org.apache.ambari.server.api.predicate.expressions

Class NotLogicalExpression

java.lang.Object

org.apache.ambari.server.api.predicate.expressions.AbstractExpression<Expression>

org.apache.ambari.server.api.predicate.expressions.LogicalExpression

org.apache.ambari.server.api.predicate.expressions.NotLogicalExpression

All Implemented Interfaces:

Expression<Expression>

public class NotLogicalExpression
extends LogicalExpression

A 'NOT' logical expression representation. Negates a corresponding right operand.

Constructor Summary

Constructors

Constructor and Description
NotLogicalExpression(LogicalOperator op) Constructor.

Method Summary

Modifier and Type	Method and Description
List<Expression>	merge(Expression left, Expression right, int precedence) Merge expression with surrounding expressions.
Predicate	toPredicate() Get the predicate representation of the expression.

Methods inherited from class org.apache.ambari.server.api.predicate.expressions.AbstractExpression

defaultMerge, getLeftOperand, getOperator, getRightOperand, setLeftOperand, setRightOperand

Methods inherited from class java.lang.Object

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

Constructor Detail

NotLogicalExpression

public NotLogicalExpression(LogicalOperator op)

Constructor.

Parameters:

op - the logical operator

Method Detail

merge

public List<Expression> merge(Expression left,
                              Expression right,
                              int precedence)

Description copied from interface: Expression

Merge expression with surrounding expressions.

Specified by:

merge in interface Expression<Expression>

Overrides:

merge in class LogicalExpression

Parameters:

left - the preceding expression

right - the following expression

precedence - the precedence level being merged. Only expressions at this precedence level should be merged. Others should simply return the left expression, themselves and the right expression in that order.

Returns:

a list of expressions after merging. Do not return any null elements.

toPredicate

public Predicate toPredicate()
                      throws InvalidQueryException

Description copied from interface: Expression

Get the predicate representation of the expression.

Specified by:

toPredicate in interface Expression<Expression>

Overrides:

toPredicate in class LogicalExpression

Returns:

a predicate instance for the expression

Throws:

InvalidQueryException