Package org.apache.cassandra.cql3.restrictions

Class MultiColumnRestriction

java.lang.Object

org.apache.cassandra.cql3.restrictions.MultiColumnRestriction

All Implemented Interfaces:

Restriction, SingleRestriction

Direct Known Subclasses:

MultiColumnRestriction.EQRestriction, MultiColumnRestriction.INRestriction, MultiColumnRestriction.NotNullRestriction, MultiColumnRestriction.SliceRestriction

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

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	MultiColumnRestriction.EQRestriction
static class	MultiColumnRestriction.INRestriction
static class	MultiColumnRestriction.InRestrictionWithMarker	An IN restriction that uses a single marker for a set of IN values that are tuples.
static class	MultiColumnRestriction.InRestrictionWithValues	An IN restriction that has a set of terms for in values.
static class	MultiColumnRestriction.NotNullRestriction
static class	MultiColumnRestriction.SliceRestriction

Field Summary

Fields

Modifier and Type	Field	Description
protected java.util.List<ColumnMetadata>	columnDefs	The columns to which the restriction apply.

Constructor Summary

Constructors

Constructor	Description
MultiColumnRestriction(java.util.List<ColumnMetadata> columnDefs)

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.
protected java.lang.String	getColumnsInCommons(Restriction otherRestriction)	Returns the names of the columns that are specified within this Restrictions and the other one as a comma separated String.
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.
boolean	isMultiColumn()
protected abstract boolean	isSupportedBy(Index index, ColumnMetadata def)
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.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, 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, isNotNull, isSlice

Field Detail

columnDefs

protected final java.util.List<ColumnMetadata> columnDefs

The columns to which the restriction apply.

Constructor Detail

MultiColumnRestriction

public MultiColumnRestriction(java.util.List<ColumnMetadata> columnDefs)

Method Detail

isMultiColumn

public boolean isMultiColumn()

Specified by:

isMultiColumn in interface SingleRestriction

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.

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.

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)

getColumnsInCommons

protected final java.lang.String getColumnsInCommons(Restriction otherRestriction)

Returns the names of the columns that are specified within this Restrictions and the other one as a comma separated String.

Parameters:

otherRestriction - the other restrictions

Returns:

the names of the columns that are specified within this Restrictions and the other one as a comma separated String.

hasSupportingIndex

public final 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

isSupportedBy

protected abstract boolean isSupportedBy(Index index,
                                         ColumnMetadata def)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object