org.apache.cassandra.cql3.restrictions

Class SingleColumnRestriction

java.lang.Object

org.apache.cassandra.cql3.restrictions.SingleColumnRestriction

All Implemented Interfaces:

Restriction

Direct Known Subclasses:

SingleColumnRestriction.Contains, SingleColumnRestriction.EQ, SingleColumnRestriction.IN, SingleColumnRestriction.Slice

public abstract class SingleColumnRestriction
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SingleColumnRestriction.Contains
static class	SingleColumnRestriction.EQ
static class	SingleColumnRestriction.IN
static class	SingleColumnRestriction.InWithMarker
static class	SingleColumnRestriction.InWithValues
static class	SingleColumnRestriction.Slice

Field Summary

Fields

Modifier and Type	Field and Description
protected ColumnDefinition	columnDef The definition of the column to which apply the restriction.

Constructor Summary

Constructors

Constructor and Description
SingleColumnRestriction(ColumnDefinition columnDef)

Method Summary

Modifier and Type	Method and Description
CompositesBuilder	appendBoundTo(CFMetaData cfm, CompositesBuilder builder, Bound bound, QueryOptions options) Appends the values of the Restriction for the specified bound to the specified builder.
protected abstract Restriction	doMergeWith(Restriction otherRestriction)
java.util.List<ColumnDefinition>	getColumnDefs() Returns the column definitions in position order.
ColumnDefinition	getFirstColumn() Returns the definition of the first column.
ColumnDefinition	getLastColumn() Returns the definition of the last column.
boolean	hasBound(Bound b) Checks if the specified bound is set or not.
boolean	hasSupportingIndex(SecondaryIndexManager indexManager) Check if the restriction is on indexed columns.
boolean	isContains()
boolean	isEQ()
boolean	isIN()
boolean	isInclusive(Bound b) Checks if the specified bound is inclusive or not.
boolean	isMultiColumn()
boolean	isNotReturningAnyRows(CFMetaData cfm, QueryOptions options) Checks if this restriction will prevent the query to return any rows.
boolean	isOnToken()
boolean	isSlice()
protected abstract boolean	isSupportedBy(SecondaryIndex index) Check if this type of restriction is supported by the specified index.
Restriction	mergeWith(Restriction otherRestriction) Merges this restriction with the specified one.
protected static Bound	reverseBoundIfNeeded(ColumnDefinition columnDefinition, Bound bound) Reverses the specified bound if the column type is a reversed one.
protected static java.nio.ByteBuffer	validateIndexedValue(ColumnSpecification columnSpec, java.nio.ByteBuffer value)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.cql3.restrictions.Restriction

addIndexExpressionTo, appendTo, getFunctions

Field Detail

columnDef

protected final ColumnDefinition columnDef

The definition of the column to which apply the restriction.

Constructor Detail

SingleColumnRestriction

public SingleColumnRestriction(ColumnDefinition columnDef)

Method Detail

getColumnDefs

public java.util.List<ColumnDefinition> getColumnDefs()

Description copied from interface: Restriction

Returns the column definitions in position order.

Returns:

the column definitions in position order.

getFirstColumn

public ColumnDefinition getFirstColumn()

Description copied from interface: Restriction

Returns the definition of the first column.

Returns:

the definition of the first column.

getLastColumn

public ColumnDefinition getLastColumn()

Description copied from interface: Restriction

Returns the definition of the last column.

Returns:

the definition of the last column.

hasSupportingIndex

public boolean hasSupportingIndex(SecondaryIndexManager indexManager)

Description copied from interface: Restriction

Check if the restriction is on indexed columns.

Parameters:

indexManager - the index manager

Returns:

true if the restriction is on indexed columns, false

mergeWith

public final Restriction mergeWith(Restriction otherRestriction)
                            throws InvalidRequestException

Description copied from interface: Restriction

Merges this restriction with the specified one.

Restriction are immutable. Therefore merging two restrictions result in a new one. The reason behind this choice is that it allow a great flexibility in the way the merging can done while preventing any side effect.

Parameters:

otherRestriction - the restriction to merge into this one

Returns:

the restriction resulting of the merge

Throws:

InvalidRequestException - if the restrictions cannot be merged

doMergeWith

protected abstract Restriction doMergeWith(Restriction otherRestriction)
                                    throws InvalidRequestException

Throws:

InvalidRequestException

isSupportedBy

protected abstract boolean isSupportedBy(SecondaryIndex index)

Check if this type of restriction is supported by the specified index.

Parameters:

index - the Secondary index

Returns:

true this type of restriction is supported by the specified index, false otherwise.

isOnToken

public boolean isOnToken()

Specified by:

isOnToken in interface Restriction

isMultiColumn

public boolean isMultiColumn()

Specified by:

isMultiColumn in interface Restriction

isSlice

public boolean isSlice()

Specified by:

isSlice in interface Restriction

isEQ

public boolean isEQ()

Specified by:

isEQ in interface Restriction

isIN

public boolean isIN()

Specified by:

isIN in interface Restriction

isContains

public boolean isContains()

Specified by:

isContains in interface Restriction

hasBound

public boolean hasBound(Bound b)

Description copied from interface: Restriction

Checks if the specified bound is set or not.

Specified by:

hasBound in interface Restriction

Parameters:

b - the bound type

Returns:

true if the specified bound is set, false otherwise

appendBoundTo

public CompositesBuilder appendBoundTo(CFMetaData cfm,
                                       CompositesBuilder builder,
                                       Bound bound,
                                       QueryOptions options)

Description copied from interface: Restriction

Appends the values of the Restriction for the specified bound to the specified builder.

Specified by:

appendBoundTo in interface Restriction

Parameters:

cfm - the table metadata

builder - the CompositesBuilder to append to.

bound - the bound

options - the query options

Returns:

the CompositesBuilder

isInclusive

public boolean isInclusive(Bound b)

Description copied from interface: Restriction

Checks if the specified bound is inclusive or not.

Specified by:

isInclusive in interface Restriction

Parameters:

b - the bound type

Returns:

true if the specified bound is inclusive, false otherwise

isNotReturningAnyRows

public boolean isNotReturningAnyRows(CFMetaData cfm,
                                     QueryOptions options)

Description copied from interface: Restriction

Checks if this restriction will prevent the query to return any rows.

Specified by:

isNotReturningAnyRows in interface Restriction

Parameters:

cfm - the table metadata

options - the query options

Returns:

true if this restriction will prevent the query to return any rows, otherwise

validateIndexedValue

protected static java.nio.ByteBuffer validateIndexedValue(ColumnSpecification columnSpec,
                                                          java.nio.ByteBuffer value)
                                                   throws InvalidRequestException

Throws:

InvalidRequestException

reverseBoundIfNeeded

protected static Bound reverseBoundIfNeeded(ColumnDefinition columnDefinition,
                                            Bound bound)

Reverses the specified bound if the column type is a reversed one.

Parameters:

columnDefinition - the column definition

bound - the bound

Returns:

the bound reversed if the column type was a reversed one or the original bound