org.apache.cassandra.db.filter
Class QueryFilter
java.lang.Object
org.apache.cassandra.db.filter.QueryFilter
public class QueryFilter
- extends java.lang.Object
Method Summary |
void |
collateColumns(ColumnFamily returnCF,
java.util.List<? extends CloseableIterator<IColumn>> toCollate,
AbstractType comparator,
int gcBefore)
|
java.lang.String |
getColumnFamilyName()
|
static IFilter |
getFilter(SlicePredicate predicate,
AbstractType comparator)
|
static QueryFilter |
getIdentityFilter(DecoratedKey<?> key,
QueryPath path)
return a QueryFilter object that includes every column in the row. |
IColumnIterator |
getMemtableColumnIterator(ColumnFamily cf,
DecoratedKey<?> key,
AbstractType comparator)
|
IColumnIterator |
getMemtableColumnIterator(Memtable memtable,
AbstractType comparator)
|
static QueryFilter |
getNamesFilter(DecoratedKey<?> key,
QueryPath path,
java.nio.ByteBuffer column)
convenience method for creating a name filter matching a single column |
static QueryFilter |
getNamesFilter(DecoratedKey<?> key,
QueryPath path,
java.util.SortedSet<java.nio.ByteBuffer> columns)
|
static QueryFilter |
getSliceFilter(DecoratedKey<?> key,
QueryPath path,
java.nio.ByteBuffer start,
java.nio.ByteBuffer finish,
boolean reversed,
int limit)
|
IColumnIterator |
getSSTableColumnIterator(SSTableReader sstable)
|
IColumnIterator |
getSSTableColumnIterator(SSTableReader sstable,
FileDataInput file,
DecoratedKey<?> key)
|
static boolean |
isRelevant(IColumn column,
IColumnContainer container,
int gcBefore)
|
java.lang.String |
toString()
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
key
public final DecoratedKey<?> key
path
public final QueryPath path
filter
public final IFilter filter
QueryFilter
public QueryFilter(DecoratedKey<?> key,
QueryPath path,
IFilter filter)
getMemtableColumnIterator
public IColumnIterator getMemtableColumnIterator(Memtable memtable,
AbstractType comparator)
getMemtableColumnIterator
public IColumnIterator getMemtableColumnIterator(ColumnFamily cf,
DecoratedKey<?> key,
AbstractType comparator)
getSSTableColumnIterator
public IColumnIterator getSSTableColumnIterator(SSTableReader sstable)
getSSTableColumnIterator
public IColumnIterator getSSTableColumnIterator(SSTableReader sstable,
FileDataInput file,
DecoratedKey<?> key)
collateColumns
public void collateColumns(ColumnFamily returnCF,
java.util.List<? extends CloseableIterator<IColumn>> toCollate,
AbstractType comparator,
int gcBefore)
getColumnFamilyName
public java.lang.String getColumnFamilyName()
isRelevant
public static boolean isRelevant(IColumn column,
IColumnContainer container,
int gcBefore)
getSliceFilter
public static QueryFilter getSliceFilter(DecoratedKey<?> key,
QueryPath path,
java.nio.ByteBuffer start,
java.nio.ByteBuffer finish,
boolean reversed,
int limit)
- Parameters:
path
- path to the level to slice at (CF or SuperColumn)start
- column to start slice at, inclusive; empty for "the first column"finish
- column to stop slice at, inclusive; empty for "the last column"reversed
- true to start with the largest column (as determined by configured sort order) instead of smallestlimit
- maximum number of non-deleted columns to return
- Returns:
- a QueryFilter object to satisfy the given slice criteria: @param key the row to slice
getIdentityFilter
public static QueryFilter getIdentityFilter(DecoratedKey<?> key,
QueryPath path)
- return a QueryFilter object that includes every column in the row.
This is dangerous on large rows; avoid except for test code.
getNamesFilter
public static QueryFilter getNamesFilter(DecoratedKey<?> key,
QueryPath path,
java.util.SortedSet<java.nio.ByteBuffer> columns)
- Parameters:
key
- the row to slicepath
- path to the level to slice at (CF or SuperColumn)columns
- the column names to restrict the results to
- Returns:
- a QueryFilter object that will return columns matching the given names
getFilter
public static IFilter getFilter(SlicePredicate predicate,
AbstractType comparator)
getNamesFilter
public static QueryFilter getNamesFilter(DecoratedKey<?> key,
QueryPath path,
java.nio.ByteBuffer column)
- convenience method for creating a name filter matching a single column
toString
public java.lang.String toString()
- Overrides:
toString
in class java.lang.Object
Copyright © 2012 The Apache Software Foundation