Package nl.tue.storage.impl

Class CompressedStoreImpl<T>

java.lang.Object

nl.tue.storage.impl.CompressedStoreImpl<T>

All Implemented Interfaces:

CompressedStore<T>

public class CompressedStoreImpl<T>
extends java.lang.Object
implements CompressedStore<T>

Field Summary

Fields inherited from interface nl.tue.storage.CompressedStore

BLOCKSIZE

Constructor Summary

Constructors

Constructor	Description
CompressedStoreImpl(int alignment, Deflater<? super T> deflater)
CompressedStoreImpl(int alignment, Deflater<? super T> deflater, Inflater<? extends T> inflater)
CompressedStoreImpl(int alignment, Deflater<? super T> deflater, Inflater<? extends T> inflater, int blockSize)
CompressedStoreImpl(Deflater<? super T> deflater)
CompressedStoreImpl(Deflater<? super T> deflater, Inflater<? extends T> inflater)
CompressedStoreImpl(Deflater<? super T> deflater, Inflater<? extends T> inflater, int blockSize)

Method Summary

Modifier and Type	Method	Description
long	addToStorage(T object)	Adds a deflated version of the provided object to the storate.
int	getAlignment()	Returns the alignment of this store
int	getBlocksInUse()	Returns the number of blocks in use
Inflater<? extends T>	getInflater()	Returns the inflater of this store;
long	getMemory()	Returns the used memory by this storage
T	getObject(long index)	Retrieves the object at a the given index.
SkippableOutputStream	getOutputStreamForObject(long index)	This method returns an output stream for overwriting a previously stored object.
long	getSize()	Returns the number of bytes stored in the store
FastByteArrayInputStream	getStreamForObject(long index)	Retrieves the byte representation of an object at a the given index
long	getUnusedMemory()	Returns the unused memory by this storage
long	getWastedMemory()	Returns the wasted memory by this storage
void	removeAll()	Removes all elements from the store and resets it to it's initial state

Methods inherited from class java.lang.Object

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

Constructor Detail

CompressedStoreImpl

public CompressedStoreImpl(Deflater<? super T> deflater)

CompressedStoreImpl

public CompressedStoreImpl(Deflater<? super T> deflater,
                           Inflater<? extends T> inflater)

CompressedStoreImpl

public CompressedStoreImpl(Deflater<? super T> deflater,
                           Inflater<? extends T> inflater,
                           int blockSize)

CompressedStoreImpl

public CompressedStoreImpl(int alignment,
                           Deflater<? super T> deflater)

CompressedStoreImpl

public CompressedStoreImpl(int alignment,
                           Deflater<? super T> deflater,
                           Inflater<? extends T> inflater)

CompressedStoreImpl

public CompressedStoreImpl(int alignment,
                           Deflater<? super T> deflater,
                           Inflater<? extends T> inflater,
                           int blockSize)

Method Detail

addToStorage

public long addToStorage(T object)
                  throws StorageException

Description copied from interface: CompressedStore

Adds a deflated version of the provided object to the storate. The returned index is the location where this object can be retrieved from.

Specified by:

addToStorage in interface CompressedStore<T>

Returns:

the index of the first byte in the store

Throws:

StorageException

getStreamForObject

public FastByteArrayInputStream getStreamForObject(long index)

Description copied from interface: CompressedStore

Retrieves the byte representation of an object at a the given index

Specified by:

getStreamForObject in interface CompressedStore<T>

Parameters:

index - the start index of the object, provided when storing

Returns:

the byte[] representation of the object

getObject

public T getObject(long index)
            throws StorageException

Description copied from interface: CompressedStore

Retrieves the object at a the given index.

Specified by:

getObject in interface CompressedStore<T>

Parameters:

index - the start index of the object, provided when storing

Returns:

the object

Throws:

StorageException

getSize

public long getSize()

Description copied from interface: CompressedStore

Returns the number of bytes stored in the store

Specified by:

getSize in interface CompressedStore<T>

Returns:

getMemory

public long getMemory()

Description copied from interface: CompressedStore

Returns the used memory by this storage

Specified by:

getMemory in interface CompressedStore<T>

getWastedMemory

public long getWastedMemory()

Description copied from interface: CompressedStore

Returns the wasted memory by this storage

Specified by:

getWastedMemory in interface CompressedStore<T>

getUnusedMemory

public long getUnusedMemory()

Description copied from interface: CompressedStore

Returns the unused memory by this storage

Specified by:

getUnusedMemory in interface CompressedStore<T>

getInflater

public Inflater<? extends T> getInflater()

Description copied from interface: CompressedStore

Returns the inflater of this store;

Specified by:

getInflater in interface CompressedStore<T>

Returns:

getAlignment

public int getAlignment()

Description copied from interface: CompressedStore

Returns the alignment of this store

Specified by:

getAlignment in interface CompressedStore<T>

Returns:

getOutputStreamForObject

public SkippableOutputStream getOutputStreamForObject(long index)

Description copied from interface: CompressedStore

This method returns an output stream for overwriting a previously stored object. It is essential that this method is used with caution, as no checks are performed to avoid writing into the memory space of the next object!

Specified by:

getOutputStreamForObject in interface CompressedStore<T>

Returns:

removeAll

public void removeAll()

Description copied from interface: CompressedStore

Removes all elements from the store and resets it to it's initial state

Specified by:

removeAll in interface CompressedStore<T>

getBlocksInUse

public int getBlocksInUse()

Description copied from interface: CompressedStore

Returns the number of blocks in use

Specified by:

getBlocksInUse in interface CompressedStore<T>

Returns: