CasProcessorFilter

All Superinterfaces:

java.lang.Cloneable, MetaDataObject, java.io.Serializable, XMLizable

All Known Implementing Classes:

CasProcessorFilterImpl
```
public interface CasProcessorFilter
extends MetaDataObject
```
Object containing a filter expression used by the CPE to route CAS's to CasProcessor. A CasProcessor can be configured in the CPE Descriptor to use filtering using an SQL-like WHERE clause: where featurespec [ and featurespec2 ...]. The featurespec can be one of these four forms and meanings:
- Feature Process CAS if the Feature is present (e.g. where Person)
- Feature! Process CAS if the Feature is not present (e.g. where Person!)
- Feature=value Process CAS if the Feature has this value( e.g. where Person=Bush)
- Feature!=value Process CAS if the Feature does not have this value (e.g. where Person!=Bush)
The featurespecs are implicitly connected with and operators and precedence rules are currently not supported.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.lang.String`	`getFilterString()`	Returns a filter expression as String
`void`	`setFilterString(java.lang.String aFilterString)`	Sets filter expression

Methods inherited from interface org.apache.uima.resource.metadata.MetaDataObject
clone, equals, getAttributeValue, getSourceUrl, getSourceUrlString, isModifiable, listAttributes, setAttributeValue, setSourceUrl

Methods inherited from interface org.apache.uima.util.XMLizable
buildFromXMLElement, buildFromXMLElement, toXML, toXML, toXML, toXML

- Method Detail
  - setFilterString
```
void setFilterString(java.lang.String aFilterString)
```
    Sets filter expression
    
    Parameters:
    
    aFilterString - - expression
  - getFilterString
```
java.lang.String getFilterString()
```
    Returns a filter expression as String
    
    Returns:
    
    - filter expression