net.sf.farrago.fennel.tuple
Class FennelTupleDescriptor

java.lang.Object
  net.sf.farrago.fennel.tuple.FennelTupleDescriptor

All Implemented Interfaces:

Serializable

public class FennelTupleDescriptor
extends Object
implements Serializable

FennelTupleDescriptor provides the metadata describing a tuple. This is used in conjunction with FennelTupleAccessor objects to marshall and unmarshall data into FennelTupleData objects from external formats. This class is JDK 1.4 compatible.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/fennel/tuple/FennelTupleDescriptor.java#9 $

Author:

Mike Bennett

See Also:

Serialized Form

Field Summary

private List	attrs a collection of the FennelTupleAttributeDescriptor objects we're keeping.
private static long	serialVersionUID SerialVersionUID created with JDK 1.5 serialver tool.

Constructor Summary

FennelTupleDescriptor()
default constructor

Method Summary

int	add(FennelTupleAttributeDescriptor newDesc) Adds a new FennelTupleAttributeDescriptor.
boolean	containsNullable() Indicates if any descriptors we're keeping might contain nulls.
FennelTupleAttributeDescriptor	getAttr(int i) Gets an FennelTupleAttributeDescriptor given an ordinal index.
int	getAttrCount() Returns the number of attributes we are holding.

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

SerialVersionUID created with JDK 1.5 serialver tool.

See Also:

Constant Field Values

attrs

private final List attrs

a collection of the FennelTupleAttributeDescriptor objects we're keeping.

Constructor Detail

FennelTupleDescriptor

public FennelTupleDescriptor()

default constructor

Method Detail

getAttrCount

public int getAttrCount()

Returns the number of attributes we are holding.

getAttr

public FennelTupleAttributeDescriptor getAttr(int i)

Gets an FennelTupleAttributeDescriptor given an ordinal index.

add

public int add(FennelTupleAttributeDescriptor newDesc)

Adds a new FennelTupleAttributeDescriptor.

Returns:

the index where it was added

containsNullable

public boolean containsNullable()

Indicates if any descriptors we're keeping might contain nulls.