org.apache.openjpa.jdbc.kernel.exps
Class Sum

java.lang.Object
  org.apache.openjpa.jdbc.kernel.exps.AbstractVal
      org.apache.openjpa.jdbc.kernel.exps.UnaryOp
          org.apache.openjpa.jdbc.kernel.exps.Sum

All Implemented Interfaces:

Serializable, Val, Value

 class Sum
extends UnaryOp

Sum.

Author:

Abe White

Field Summary

Fields inherited from class org.apache.openjpa.jdbc.kernel.exps.AbstractVal

FALSE, TRUE

Fields inherited from interface org.apache.openjpa.jdbc.kernel.exps.Val

ABS_VAL, ARGS_VAL, CONCAT_VAL, FORCE_OUTER, INDEXOF_VAL, JOIN_REL, LENGTH_VAL, LOCATE_VAL, LOWER_VAL, MATH_VAL, NULL_CMP, SQRT_VAL, SUBSTRING_VAL, TRIM_VAL, UPPER_VAL, VAL

Constructor Summary

Sum(Val val)
Constructor.

Method Summary

protected String	getOperator() Return the name of this operator.
protected Class	getType(Class c) Return the type of this value based on the argument type.
boolean	isAggregate() Return true if this value is an aggregate.

Methods inherited from class org.apache.openjpa.jdbc.kernel.exps.UnaryOp

acceptVisit, appendTo, calculateValue, getMetaData, getNoParen, getType, getValue, groupBy, initialize, initializeValue, length, load, orderBy, select, selectColumns, setImplicitType, setMetaData

Methods inherited from class org.apache.openjpa.jdbc.kernel.exps.AbstractVal

appendIsEmpty, appendIsNotEmpty, appendIsNotNull, appendIsNull, appendSize, getId, isVariable, isXPath, toDataStoreValue

Methods inherited from class java.lang.Object

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

Constructor Detail

Sum

public Sum(Val val)

Constructor. Provide the value to operate on.

Method Detail

getType

protected Class getType(Class c)

Description copied from class: UnaryOp

Return the type of this value based on the argument type. Returns the argument type by default.

Overrides:

getType in class UnaryOp

getOperator

protected String getOperator()

Description copied from class: UnaryOp

Return the name of this operator.

Specified by:

getOperator in class UnaryOp

isAggregate

public boolean isAggregate()

Description copied from interface: Value

Return true if this value is an aggregate.

Specified by:

isAggregate in interface Value

Overrides:

isAggregate in class AbstractVal