Package org.apache.cassandra.cql3

Class SingleColumnRelation

java.lang.Object

org.apache.cassandra.cql3.Relation

org.apache.cassandra.cql3.SingleColumnRelation

public final class SingleColumnRelation
extends Relation

Relations encapsulate the relationship between an entity of some kind, and a value (term). For example, <key> > "start" or "colname1" = "somevalue".

Field Summary

Fields inherited from class org.apache.cassandra.cql3.Relation

relationType

Constructor Summary

Constructors

Constructor	Description
SingleColumnRelation(ColumnIdentifier entity, Operator type, Term.Raw value)	Creates a new relation.
SingleColumnRelation(ColumnIdentifier entity, Term.Raw mapKey, Operator type, Term.Raw value)	Creates a new relation.

Method Summary

Modifier and Type	Method	Description
static SingleColumnRelation	createInRelation(ColumnIdentifier entity, List<Term.Raw> inValues)
boolean	equals(Object o)
ColumnIdentifier	getEntity()
List<? extends Term.Raw>	getInValues()	Returns the list of raw IN values for this relation, or null if this is not an IN relation.
Term.Raw	getMapKey()
Term.Raw	getValue()	Returns the raw value for this relation, or null if this is an IN relation.
int	hashCode()
protected Restriction	newContainsRestriction(TableMetadata table, VariableSpecifications boundNames, boolean isKey)	Creates a new Contains restriction instance.
protected Restriction	newEQRestriction(TableMetadata table, VariableSpecifications boundNames)	Creates a new EQ restriction instance.
protected Restriction	newINRestriction(TableMetadata table, VariableSpecifications boundNames)	Creates a new IN restriction instance.
protected Restriction	newIsNotRestriction(TableMetadata table, VariableSpecifications boundNames)
protected Restriction	newLikeRestriction(TableMetadata table, VariableSpecifications boundNames, Operator operator)
protected Restriction	newSliceRestriction(TableMetadata table, VariableSpecifications boundNames, Bound bound, boolean inclusive)	Creates a new Slice restriction instance.
Relation	renameIdentifier(ColumnIdentifier from, ColumnIdentifier to)	Renames an identifier in this Relation, if applicable.
String	toCQLString()	Returns a CQL representation of this relation.
protected Term	toTerm(List<? extends ColumnSpecification> receivers, Term.Raw raw, String keyspace, VariableSpecifications boundNames)	Converts the specified Raw into a Term.
SingleColumnRelation	withNonStrictOperator()

Methods inherited from class org.apache.cassandra.cql3.Relation

isContains, isContainsKey, isEQ, isIN, isLIKE, isMultiColumn, isSlice, onToken, operator, toRestriction, toString, toTerms

Methods inherited from class java.lang.Object

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

Constructor Details

SingleColumnRelation

public SingleColumnRelation(ColumnIdentifier entity,
 Term.Raw mapKey,
 Operator type,
 Term.Raw value)

Creates a new relation.

Parameters:

entity - the kind of relation this is; what the term is being compared to.

mapKey - the key into the entity identifying the value the term is being compared to.

type - the type that describes how this entity relates to the value.

value - the value being compared.

SingleColumnRelation

public SingleColumnRelation(ColumnIdentifier entity,
 Operator type,
 Term.Raw value)

Creates a new relation.

Parameters:

entity - the kind of relation this is; what the term is being compared to.

type - the type that describes how this entity relates to the value.

value - the value being compared.

Method Details

getValue

public Term.Raw getValue()

Description copied from class: Relation

Returns the raw value for this relation, or null if this is an IN relation.

Specified by:

getValue in class Relation

getInValues

public List<? extends Term.Raw> getInValues()

Description copied from class: Relation

Returns the list of raw IN values for this relation, or null if this is not an IN relation.

Specified by:

getInValues in class Relation

createInRelation

public static SingleColumnRelation createInRelation(ColumnIdentifier entity,
 List<Term.Raw> inValues)

getEntity

public ColumnIdentifier getEntity()

getMapKey

public Term.Raw getMapKey()

toTerm

protected Term toTerm(List<? extends ColumnSpecification> receivers,
 Term.Raw raw,
 String keyspace,
 VariableSpecifications boundNames)
               throws InvalidRequestException

Description copied from class: Relation

Converts the specified Raw into a Term.

Specified by:

toTerm in class Relation

Parameters:

receivers - the columns to which the values must be associated at

raw - the raw term to convert

keyspace - the keyspace name

boundNames - the variables specification where to collect the bind variables

Returns:

the Term corresponding to the specified Raw

Throws:

InvalidRequestException - if the Raw term is not valid

withNonStrictOperator

public SingleColumnRelation withNonStrictOperator()

renameIdentifier

public Relation renameIdentifier(ColumnIdentifier from,
 ColumnIdentifier to)

Description copied from class: Relation

Renames an identifier in this Relation, if applicable.

Specified by:

renameIdentifier in class Relation

Parameters:

from - the old identifier

to - the new identifier

Returns:

this object, if the old identifier is not in the set of entities that this relation covers; otherwise a new Relation with "from" replaced by "to" is returned.

toCQLString

public String toCQLString()

Description copied from class: Relation

Returns a CQL representation of this relation.

Specified by:

toCQLString in class Relation

Returns:

a CQL representation of this relation

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

newEQRestriction

protected Restriction newEQRestriction(TableMetadata table,
 VariableSpecifications boundNames)

Description copied from class: Relation

Creates a new EQ restriction instance.

Specified by:

newEQRestriction in class Relation

Parameters:

table - the table meta data

boundNames - the variables specification where to collect the bind variables

Returns:

a new EQ restriction instance.

newINRestriction

protected Restriction newINRestriction(TableMetadata table,
 VariableSpecifications boundNames)

Description copied from class: Relation

Creates a new IN restriction instance.

Specified by:

newINRestriction in class Relation

Parameters:

table - the table meta data

boundNames - the variables specification where to collect the bind variables

Returns:

a new IN restriction instance

newSliceRestriction

protected Restriction newSliceRestriction(TableMetadata table,
 VariableSpecifications boundNames,
 Bound bound,
 boolean inclusive)

Description copied from class: Relation

Creates a new Slice restriction instance.

Specified by:

newSliceRestriction in class Relation

Parameters:

table - the table meta data

boundNames - the variables specification where to collect the bind variables

bound - the slice bound

inclusive - true if the bound is included.

Returns:

a new slice restriction instance

newContainsRestriction

protected Restriction newContainsRestriction(TableMetadata table,
 VariableSpecifications boundNames,
 boolean isKey)
                                      throws InvalidRequestException

Description copied from class: Relation

Creates a new Contains restriction instance.

Specified by:

newContainsRestriction in class Relation

Parameters:

table - the table meta data

boundNames - the variables specification where to collect the bind variables

isKey - true if the restriction to create is a CONTAINS KEY

Returns:

a new Contains Restriction instance

Throws:

InvalidRequestException - if the Relation is not valid

newIsNotRestriction

protected Restriction newIsNotRestriction(TableMetadata table,
 VariableSpecifications boundNames)
                                   throws InvalidRequestException

Specified by:

newIsNotRestriction in class Relation

Throws:

InvalidRequestException

newLikeRestriction

protected Restriction newLikeRestriction(TableMetadata table,
 VariableSpecifications boundNames,
 Operator operator)

Specified by:

newLikeRestriction in class Relation