org.apache.derby.iapi.types
Class SQLTime

java.lang.Object
  org.apache.derby.iapi.types.DataType
      org.apache.derby.iapi.types.SQLTime

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, java.lang.Comparable, Formatable, Storable, TypedFormat, DataValueDescriptor, DateTimeDataValue, Orderable

public final class SQLTime
extends DataType
implements DateTimeDataValue

This contains an instance of a SQL Time Our current implementation doesn't implement time precision so the fractional seconds portion of the time is always 0. The default when no time precision is specified is 0 fractional seconds. A SQL Time without timezone information is assumed to be in the local time zone. The local time is stored as is and doesn't change if the timezone changes. This is in conformance with the SQL99 standard. The SQL92 standard indicates that the time is in GMT and changes with the timezone. The SQL99 standard clarifies this to allow time without timezoned to be stored as the local time.

Time is stored as two ints. The first int represents hour, minute, second and the second represents fractional seconds (currently 0 since we don't support time precision) encodedTime = -1 indicates null PERFORMANCE OPTIMIZATION: The java.sql.Time object is only instantiated on demand for performance reasons.

See Also:

Serialized Form

Field Summary

private static java.lang.String[]	AM_PM
private static char[]	ANY_SEPARATOR
private static int	BASE_MEMORY_USAGE
private int	encodedTime
private int	encodedTimeFraction
private static char[]	END_OF_STRING
private static char	IBM_EUR_SEPARATOR
private static char[]	IBM_EUR_SEPARATOR_OR_END
(package private) static char	JIS_SEPARATOR
private static char[]	US_OR_JIS_MINUTE_END

Fields inherited from interface org.apache.derby.iapi.types.DateTimeDataValue

DAY_FIELD, DAY_INTERVAL, FRAC_SECOND_INTERVAL, HOUR_FIELD, HOUR_INTERVAL, MINUTE_FIELD, MINUTE_INTERVAL, MONTH_FIELD, MONTH_INTERVAL, QUARTER_INTERVAL, SECOND_FIELD, SECOND_INTERVAL, WEEK_INTERVAL, YEAR_FIELD, YEAR_INTERVAL

Fields inherited from interface org.apache.derby.iapi.types.DataValueDescriptor

UNKNOWN_LOGICAL_LENGTH

Fields inherited from interface org.apache.derby.iapi.types.Orderable

ORDER_OP_EQUALS, ORDER_OP_GREATEROREQUALS, ORDER_OP_GREATERTHAN, ORDER_OP_LESSOREQUALS, ORDER_OP_LESSTHAN

Constructor Summary

	SQLTime() no-arg constructor required by Formattable
private	SQLTime(int encodedTime, int encodedTimeFraction)
	SQLTime(java.lang.String timeStr, boolean isJdbcEscape, LocaleFinder localeFinder) Construct a time from a string.
	SQLTime(java.lang.String timeStr, boolean isJdbcEscape, LocaleFinder localeFinder, java.util.Calendar cal) Construct a time from a string.
	SQLTime(java.sql.Time value)

Method Summary

DataValueDescriptor	cloneValue(boolean forceMaterialization) Clone this DataValueDescriptor.
int	compare(DataValueDescriptor other) Orderable interface
boolean	compare(int op, DataValueDescriptor other, boolean orderedNulls, boolean unknownRV) Compare this Orderable with a given Orderable for the purpose of qualification and sorting.
(package private) static int	computeEncodedTime(java.util.Calendar cal) Calculate the encoded time from a Calendar object encoded time is hour << 16 + min << 8 + sec this function is also used by SQLTimestamp
private int	computeEncodedTime(java.util.Date value) Compute encoded time value Time is represented by hour << 16 + minute << 8 + seconds
(package private) static int	computeEncodedTime(java.util.Date value, java.util.Calendar currentCal)
(package private) static int	computeEncodedTime(int hour, int minute, int second)
protected static java.lang.String	encodedTimeToString(int encodedTime) Get the String version from the encodedTime.
int	estimateMemoryUsage() Estimate the memory usage in bytes of the data value and the overhead of the class.
NumberDataValue	getDate(NumberDataValue result) Get the day of the month.
(package private) int	getEncodedTime()
protected static int	getHour(int encodedTime) Get the encoded hour value (may be different than hour value for current timezone if value encoded in a different timezone)
NumberDataValue	getHours(NumberDataValue result) Get the hour of the day out of a time or timestamp.
int	getLength() Gets the length of the data value.
protected static int	getMinute(int encodedTime) Get the encoded minute value (may be different than the minute value for current timezone if value encoded in a different timezone)
NumberDataValue	getMinutes(NumberDataValue result) Get the minute of the hour out of a time or timestamp.
NumberDataValue	getMonth(NumberDataValue result) Get the month number out of a date.
DataValueDescriptor	getNewNull() Get a new null value of the same type as this data value.
java.lang.Object	getObject() Gets the value in the data value descriptor as a int.
protected static int	getSecond(int encodedTime) Get the encoded second value (may be different than the second value for current timezone if value encoded in a different timezone)
NumberDataValue	getSeconds(NumberDataValue result) Get the second of the minute out of a time or timestamp.
java.lang.String	getString() Gets the value in the data value descriptor as a String.
java.sql.Time	getTime(java.util.Calendar cal) Get the time value Since this is a JDBC object we use the JDBC definition we use the JDBC definition, see JDBC API Tutorial and Reference section 47.3.12 Date is set to Jan. 1, 1970
(package private) static java.sql.Time	getTime(java.util.Calendar cal, int encodedTime, int nanos) Get a java.sql.Time object from an encoded time and nano-second value.
java.sql.Timestamp	getTimestamp(java.util.Calendar cal) Convert a SQL TIME to a JDBC java.sql.Timestamp.
int	getTypeFormatId() Return my format identifier.
java.lang.String	getTypeName() Get the SQL name of the datatype
NumberDataValue	getYear(NumberDataValue result) Get the year number out of a date.
int	hashCode()
boolean	isNull() Check if the value is null.
(package private) NumberDataValue	nullValueInt()
private void	parseTime(java.util.Date value)
private void	parseTime(java.lang.String timeStr, boolean isJdbcEscape, LocaleFinder localeFinder, java.util.Calendar cal)
void	readExternal(java.io.ObjectInput in)
void	restoreToNull() Restore this object to its (SQL)null value.
protected void	setFrom(DataValueDescriptor theValue) Set the value of this DataValueDescriptor based on the value of the specified DataValueDescriptor.
void	setInto(java.sql.PreparedStatement ps, int position) Adding this method to ensure that super class' setInto method doesn't get called that leads to the violation of JDBC spec( untyped nulls ) when batching is turned on.
(package private) void	setObject(java.lang.Object theValue) Set the value from a correctly typed Time object.
(package private) static void	setTimeInCalendar(java.util.Calendar cal, int encodedTime) Set the time portion of a date-time value into the passed in Calendar object from its encodedTime value.
void	setValue(java.lang.String theValue) Set the value of this DataValueDescriptor.
void	setValue(java.sql.Time value, java.util.Calendar cal) Set the value of this DataValueDescriptor.
void	setValue(java.sql.Timestamp value, java.util.Calendar cal) Set the value of this DataValueDescriptor.
void	setValueFromResultSet(java.sql.ResultSet resultSet, int colNumber, boolean isNullable) Set the value based on the value for the specified DataValueDescriptor from the specified ResultSet.
DateTimeDataValue	timestampAdd(int intervalType, NumberDataValue intervalCount, java.sql.Date currentDate, DateTimeDataValue resultHolder) Add a number of intervals to a datetime value.
NumberDataValue	timestampDiff(int intervalType, DateTimeDataValue time1, java.sql.Date currentDate, NumberDataValue resultHolder) Finds the difference between two datetime values as a number of intervals.
(package private) static void	timeToString(int hour, int minute, int second, java.lang.StringBuffer sb) Convert a time to a JDBC escape format string
java.lang.String	toString()
private SQLTimestamp	toTimestamp(java.sql.Date currentDate)
int	typePrecedence() Each built-in type in JSQL has a precedence.
void	writeExternal(java.io.ObjectOutput out)

Methods inherited from class org.apache.derby.iapi.types.DataType

checkHostVariable, cloneHolder, coalesce, compare, compare, compareTo, dataTypeConversion, equals, equals, flip, genericSetObject, getBoolean, getByte, getBytes, getDate, getDouble, getFloat, getInt, getLong, getShort, getStream, getTraceString, getTypeName, greaterOrEquals, greaterThan, hasStream, in, invalidFormat, isNotNull, isNullOp, lessOrEquals, lessThan, normalize, notEquals, outOfRange, readExternalFromArray, recycle, setBigDecimal, setInto, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, throwLangSetMismatch, throwLangSetMismatch, typeToBigDecimal

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.derby.iapi.types.DataValueDescriptor

checkHostVariable, cloneHolder, coalesce, compare, compare, equals, getBoolean, getByte, getBytes, getDate, getDouble, getFloat, getInt, getLong, getShort, getStream, getTraceString, greaterOrEquals, greaterThan, hasStream, in, isNotNull, isNullOp, lessOrEquals, lessThan, normalize, notEquals, readExternalFromArray, recycle, setBigDecimal, setInto, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, typeToBigDecimal

Field Detail

encodedTime

private int encodedTime

encodedTimeFraction

private int encodedTimeFraction

BASE_MEMORY_USAGE

private static final int BASE_MEMORY_USAGE

IBM_EUR_SEPARATOR

private static final char IBM_EUR_SEPARATOR

See Also:

Constant Field Values

IBM_EUR_SEPARATOR_OR_END

private static final char[] IBM_EUR_SEPARATOR_OR_END

JIS_SEPARATOR

static final char JIS_SEPARATOR

See Also:

Constant Field Values

US_OR_JIS_MINUTE_END

private static final char[] US_OR_JIS_MINUTE_END

ANY_SEPARATOR

private static final char[] ANY_SEPARATOR

AM_PM

private static final java.lang.String[] AM_PM

END_OF_STRING

private static final char[] END_OF_STRING

Constructor Detail

SQLTime

public SQLTime()

no-arg constructor required by Formattable

SQLTime

public SQLTime(java.sql.Time value)
        throws StandardException

Throws:

StandardException

SQLTime

private SQLTime(int encodedTime,
                int encodedTimeFraction)

SQLTime

public SQLTime(java.lang.String timeStr,
               boolean isJdbcEscape,
               LocaleFinder localeFinder)
        throws StandardException

Construct a time from a string. The allowed time formats are:

1. old ISO and IBM European standard: hh.mm[.ss]
2. IBM USA standard: hh[:mm] {AM | PM}
3. JIS & current ISO: hh:mm[:ss]

Throws:

Standard - exception if the syntax is invalid or the value is out of range.

StandardException

SQLTime

public SQLTime(java.lang.String timeStr,
               boolean isJdbcEscape,
               LocaleFinder localeFinder,
               java.util.Calendar cal)
        throws StandardException

Construct a time from a string. The allowed time formats are:

1. old ISO and IBM European standard: hh.mm[.ss]
2. IBM USA standard: hh[:mm] {AM | PM}
3. JIS & current ISO: hh:mm[:ss]

Throws:

Standard - exception if the syntax is invalid or the value is out of range.

StandardException

Method Detail

estimateMemoryUsage

public int estimateMemoryUsage()

Description copied from interface: DataValueDescriptor

Estimate the memory usage in bytes of the data value and the overhead of the class.

Specified by:

estimateMemoryUsage in interface DataValueDescriptor

Returns:

the estimated memory usage

getString

public java.lang.String getString()

Description copied from interface: DataValueDescriptor

Gets the value in the data value descriptor as a String. Throws an exception if the data value is not a string.

Specified by:

getString in interface DataValueDescriptor

Returns:

The data value as a String.

getEncodedTime

int getEncodedTime()

getTimestamp

public java.sql.Timestamp getTimestamp(java.util.Calendar cal)

Convert a SQL TIME to a JDBC java.sql.Timestamp. Behaviour is to set the date portion of the Timestamp to the actual current date, which may not match the SQL CURRENT DATE, which remains fixed for the lifetime of a SQL statement. JDBC drivers (especially network client drivers) could not be expected to fetch the CURRENT_DATE SQL value on every query that involved a TIME value, so the current date as seen by the JDBC client was picked as the logical behaviour. See DERBY-1811.

Specified by:

getTimestamp in interface DataValueDescriptor

Overrides:

getTimestamp in class DataType

Parameters:

cal - calendar for object creation

Returns:

The data value as a java.sql.Timestamp.

getObject

public java.lang.Object getObject()

Description copied from class: DataType

Gets the value in the data value descriptor as a int. Throws an exception if the data value is not receivable as a int.

Specified by:

getObject in interface DataValueDescriptor

Overrides:

getObject in class DataType

Returns:

The data value as a int.

getLength

public int getLength()

Description copied from interface: DataValueDescriptor

Gets the length of the data value. The meaning of this is implementation-dependent. For string types, it is the number of characters in the string. For numeric types, it is the number of bytes used to store the number. This is the actual length of this value, not the length of the type it was defined as. For example, a VARCHAR value may be shorter than the declared VARCHAR (maximum) length.

Specified by:

getLength in interface DataValueDescriptor

Returns:

The length of the data value

getTypeName

public java.lang.String getTypeName()

Description copied from interface: DataValueDescriptor

Get the SQL name of the datatype

Specified by:

getTypeName in interface DataValueDescriptor

Returns:

The SQL name of the datatype

getTypeFormatId

public int getTypeFormatId()

Return my format identifier.

Specified by:

getTypeFormatId in interface TypedFormat

Returns:

The identifier. (A UUID stuffed in an array of 16 bytes).

See Also:

TypedFormat.getTypeFormatId()

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Specified by:

writeExternal in interface java.io.Externalizable

Throws:

java.io.IOException - error writing data

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException

Specified by:

readExternal in interface java.io.Externalizable

Throws:

java.io.IOException - Thrown on error reading the object

See Also:

Externalizable.readExternal(java.io.ObjectInput)

cloneValue

public DataValueDescriptor cloneValue(boolean forceMaterialization)

Description copied from interface: DataValueDescriptor

Clone this DataValueDescriptor. Results in a new object that has the same value as this but can be modified independently.

Even though the objects can be modified independently regardless of the value of forceMaterialization, both the clone and the original may be dependent on the store state if forceMaterialization is set to false. An example is if you need to access the value you just read using cloneValue after the current transaction has ended, or after the source result set has been closed.

Specified by:

cloneValue in interface DataValueDescriptor

Parameters:

forceMaterialization - any streams representing the data value will be materialized if true, the data value will be kept as a stream if possible if false

Returns:

A clone of the DataValueDescriptor with the same initial value as this.

See Also:

DataValueDescriptor.cloneValue(boolean)

getNewNull

public DataValueDescriptor getNewNull()

Description copied from interface: DataValueDescriptor

Get a new null value of the same type as this data value.

Specified by:

getNewNull in interface DataValueDescriptor

See Also:

DataValueDescriptor.getNewNull()

restoreToNull

public void restoreToNull()

Description copied from interface: Storable

Restore this object to its (SQL)null value.

Specified by:

restoreToNull in interface Storable

See Also:

Storable.restoreToNull()

setValueFromResultSet

public void setValueFromResultSet(java.sql.ResultSet resultSet,
                                  int colNumber,
                                  boolean isNullable)
                           throws java.sql.SQLException,
                                  StandardException

Description copied from interface: DataValueDescriptor

Set the value based on the value for the specified DataValueDescriptor from the specified ResultSet.

Specified by:

setValueFromResultSet in interface DataValueDescriptor

Parameters:

resultSet - The specified ResultSet.

colNumber - The 1-based column # into the resultSet.

isNullable - Whether or not the column is nullable (No need to call wasNull() if not)

Throws:

java.sql.SQLException - Thrown on error

StandardException - Thrown on error

See Also:

DataValueDescriptor.setValueFromResultSet(java.sql.ResultSet, int, boolean)

compare

public int compare(DataValueDescriptor other)
            throws StandardException

Orderable interface

Specified by:

compare in interface DataValueDescriptor

Parameters:

other - The Orderable to compare this one to.

Returns:

<0 - this Orderable is less than other. 0 - this Orderable equals other. >0 - this Orderable is greater than other. The code should not explicitly look for -1, or 1.

Throws:

StandardException - thrown on failure

See Also:

Orderable

compare

public boolean compare(int op,
                       DataValueDescriptor other,
                       boolean orderedNulls,
                       boolean unknownRV)
                throws StandardException

Description copied from interface: DataValueDescriptor

Compare this Orderable with a given Orderable for the purpose of qualification and sorting. The caller gets to determine how nulls should be treated - they can either be ordered values or unknown values.

Specified by:

compare in interface DataValueDescriptor

Overrides:

compare in class DataType

Parameters:

op - Orderable.ORDER_OP_EQUALS means do an = comparison. Orderable.ORDER_OP_LESSTHAN means compare this < other. Orderable.ORDER_OP_LESSOREQUALS means compare this <= other.

other - The DataValueDescriptor to compare this one to.

orderedNulls - True means to treat nulls as ordered values, that is, treat SQL null as equal to null, and less than all other values. False means to treat nulls as unknown values, that is, the result of any comparison with a null is the UNKNOWN truth value.

unknownRV - The return value to use if the result of the comparison is the UNKNOWN truth value. In other words, if orderedNulls is false, and a null is involved in the comparison, return unknownRV. This parameter is not used orderedNulls is true.

Returns:

true if the comparison is true (duh!)

Throws:

StandardException - thrown on error

parseTime

private void parseTime(java.util.Date value)
                throws StandardException

Throws:

StandardException

parseTime

private void parseTime(java.lang.String timeStr,
                       boolean isJdbcEscape,
                       LocaleFinder localeFinder,
                       java.util.Calendar cal)
                throws StandardException

Throws:

StandardException

setObject

void setObject(java.lang.Object theValue)
         throws StandardException

Set the value from a correctly typed Time object.

Overrides:

setObject in class DataType

Throws:

StandardException

setFrom

protected void setFrom(DataValueDescriptor theValue)
                throws StandardException

Description copied from class: DataType

Set the value of this DataValueDescriptor based on the value of the specified DataValueDescriptor.

Overrides:

setFrom in class DataType

Parameters:

theValue - The DataValueDescriptor that holds the value to which we want to set this DataValueDescriptor's value.

Throws:

StandardException

setValue

public void setValue(java.sql.Time value,
                     java.util.Calendar cal)
              throws StandardException

Description copied from class: DataType

Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override

Specified by:

setValue in interface DataValueDescriptor

Overrides:

setValue in class DataType

Parameters:

value - The Time value to set this DataValueDescriptor to

cal - The time zone from the calendar is used to construct the database time value

Throws:

StandardException - thrown on failure.

See Also:

DataValueDescriptor.setValue(int)

setValue

public void setValue(java.sql.Timestamp value,
                     java.util.Calendar cal)
              throws StandardException

Description copied from class: DataType

Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override

Specified by:

setValue in interface DataValueDescriptor

Overrides:

setValue in class DataType

Parameters:

value - The Timestamp value to set this DataValueDescriptor to

cal - The time zone from the calendar is used to construct the database timestamp value

Throws:

StandardException - thrown on failure.

See Also:

DataValueDescriptor.setValue(int)

setValue

public void setValue(java.lang.String theValue)
              throws StandardException

Description copied from class: DataType

Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override

Specified by:

setValue in interface DataValueDescriptor

Overrides:

setValue in class DataType

Parameters:

theValue - The BigDecimal value to set this DataValueDescriptor to

Throws:

StandardException

nullValueInt

NumberDataValue nullValueInt()

getYear

public NumberDataValue getYear(NumberDataValue result)
                        throws StandardException

Description copied from interface: DateTimeDataValue

Get the year number out of a date.

Specified by:

getYear in interface DateTimeDataValue

Parameters:

result - The result of the previous call to this method, null if not called yet.

Returns:

A NumberDataValue containing the year number.

Throws:

StandardException - Thrown on error

See Also:

DateTimeDataValue.getYear(org.apache.derby.iapi.types.NumberDataValue)

getMonth

public NumberDataValue getMonth(NumberDataValue result)
                         throws StandardException

Description copied from interface: DateTimeDataValue

Get the month number out of a date.

Specified by:

getMonth in interface DateTimeDataValue

Parameters:

result - The result of the previous call to this method, null if not called yet.

Returns:

A NumberDataValue containing the month number.

Throws:

StandardException - Thrown on error

See Also:

DateTimeDataValue.getMonth(org.apache.derby.iapi.types.NumberDataValue)

getDate

public NumberDataValue getDate(NumberDataValue result)
                        throws StandardException

Description copied from interface: DateTimeDataValue

Get the day of the month.

Specified by:

getDate in interface DateTimeDataValue

Parameters:

result - The result of the previous call to this method, null if not called yet.

Returns:

A NumberDataValue containing the day of the month.

Throws:

StandardException - Thrown on error

See Also:

DateTimeDataValue.getDate(org.apache.derby.iapi.types.NumberDataValue)

getHours

public NumberDataValue getHours(NumberDataValue result)
                         throws StandardException

Description copied from interface: DateTimeDataValue

Get the hour of the day out of a time or timestamp.

Specified by:

getHours in interface DateTimeDataValue

Parameters:

result - The result of the previous call to this method, null if not called yet.

Returns:

A NumberDataValue containing the hour of the day.

Throws:

StandardException - Thrown on error

See Also:

DateTimeDataValue.getHours(org.apache.derby.iapi.types.NumberDataValue)

getMinutes

public NumberDataValue getMinutes(NumberDataValue result)
                           throws StandardException

Description copied from interface: DateTimeDataValue

Get the minute of the hour out of a time or timestamp.

Specified by:

getMinutes in interface DateTimeDataValue

Parameters:

result - The result of the previous call to this method, null if not called yet.

Returns:

A NumberDataValue containing the minute of the hour.

Throws:

StandardException - Thrown on error

See Also:

DateTimeDataValue.getMinutes(org.apache.derby.iapi.types.NumberDataValue)

getSeconds

public NumberDataValue getSeconds(NumberDataValue result)
                           throws StandardException

Description copied from interface: DateTimeDataValue

Get the second of the minute out of a time or timestamp.

Specified by:

getSeconds in interface DateTimeDataValue

Parameters:

result - The result of the previous call to this method, null if not called yet.

Returns:

A NumberDataValue containing the second of the minute.

Throws:

StandardException - Thrown on error

See Also:

DateTimeDataValue.getSeconds(org.apache.derby.iapi.types.NumberDataValue)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

typePrecedence

public int typePrecedence()

Description copied from class: DataType

Each built-in type in JSQL has a precedence. This precedence determines how to do type promotion when using binary operators. For example, float has a higher precedence than int, so when adding an int to a float, the result type is float. The precedence for some types is arbitrary. For example, it doesn't matter what the precedence of the boolean type is, since it can't be mixed with other types. But the precedence for the number types is critical. The SQL standard requires that exact numeric types be promoted to approximate numeric when one operator uses both. Also, the precedence is arranged so that one will not lose precision when promoting a type.

Specified by:

typePrecedence in interface DataValueDescriptor

Overrides:

typePrecedence in class DataType

Returns:

The precedence of this type.

See Also:

DataValueDescriptor.typePrecedence()

isNull

public final boolean isNull()

Check if the value is null.

Specified by:

isNull in interface Storable

Returns:

Whether or not value is logically null.

getTime

public java.sql.Time getTime(java.util.Calendar cal)

Get the time value Since this is a JDBC object we use the JDBC definition we use the JDBC definition, see JDBC API Tutorial and Reference section 47.3.12 Date is set to Jan. 1, 1970

Specified by:

getTime in interface DataValueDescriptor

Overrides:

getTime in class DataType

Parameters:

cal - calendar for object creation

Returns:

The localized time value.

setTimeInCalendar

static void setTimeInCalendar(java.util.Calendar cal,
                              int encodedTime)

Set the time portion of a date-time value into the passed in Calendar object from its encodedTime value. Note that this is only the time down to a resolution of one second. Only the HOUR_OF_DAY, MINUTE and SECOND fields are modified. The remaining state of the Calendar is not modified.

getTime

static java.sql.Time getTime(java.util.Calendar cal,
                             int encodedTime,
                             int nanos)

Get a java.sql.Time object from an encoded time and nano-second value. As required by JDBC the date component of the Time object will be set to Jan. 1, 1970

Parameters:

cal - Calendar to use for conversion

encodedTime - Derby encoded time value

nanos - number of nano-seconds.

Returns:

Valid Time object.

getHour

protected static int getHour(int encodedTime)

Get the encoded hour value (may be different than hour value for current timezone if value encoded in a different timezone)

Returns:

hour value

getMinute

protected static int getMinute(int encodedTime)

Get the encoded minute value (may be different than the minute value for current timezone if value encoded in a different timezone)

Returns:

minute value

getSecond

protected static int getSecond(int encodedTime)

Get the encoded second value (may be different than the second value for current timezone if value encoded in a different timezone)

Returns:

second value

computeEncodedTime

static int computeEncodedTime(java.util.Calendar cal)
                       throws StandardException

Calculate the encoded time from a Calendar object encoded time is hour << 16 + min << 8 + sec this function is also used by SQLTimestamp

Parameters:

cal - calendar with time set

Returns:

encoded time

Throws:

StandardException - if the time is not in the DB2 range

computeEncodedTime

static int computeEncodedTime(int hour,
                              int minute,
                              int second)
                       throws StandardException

Throws:

StandardException

timeToString

static void timeToString(int hour,
                         int minute,
                         int second,
                         java.lang.StringBuffer sb)

Convert a time to a JDBC escape format string

Parameters:

hour -

minute -

second -

sb - The resulting string is appended to this StringBuffer

encodedTimeToString

protected static java.lang.String encodedTimeToString(int encodedTime)

Get the String version from the encodedTime.

Returns:

string value.

computeEncodedTime

private int computeEncodedTime(java.util.Date value)
                        throws StandardException

Compute encoded time value Time is represented by hour << 16 + minute << 8 + seconds

Throws:

StandardException

computeEncodedTime

static int computeEncodedTime(java.util.Date value,
                              java.util.Calendar currentCal)
                       throws StandardException

Throws:

StandardException

setInto

public void setInto(java.sql.PreparedStatement ps,
                    int position)
             throws java.sql.SQLException,
                    StandardException

Adding this method to ensure that super class' setInto method doesn't get called that leads to the violation of JDBC spec( untyped nulls ) when batching is turned on.

Specified by:

setInto in interface DataValueDescriptor

Overrides:

setInto in class DataType

Throws:

java.sql.SQLException - thrown by the PreparedStatement object

StandardException - thrown by me accessing my value.

timestampAdd

public DateTimeDataValue timestampAdd(int intervalType,
                                      NumberDataValue intervalCount,
                                      java.sql.Date currentDate,
                                      DateTimeDataValue resultHolder)
                               throws StandardException

Add a number of intervals to a datetime value. Implements the JDBC escape TIMESTAMPADD function.

Specified by:

timestampAdd in interface DateTimeDataValue

Parameters:

intervalType - One of FRAC_SECOND_INTERVAL, SECOND_INTERVAL, MINUTE_INTERVAL, HOUR_INTERVAL, DAY_INTERVAL, WEEK_INTERVAL, MONTH_INTERVAL, QUARTER_INTERVAL, or YEAR_INTERVAL

intervalCount - The number of intervals to add

currentDate - Used to convert time to timestamp

resultHolder - If non-null a DateTimeDataValue that can be used to hold the result. If null then generate a new holder

Returns:

startTime + intervalCount intervals, as a timestamp

Throws:

StandardException

toTimestamp

private SQLTimestamp toTimestamp(java.sql.Date currentDate)
                          throws StandardException

Throws:

StandardException

timestampDiff

public NumberDataValue timestampDiff(int intervalType,
                                     DateTimeDataValue time1,
                                     java.sql.Date currentDate,
                                     NumberDataValue resultHolder)
                              throws StandardException

Finds the difference between two datetime values as a number of intervals. Implements the JDBC TIMESTAMPDIFF escape function.

Specified by:

timestampDiff in interface DateTimeDataValue

Parameters:

intervalType - One of FRAC_SECOND_INTERVAL, SECOND_INTERVAL, MINUTE_INTERVAL, HOUR_INTERVAL, DAY_INTERVAL, WEEK_INTERVAL, MONTH_INTERVAL, QUARTER_INTERVAL, or YEAR_INTERVAL

time1 -

currentDate - Used to convert time to timestamp

resultHolder - If non-null a NumberDataValue that can be used to hold the result. If null then generate a new holder

Returns:

the number of intervals by which this datetime is greater than time1

Throws:

StandardException