Package org.apache.cassandra.cql3.functions

Class TimeFcts.FloorTimestampFunction

java.lang.Object

org.apache.cassandra.cql3.functions.AbstractFunction

org.apache.cassandra.cql3.functions.NativeFunction

org.apache.cassandra.cql3.functions.NativeScalarFunction

org.apache.cassandra.cql3.functions.TimeFcts.FloorTimestampFunction

All Implemented Interfaces:

AssignmentTestable, Function, ScalarFunction

Enclosing class:

TimeFcts

public static final class TimeFcts.FloorTimestampFunction
extends NativeScalarFunction

Function that rounds a timestamp down to the closest multiple of a duration.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.cassandra.cql3.AssignmentTestable

AssignmentTestable.TestResult

Field Summary

Fields inherited from class org.apache.cassandra.cql3.functions.AbstractFunction

argTypes, name, returnType

Fields inherited from interface org.apache.cassandra.cql3.functions.Function

UNRESOLVED

Method Summary

Modifier and Type	Method	Description
final ByteBuffer	execute(Arguments arguments)	Applies this function to the specified arguments.
protected ByteBuffer	fromTimeInMillis(long timeInMillis)	Serializes the specified time.
protected boolean	isPartialApplicationMonotonic(List<ByteBuffer> partialParameters)	Checks if a partial application of the function is monotonic.
static TimeFcts.FloorTimestampFunction	newInstance()
static TimeFcts.FloorTimestampFunction	newInstanceWithStartTimeArgument()
protected void	validateDuration(Duration duration)	Validates that the duration has the correct precision.

Methods inherited from class org.apache.cassandra.cql3.functions.NativeScalarFunction

isAggregate, isCalledOnNullInput

Methods inherited from class org.apache.cassandra.cql3.functions.NativeFunction

isNative, isPure, newArguments, withLegacyName

Methods inherited from class org.apache.cassandra.cql3.functions.AbstractFunction

addFunctionsTo, argTypes, argumentsList, columnName, elementKeyspace, elementName, equals, getCompatibleTypeIfKnown, hashCode, name, referencesUserType, returnType, testAssignment, toCqlString, toString, typesMatch

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.cql3.AssignmentTestable

getCompatibleTypeIfKnown, testAssignment

Methods inherited from interface org.apache.cassandra.cql3.functions.Function

addFunctionsTo, argTypes, columnName, compare, isNative, isPure, name, newArguments, referencesUserType, returnType

Methods inherited from interface org.apache.cassandra.cql3.functions.ScalarFunction

isMonotonic, partialApplication

Method Details

newInstance

public static TimeFcts.FloorTimestampFunction newInstance()

newInstanceWithStartTimeArgument

public static TimeFcts.FloorTimestampFunction newInstanceWithStartTimeArgument()

fromTimeInMillis

protected ByteBuffer fromTimeInMillis(long timeInMillis)

Serializes the specified time.

Parameters:

timeInMillis - the time in milliseconds

Returns:

the serialized time

isPartialApplicationMonotonic

protected boolean isPartialApplicationMonotonic(List<ByteBuffer> partialParameters)

Description copied from class: NativeScalarFunction

Checks if a partial application of the function is monotonic.

A function is monotonic if it is either entirely nonincreasing or nondecreasing.

Overrides:

isPartialApplicationMonotonic in class NativeScalarFunction

Parameters:

partialParameters - the input parameters used to create the partial application of the function

Returns:

true if the partial application of the function is monotonic false otherwise.

execute

public final ByteBuffer execute(Arguments arguments)

Description copied from interface: ScalarFunction

Applies this function to the specified arguments.

Parameters:

arguments - the input arguments for the function

Returns:

the result of applying this function to the arguments

validateDuration

protected void validateDuration(Duration duration)

Validates that the duration has the correct precision.

Parameters:

duration - the duration to validate.