/*
* 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 java.util.Locale;
import com.facebook.presto.jdbc.internal.joda.time.Chronology;
import com.facebook.presto.jdbc.internal.joda.time.DateTimeField;
import com.facebook.presto.jdbc.internal.joda.time.DateTimeUtils;
import com.facebook.presto.jdbc.internal.joda.time.ReadablePartial;
import com.facebook.presto.jdbc.internal.joda.time.convert.ConverterManager;
import com.facebook.presto.jdbc.internal.joda.time.convert.PartialConverter;
import com.facebook.presto.jdbc.internal.joda.time.format.DateTimeFormat;
import com.facebook.presto.jdbc.internal.joda.time.format.DateTimeFormatter;
/**
* BasePartial is an abstract implementation of ReadablePartial that stores
* data in array and <code>Chronology</code> fields.
* <p>
* This class should generally not be used directly by API users.
* The {@link com.facebook.presto.jdbc.internal.joda.time.ReadablePartial} interface should be used when different
* kinds of partial objects are to be referenced.
* <p>
* BasePartial subclasses may be mutable and not thread-safe.
*
* @author Stephen Colebourne
* @since 1.0
*/
public abstract class BasePartial
extends AbstractPartial
implements ReadablePartial, Serializable {
/** Serialization version */
private static final long serialVersionUID = 2353678632973660L;
/** The chronology in use */
private final Chronology iChronology;
/** The values of each field in this partial */
private final int[] iValues;
//-----------------------------------------------------------------------
/**
* Constructs a partial with the current time, using ISOChronology in
* the default zone to extract the fields.
* <p>
* The constructor uses the default time zone, resulting in the local time
* being initialised. Once the constructor is complete, all further calculations
* are performed without reference to a timezone (by switching to UTC).
*/
protected BasePartial() {
this(DateTimeUtils.currentTimeMillis(), null);
}
/**
* Constructs a partial with the current time, using the specified chronology
* and zone to extract the fields.
* <p>
* The constructor uses the time zone of the chronology specified.
* Once the constructor is complete, all further calculations are performed
* without reference to a timezone (by switching to UTC).
*
* @param chronology the chronology, null means ISOChronology in the default zone
*/
protected BasePartial(Chronology chronology) {
this(DateTimeUtils.currentTimeMillis(), chronology);
}
/**
* Constructs a partial extracting the partial fields from the specified
* milliseconds using the ISOChronology in the default zone.
* <p>
* The constructor uses the default time zone, resulting in the local time
* being initialised. Once the constructor is complete, all further calculations
* are performed without reference to a timezone (by switching to UTC).
*
* @param instant the milliseconds from 1970-01-01T00:00:00Z
*/
protected BasePartial(long instant) {
this(instant, null);
}
/**
* Constructs a partial extracting the partial fields from the specified
* milliseconds using the chronology provided.
* <p>
* The constructor uses the time zone of the chronology specified.
* Once the constructor is complete, all further calculations are performed
* without reference to a timezone (by switching to UTC).
*
* @param instant the milliseconds from 1970-01-01T00:00:00Z
* @param chronology the chronology, null means ISOChronology in the default zone
*/
protected BasePartial(long instant, Chronology chronology) {
super();
chronology = DateTimeUtils.getChronology(chronology);
iChronology = chronology.withUTC();
iValues = chronology.get(this, instant);
}
/**
* Constructs a partial from an Object that represents a time, using the
* specified chronology.
* <p>
* The recognised object types are defined in
* {@link com.facebook.presto.jdbc.internal.joda.time.convert.ConverterManager ConverterManager} and
* include ReadableInstant, String, Calendar and Date.
* <p>
* The constructor uses the time zone of the chronology specified.
* Once the constructor is complete, all further calculations are performed
* without reference to a timezone (by switching to UTC).
*
* @param instant the datetime object
* @param chronology the chronology, null means use converter
* @throws IllegalArgumentException if the date is invalid
*/
protected BasePartial(Object instant, Chronology chronology) {
super();
PartialConverter converter = ConverterManager.getInstance().getPartialConverter(instant);
chronology = converter.getChronology(instant, chronology);
chronology = DateTimeUtils.getChronology(chronology);
iChronology = chronology.withUTC();
iValues = converter.getPartialValues(this, instant, chronology);
}
/**
* Constructs a partial from an Object that represents a time, using the
* specified chronology.
* <p>
* The recognised object types are defined in
* {@link com.facebook.presto.jdbc.internal.joda.time.convert.ConverterManager ConverterManager} and
* include ReadableInstant, String, Calendar and Date.
* <p>
* The constructor uses the time zone of the chronology specified.
* Once the constructor is complete, all further calculations are performed
* without reference to a timezone (by switching to UTC).
*
* @param instant the datetime object
* @param chronology the chronology, null means use converter
* @param parser if converting from a String, the given parser is preferred
* @throws IllegalArgumentException if the date is invalid
* @since 1.3
*/
protected BasePartial(Object instant, Chronology chronology, DateTimeFormatter parser) {
super();
PartialConverter converter = ConverterManager.getInstance().getPartialConverter(instant);
chronology = converter.getChronology(instant, chronology);
chronology = DateTimeUtils.getChronology(chronology);
iChronology = chronology.withUTC();
iValues = converter.getPartialValues(this, instant, chronology, parser);
}
/**
* Constructs a partial with specified time field values and chronology.
* <p>
* The constructor uses the time zone of the chronology specified.
* Once the constructor is complete, all further calculations are performed
* without reference to a timezone (by switching to UTC).
* <p>
* The array of values is assigned (not cloned) to the new instance.
*
* @param values the new set of values
* @param chronology the chronology, null means ISOChronology in the default zone
* @throws IllegalArgumentException if the values are invalid
*/
protected BasePartial(int[] values, Chronology chronology) {
super();
chronology = DateTimeUtils.getChronology(chronology);
iChronology = chronology.withUTC();
chronology.validate(this, values);
iValues = values;
}
/**
* Private constructor to be used by subclasses only which performs no validation.
* <p>
* Data is assigned (not cloned) to the new instance.
*
* @param base the base partial
* @param values the new set of values, not cloned, null means use base
*/
protected BasePartial(BasePartial base, int[] values) {
super();
iChronology = base.iChronology;
iValues = values;
}
/**
* Private constructor to be used by subclasses only which performs no validation.
* <p>
* Data is assigned (not cloned) to the new instance.
* This should not be used by mutable subclasses.
*
* @param base the base partial
* @param chrono the chronology to use, null means use base
*/
protected BasePartial(BasePartial base, Chronology chrono) {
super();
iChronology = chrono.withUTC();
iValues = base.iValues;
}
//-----------------------------------------------------------------------
/**
* Gets the value of the field at the specifed index.
*
* @param index the index
* @return the value
* @throws IndexOutOfBoundsException if the index is invalid
*/
public int getValue(int index) {
return iValues[index];
}
/**
* Gets an array of the value of each of the fields that this partial supports.
* <p>
* The fields are returned largest to smallest, for example Hour, Minute, Second.
* Each value corresponds to the same array index as <code>getFields()</code>
*
* @return the current values of each field (cloned), largest to smallest
*/
public int[] getValues() {
return (int[]) iValues.clone();
}
/**
* Gets the chronology of the partial which is never null.
* <p>
* The {@link Chronology} is the calculation engine behind the partial and
* provides conversion and validation of the fields in a particular calendar system.
*
* @return the chronology, never null
*/
public Chronology getChronology() {
return iChronology;
}
//-----------------------------------------------------------------------
/**
* Sets the value of the field at the specified index.
* <p>
* In version 2.0 and later, this method copies the array into the original.
* This is because the instance variable has been changed to be final to satisfy the Java Memory Model.
* This only impacts subclasses that are mutable.
*
* @param index the index
* @param value the value to set
* @throws IndexOutOfBoundsException if the index is invalid
*/
protected void setValue(int index, int value) {
DateTimeField field = getField(index);
int[] values = field.set(this, index, iValues, value);
System.arraycopy(values, 0, iValues, 0, iValues.length);
}
/**
* Sets the values of all fields.
* <p>
* In version 2.0 and later, this method copies the array into the original.
* This is because the instance variable has been changed to be final to satisfy the Java Memory Model.
* This only impacts subclasses that are mutable.
*
* @param values the array of values
*/
protected void setValues(int[] values) {
getChronology().validate(this, values);
System.arraycopy(values, 0, iValues, 0, iValues.length);
}
//-----------------------------------------------------------------------
/**
* Output the date using the specified format pattern.
*
* @param pattern the pattern specification, null means use <code>toString</code>
* @see com.facebook.presto.jdbc.internal.joda.time.format.DateTimeFormat
*/
public String toString(String pattern) {
if (pattern == null) {
return toString();
}
return DateTimeFormat.forPattern(pattern).print(this);
}
/**
* Output the date using the specified format pattern.
*
* @param pattern the pattern specification, null means use <code>toString</code>
* @param locale Locale to use, null means default
* @see com.facebook.presto.jdbc.internal.joda.time.format.DateTimeFormat
*/
public String toString(String pattern, Locale locale) throws IllegalArgumentException {
if (pattern == null) {
return toString();
}
return DateTimeFormat.forPattern(pattern).withLocale(locale).print(this);
}
}