono) {
ReadableInterval interval = (ReadableInterval) object;
chrono = (chrono != null ? chrono : DateTimeUtils.getIntervalChronology(interval));
long start = interval.getStartMillis();
long end = interval.getEndMillis();
int[] values = chrono.get(writablePeriod, start, end);
for (int i = 0; i < values.length; i++) {
writablePeriod.setValue(i, values[i]);
}
}
//-----------------------------------------------------------------------
/**
* Checks if the input is a ReadableInterval.
*
* If it is, then the calling code should cast and copy the fields directly.
*
* @param object the object to convert, must not be null
* @param chrono the chronology to use, may be null
* @return true if the input is a ReadableInterval
* @throws ClassCastException if the object is invalid
*/
@Override
public boolean isReadableInterval(Object object, Chronology chrono) {
return true;
}
/**
* 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, must not be null
* @param chrono the chronology to use, may be null
* @throws ClassCastException if the object is invalid
*/
public void setInto(ReadWritableInterval writableInterval, Object object, Chronology chrono) {
ReadableInterval input = (ReadableInterval) object;
writableInterval.setInterval(input);
if (chrono != null) {
writableInterval.setChronology(chrono);
} else {
writableInterval.setChronology(input.getChronology());
}
}
//-----------------------------------------------------------------------
/**
* Returns ReadableInterval.class.
*/
public Class getSupportedType() {
return ReadableInterval.class;
}
}