Package org.apache.cassandra.cql3.selection

Class TermSelector

java.lang.Object

org.apache.cassandra.cql3.selection.Selector

org.apache.cassandra.cql3.selection.TermSelector

public class TermSelector
extends Selector

Selector representing a simple term (literals or bound variables).

Note that we know the term does not include function calls for instance (this is actually enforced by the parser), those being dealt with by their own Selector.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.cql3.selection.Selector

Selector.Factory, Selector.InputRow, Selector.Kind, Selector.SelectorDeserializer, Selector.Serializer

Field Summary

Fields

Modifier and Type	Field	Description
protected static Selector.SelectorDeserializer	deserializer

Fields inherited from class org.apache.cassandra.cql3.selection.Selector

serializer

Method Summary

Modifier and Type	Method	Description
void	addFetchedColumns(ColumnFilter.Builder builder)	Add to the provided builder the column (and potential subselections) to fetch for this selection.
void	addInput(ProtocolVersion protocolVersion, Selector.InputRow input)	Add the current value from the specified ResultSetBuilder.
boolean	equals(java.lang.Object o)
java.nio.ByteBuffer	getOutput(ProtocolVersion protocolVersion)	Returns the selector output.
AbstractType<?>	getType()	Returns the Selector output type.
int	hashCode()
boolean	isTerminal()	A selector is terminal if it doesn't require any input for it's output to be computed, i.e.
static Selector.Factory	newFactory(java.lang.String name, Term term, AbstractType<?> type)
void	reset()	Reset the internal state of this Selector.
protected void	serialize(DataOutputPlus out, int version)
protected int	serializedSize(int version)

Methods inherited from class org.apache.cassandra.cql3.selection.Selector

kind, sizeOf, validateForGroupBy, writeType

Methods inherited from class java.lang.Object

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

Field Detail

deserializer

protected static final Selector.SelectorDeserializer deserializer

Method Detail

newFactory

public static Selector.Factory newFactory(java.lang.String name,
                                          Term term,
                                          AbstractType<?> type)

addFetchedColumns

public void addFetchedColumns(ColumnFilter.Builder builder)

Description copied from class: Selector

Add to the provided builder the column (and potential subselections) to fetch for this selection.

Specified by:

addFetchedColumns in class Selector

Parameters:

builder - the builder to add columns and subselections to.

addInput

public void addInput(ProtocolVersion protocolVersion,
                     Selector.InputRow input)

Description copied from class: Selector

Add the current value from the specified ResultSetBuilder.

Specified by:

addInput in class Selector

Parameters:

protocolVersion - protocol version used for serialization

input - the input row

getOutput

public java.nio.ByteBuffer getOutput(ProtocolVersion protocolVersion)

Description copied from class: Selector

Returns the selector output.

Specified by:

getOutput in class Selector

Parameters:

protocolVersion - protocol version used for serialization

Returns:

the selector output

getType

public AbstractType<?> getType()

Description copied from class: Selector

Returns the Selector output type.

Specified by:

getType in class Selector

Returns:

the Selector output type.

reset

public void reset()

Description copied from class: Selector

Reset the internal state of this Selector.

Specified by:

reset in class Selector

isTerminal

public boolean isTerminal()

Description copied from class: Selector

A selector is terminal if it doesn't require any input for it's output to be computed, i.e. if Selector.getOutput(org.apache.cassandra.transport.ProtocolVersion) result doesn't depend of Selector.addInput(org.apache.cassandra.transport.ProtocolVersion, org.apache.cassandra.cql3.selection.Selector.InputRow). This is typically the case of a constant value or functions on constant values.

Overrides:

isTerminal in class Selector

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

serializedSize

protected int serializedSize(int version)

Specified by:

serializedSize in class Selector

serialize

protected void serialize(DataOutputPlus out,
                         int version)
                  throws java.io.IOException

Specified by:

serialize in class Selector

Throws:

java.io.IOException