ch.ethz.mxquery.datamodel
Class DoubleIdentifier

java.lang.Object
  ch.ethz.mxquery.datamodel.DoubleIdentifier

All Implemented Interfaces:

Identifier

public class DoubleIdentifier
extends java.lang.Object
implements Identifier

Method Summary

int	compare(Identifier toCompare) Compares this token identifier with an other one.
static Identifier	createIdentifier(int newId, Source store) Creates an Identifier with the passed id and data soource
static Identifier[]	createInsertIdentifiers(Identifier leftBoundId, Identifier rightBoundId, int number, Source source) Creates Identifiers for Tokens that are between the ids leftBoundId and rightBoundId.
boolean	equals(java.lang.Object obj)
Source	getStore() Returns the DataSource to which the Identifier belongs to.
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Method Detail

compare

public int compare(Identifier toCompare)

Description copied from interface: Identifier

Compares this token identifier with an other one.

Specified by:

compare in interface Identifier

Returns:

0 if equal, -1 if identifier is smaller, 1 if identifier is bigger, and -2 if the two Identifier do not belong to the same data source.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getStore

public Source getStore()

Description copied from interface: Identifier

Returns the DataSource to which the Identifier belongs to.

Specified by:

getStore in interface Identifier

Returns:

the Source/Store for this identifier

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

createIdentifier

public static Identifier createIdentifier(int newId,
                                          Source store)

Creates an Identifier with the passed id and data soource

Parameters:

newId - Every newly appended node gets an integer values as new id (which must be bigger then the last given id). This cannot be handled by the Identifier because it is source dependent => every source creates when appending its id's itself.

store -

Returns:

a new identifier

createInsertIdentifiers

public static Identifier[] createInsertIdentifiers(Identifier leftBoundId,
                                                   Identifier rightBoundId,
                                                   int number,
                                                   Source source)
                                            throws MXQueryException

Creates Identifiers for Tokens that are between the ids leftBoundId and rightBoundId.

Parameters:

leftBoundId - left bound

rightBoundId - right bound

number - number of ids that the method must produce

source - data source of the newly created ids

Returns:

array of identifiers

Throws:

MXQueryException