org.apache.expreval.expr.literal
Class NullLiteral

java.lang.Object
  org.apache.expreval.expr.literal.GenericLiteral<Serializable>
      org.apache.expreval.expr.literal.NullLiteral

All Implemented Interfaces:

Serializable, GenericValue, ObjectValue

public class NullLiteral
extends GenericLiteral<Serializable>
implements ObjectValue

See Also:

Serialized Form

Field Summary

Fields inherited from interface org.apache.expreval.expr.node.GenericValue

serialVersionUID

Constructor Summary

NullLiteral()

Method Summary

String	asString()
protected Class<? extends GenericValue>	getReturnType()

Methods inherited from class org.apache.expreval.expr.literal.GenericLiteral

applyResultToAggregateValue, getFilter, getOptimizedValue, getValue, hasAColumnReference, initAggregateValue, isAColumnReference, isAConstant, isAnAggregateValue, isDefaultKeyword, reset, setExpressionContext, validateTypes

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.expreval.expr.node.ObjectValue

getValue

Methods inherited from interface org.apache.expreval.expr.node.GenericValue

applyResultToAggregateValue, getFilter, getOptimizedValue, hasAColumnReference, initAggregateValue, isAColumnReference, isAConstant, isAnAggregateValue, isDefaultKeyword, reset, setExpressionContext, validateTypes

Constructor Detail

NullLiteral

public NullLiteral()

Method Detail

getReturnType

protected Class<? extends GenericValue> getReturnType()

Specified by:

getReturnType in class GenericLiteral<Serializable>

asString

public String asString()

Specified by:

asString in interface GenericValue

Overrides:

asString in class GenericLiteral<Serializable>