Package org.apache.cassandra.cql3.restrictions

Class SingleColumnRestriction

java.lang.Object

org.apache.cassandra.cql3.restrictions.SingleColumnRestriction

All Implemented Interfaces:

Restriction, SingleRestriction

Direct Known Subclasses:

SingleColumnRestriction.ContainsRestriction, SingleColumnRestriction.EQRestriction, SingleColumnRestriction.INRestriction, SingleColumnRestriction.IsNotNullRestriction, SingleColumnRestriction.LikeRestriction, SingleColumnRestriction.SliceRestriction

public abstract class SingleColumnRestriction
extends java.lang.Object
implements SingleRestriction

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SingleColumnRestriction.ContainsRestriction
static class	SingleColumnRestriction.EQRestriction
static class	SingleColumnRestriction.INRestriction
static class	SingleColumnRestriction.InRestrictionWithMarker
static class	SingleColumnRestriction.InRestrictionWithValues
static class	SingleColumnRestriction.IsNotNullRestriction
static class	SingleColumnRestriction.LikeRestriction
static class	SingleColumnRestriction.SliceRestriction

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor	Description
SingleColumnRestriction(ColumnMetadata columnDef)

Method Summary

Modifier and Type	Method	Description
protected abstract SingleRestriction	doMergeWith(SingleRestriction otherRestriction)
java.util.List<ColumnMetadata>	getColumnDefs()	Returns the column definitions in position order.
ColumnMetadata	getFirstColumn()	Returns the definition of the first column.
ColumnMetadata	getLastColumn()	Returns the definition of the last column.
boolean	hasSupportingIndex(IndexRegistry indexRegistry)	Check if the restriction is on indexed columns.
protected abstract boolean	isSupportedBy(Index index)	Check if this type of restriction is supported by the specified index.
SingleRestriction	mergeWith(SingleRestriction otherRestriction)	Merges this restriction with the specified one.
boolean	needsFiltering(Index.Group indexGroup)	Returns whether this restriction would need filtering if the specified index group were used.

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

addFunctionsTo, addToRowFilter, isOnToken

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

appendBoundTo, appendTo, hasBound, isContains, isEQ, isEqualityBased, isIN, isInclusive, isLIKE, isMultiColumn, isNotNull, isSlice

Field Detail

columnDef

protected final ColumnMetadata columnDef

The definition of the column to which apply the restriction.

Constructor Detail

SingleColumnRestriction

public SingleColumnRestriction(ColumnMetadata columnDef)

Method Detail

getColumnDefs

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

Description copied from interface: Restriction

Returns the column definitions in position order.

Specified by:

getColumnDefs in interface Restriction

Returns:

the column definitions in position order.

getFirstColumn

public ColumnMetadata getFirstColumn()

Description copied from interface: Restriction

Returns the definition of the first column.

Specified by:

getFirstColumn in interface Restriction

Returns:

the definition of the first column.

getLastColumn

public ColumnMetadata getLastColumn()

Description copied from interface: Restriction

Returns the definition of the last column.

Specified by:

getLastColumn in interface Restriction

Returns:

the definition of the last column.

hasSupportingIndex

public boolean hasSupportingIndex(IndexRegistry indexRegistry)

Description copied from interface: Restriction

Check if the restriction is on indexed columns.

Specified by:

hasSupportingIndex in interface Restriction

Parameters:

indexRegistry - the index registry

Returns:

true if the restriction is on indexed columns, false

needsFiltering

public boolean needsFiltering(Index.Group indexGroup)

Description copied from interface: Restriction

Returns whether this restriction would need filtering if the specified index group were used.

Specified by:

needsFiltering in interface Restriction

Parameters:

indexGroup - an index group

Returns:

true if this would need filtering if indexGroup were used, false otherwise

mergeWith

public final SingleRestriction mergeWith(SingleRestriction otherRestriction)

Description copied from interface: SingleRestriction

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.

Specified by:

mergeWith in interface SingleRestriction

Parameters:

otherRestriction - the restriction to merge into this one

Returns:

the restriction resulting of the merge

doMergeWith

protected abstract SingleRestriction doMergeWith(SingleRestriction otherRestriction)

isSupportedBy

protected abstract boolean isSupportedBy(Index 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.