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 |
collectCollatedColumns(ColumnFamily returnCF,
java.util.Iterator<IColumn> collatedColumns,
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)
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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()
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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)
collectCollatedColumns
public void collectCollatedColumns(ColumnFamily returnCF,
java.util.Iterator<IColumn> collatedColumns,
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 © 2011 The Apache Software Foundation