org.joda.time.format
Class DateTimeParserBucket

java.lang.Object
  org.joda.time.format.DateTimeParserBucket

public class DateTimeParserBucket

extends Object

DateTimeParserBucket is an advanced class, intended mainly for parser implementations. It can also be used during normal parsing operations to capture more information about the parse.

This class allows fields to be saved in any order, but be physically set in a consistent order. This is useful for parsing against formats that allow field values to contradict each other.

Field values are applied in an order where the "larger" fields are set first, making their value less likely to stick. A field is larger than another when it's range duration is longer. If both ranges are the same, then the larger field has the longer duration. If it cannot be determined which field is larger, then the fields are set in the order they were saved.

For example, these fields were saved in this order: dayOfWeek, monthOfYear, dayOfMonth, dayOfYear. When computeMillis is called, the fields are set in this order: monthOfYear, dayOfYear, dayOfMonth, dayOfWeek.

DateTimeParserBucket is mutable and not thread-safe.

Since:

1.0

Author:

Brian S O'Neill, Fredrik Borgh

Constructor Summary

DateTimeParserBucket(long instantLocal, Chronology chrono, Locale locale)
Constucts a bucket.

DateTimeParserBucket(long instantLocal, Chronology chrono, Locale locale, Integer pivotYear)
Constucts a bucket, with the option of specifying the pivot year for two-digit year parsing.

Method Summary

long	computeMillis() Computes the parsed datetime by setting the saved fields.
long	computeMillis(boolean resetFields) Computes the parsed datetime by setting the saved fields.
long	computeMillis(boolean resetFields, String text) Computes the parsed datetime by setting the saved fields.
Chronology	getChronology() Gets the chronology of the bucket, which will be a local (UTC) chronology.
Locale	getLocale() Returns the locale to be used during parsing.
int	getOffset() Returns the time zone offset in milliseconds used by computeMillis, unless getZone doesn't return null.
Integer	getPivotYear() Returns the pivot year used for parsing two-digit years.
DateTimeZone	getZone() Returns the time zone used by computeMillis, or null if an offset is used instead.
boolean	restoreState(Object savedState) Restores the state of this bucket from a previously saved state.
void	saveField(DateTimeField field, int value) Saves a datetime field value.
void	saveField(DateTimeFieldType fieldType, int value) Saves a datetime field value.
void	saveField(DateTimeFieldType fieldType, String text, Locale locale) Saves a datetime field text value.
Object	saveState() Saves the state of this bucket, returning it in an opaque object.
void	setOffset(int offset) Set a time zone offset to be used when computeMillis is called, which overrides the time zone.
void	setPivotYear(Integer pivotYear) Sets the pivot year to use when parsing two digit years.
void	setZone(DateTimeZone zone) Set a time zone to be used when computeMillis is called, which overrides any set time zone offset.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DateTimeParserBucket

public DateTimeParserBucket(long instantLocal,
                            Chronology chrono,
                            Locale locale)

Constucts a bucket.

Parameters:

instantLocal - the initial millis from 1970-01-01T00:00:00, local time

chrono - the chronology to use

locale - the locale to use

DateTimeParserBucket

public DateTimeParserBucket(long instantLocal,
                            Chronology chrono,
                            Locale locale,
                            Integer pivotYear)

Constucts a bucket, with the option of specifying the pivot year for two-digit year parsing.

Parameters:

instantLocal - the initial millis from 1970-01-01T00:00:00, local time

chrono - the chronology to use

locale - the locale to use

pivotYear - the pivot year to use when parsing two-digit years

Since:

1.1

Method Detail

getChronology

public Chronology getChronology()

Gets the chronology of the bucket, which will be a local (UTC) chronology.

getLocale

public Locale getLocale()

Returns the locale to be used during parsing.

Returns:

the locale to use

getZone

public DateTimeZone getZone()

Returns the time zone used by computeMillis, or null if an offset is used instead.

setZone

public void setZone(DateTimeZone zone)

Set a time zone to be used when computeMillis is called, which overrides any set time zone offset.

Parameters:

zone - the date time zone to operate in, or null if UTC

getOffset

public int getOffset()

Returns the time zone offset in milliseconds used by computeMillis, unless getZone doesn't return null.

setOffset

public void setOffset(int offset)

Set a time zone offset to be used when computeMillis is called, which overrides the time zone.

getPivotYear

public Integer getPivotYear()

Returns the pivot year used for parsing two-digit years.

If null is returned, this indicates default behaviour

Returns:

Integer value of the pivot year, null if not set

Since:

1.1

setPivotYear

public void setPivotYear(Integer pivotYear)

Sets the pivot year to use when parsing two digit years.

If the value is set to null, this will indicate that default behaviour should be used.

Parameters:

pivotYear - the pivot year to use

Since:

1.1

saveField

public void saveField(DateTimeField field,
                      int value)

Saves a datetime field value.

Parameters:

field - the field, whose chronology must match that of this bucket

value - the value

saveField

public void saveField(DateTimeFieldType fieldType,
                      int value)

Saves a datetime field value.

Parameters:

fieldType - the field type

value - the value

saveField

public void saveField(DateTimeFieldType fieldType,
                      String text,
                      Locale locale)

Saves a datetime field text value.

Parameters:

fieldType - the field type

text - the text value

locale - the locale to use

saveState

public Object saveState()

Saves the state of this bucket, returning it in an opaque object. Call restoreState to undo any changes that were made since the state was saved. Calls to saveState may be nested.

Returns:

opaque saved state, which may be passed to restoreState

restoreState

public boolean restoreState(Object savedState)

Restores the state of this bucket from a previously saved state. The state object passed into this method is not consumed, and it can be used later to restore to that state again.

Parameters:

savedState - opaque saved state, returned from saveState

Returns:

true state object is valid and state restored

computeMillis

public long computeMillis()

Computes the parsed datetime by setting the saved fields. This method is idempotent, but it is not thread-safe.

Returns:

milliseconds since 1970-01-01T00:00:00Z

Throws:

IllegalArgumentException - if any field is out of range

computeMillis

public long computeMillis(boolean resetFields)

Computes the parsed datetime by setting the saved fields. This method is idempotent, but it is not thread-safe.

Parameters:

resetFields - false by default, but when true, unsaved field values are cleared

Returns:

milliseconds since 1970-01-01T00:00:00Z

Throws:

IllegalArgumentException - if any field is out of range

computeMillis

public long computeMillis(boolean resetFields,
                          String text)

Computes the parsed datetime by setting the saved fields. This method is idempotent, but it is not thread-safe.

Parameters:

resetFields - false by default, but when true, unsaved field values are cleared

text - optional text being parsed, to be included in any error message

Returns:

milliseconds since 1970-01-01T00:00:00Z

Throws:

IllegalArgumentException - if any field is out of range

Since:

1.3