H2 Database Engine 2.3.232 · org.h2.mvstore.type.DataType

Method Summary

Modifier and Type	Method and Description
public int	Returns: index of the key , if found, - index of the insertion point, if not binarySearch(T to search for key, Object to search within (an array of type T) storage, int number of data items in the storage size, int for key position initialGuess) Perform binary search for the key within the storage
public int	Returns: -1 if the first key is smaller, 1 if larger, and 0 if equal compare(T the first key a, T the second key b) Redeclares java.util.Comparator.compare. Compare two keys.
public T[]	Returns: storage object createStorage(int number of values to hold size) Create storage object of array type to hold values
public int	Returns: the used memory getMemory(T the object obj) Calculates the amount of used memory in bytes.
public boolean	Returns: true if memory estimation is allowed isMemoryEstimationAllowed() Whether memory estimation based on previously seen values is allowed/desirable
public T	Returns: the object read(ByteBuffer the source buffer buff) Read an object.
public void	read(ByteBuffer the target buffer buff, Object the objects storage, int the number of objects to read len) Read a list of objects.
public void	write(WriteBuffer the target buffer buff, T the value obj) Write an object.
public void	write(WriteBuffer the target buffer buff, Object the objects storage, int the number of objects to write len) Write a list of objects.

Inherited from java.util.Comparator:: comparing comparing comparingDouble comparingInt comparingLong equals naturalOrder nullsFirst nullsLast reversed reverseOrder thenComparing thenComparing thenComparing thenComparingDouble thenComparingInt thenComparingLong

Method Detail

binarySearch	back to summary
public int binarySearch(T key, Object storage, int size, int initialGuess) Perform binary search for the key within the storage Parameters key:T to search for storage:Object to search within (an array of type T) size:int number of data items in the storage initialGuess:int for key position Returns:int index of the key , if found, - index of the insertion point, if not

binarySearch

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public int binarySearch(T key, Object storage, int size, int initialGuess)

Perform binary search for the key within the storage

Parameters

key:T: to search for
storage:Object: to search within (an array of type T)
size:int: number of data items in the storage
initialGuess:int: for key position

Returns:int

index of the key , if found, - index of the insertion point, if not

compare	back to summary
public int compare(T a, T b) Redeclares java.util.Comparator.compare. Compare two keys. Parameters a:T the first key b:T the second key Returns:int -1 if the first key is smaller, 1 if larger, and 0 if equal Annotations @Override Exceptions UnsupportedOperationException: if the type is not orderable

compare

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public int compare(T a, T b)

Redeclares java.util.Comparator.compare.

Compare two keys.

Parameters

a:T: the first key
b:T: the second key

Returns:int

-1 if the first key is smaller, 1 if larger, and 0 if equal

Annotations

@Override

Exceptions

UnsupportedOperationException:: if the type is not orderable

createStorage	back to summary
public T[] createStorage(int size) Create storage object of array type to hold values Parameters size:int number of values to hold Returns:T[] storage object

createStorage

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public T[] createStorage(int size)

Create storage object of array type to hold values

Parameters

size:int: number of values to hold

Returns:T[]

storage object

getMemory	back to summary
public int getMemory(T obj) Calculates the amount of used memory in bytes. Parameters obj:T the object Returns:int the used memory

getMemory

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public int getMemory(T obj)

Calculates the amount of used memory in bytes.

Parameters

obj:T: the object

Returns:int

the used memory

isMemoryEstimationAllowed	back to summary
public boolean isMemoryEstimationAllowed() Whether memory estimation based on previously seen values is allowed/desirable Returns:boolean true if memory estimation is allowed

isMemoryEstimationAllowed

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public boolean isMemoryEstimationAllowed()

Whether memory estimation based on previously seen values is allowed/desirable

Returns:boolean: true if memory estimation is allowed

read	back to summary
public T read(ByteBuffer buff) Read an object. Parameters buff:ByteBuffer the source buffer Returns:T the object

read

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public T read(ByteBuffer buff)

Read an object.

Parameters

buff:ByteBuffer: the source buffer

Returns:T

the object

read	back to summary
public void read(ByteBuffer buff, Object storage, int len) Read a list of objects. Parameters buff:ByteBuffer the target buffer storage:Object the objects len:int the number of objects to read

read

back to summary

public void read(ByteBuffer buff, Object storage, int len)

Read a list of objects.

Parameters

buff:ByteBuffer: the target buffer
storage:Object: the objects
len:int: the number of objects to read

write	back to summary
public void write(WriteBuffer buff, T obj) Write an object. Parameters buff:WriteBuffer the target buffer obj:T the value

write

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public void write(WriteBuffer buff, T obj)

Write an object.

Parameters

buff:WriteBuffer: the target buffer
obj:T: the value

write	back to summary
public void write(WriteBuffer buff, Object storage, int len) Write a list of objects. Parameters buff:WriteBuffer the target buffer storage:Object the objects len:int the number of objects to write

write

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public void write(WriteBuffer buff, Object storage, int len)

Write a list of objects.

Parameters

buff:WriteBuffer: the target buffer
storage:Object: the objects
len:int: the number of objects to write

public Interface DataType<T>

Method Summary

Method Detail