org.n52.svalbard.odata.expr

Class ComparisonExpr

java.lang.Object

org.n52.svalbard.odata.expr.BinaryExpr<FilterConstants.ComparisonOperator>

org.n52.svalbard.odata.expr.ComparisonExpr

All Implemented Interfaces:

BooleanExpr, Expr

public class ComparisonExpr
extends BinaryExpr<FilterConstants.ComparisonOperator>
implements BooleanExpr

Class to hold a comparison expression.

Constructor Summary

Constructors

Constructor and Description
ComparisonExpr(FilterConstants.ComparisonOperator operator, Expr left, Expr right) Create a new ComparisonExpr.

Method Summary

Modifier and Type	Method and Description
<T,X extends Throwable> T	accept(ExprVisitor<T,X> visitor) Accepts visitor for this expression.
Optional<ComparisonExpr>	asComparison() Get this expression as a comparison expression
boolean	isComparison() Check if this expression is a comparison expression.

Methods inherited from class org.n52.svalbard.odata.expr.BinaryExpr

asBinary, getLeft, getOperator, getRight, isBinary, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.n52.svalbard.odata.expr.BooleanExpr

asBoolean, isBoolean

Methods inherited from interface org.n52.svalbard.odata.expr.Expr

asBinary, asBooleanBinary, asBooleanUnary, asMember, asMethodCall, asUnary, asValue, isBinary, isBooleanBinary, isBooleanUnary, isMember, isMethodCall, isUnary, isValue

Constructor Detail

ComparisonExpr

public ComparisonExpr(FilterConstants.ComparisonOperator operator,
                      Expr left,
                      Expr right)

Create a new ComparisonExpr.

Parameters:

operator - the operator

left - the left operand

right - the right operand

Method Detail

isComparison

public boolean isComparison()

Description copied from interface: Expr

Check if this expression is a comparison expression.

Specified by:

isComparison in interface Expr

Returns:

if it is a comparison expression

asComparison

public Optional<ComparisonExpr> asComparison()

Description copied from interface: Expr

Get this expression as a comparison expression

Specified by:

asComparison in interface Expr

Returns:

the expression or Optional.empty() if the type does not match

accept

public <T,X extends Throwable> T accept(ExprVisitor<T,X> visitor)
                                 throws X extends Throwable

Description copied from interface: Expr

Accepts visitor for this expression.

Specified by:

accept in interface Expr

Type Parameters:

T - the visitor's return type

X - the exception type the visitor may throw

Parameters:

visitor - the visitor

Returns:

the result of the visit

Throws:

X - if the visitor fails to visit this expression

X extends Throwable