Package com.gdblab.pathAlgebra.expressions

Class SelectionExpression

java.lang.Object

com.gdblab.pathAlgebra.expressions.SelectionExpression

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<SelectionExpression>

public class SelectionExpression
extends java.lang.Object
implements java.io.Serializable, java.lang.Comparable<SelectionExpression>

Selection operator: σ_condition(expression)

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
SelectionCondition	condition
static Name	CONDITION	Name of the com.gdblab.pathAlgebra.expressions.SelectionExpression.condition field.
PathExpression	expression
static Name	EXPRESSION	Name of the com.gdblab.pathAlgebra.expressions.SelectionExpression.expression field.
static Name	TYPE_	Name of the com.gdblab.pathAlgebra.expressions.SelectionExpression type.

Constructor Summary

Constructors

Constructor	Description
SelectionExpression(SelectionCondition condition, PathExpression expression)	Constructs an immutable SelectionExpression.

Method Summary

Modifier and Type	Method	Description
int	compareTo(SelectionExpression other)
boolean	equals(java.lang.Object other)
int	hashCode()
SelectionExpression	withCondition(SelectionCondition condition)	Returns a copy of this SelectionExpression with condition replaced.
SelectionExpression	withExpression(PathExpression expression)	Returns a copy of this SelectionExpression with expression replaced.

Methods inherited from class java.lang.Object

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

Field Detail

TYPE_

public static final Name TYPE_

Name of the com.gdblab.pathAlgebra.expressions.SelectionExpression type.

CONDITION

public static final Name CONDITION

Name of the com.gdblab.pathAlgebra.expressions.SelectionExpression.condition field.

EXPRESSION

public static final Name EXPRESSION

Name of the com.gdblab.pathAlgebra.expressions.SelectionExpression.expression field.

condition

public final SelectionCondition condition

expression

public final PathExpression expression

Constructor Detail

SelectionExpression

public SelectionExpression(SelectionCondition condition,
                           PathExpression expression)

Constructs an immutable SelectionExpression.

Method Detail

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

compareTo

public int compareTo(SelectionExpression other)

Specified by:

compareTo in interface java.lang.Comparable<SelectionExpression>

withCondition

public SelectionExpression withCondition(SelectionCondition condition)

Returns a copy of this SelectionExpression with condition replaced.

withExpression

public SelectionExpression withExpression(PathExpression expression)

Returns a copy of this SelectionExpression with expression replaced.