org.oreodata.standalone
Class AntiRecord

java.lang.Object
  |
  +--org.oreodata.AbstractRecord
        |
        +--org.oreodata.DefaultRecord
              |
              +--org.oreodata.standalone.AntiRecord

All Implemented Interfaces:

java.lang.Cloneable, java.io.Externalizable, OreoConstants, Record, java.io.Serializable

public class AntiRecord

extends DefaultRecord

An AntiRecord is to a regular record like Anti-matter is to matter. A record's antirecord cancels it out. This is really a trick so that we can treat a log with deletions in it as a stream of records (the deletion is itself a record.)

Author:

Jonathan Revusky

See Also:

Serialized Form

Field Summary

Fields inherited from interface org.oreodata.OreoConstants

RECORD_STATUS_KEY, RECORD_TYPE_KEY

Constructor Summary

AntiRecord(Record nestedRec)

Method Summary

void	freeze() make this record immutable.
java.lang.Object	getPrimaryKey() Retrieve the value of the record's primary key.
boolean	isImmutable() Have the fields all been set? Once a record is put in a DataSource, its fields are immutable.
java.lang.String	toString() Provides a default string representation of the record for a human-readable flat-file persistence scheme.

Methods inherited from class org.oreodata.DefaultRecord

get, getMutableCopy, set, setMetadata

Methods inherited from class org.oreodata.AbstractRecord

checkValidity, clearFields, equals, get, get, get, getChildren, getMetadata, getParent, getType, hasChildren, isRootElement, isStale, postCheck, preCheck, readExternal, set, set, setPrimaryKey, setValuesFromTable, writeExternal

Methods inherited from class java.lang.Object

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

Constructor Detail

AntiRecord

public AntiRecord(Record nestedRec)

Method Detail

toString

public java.lang.String toString()

Description copied from class: AbstractRecord

Provides a default string representation of the record for a human-readable flat-file persistence scheme.

Overrides:

toString in class AbstractRecord

Returns:

string of form field=value \n field=value \n\n

isImmutable

public boolean isImmutable()

Description copied from interface: Record

Have the fields all been set? Once a record is put in a DataSource, its fields are immutable.

Specified by:

isImmutable in interface Record

Overrides:

isImmutable in class DefaultRecord

getPrimaryKey

public java.lang.Object getPrimaryKey()

Description copied from interface: Record

Retrieve the value of the record's primary key.

Specified by:

getPrimaryKey in interface Record

Overrides:

getPrimaryKey in class AbstractRecord

Returns:

the value of this record's primary key, or null if it has not been set.

freeze

public void freeze()

Description copied from interface: Record

make this record immutable. This will typically only be called by an OreoDataSource object.

Specified by:

freeze in interface Record

Overrides:

freeze in class AbstractRecord