ru.biosoft.access
Interface QuerySystem

All Superinterfaces:

DataCollectionListener, java.util.EventListener

All Known Implementing Classes:

DefaultQuerySystem

public interface QuerySystem

extends DataCollectionListener

... Conventions:

• QuerySystem should has public constructor with DataCollection argument This constructor is used by DataCollectioInfo to create QuerySystem.

Example:

public class SequenceQuerySystem implements QuerySystem
   {
       public SequenceQuerySystem(DataCollection dc)
       {
           ...
       }
       ...
   }
   

   
All index files used by QuerySystem are registered by DataCollectionInfo.
   Latter this information is used to correctly remove all data collection files.
   

   
close all indexes when QuerySystem is closed or finalised.
 

Field Summary

static java.lang.String	INDEX_BLOCK_SIZE
static java.lang.String	INDEX_LIST List of index names delimited by semicolon.
static java.lang.String	QUERY_SYSTEM_CLASS

Method Summary

void	close() Closes all indexes and releases any system resources associated with them stream.
Index	getIndex(java.lang.String name)
Index[]	getIndexes()

Methods inherited from interface ru.biosoft.access.DataCollectionListener

elementAdded, elementChanged, elementRemoved, elementWillAdd, elementWillChange, elementWillRemove

Field Detail

QUERY_SYSTEM_CLASS

public static final java.lang.String QUERY_SYSTEM_CLASS

See Also:

Constant Field Values

INDEX_BLOCK_SIZE

public static final java.lang.String INDEX_BLOCK_SIZE

See Also:

Constant Field Values

INDEX_LIST

public static final java.lang.String INDEX_LIST

List of index names delimited by semicolon.

See Also:

Constant Field Values

Method Detail

getIndexes

public Index[] getIndexes()

Returns:

all indexes supported by this QuerySystem.

getIndex

public Index getIndex(java.lang.String name)

Returns:

index by its name

close

public void close()

Closes all indexes and releases any system resources associated with them stream. A closed QuerySystem cannot be reopened.