Class DDColumnDependableFinder

java.lang.Object

org.apache.derby.impl.sql.catalog.DDdependableFinder

org.apache.derby.impl.sql.catalog.DDColumnDependableFinder

All Implemented Interfaces:

Externalizable, Serializable, DependableFinder, Formatable, TypedFormat

public class DDColumnDependableFinder
extends DDdependableFinder

Class for implementation of DependableFinder in the core DataDictionary for referenced columns in a table.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private byte[]	columnBitMap	/////////////////////////////////////////////////////////////////////

Constructor Summary

Constructors

Constructor	Description
DDColumnDependableFinder(int formatId)	Constructor same as in parent.
DDColumnDependableFinder(int formatId, byte[] columnBitMap)	Constructor given referenced column bit map byte array as in FormatableBitSet

Method Summary

Modifier and Type	Method	Description
(package private) Dependable	findDependable(DataDictionary dd, UUID dependableObjectID)	Find a dependable object, which is essentially a table descriptor with referencedColumnMap field set.
void	readExternal(ObjectInput in)	Read this object from a stream of stored objects.
void	writeExternal(ObjectOutput out)	Write this object to a stream of stored objects.

Methods inherited from class DDdependableFinder

getDependable, getSQLObjectType, getTypeFormatId, toString

Methods inherited from class Object

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

Field Details

columnBitMap

private byte[] columnBitMap

/////////////////////////////////////////////////////////////////////

Constructor Details

DDColumnDependableFinder

public DDColumnDependableFinder(int formatId)

Constructor same as in parent.

DDColumnDependableFinder

DDColumnDependableFinder(int formatId,
 byte[] columnBitMap)

Constructor given referenced column bit map byte array as in FormatableBitSet

Method Details

findDependable

Dependable findDependable(DataDictionary dd,
 UUID dependableObjectID)
                   throws StandardException

Find a dependable object, which is essentially a table descriptor with referencedColumnMap field set.

Overrides:

findDependable in class DDdependableFinder

Parameters:

dd - data dictionary

dependableObjectID - dependable object ID (table UUID)

Returns:

a dependable, a table descriptor with referencedColumnMap field set

Throws:

StandardException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
ClassNotFoundException

Read this object from a stream of stored objects. Just read the byte array, besides what the parent does.

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class DDdependableFinder

Parameters:

in - read this.

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Write this object to a stream of stored objects. Just write the byte array, besides what the parent does.

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class DDdependableFinder

Parameters:

out - write bytes here.

Throws:

IOException