org.apache.cassandra.cql3

Class Lists.DiscarderByIndex

java.lang.Object

org.apache.cassandra.cql3.Operation

org.apache.cassandra.cql3.Lists.DiscarderByIndex

Enclosing class:

Lists

public static class Lists.DiscarderByIndex
extends Operation

Nested Class Summary

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

Operation.Addition, Operation.ColumnDeletion, Operation.ElementDeletion, Operation.Prepend, Operation.RawDeletion, Operation.RawUpdate, Operation.SetElement, Operation.SetValue, Operation.Substraction

Field Summary

Fields inherited from class org.apache.cassandra.cql3.Operation

column, t

Constructor Summary

Constructors

Constructor and Description
DiscarderByIndex(ColumnDefinition column, Term idx)

Method Summary

Modifier and Type	Method and Description
void	execute(java.nio.ByteBuffer rowKey, ColumnFamily cf, Composite prefix, UpdateParameters params) Execute the operation.
boolean	requiresRead()

Methods inherited from class org.apache.cassandra.cql3.Operation

collectMarkerSpecification, getFunctions

Methods inherited from class java.lang.Object

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

Constructor Detail

DiscarderByIndex

public DiscarderByIndex(ColumnDefinition column,
                        Term idx)

Method Detail

requiresRead

public boolean requiresRead()

Overrides:

requiresRead in class Operation

Returns:

whether the operation requires a read of the previous value to be executed (only lists setterByIdx, discard and discardByIdx requires that).

execute

public void execute(java.nio.ByteBuffer rowKey,
                    ColumnFamily cf,
                    Composite prefix,
                    UpdateParameters params)
             throws InvalidRequestException

Description copied from class: Operation

Execute the operation.

Specified by:

execute in class Operation

Parameters:

rowKey - row key for the update.

cf - the column family to which to add the updates generated by this operation.

prefix - the prefix that identify the CQL3 row this operation applies to.

params - parameters of the update.

Throws:

InvalidRequestException