Package it.unimi.di.big.mg4j.query.nodes

Class Difference

java.lang.Object

it.unimi.di.big.mg4j.query.nodes.Difference

All Implemented Interfaces:

Query, Serializable

public class Difference
extends Object
implements Query

A node representing a difference of two queries.

Author:

Sebastiano Vigna

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
int	leftMargin	A margin that will be added to the left of each interval of the subtrahend.
Query	minuend	The minuend query.
int	rightMargin	A margin that will be added to the right of each interval of the subtrahend.
Query	subtrahend	The subtrahend query.

Constructor Summary

Constructors

Constructor	Description
Difference(Query minuend, Query subtrahend)
Difference(Query minuend, Query subtrahend, int leftMargin, int rightMargin)

Method Summary

Modifier and Type	Method	Description
<T> T	accept(QueryBuilderVisitor<T> visitor)	Accepts a visitor.
boolean	equals(Object o)
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

minuend

public final Query minuend

The minuend query.

subtrahend

public final Query subtrahend

The subtrahend query.

leftMargin

public final int leftMargin

A margin that will be added to the left of each interval of the subtrahend.

rightMargin

public final int rightMargin

A margin that will be added to the right of each interval of the subtrahend.

Constructor Detail

Difference

public Difference(Query minuend,
                  Query subtrahend)

Difference

public Difference(Query minuend,
                  Query subtrahend,
                  int leftMargin,
                  int rightMargin)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

accept

public <T> T accept(QueryBuilderVisitor<T> visitor)
             throws QueryBuilderVisitorException

Description copied from interface: Query

Accepts a visitor.

Specified by:

accept in interface Query

Parameters:

visitor - the visitor.

Returns:

the result of the visit, or null if the visit should stop.

Throws:

QueryBuilderVisitorException

See Also:

Query

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object