Package org.openmrs.logic.op

Interface Summary

Interface	Description
ComparisonOperator	Marker interface to keep track of the ComparisonOperator sub type
LogicalOperator	Marker for the logical operator
Operand	This is a marker interface for things that can be operated on by an Operator in a LogicExpression
Operator	An operator used within a logical expression.
TransformOperator	Marker for all transform operator.

Class Summary

Class	Description
After	The After operator works with a date object to tests whether an expression will yield result after a certain date position.
And	The And operator is a conjunction operator to combine two or more LogicCriteria objects.
AsOf	The AsOf operator works with a date object to test whether an expression will yield result after a certain date position Example: - logicService.parse("'CD4 COUNT'").asOf(Context.getDateformat().parse("2009/12/04"); The above will give us a criteria to check if there's "CD4 COUNT" observations as of 12/04/2009
Average	The Average operator will calculate the average result from a collection of result returned by the logic expression Example: - logicService.parse("'CD4 COUNT'").average(); The above will give us a criteria to get the average result of the "CD4 COUNT" observations
Before	The Before operator works with a date object to tests whether an expression will yield result before a certain date position.
Contains	The Contains operator will return results that contains the operand .
Count	The Count operator will return the number of results returned by the logic service Example: - logicService.parse("EncounterDataSource.ENCOUNTER_KEY").count(); The above will give us a criteria to get the number of encounter type we have in the system
Distinct	The Distinct operator will filter out duplicate results and return a set of distinct results.
Equals	The Equals operator will test whether a result equals to an operand or not.
Exists	The Exists operator test whether a criteria will exist for person or not.
First	The First operator will return a subset result of the entire result returned by the criteria Example: - logicService.parse("'CD4 COUNT'").first(2); The above will give us a criteria to get the first two "CD4 COUNT" observations
GreaterThan	The GreaterThan operator will return result that have a greater value than the operand.
GreaterThanEquals	The GreaterThanEquals operator will return result that have a greater value than or equals to the operand.
In	The In operator test whether a value is in a collection of value or not.
Last	The Last operator will return a subset result of the entire result returned by the criteria.
LessThan	The LessThan operator will return result that have a less value than the operand.
LessThanEquals	The LessThan operator will return result that have a less value than or equals to the operand.
Not	The Not operator will negate the a logic expression
NotExists	The NotExists operator test whether a criteria will exist for person or not.
Or	The Or operator is a disjunction operator to combine two or more LogicCriteria objects.
Within	The Within operator tests whether an expression will yield true for a certain time frame.