prajna.data.query

Class NotClause

java.lang.Object

prajna.data.DataFilter

prajna.data.query.DocFilter

prajna.data.query.NotClause

All Implemented Interfaces:

java.io.Serializable

public class NotClause
extends DocFilter

Clause representing the negation of a search filter. The NotClause only allows a single sub-filter, and matches only if the subfilter does not match.

Author:

Edward Swing

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
NotClause(DocFilter filter) Create the NotClause that returns the opposite of the filter argument.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	accept(DataRecord rec) Return whether the DataRecord is accepted by this filter.
DocFilter	getNegatedFilter() Return the filter that is negated by this NotClause.
protected boolean	matchDoc(DocData doc) Return whether the represented document is accepted by this filter.
java.lang.String	toString() Return a string representation of this NotClause.

Methods inherited from class prajna.data.query.DocFilter

accept, filterDocuments, getTag, setTag

Methods inherited from class prajna.data.DataFilter

filterRecords

Methods inherited from class java.lang.Object

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

Constructor Detail

NotClause

public NotClause(DocFilter filter)

Create the NotClause that returns the opposite of the filter argument. This clause returns true whenever the filter argument would return false, and vice-versa

Parameters:

filter - the negated filter

Method Detail

accept

public boolean accept(DataRecord rec)

Return whether the DataRecord is accepted by this filter.

Specified by:

accept in class DataFilter

Parameters:

rec - the data record to match.

Returns:

true if the record matches the filter, false otherwise

getNegatedFilter

public DocFilter getNegatedFilter()

Return the filter that is negated by this NotClause. This method returns the DocFilter used to create this NotClause

Returns:

the negated filter used to create this NotClause

matchDoc

protected boolean matchDoc(DocData doc)

Return whether the represented document is accepted by this filter.

Specified by:

matchDoc in class DocFilter

Parameters:

doc - the document record to match.

Returns:

true if the document matches the filter, false otherwise

toString

public java.lang.String toString()

Return a string representation of this NotClause.

Overrides:

toString in class java.lang.Object

Returns:

a string representation of this clause