/*
* Copyright 2001-2010 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 org.joda.convert.ToString;
import com.facebook.presto.jdbc.internal.joda.time.Duration;
import com.facebook.presto.jdbc.internal.joda.time.Period;
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.format.FormatUtils;
/**
* AbstractDuration provides the common behaviour for duration classes.
* <p>
* This class should generally not be used directly by API users. The
* {@link ReadableDuration} interface should be used when different
* kinds of durations are to be referenced.
* <p>
* AbstractDuration subclasses may be mutable and not thread-safe.
*
* @author Brian S O'Neill
* @author Stephen Colebourne
* @since 1.0
*/
public abstract class AbstractDuration implements ReadableDuration {
/**
* Constructor.
*/
protected AbstractDuration() {
super();
}
//-----------------------------------------------------------------------
/**
* Get this duration as an immutable <code>Duration</code> object.
*
* @return a Duration created using the millisecond duration from this instance
*/
public Duration toDuration() {
return new Duration(getMillis());
}
//-----------------------------------------------------------------------
/**
* Converts this duration to a Period instance using the standard period type
* and the ISO chronology.
* <p>
* Only precise fields in the period type will be used. Thus, only the hour,
* minute, second and millisecond fields on the period will be used.
* The year, month, week and day fields will not be populated.
* <p>
* If the duration is small, less than one day, then this method will perform
* as you might expect and split the fields evenly.
* If the duration is larger than one day then all the remaining duration will
* be stored in the largest available field, hours in this case.
* <p>
* For example, a duration effectively equal to (365 + 60 + 5) days will be
* converted to ((365 + 60 + 5) * 24) hours by this constructor.
* <p>
* For more control over the conversion process, you must pair the duration with
* an instant, see {@link Period#Period(ReadableInstant,ReadableDuration)}.
*
* @return a Period created using the millisecond duration from this instance
*/
public Period toPeriod() {
return new Period(getMillis());
}
//-----------------------------------------------------------------------
/**
* Compares this duration with the specified duration based on length.
*
* @param other a duration to check against
* @return negative value if this is less, 0 if equal, or positive value if greater
* @throws NullPointerException if the object is null
* @throws ClassCastException if the given object is not supported
*/
public int compareTo(ReadableDuration other) {
long thisMillis = this.getMillis();
long otherMillis = other.getMillis();
// cannot do (thisMillis - otherMillis) as it can overflow
if (thisMillis < otherMillis) {
return -1;
}
if (thisMillis > otherMillis) {
return 1;
}
return 0;
}
/**
* Is the length of this duration equal to the duration passed in.
*
* @param duration another duration to compare to, null means zero milliseconds
* @return true if this duration is equal to than the duration passed in
*/
public boolean isEqual(ReadableDuration duration) {
if (duration == null) {
duration = Duration.ZERO;
}
return compareTo(duration) == 0;
}
/**
* Is the length of this duration longer than the duration passed in.
*
* @param duration another duration to compare to, null means zero milliseconds
* @return true if this duration is equal to than the duration passed in
*/
public boolean isLongerThan(ReadableDuration duration) {
if (duration == null) {
duration = Duration.ZERO;
}
return compareTo(duration) > 0;
}
/**
* Is the length of this duration shorter than the duration passed in.
*
* @param duration another duration to compare to, null means zero milliseconds
* @return true if this duration is equal to than the duration passed in
*/
public boolean isShorterThan(ReadableDuration duration) {
if (duration == null) {
duration = Duration.ZERO;
}
return compareTo(duration) < 0;
}
//-----------------------------------------------------------------------
/**
* Compares this object with the specified object for equality based
* on the millisecond length. All ReadableDuration instances are accepted.
*
* @param duration a readable duration to check against
* @return true if the length of the duration is equal
*/
public boolean equals(Object duration) {
if (this == duration) {
return true;
}
if (duration instanceof ReadableDuration == false) {
return false;
}
ReadableDuration other = (ReadableDuration) duration;
return (getMillis() == other.getMillis());
}
/**
* Gets a hash code for the duration that is compatible with the
* equals method.
*
* @return a hash code
*/
public int hashCode() {
long len = getMillis();
return (int) (len ^ (len >>> 32));
}
//-----------------------------------------------------------------------
/**
* Gets the value as a String in the ISO8601 duration format including
* only seconds and milliseconds.
* <p>
* For example, "PT72.345S" represents 1 minute, 12 seconds and 345 milliseconds.
* <p>
* For more control over the output, see
* {@link com.facebook.presto.jdbc.internal.joda.time.format.PeriodFormatterBuilder PeriodFormatterBuilder}.
*
* @return the value as an ISO8601 string
*/
@ToString
public String toString() {
long millis = getMillis();
StringBuffer buf = new StringBuffer();
buf.append("PT");
boolean negative = (millis < 0);
FormatUtils.appendUnpaddedInteger(buf, millis);
while (buf.length() < (negative ? 7 : 6)) {
buf.insert(negative ? 3 : 2, "0");
}
if ((millis / 1000) * 1000 == millis) {
buf.setLength(buf.length() - 3);
} else {
buf.insert(buf.length() - 3, ".");
}
buf.append('S');
return buf.toString();
}
}