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/*
 *  Copyright 2001-2011 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.base;

import java.io.Serializable;

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.Interval;
import com.facebook.presto.jdbc.internal.joda.time.Period;
import com.facebook.presto.jdbc.internal.joda.time.PeriodType;
import com.facebook.presto.jdbc.internal.joda.time.ReadableDuration;
import com.facebook.presto.jdbc.internal.joda.time.ReadableInstant;
import com.facebook.presto.jdbc.internal.joda.time.convert.ConverterManager;
import com.facebook.presto.jdbc.internal.joda.time.convert.DurationConverter;
import com.facebook.presto.jdbc.internal.joda.time.field.FieldUtils;

/**
 * BaseDuration is an abstract implementation of ReadableDuration that stores
 * data in a long duration milliseconds field.
 * 

* This class should generally not be used directly by API users. * The {@link ReadableDuration} interface should be used when different * kinds of duration objects are to be referenced. *

* BaseDuration subclasses may be mutable and not thread-safe. * * @author Brian S O'Neill * @author Stephen Colebourne * @since 1.0 */ public abstract class BaseDuration extends AbstractDuration implements ReadableDuration, Serializable { /** Serialization version */ private static final long serialVersionUID = 2581698638990L; /** The duration length */ private volatile long iMillis; /** * Creates a duration from the given millisecond duration. * * @param duration the duration, in milliseconds */ protected BaseDuration(long duration) { super(); iMillis = duration; } /** * Creates a duration from the given interval endpoints. * * @param startInstant interval start, in milliseconds * @param endInstant interval end, in milliseconds * @throws ArithmeticException if the duration exceeds a 64-bit long */ protected BaseDuration(long startInstant, long endInstant) { super(); iMillis = FieldUtils.safeSubtract(endInstant, startInstant); } /** * Creates a duration from the given interval endpoints. * * @param start interval start, null means now * @param end interval end, null means now * @throws ArithmeticException if the duration exceeds a 64-bit long */ protected BaseDuration(ReadableInstant start, ReadableInstant end) { super(); if (start == end) { iMillis = 0L; } else { long startMillis = DateTimeUtils.getInstantMillis(start); long endMillis = DateTimeUtils.getInstantMillis(end); iMillis = FieldUtils.safeSubtract(endMillis, startMillis); } } /** * Creates a duration from the specified object using the * {@link com.facebook.presto.jdbc.internal.joda.time.convert.ConverterManager ConverterManager}. * * @param duration duration to convert * @throws IllegalArgumentException if duration is invalid */ protected BaseDuration(Object duration) { super(); DurationConverter converter = ConverterManager.getInstance().getDurationConverter(duration); iMillis = converter.getDurationMillis(duration); } //----------------------------------------------------------------------- /** * Gets the length of this duration in milliseconds. * * @return the length of the duration in milliseconds. */ public long getMillis() { return iMillis; } //----------------------------------------------------------------------- /** * Sets the length of this duration in milliseconds. * * @param duration the new length of the duration */ protected void setMillis(long duration) { iMillis = duration; } //----------------------------------------------------------------------- /** * Converts this duration to a Period instance using the specified period type * and the ISO chronology. *

* Only precise fields in the period type will be used. * At most these are hours, minutes, seconds and millis - the period * type may restrict the selection further. *

* For more control over the conversion process, you must pair the duration with * an instant, see {@link #toPeriodFrom(ReadableInstant, PeriodType)}. * * @param type the period type to use, null means standard * @return a Period created using the millisecond duration from this instance */ public Period toPeriod(PeriodType type) { return new Period(getMillis(), type); } /** * Converts this duration to a Period instance using the standard period type * and the specified chronology. *

* Only precise fields in the period type will be used. * Exactly which fields are precise depends on the chronology. * Only the time fields are precise for ISO chronology with a time zone. * However, ISO UTC also has precise days and weeks. *

* For more control over the conversion process, you must pair the duration with * an instant, see {@link #toPeriodFrom(ReadableInstant)} and * {@link #toPeriodTo(ReadableInstant)} * * @param chrono the chronology to use, null means ISO default * @return a Period created using the millisecond duration from this instance */ public Period toPeriod(Chronology chrono) { return new Period(getMillis(), chrono); } /** * Converts this duration to a Period instance using the specified period type * and chronology. *

* Only precise fields in the period type will be used. * Exactly which fields are precise depends on the chronology. * Only the time fields are precise for ISO chronology with a time zone. * However, ISO UTC also has precise days and weeks. *

* For more control over the conversion process, you must pair the duration with * an instant, see {@link #toPeriodFrom(ReadableInstant, PeriodType)} and * {@link #toPeriodTo(ReadableInstant, PeriodType)} * * @param type the period type to use, null means standard * @param chrono the chronology to use, null means ISO default * @return a Period created using the millisecond duration from this instance */ public Period toPeriod(PeriodType type, Chronology chrono) { return new Period(getMillis(), type, chrono); } /** * Converts this duration to a Period instance by adding the duration to a start * instant to obtain an interval using the standard period type. *

* This conversion will determine the fields of a period accurately. * The results are based on the instant millis, the chronology of the instant, * the standard period type and the length of this duration. * * @param startInstant the instant to calculate the period from, null means now * @return a Period created using the millisecond duration from this instance */ public Period toPeriodFrom(ReadableInstant startInstant) { return new Period(startInstant, this); } /** * Converts this duration to a Period instance by adding the duration to a start * instant to obtain an interval. *

* This conversion will determine the fields of a period accurately. * The results are based on the instant millis, the chronology of the instant, * the period type and the length of this duration. * * @param startInstant the instant to calculate the period from, null means now * @param type the period type determining how to split the duration into fields, null means All type * @return a Period created using the millisecond duration from this instance */ public Period toPeriodFrom(ReadableInstant startInstant, PeriodType type) { return new Period(startInstant, this, type); } /** * Converts this duration to a Period instance by subtracting the duration * from an end instant to obtain an interval using the standard period * type. *

* This conversion will determine the fields of a period accurately. * The results are based on the instant millis, the chronology of the instant, * the standard period type and the length of this duration. * * @param endInstant the instant to calculate the period to, null means now * @return a Period created using the millisecond duration from this instance */ public Period toPeriodTo(ReadableInstant endInstant) { return new Period(this, endInstant); } /** * Converts this duration to a Period instance by subtracting the duration * from an end instant to obtain an interval using the standard period * type. *

* This conversion will determine the fields of a period accurately. * The results are based on the instant millis, the chronology of the instant, * the period type and the length of this duration. * * @param endInstant the instant to calculate the period to, null means now * @param type the period type determining how to split the duration into fields, null means All type * @return a Period created using the millisecond duration from this instance */ public Period toPeriodTo(ReadableInstant endInstant, PeriodType type) { return new Period(this, endInstant, type); } /** * Converts this duration to an Interval starting at the specified instant. * * @param startInstant the instant to start the interval at, null means now * @return an Interval starting at the specified instant */ public Interval toIntervalFrom(ReadableInstant startInstant) { return new Interval(startInstant, this); } /** * Converts this duration to an Interval ending at the specified instant. * * @param endInstant the instant to end the interval at, null means now * @return an Interval ending at the specified instant */ public Interval toIntervalTo(ReadableInstant endInstant) { return new Interval(this, endInstant); } }





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