Package org.apache.cassandra.db.filter

Class ColumnSubselection

java.lang.Object

org.apache.cassandra.db.filter.ColumnSubselection

All Implemented Interfaces:

Comparable<ColumnSubselection>

public abstract class ColumnSubselection
extends Object
implements Comparable<ColumnSubselection>

Handles the selection of a subpart of a column.

This only make sense for complex column. For those, this allow for instance to select only a slice of a map.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ColumnSubselection.Serializer

Field Summary

Fields

Modifier and Type	Field	Description
protected final ColumnMetadata	column
static final ColumnSubselection.Serializer	serializer

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ColumnSubselection(ColumnMetadata column)

Method Summary

Modifier and Type	Method	Description
ColumnMetadata	column()
abstract int	compareInclusionOf(CellPath path)	Given a path, return -1 if the path is before anything selected by this subselection, 0 if it is selected by this subselection and 1 if the path is after anything selected by this subselection.
int	compareTo(ColumnSubselection other)
protected abstract CellPath	comparisonPath()
static ColumnSubselection	element(ColumnMetadata column, CellPath elt)
protected abstract org.apache.cassandra.db.filter.ColumnSubselection.Kind	kind()
static ColumnSubselection	slice(ColumnMetadata column, CellPath from, CellPath to)
String	toString()
protected abstract String	toString(boolean cql)

Methods inherited from class java.lang.Object

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

Field Details

serializer

public static final ColumnSubselection.Serializer serializer

column

protected final ColumnMetadata column

Constructor Details

ColumnSubselection

protected ColumnSubselection(ColumnMetadata column)

Method Details

slice

public static ColumnSubselection slice(ColumnMetadata column,
 CellPath from,
 CellPath to)

element

public static ColumnSubselection element(ColumnMetadata column,
 CellPath elt)

column

public ColumnMetadata column()

kind

protected abstract org.apache.cassandra.db.filter.ColumnSubselection.Kind kind()

comparisonPath

protected abstract CellPath comparisonPath()

compareTo

public int compareTo(ColumnSubselection other)

Specified by:

compareTo in interface Comparable<ColumnSubselection>

compareInclusionOf

public abstract int compareInclusionOf(CellPath path)

Given a path, return -1 if the path is before anything selected by this subselection, 0 if it is selected by this subselection and 1 if the path is after anything selected by this subselection.

toString

public String toString()

Overrides:

toString in class Object

toString

protected abstract String toString(boolean cql)