Package com.gdblab.pathAlgebra.expressions

Class ProjectionExpression

java.lang.Object

com.gdblab.pathAlgebra.expressions.ProjectionExpression

All Implemented Interfaces:

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

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

Projection operator: π_(#P,#G,#A)(solutionSpace)

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
SolutionSpaceExpression	expression
static Name	EXPRESSION	Name of the com.gdblab.pathAlgebra.expressions.ProjectionExpression.expression field.
ProjectionSpec	groups
static Name	GROUPS	Name of the com.gdblab.pathAlgebra.expressions.ProjectionExpression.groups field.
ProjectionSpec	partitions
static Name	PARTITIONS	Name of the com.gdblab.pathAlgebra.expressions.ProjectionExpression.partitions field.
ProjectionSpec	paths
static Name	PATHS	Name of the com.gdblab.pathAlgebra.expressions.ProjectionExpression.paths field.
static Name	TYPE_	Name of the com.gdblab.pathAlgebra.expressions.ProjectionExpression type.

Constructor Summary

Constructors

Constructor	Description
ProjectionExpression(ProjectionSpec partitions, ProjectionSpec groups, ProjectionSpec paths, SolutionSpaceExpression expression)	Constructs an immutable ProjectionExpression.

Method Summary

Modifier and Type	Method	Description
int	compareTo(ProjectionExpression other)
boolean	equals(java.lang.Object other)
int	hashCode()
ProjectionExpression	withExpression(SolutionSpaceExpression expression)	Returns a copy of this ProjectionExpression with expression replaced.
ProjectionExpression	withGroups(ProjectionSpec groups)	Returns a copy of this ProjectionExpression with groups replaced.
ProjectionExpression	withPartitions(ProjectionSpec partitions)	Returns a copy of this ProjectionExpression with partitions replaced.
ProjectionExpression	withPaths(ProjectionSpec paths)	Returns a copy of this ProjectionExpression with paths 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.ProjectionExpression type.

PARTITIONS

public static final Name PARTITIONS

Name of the com.gdblab.pathAlgebra.expressions.ProjectionExpression.partitions field.

GROUPS

public static final Name GROUPS

Name of the com.gdblab.pathAlgebra.expressions.ProjectionExpression.groups field.

PATHS

public static final Name PATHS

Name of the com.gdblab.pathAlgebra.expressions.ProjectionExpression.paths field.

EXPRESSION

public static final Name EXPRESSION

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

partitions

public final ProjectionSpec partitions

groups

public final ProjectionSpec groups

paths

public final ProjectionSpec paths

expression

public final SolutionSpaceExpression expression

Constructor Detail

ProjectionExpression

public ProjectionExpression(ProjectionSpec partitions,
                            ProjectionSpec groups,
                            ProjectionSpec paths,
                            SolutionSpaceExpression expression)

Constructs an immutable ProjectionExpression.

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(ProjectionExpression other)

Specified by:

compareTo in interface java.lang.Comparable<ProjectionExpression>

withPartitions

public ProjectionExpression withPartitions(ProjectionSpec partitions)

Returns a copy of this ProjectionExpression with partitions replaced.

withGroups

public ProjectionExpression withGroups(ProjectionSpec groups)

Returns a copy of this ProjectionExpression with groups replaced.

withPaths

public ProjectionExpression withPaths(ProjectionSpec paths)

Returns a copy of this ProjectionExpression with paths replaced.

withExpression

public ProjectionExpression withExpression(SolutionSpaceExpression expression)

Returns a copy of this ProjectionExpression with expression replaced.