NullValue (Common Utilities 2.0.0 API)

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local.tomas.expr.eval
Class NullValue

java.lang.Object
  local.tomas.expr.eval.ExpressionValue
      local.tomas.expr.eval.NullValue

public class NullValue
extends ExpressionValue
extends ExpressionValue

The singleton NULL expression value.

Author:: tomas.teubner

Field Summary

Fields inherited from class local.tomas.expr.eval.ExpressionValue
`NULL`

Method Summary
`ExpressionValue`	`evalAbsFunction()` Evaluate abs function.
`ExpressionValue`	`evalAddition(ExpressionValue right)` Evaluate addition.
`ExpressionValue`	`evalAnd(ExpressionValue right)` Evaluate and.
`ExpressionValue`	`evalAvgFunction()` Evaluate avg function.
`ExpressionValue`	`evalConcatenation(ExpressionValue right)` Evaluate string concatenation.
`ExpressionValue`	`evalCountFunction()` Evaluate count function.
`ExpressionValue`	`evalDivision(ExpressionValue right)` Evaluate division operation.
`ExpressionValue`	`evalEquality(ExpressionValue right)` Evaluate equality comparison.
`ExpressionValue`	`evalGreaterEqual(ExpressionValue right)` Evaluate greater equal comparison.
`ExpressionValue`	`evalGreaterThan(ExpressionValue right)` Evaluate greater than comparison.
`ExpressionValue`	`evalInequality(ExpressionValue right)` Evaluate inequality comparison.
`ExpressionValue`	`evalInTerm(ExpressionValue right)` Evaluate "in" term.
`ExpressionValue`	`evalIsNotNull()` Evaluate "is not null" term.
`ExpressionValue`	`evalIsNull()` Evaluate "is null" term.
`ExpressionValue`	`evalLengthFunction()` Evaluate length function.
`ExpressionValue`	`evalLessEqual(ExpressionValue right)` Evaluate less equal comparison.
`ExpressionValue`	`evalLessThan(ExpressionValue right)` Evaluate less than comparison.
`ExpressionValue`	`evalLike(ExpressionValue right)` Evaluate like term.
`ExpressionValue`	`evalLowerFunction()` Evaluate lower function.
`ExpressionValue`	`evalMatch(ExpressionValue right)` Evaluate regular expression matching term.
`ExpressionValue`	`evalMaxFunction()` Evaluate max function.
`ExpressionValue`	`evalMinFunction()` Evaluate min function.
`ExpressionValue`	`evalMultiplication(ExpressionValue right)` Evaluate multiplication term.
`ExpressionValue`	`evalNegation()` Evaluate negation.
`ExpressionValue`	`evalNotLikeTerm(ExpressionValue right)` Evaluate not like term.
`ExpressionValue`	`evalOrTerm(ExpressionValue right)` Evaluate or term.
`ExpressionValue`	`evalReplaceFunction(ExpressionValue value, ExpressionValue value2)` Evaluate replacement function.
`ExpressionValue`	`evalSignChange()` Evaluate negation.
`ExpressionValue`	`evalSubstrFunction(ExpressionValue pos, ExpressionValue len)` Evaluate substring function.
`ExpressionValue`	`evalSubtraction(ExpressionValue right)` Evaluate subtraction term.
`ExpressionValue`	`evalSumFunction()` Evaluate sum function.
`ExpressionValue`	`evalTrimFunction()` Evaluate trim function.
`ExpressionValue`	`evalUpperFunction()` Evaluate upper function.
`static NullValue`	`getInstance()` Get singleton instance.
`Object`	`getObjectValue()` Return the Java object representing this expression value.
`ExpressionType`	`getType()` Get the type of this expression value.
`String`	`toString()`

Methods inherited from class local.tomas.expr.eval.ExpressionValue
`create`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Method Detail

getInstance

public static NullValue getInstance()

Get singleton instance.

Returns: