de.lmu.ifi.dbs.elki.index.tree

Class AbstractLeafEntry

java.lang.Object

de.lmu.ifi.dbs.elki.index.tree.AbstractLeafEntry

All Implemented Interfaces:

Entry, LeafEntry, Externalizable, Serializable

Direct Known Subclasses:

MTreeLeafEntry, SpatialPointLeafEntry

public abstract class AbstractLeafEntry
extends Object
implements LeafEntry

Abstract superclass for entries in an tree based index structure.

Author:

Elke Achtert

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private DBID	id Holds the id of the object (node or data object) represented by this entry.

Constructor Summary

Constructors

Modifier	Constructor and Description
	AbstractLeafEntry() Empty constructor for serialization purposes.
protected	AbstractLeafEntry(DBID id) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o) Indicates whether some other object is "equal to" this one.
DBID	getDBID() Get the DBID of this leaf entry.
int	hashCode() Returns as hash code for the entry its id.
boolean	isLeafEntry() Returns true if this entry is an entry in a leaf node (i.e. this entry represents a data object), false otherwise.
void	readExternal(ObjectInput in) Restores the id of the object (node or data object) that is represented by this entry from the specified stream.
String	toString() Returns the id as a string representation of this entry.
void	writeExternal(ObjectOutput out) Writes the id of the object (node or data object) that is represented by this entry to the specified stream.

Methods inherited from class java.lang.Object

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

Field Detail

id

private DBID id

Holds the id of the object (node or data object) represented by this entry.

Constructor Detail

AbstractLeafEntry

public AbstractLeafEntry()

Empty constructor for serialization purposes.

AbstractLeafEntry

protected AbstractLeafEntry(DBID id)

Constructor.

Parameters:

id - the id of the object (node or data object) represented by this entry.

Method Detail

isLeafEntry

public final boolean isLeafEntry()

Description copied from interface: Entry

Returns true if this entry is an entry in a leaf node (i.e. this entry represents a data object), false otherwise.

Specified by:

isLeafEntry in interface Entry

Returns:

true if this entry is an entry in a leaf node, false otherwise

getDBID

public DBID getDBID()

Description copied from interface: LeafEntry

Get the DBID of this leaf entry.

Specified by:

getDBID in interface LeafEntry

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Writes the id of the object (node or data object) that is represented by this entry to the specified stream.

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Restores the id of the object (node or data object) that is represented by this entry from the specified stream.

Specified by:

readExternal in interface Externalizable

Throws:

ClassNotFoundException - If the class for an object being restored cannot be found.

IOException

equals

public boolean equals(Object o)

Indicates whether some other object is "equal to" this one.

Overrides:

equals in class Object

Parameters:

o - the object to be tested

Returns:

true, if o is an AbstractEntry and has the same id as this entry.

hashCode

public int hashCode()

Returns as hash code for the entry its id.

Overrides:

hashCode in class Object

Returns:

the id of the entry

toString

public String toString()

Returns the id as a string representation of this entry.

Overrides:

toString in class Object

Returns:

a string representation of this entry