org.apache.uima.cas.impl
Class MarkerImpl

java.lang.Object
  org.apache.uima.cas.impl.MarkerImpl

All Implemented Interfaces:

Marker

public class MarkerImpl
extends java.lang.Object
implements Marker

A MarkerImpl holds a high-water "mark" in the CAS, for all views. Typically, one is obtained via the createMarker call on a CAS. Currently only one marker is used per CAS. The Marker enables testing on each CAS update if the update is "below" or "above" the marker - this is used for implementing delta serialization, in which only the changed data is sent.

Field Summary

protected boolean	isValid
protected int	nextByteHeapAddr
protected int	nextFSId
protected int	nextLongHeapAddr
protected int	nextShortHeapAddr
protected int	nextStringHeapAddr

Method Summary

boolean	isModified(FeatureStructure fs) Returns true if a FeatureStructure that existed prior to the mark represented by this Markere is modified.
boolean	isNew(FeatureStructure fs) Returns true if a FeatureStructure was created after the mark represented by this Marker object.
boolean	isValid() Return true if the Marker is still valid.

Methods inherited from class java.lang.Object

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

Field Detail

nextFSId

protected int nextFSId

nextStringHeapAddr

protected int nextStringHeapAddr

nextByteHeapAddr

protected int nextByteHeapAddr

nextShortHeapAddr

protected int nextShortHeapAddr

nextLongHeapAddr

protected int nextLongHeapAddr

isValid

protected boolean isValid

Method Detail

isNew

public boolean isNew(FeatureStructure fs)

Description copied from interface: Marker

Returns true if a FeatureStructure was created after the mark represented by this Marker object.

Specified by:

isNew in interface Marker

Returns:

isModified

public boolean isModified(FeatureStructure fs)

Description copied from interface: Marker

Returns true if a FeatureStructure that existed prior to the mark represented by this Markere is modified.

Specified by:

isModified in interface Marker

Returns:

boolean

isValid

public boolean isValid()

Description copied from interface: Marker

Return true if the Marker is still valid. A Marker becomes invalid when the CAS from which it was obtained is reset.

Specified by:

isValid in interface Marker

Returns: