Package org.cqframework.cql.elm.execution

Class Predecessor

java.lang.Object
org.opencds.cqf.cql.engine.elm.execution.Executable
org.cqframework.cql.elm.execution.Element
org.cqframework.cql.elm.execution.Expression
org.cqframework.cql.elm.execution.OperatorExpression
org.cqframework.cql.elm.execution.UnaryExpression
org.cqframework.cql.elm.execution.Predecessor
All Implemented Interfaces:
org.jvnet.jaxb2_commons.lang.Equals2, org.jvnet.jaxb2_commons.lang.HashCode2, org.jvnet.jaxb2_commons.lang.ToString2
Direct Known Subclasses:
PredecessorEvaluator
public class Predecessor extends UnaryExpression implements org.jvnet.jaxb2_commons.lang.Equals2, org.jvnet.jaxb2_commons.lang.HashCode2, org.jvnet.jaxb2_commons.lang.ToString2
The Predecessor operator returns the predecessor of the argument. For example, the predecessor of 2 is 1. If the argument is already the minimum value for the type, a run-time error is thrown. The Predecessor operator is defined for the Integer, Long, Decimal, Date, DateTime, and Time types. For Integer, Predecessor is equivalent to subtracting 1. For Long, Predecessor is equivalent to subtracting 1L. For Decimal, Predecessor is equivalent to subtracting the minimum precision value for the Decimal type, or 10^-08. For Date, DateTime, and Time values, Predecessor is equivalent to subtracting a time-unit quantity for the lowest specified precision of the value. For example, if the DateTime is fully specified, Predecessor is equivalent to subtracting 1 millisecond; if the DateTime is specified to the second, Predecessor is equivalent to subtracting one second, etc. If the argument is null, the result is null. If the result of the operation cannot be represented, the result is null.

Java class for Predecessor complex type.

The following schema fragment specifies the expected content contained within this class. 

 <complexType name="Predecessor">
   <complexContent>
     <extension base="{urn:hl7-org:elm:r1}UnaryExpression">
     </extension>
   </complexContent>
 </complexType>