Package org.cqframework.cql.elm.execution

Class SameAs

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.BinaryExpression
org.cqframework.cql.elm.execution.SameAs
All Implemented Interfaces:
org.jvnet.jaxb2_commons.lang.Equals2, org.jvnet.jaxb2_commons.lang.HashCode2, org.jvnet.jaxb2_commons.lang.ToString2
Direct Known Subclasses:
SameAsEvaluator
public class SameAs extends BinaryExpression implements org.jvnet.jaxb2_commons.lang.Equals2, org.jvnet.jaxb2_commons.lang.HashCode2, org.jvnet.jaxb2_commons.lang.ToString2
The SameAs operator is defined for Date, DateTime, and Time values, as well as intervals. For the Interval overloads, the SameAs operator returns true if the intervals start and end at the same value, using the semantics described in the Start and End operator to determine interval boundaries. The SameAs operator compares two Date, Time, or DateTime values to the specified precision for equality. Individual component values are compared starting from the year component down to the specified precision. If all values are specified and have the same value for each component, then the result is true. If a compared component is specified in both dates, but the values are not the same, then the result is false. Otherwise the result is null, as there is not enough information to make a determination. If no precision is specified, the comparison is performed beginning with years (or hours for time values) and proceeding to the finest precision specified in either input. For Date values, precision must be one of year, month, or day. For DateTime values, precision must be one of year, month, day, hour, minute, second, or millisecond. For Time values, precision must be one of hour, minute, second, or millisecond. Note specifically that due to variability in the way week numbers are determined, comparisons involving weeks are not supported. When comparing DateTime values with different timezone offsets, implementations should normalize to the timezone offset of the evaluation request timestamp, but only when the comparison precision is hours, minutes, seconds, or milliseconds. If either argument is null, the result is null.

Java class for SameAs complex type.

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

 <complexType name="SameAs">
   <complexContent>
     <extension base="{urn:hl7-org:elm:r1}BinaryExpression">
       <attribute name="precision" type="{urn:hl7-org:elm:r1}DateTimePrecision" />
     </extension>
   </complexContent>
 </complexType>