Class ProjectionExpression
- java.lang.Object
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- com.gdblab.pathAlgebra.expressions.ProjectionExpression
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- 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
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Field Summary
Fields Modifier and Type Field Description SolutionSpaceExpressionexpressionstatic NameEXPRESSIONName of thecom.gdblab.pathAlgebra.expressions.ProjectionExpression.expressionfield.ProjectionSpecgroupsstatic NameGROUPSName of thecom.gdblab.pathAlgebra.expressions.ProjectionExpression.groupsfield.ProjectionSpecpartitionsstatic NamePARTITIONSName of thecom.gdblab.pathAlgebra.expressions.ProjectionExpression.partitionsfield.ProjectionSpecpathsstatic NamePATHSName of thecom.gdblab.pathAlgebra.expressions.ProjectionExpression.pathsfield.static NameTYPE_Name of thecom.gdblab.pathAlgebra.expressions.ProjectionExpressiontype.
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Constructor Summary
Constructors Constructor Description ProjectionExpression(ProjectionSpec partitions, ProjectionSpec groups, ProjectionSpec paths, SolutionSpaceExpression expression)Constructs an immutableProjectionExpression.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description intcompareTo(ProjectionExpression other)booleanequals(java.lang.Object other)inthashCode()ProjectionExpressionwithExpression(SolutionSpaceExpression expression)Returns a copy of thisProjectionExpressionwithexpressionreplaced.ProjectionExpressionwithGroups(ProjectionSpec groups)Returns a copy of thisProjectionExpressionwithgroupsreplaced.ProjectionExpressionwithPartitions(ProjectionSpec partitions)Returns a copy of thisProjectionExpressionwithpartitionsreplaced.ProjectionExpressionwithPaths(ProjectionSpec paths)Returns a copy of thisProjectionExpressionwithpathsreplaced.
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Field Detail
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TYPE_
public static final Name TYPE_
Name of thecom.gdblab.pathAlgebra.expressions.ProjectionExpressiontype.
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PARTITIONS
public static final Name PARTITIONS
Name of thecom.gdblab.pathAlgebra.expressions.ProjectionExpression.partitionsfield.
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GROUPS
public static final Name GROUPS
Name of thecom.gdblab.pathAlgebra.expressions.ProjectionExpression.groupsfield.
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PATHS
public static final Name PATHS
Name of thecom.gdblab.pathAlgebra.expressions.ProjectionExpression.pathsfield.
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EXPRESSION
public static final Name EXPRESSION
Name of thecom.gdblab.pathAlgebra.expressions.ProjectionExpression.expressionfield.
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partitions
public final ProjectionSpec partitions
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groups
public final ProjectionSpec groups
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paths
public final ProjectionSpec paths
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expression
public final SolutionSpaceExpression expression
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Constructor Detail
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ProjectionExpression
public ProjectionExpression(ProjectionSpec partitions, ProjectionSpec groups, ProjectionSpec paths, SolutionSpaceExpression expression)
Constructs an immutableProjectionExpression.
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Method Detail
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equals
public boolean equals(java.lang.Object other)
- Overrides:
equalsin classjava.lang.Object
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hashCode
public int hashCode()
- Overrides:
hashCodein classjava.lang.Object
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compareTo
public int compareTo(ProjectionExpression other)
- Specified by:
compareToin interfacejava.lang.Comparable<ProjectionExpression>
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withPartitions
public ProjectionExpression withPartitions(ProjectionSpec partitions)
Returns a copy of thisProjectionExpressionwithpartitionsreplaced.
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withGroups
public ProjectionExpression withGroups(ProjectionSpec groups)
Returns a copy of thisProjectionExpressionwithgroupsreplaced.
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withPaths
public ProjectionExpression withPaths(ProjectionSpec paths)
Returns a copy of thisProjectionExpressionwithpathsreplaced.
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withExpression
public ProjectionExpression withExpression(SolutionSpaceExpression expression)
Returns a copy of thisProjectionExpressionwithexpressionreplaced.
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