net.obsearch.storage.bdb
Class BDBOBStoreJeDouble

java.lang.Object
  net.obsearch.storage.bdb.AbstractBDBOBStoreJe<TupleDouble>
      net.obsearch.storage.bdb.BDBOBStoreJeDouble

All Implemented Interfaces:

OBStore<TupleDouble>, OBStoreDouble

public final class BDBOBStoreJeDouble
extends AbstractBDBOBStoreJe<TupleDouble>
implements OBStoreDouble

BDBOBStoreDouble is a wrapper for Berkeley indexes that assumes that keys are doubles and values are byte[].

Author:

Arnoldo Jose Muller Molina

Nested Class Summary

Nested classes/interfaces inherited from class net.obsearch.storage.bdb.AbstractBDBOBStoreJe

AbstractBDBOBStoreJe.ByteArrayIterator, AbstractBDBOBStoreJe.CursorIterator<T>

Field Summary

Fields inherited from class net.obsearch.storage.bdb.AbstractBDBOBStoreJe

counter, db, sequence, stats

Constructor Summary

BDBOBStoreJeDouble(String name, com.sleepycat.je.Database db, com.sleepycat.je.Database seq, OBStoreFactory fact, boolean duplicates)
Builds a new Storage system by receiving a Berkeley DB database that uses doubles as a primary indexing method.

Method Summary

double	bytesToValue(byte[] entry) Converts the value of the given entry into its primitive type.
OperationStatus	delete(double key) Deletes the given key and its corresponding value from the database.
byte[]	getValue(double key) Returns the associated value for the given key.
CloseIterator<TupleDouble>	processAll() Process all the elements in the DB.
CloseIterator<TupleDouble>	processRange(double low, double high) Process the given range of items (from low to high), including low and high.
CloseIterator<TupleDouble>	processRangeNoDup(double low, double high)
CloseIterator<TupleDouble>	processRangeReverse(double low, double high) Process the given range of items (from high to low), including low and high.
CloseIterator<TupleDouble>	processRangeReverseNoDup(double low, double high)
OperationStatus	put(double key, byte[] value) Inserts the key value pair.

Methods inherited from class net.obsearch.storage.bdb.AbstractBDBOBStoreJe

allowsDuplicatedData, close, delete, deleteAll, getFactory, getName, getReadStats, getStats, getValue, nextId, optimize, prepareBytes, processAllKeys, processRange, processRangeNoDup, processRangeReverse, processRangeReverseNoDup, put, putIfNew, setReadStats, size

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.obsearch.storage.OBStore

close, delete, deleteAll, getFactory, getName, getReadStats, getStats, getValue, nextId, optimize, prepareBytes, processRange, processRangeNoDup, processRangeReverse, processRangeReverseNoDup, put, setReadStats, size

Constructor Detail

BDBOBStoreJeDouble

public BDBOBStoreJeDouble(String name,
                          com.sleepycat.je.Database db,
                          com.sleepycat.je.Database seq,
                          OBStoreFactory fact,
                          boolean duplicates)
                   throws com.sleepycat.je.DatabaseException

Builds a new Storage system by receiving a Berkeley DB database that uses doubles as a primary indexing method.

Parameters:

db - The database to be stored.

seq - Sequences database.

name - Name of the database.

Throws:

com.sleepycat.je.DatabaseException - if something goes wrong with the database.

Method Detail

delete

public OperationStatus delete(double key)
                       throws OBStorageException

Description copied from interface: OBStoreDouble

Deletes the given key and its corresponding value from the database.

Specified by:

delete in interface OBStoreDouble

Parameters:

key - The key that will be deleted.

Returns:

net.obsearch.OperationStatus.Status#OK if the key was found, otherwise, net.obsearch.OperationStatus.Status#NOT_EXISTS.

Throws:

OBStorageException - If an exception occurs at the underlying storage system. You can query the exception to see more details regarding the nature of the error.

bytesToValue

public double bytesToValue(byte[] entry)

Converts the value of the given entry into its primitive type.

Specified by:

bytesToValue in interface OBStoreDouble

Parameters:

entry - The place where we will put the entry.

getValue

public byte[] getValue(double key)
                throws IllegalArgumentException,
                       OBStorageException

Description copied from interface: OBStoreDouble

Returns the associated value for the given key. If the underlying storage system can hold repeated keys, then an IllegalArgumentException is thrown.

Specified by:

getValue in interface OBStoreDouble

Parameters:

key - the key that will be searched.

Returns:

the associated value for the given key.

Throws:

IllegalArgumentException - If the underlying storage system can hold multiple keys.

OBStorageException - If an exception occurs at the underlying storage system. You can query the exception to see more details regarding the nature of the error.

put

public OperationStatus put(double key,
                           byte[] value)
                    throws IllegalArgumentException,
                           OBStorageException

Description copied from interface: OBStoreDouble

Inserts the key value pair. If the key existed, it will be overwritten.

Specified by:

put in interface OBStoreDouble

Parameters:

key - Key to insert

value - The value that the key will hold after this operation completes.

Returns:

net.obsearch.OperationStatus.Status#OK the record was inserted/updated successfully. net.obsearch.OperationStatus.Status#ERROR if the record could not be updated.

Throws:

OBStorageException - If an exception occurs at the underlying storage system. You can query the exception to see more details regarding the nature of the error.

IllegalArgumentException

processRange

public CloseIterator<TupleDouble> processRange(double low,
                                               double high)
                                        throws OBStorageException

Description copied from interface: OBStoreDouble

Process the given range of items (from low to high), including low and high. The TupleProcessor's process method will be called for each value found within the range.

Specified by:

processRange in interface OBStoreDouble

Throws:

OBStorageException - If an exception occurs at the underlying storage system. You can query the exception to see more details regarding the nature of the error.

processRangeNoDup

public CloseIterator<TupleDouble> processRangeNoDup(double low,
                                                    double high)
                                             throws OBStorageException

Throws:

OBStorageException

processRangeReverse

public CloseIterator<TupleDouble> processRangeReverse(double low,
                                                      double high)
                                               throws OBStorageException

Description copied from interface: OBStoreDouble

Process the given range of items (from high to low), including low and high. The TupleProcessor's process method will be called for each value found within the range.

Specified by:

processRangeReverse in interface OBStoreDouble

Throws:

OBStorageException - If an exception occurs at the underlying storage system. You can query the exception to see more details regarding the nature of the error.

processRangeReverseNoDup

public CloseIterator<TupleDouble> processRangeReverseNoDup(double low,
                                                           double high)
                                                    throws OBStorageException

Throws:

OBStorageException

processAll

public CloseIterator<TupleDouble> processAll()
                                      throws OBStorageException

Description copied from interface: OBStore

Process all the elements in the DB. Useful for debugging.

Specified by:

processAll in interface OBStore<TupleDouble>

Returns:

An iterator that goes through all the data in the DB.

Throws:

OBStorageException