Package hydra.query

Class Query

java.lang.Object

hydra.query.Query

All Implemented Interfaces:

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

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

A SELECT-style graph pattern matching query

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
java.util.List<Pattern>	patterns	The patterns to be matched
static Name	PATTERNS	Name of the hydra.query.Query.patterns field.
static Name	TYPE_	Name of the hydra.query.Query type.
java.util.List<Variable>	variables	The variables selected by the query
static Name	VARIABLES	Name of the hydra.query.Query.variables field.

Constructor Summary

Constructors

Constructor	Description
Query(java.util.List<Variable> variables, java.util.List<Pattern> patterns)	Constructs an immutable Query.

Method Summary

Modifier and Type	Method	Description
int	compareTo(Query other)
boolean	equals(java.lang.Object other)
int	hashCode()
Query	withPatterns(java.util.List<Pattern> patterns)	Returns a copy of this Query with patterns replaced.
Query	withVariables(java.util.List<Variable> variables)	Returns a copy of this Query with variables 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 hydra.query.Query type.

VARIABLES

public static final Name VARIABLES

Name of the hydra.query.Query.variables field.

PATTERNS

public static final Name PATTERNS

Name of the hydra.query.Query.patterns field.

variables

public final java.util.List<Variable> variables

The variables selected by the query

patterns

public final java.util.List<Pattern> patterns

The patterns to be matched

Constructor Detail

Query

public Query(java.util.List<Variable> variables,
             java.util.List<Pattern> patterns)

Constructs an immutable Query.

Parameters:

variables - The variables selected by the query

patterns - The patterns to be matched

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(Query other)

Specified by:

compareTo in interface java.lang.Comparable<Query>

withVariables

public Query withVariables(java.util.List<Variable> variables)

Returns a copy of this Query with variables replaced.

withPatterns

public Query withPatterns(java.util.List<Pattern> patterns)

Returns a copy of this Query with patterns replaced.