Package org.apache.cassandra.cql3.selection

Class Selection

java.lang.Object

org.apache.cassandra.cql3.selection.Selection

public abstract class Selection
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	Selection.Selectors

Field Summary

Fields

Modifier and Type	Field	Description
protected org.apache.cassandra.cql3.selection.ColumnFilterFactory	columnFilterFactory
protected boolean	isJson
protected ResultSet.ResultMetadata	metadata
protected java.util.List<ColumnMetadata>	orderingColumns

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Selection(TableMetadata table, java.util.List<ColumnMetadata> selectedColumns, java.util.Set<ColumnMetadata> orderingColumns, SelectionColumnMapping columnMapping, org.apache.cassandra.cql3.selection.ColumnFilterFactory columnFilterFactory, boolean isJson)

Method Summary

Modifier and Type	Method	Description
void	addFunctionsTo(java.util.List<Function> functions)
boolean	containsStaticColumns()	Checks if this selection contains static columns.
static Selection	forColumns(TableMetadata table, java.util.List<ColumnMetadata> columns, boolean returnStaticContentOnPartitionWithNoRows)
static Selection	fromSelectors(TableMetadata table, java.util.List<Selectable> selectables, VariableSpecifications boundNames, java.util.Set<ColumnMetadata> orderingColumns, java.util.Set<ColumnMetadata> nonPKRestrictedColumns, boolean hasGroupBy, boolean isJson, boolean returnStaticContentOnPartitionWithNoRows)
protected int	getColumnIndex(ColumnMetadata c)	Returns the index of the specified column
SelectionColumns	getColumnMapping()
java.util.List<ColumnMetadata>	getColumns()
java.lang.Integer	getOrderingIndex(ColumnMetadata c)	Returns the corresponding column index used for post query ordering
ResultSet.ResultMetadata	getResultMetadata()
int	getResultSetIndex(ColumnMetadata c)	Returns the index of the specified column within the resultset
abstract boolean	isAggregate()
boolean	isWildcard()
abstract Selection.Selectors	newSelectors(QueryOptions options)
java.lang.String	toString()
static Selection	wildcard(TableMetadata table, boolean isJson, boolean returnStaticContentOnPartitionWithNoRows)
static Selection	wildcardWithGroupByOrMaskedColumns(TableMetadata table, VariableSpecifications boundNames, java.util.Set<ColumnMetadata> orderingColumns, boolean isJson, boolean returnStaticContentOnPartitionWithNoRows)

Methods inherited from class java.lang.Object

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

Field Detail

metadata

protected final ResultSet.ResultMetadata metadata

columnFilterFactory

protected final org.apache.cassandra.cql3.selection.ColumnFilterFactory columnFilterFactory

isJson

protected final boolean isJson

orderingColumns

protected final java.util.List<ColumnMetadata> orderingColumns

Constructor Detail

Selection

protected Selection(TableMetadata table,
                    java.util.List<ColumnMetadata> selectedColumns,
                    java.util.Set<ColumnMetadata> orderingColumns,
                    SelectionColumnMapping columnMapping,
                    org.apache.cassandra.cql3.selection.ColumnFilterFactory columnFilterFactory,
                    boolean isJson)

Method Detail

isWildcard

public boolean isWildcard()

containsStaticColumns

public boolean containsStaticColumns()

Checks if this selection contains static columns.

Returns:

true if this selection contains static columns, false otherwise;

getOrderingIndex

public java.lang.Integer getOrderingIndex(ColumnMetadata c)

Returns the corresponding column index used for post query ordering

Parameters:

c - ordering column

Returns:

getResultMetadata

public ResultSet.ResultMetadata getResultMetadata()

wildcard

public static Selection wildcard(TableMetadata table,
                                 boolean isJson,
                                 boolean returnStaticContentOnPartitionWithNoRows)

wildcardWithGroupByOrMaskedColumns

public static Selection wildcardWithGroupByOrMaskedColumns(TableMetadata table,
                                                           VariableSpecifications boundNames,
                                                           java.util.Set<ColumnMetadata> orderingColumns,
                                                           boolean isJson,
                                                           boolean returnStaticContentOnPartitionWithNoRows)

forColumns

public static Selection forColumns(TableMetadata table,
                                   java.util.List<ColumnMetadata> columns,
                                   boolean returnStaticContentOnPartitionWithNoRows)

addFunctionsTo

public void addFunctionsTo(java.util.List<Function> functions)

fromSelectors

public static Selection fromSelectors(TableMetadata table,
                                      java.util.List<Selectable> selectables,
                                      VariableSpecifications boundNames,
                                      java.util.Set<ColumnMetadata> orderingColumns,
                                      java.util.Set<ColumnMetadata> nonPKRestrictedColumns,
                                      boolean hasGroupBy,
                                      boolean isJson,
                                      boolean returnStaticContentOnPartitionWithNoRows)

getResultSetIndex

public int getResultSetIndex(ColumnMetadata c)

Returns the index of the specified column within the resultset

Parameters:

c - the column

Returns:

the index of the specified column within the resultset or -1

getColumnIndex

protected final int getColumnIndex(ColumnMetadata c)

Returns the index of the specified column

Parameters:

c - the column

Returns:

the index of the specified column or -1

newSelectors

public abstract Selection.Selectors newSelectors(QueryOptions options)

getColumns

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

Returns:

the list of CQL3 columns value this SelectionClause needs.

getColumnMapping

public SelectionColumns getColumnMapping()

Returns:

the mappings between resultset columns and the underlying columns

isAggregate

public abstract boolean isAggregate()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object