org.snmp4j.agent.mo

Class MOTableIndex

java.lang.Object

org.snmp4j.agent.mo.MOTableIndex

All Implemented Interfaces:

MOTableIndexValidator

public class MOTableIndex
extends Object
implements MOTableIndexValidator

The MOTableIndex class represents a index definition of a conceptual table. An index always has to implement also the MOTableIndexValidator interface for validation of index values for newly created rows.

Version:

1.0

Author:

Frank Fock

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_INDEX_OID_LENGTH

Constructor Summary

Constructors

Constructor and Description
MOTableIndex(MOTableSubIndex[] subIndexes) Creates a index definition from an array of sub-index definitions.
MOTableIndex(MOTableSubIndex[] subIndexes, boolean impliedLength) Creates a index definition from an array of sub-index definitions where the last sub-index may have an implied length.
MOTableIndex(MOTableSubIndex[] subIndexes, boolean impliedLength, MOTableIndexValidator validator) Creates a index definition from an array of sub-index definitions where the last sub-index may have an implied length.

Method Summary

Modifier and Type	Method and Description
MOTableSubIndex	getIndex(int index) Gets the sub-index definition at the specified index.
org.snmp4j.smi.OID	getIndexOID(org.snmp4j.smi.Variable[] indexValues) Gets the index OID from an array of index values.
org.snmp4j.smi.OID[]	getIndexOIDs(org.snmp4j.smi.OID index) Split a table index into an array of object IDs each representing the value of its corresponding index object.
org.snmp4j.smi.Variable[]	getIndexValues(org.snmp4j.smi.OID index) Gets the index values contained in an index OID.
MOTableIndexValidator	getValidator() Gets the index validator (if present).
boolean	isImpliedLength()
boolean	isValidIndex(org.snmp4j.smi.OID index) Checks whether an index OID is a valid index for this index definition or not.
void	setValidator(MOTableIndexValidator validator) Sets the index validator associated with this index definition.
int	size() Gets the number of sub-index definitions in this index definition.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_INDEX_OID_LENGTH

public static final int MAX_INDEX_OID_LENGTH

See Also:

Constant Field Values

Constructor Detail

MOTableIndex

public MOTableIndex(MOTableSubIndex[] subIndexes)

Creates a index definition from an array of sub-index definitions.

Parameters:

subIndexes - an array of sub-index definitions with at least one element.

MOTableIndex

public MOTableIndex(MOTableSubIndex[] subIndexes,
                    boolean impliedLength)

Creates a index definition from an array of sub-index definitions where the last sub-index may have an implied length.

Parameters:

subIndexes - an array of sub-index definitions with at least one element.

impliedLength - if true the last sub-index has an implied length if at has a variable length at all.

MOTableIndex

public MOTableIndex(MOTableSubIndex[] subIndexes,
                    boolean impliedLength,
                    MOTableIndexValidator validator)

Creates a index definition from an array of sub-index definitions where the last sub-index may have an implied length.

Parameters:

subIndexes - an array of sub-index definitions with at least one element.

impliedLength - if true the last sub-index has an implied length if at has a variable length at all.

validator - an index validator that is called whenever a new index value needs to validated.

Method Detail

getIndex

public MOTableSubIndex getIndex(int index)

Gets the sub-index definition at the specified index.

Parameters:

index - a valid sub-index index (zero-based).

Returns:

the MOTableSubIndex.

isImpliedLength

public boolean isImpliedLength()

getValidator

public MOTableIndexValidator getValidator()

Gets the index validator (if present).

Returns:

the MOTableIndexValidator associated with this index or null.

setValidator

public void setValidator(MOTableIndexValidator validator)

Sets the index validator associated with this index definition.

Parameters:

validator - a MOTableIndexValidator instance.

size

public int size()

Gets the number of sub-index definitions in this index definition.

Returns:

the sub-index count.

isValidIndex

public boolean isValidIndex(org.snmp4j.smi.OID index)

Checks whether an index OID is a valid index for this index definition or not.

Specified by:

isValidIndex in interface MOTableIndexValidator

Parameters:

index - an OID (possibly zero length).

Returns:

true if the index is valid or false otherwise.

getIndexOIDs

public org.snmp4j.smi.OID[] getIndexOIDs(org.snmp4j.smi.OID index)

Split a table index into an array of object IDs each representing the value of its corresponding index object. For example if a table's index would be defined as INDEX { ifIndex, ipAddress } and the index given would be "1.127.0.0.1" the resulting array would be { "1", "127.0.0.1" }

Parameters:

index - an OID denoting a table's index value.

Returns:

an array of OID instances with the same size as returned by size(). If the given index is not a valid object ID null is returned.

getIndexValues

public org.snmp4j.smi.Variable[] getIndexValues(org.snmp4j.smi.OID index)

Gets the index values contained in an index OID.

Parameters:

index - the index OID.

Returns:

an array of values representing the index.

See Also:

getIndexOID(org.snmp4j.smi.Variable[])

getIndexOID

public org.snmp4j.smi.OID getIndexOID(org.snmp4j.smi.Variable[] indexValues)

Gets the index OID from an array of index values.

Parameters:

indexValues - an array of Variable instances that has to match the number and type of sub-indexes in this index.

Returns:

the corresponding index OID.

See Also:

getIndexValues(org.snmp4j.smi.OID)