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

java.lang.Object
  org.apache.derby.impl.sql.catalog.DDdependableFinder
      org.apache.derby.impl.sql.catalog.DDColumnDependableFinder

All Implemented Interfaces:

DependableFinder, java.io.Externalizable, Formatable, java.io.Serializable, TypedFormat

public class DDColumnDependableFinder

extends DDdependableFinder

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

Author:

Tingjian Ge

See Also:

Serialized Form

Field Summary

private byte[]

columnBitMap

Fields inherited from class org.apache.derby.impl.sql.catalog.DDdependableFinder

Constructor Summary

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

byte[]	getColumnBitMap() Get the byte array encoding the bitmap of referenced columns in a table.
protected Dependable	getDependable(DataDictionary dd, UUID dependableObjectID) Get a dependable object, which is essentially a table descriptor with referencedColumnMap field set.
void	readExternal(java.io.ObjectInput in) Read this object from a stream of stored objects.
void	setColumnBitMap(byte[] columnBitMap) Set the byte array encoding the bitmap of referenced columns in a table.
void	writeExternal(java.io.ObjectOutput out) Write this object to a stream of stored objects.

Methods inherited from class org.apache.derby.impl.sql.catalog.DDdependableFinder

getDependable, getDependable, getSQLObjectName, getSQLObjectName, getSQLObjectType, getTypeFormatId, toString

Methods inherited from class java.lang.Object

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

Field Detail

columnBitMap

private byte[] columnBitMap

Constructor Detail

DDColumnDependableFinder

public DDColumnDependableFinder(int formatId)

Constructor same as in parent.

DDColumnDependableFinder

public DDColumnDependableFinder(int formatId,
                                byte[] columnBitMap)

Constructor given referenced column bit map byte array as in FormatableBitSet

Method Detail

getColumnBitMap

public byte[] getColumnBitMap()

Get the byte array encoding the bitmap of referenced columns in a table.

Returns:

byte array as in a FormatableBitSet encoding column bit map

setColumnBitMap

public void setColumnBitMap(byte[] columnBitMap)

Set the byte array encoding the bitmap of referenced columns in a table.

Returns:

none

getDependable

protected Dependable getDependable(DataDictionary dd,
                                   UUID dependableObjectID)
                            throws StandardException

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

Overrides:

getDependable in class DDdependableFinder

Returns:

a dependable, a table descriptor with referencedColumnMap field set

Throws:

StandardException - thrown on error

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.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 java.io.Externalizable

Overrides:

readExternal in class DDdependableFinder

Parameters:

in - read this.

Throws:

java.io.IOException

java.lang.ClassNotFoundException

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.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 java.io.Externalizable

Overrides:

writeExternal in class DDdependableFinder

Parameters:

out - write bytes here.

Throws:

java.io.IOException