Package org.apache.cassandra.cql3.functions

Class JavaUDF

java.lang.Object

org.apache.cassandra.cql3.functions.JavaUDF

public abstract class JavaUDF
extends java.lang.Object

Base class for all Java UDFs. Used to separate internal classes like UDFunction from user provided code. Only references to this class (and generated implementations) are allowed - references from this class back to C* code are not allowed (except argument/return type information).

Field Summary

Fields

Modifier and Type	Field	Description
protected UDFContext	udfContext

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	JavaUDF(TypeCodec<java.lang.Object> returnCodec, TypeCodec<java.lang.Object>[] argCodecs, UDFContext udfContext)

Method Summary

Modifier and Type	Method	Description
protected java.lang.Object	compose(ProtocolVersion protocolVersion, int argIndex, java.nio.ByteBuffer value)
protected boolean	compose_boolean(ProtocolVersion protocolVersion, int argIndex, java.nio.ByteBuffer value)
protected byte	compose_byte(ProtocolVersion protocolVersion, int argIndex, java.nio.ByteBuffer value)
protected double	compose_double(ProtocolVersion protocolVersion, int argIndex, java.nio.ByteBuffer value)
protected float	compose_float(ProtocolVersion protocolVersion, int argIndex, java.nio.ByteBuffer value)
protected int	compose_int(ProtocolVersion protocolVersion, int argIndex, java.nio.ByteBuffer value)
protected long	compose_long(ProtocolVersion protocolVersion, int argIndex, java.nio.ByteBuffer value)
protected short	compose_short(ProtocolVersion protocolVersion, int argIndex, java.nio.ByteBuffer value)
protected java.nio.ByteBuffer	decompose(ProtocolVersion protocolVersion, java.lang.Object value)
protected abstract java.lang.Object	executeAggregateImpl(ProtocolVersion protocolVersion, java.lang.Object firstParam, java.util.List<java.nio.ByteBuffer> params)
protected abstract java.nio.ByteBuffer	executeImpl(ProtocolVersion protocolVersion, java.util.List<java.nio.ByteBuffer> params)

Methods inherited from class java.lang.Object

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

Field Detail

udfContext

protected final UDFContext udfContext

Constructor Detail

JavaUDF

protected JavaUDF(TypeCodec<java.lang.Object> returnCodec,
                  TypeCodec<java.lang.Object>[] argCodecs,
                  UDFContext udfContext)

Method Detail

executeImpl

protected abstract java.nio.ByteBuffer executeImpl(ProtocolVersion protocolVersion,
                                                   java.util.List<java.nio.ByteBuffer> params)

executeAggregateImpl

protected abstract java.lang.Object executeAggregateImpl(ProtocolVersion protocolVersion,
                                                         java.lang.Object firstParam,
                                                         java.util.List<java.nio.ByteBuffer> params)

compose

protected java.lang.Object compose(ProtocolVersion protocolVersion,
                                   int argIndex,
                                   java.nio.ByteBuffer value)

decompose

protected java.nio.ByteBuffer decompose(ProtocolVersion protocolVersion,
                                        java.lang.Object value)

compose_float

protected float compose_float(ProtocolVersion protocolVersion,
                              int argIndex,
                              java.nio.ByteBuffer value)

compose_double

protected double compose_double(ProtocolVersion protocolVersion,
                                int argIndex,
                                java.nio.ByteBuffer value)

compose_byte

protected byte compose_byte(ProtocolVersion protocolVersion,
                            int argIndex,
                            java.nio.ByteBuffer value)

compose_short

protected short compose_short(ProtocolVersion protocolVersion,
                              int argIndex,
                              java.nio.ByteBuffer value)

compose_int

protected int compose_int(ProtocolVersion protocolVersion,
                          int argIndex,
                          java.nio.ByteBuffer value)

compose_long

protected long compose_long(ProtocolVersion protocolVersion,
                            int argIndex,
                            java.nio.ByteBuffer value)

compose_boolean

protected boolean compose_boolean(ProtocolVersion protocolVersion,
                                  int argIndex,
                                  java.nio.ByteBuffer value)