org.postgresql.jdbc

Class ArrayEncoding.NumberArrayEncoder<N extends java.lang.Number>

java.lang.Object

org.postgresql.jdbc.ArrayEncoding.AbstractArrayEncoder<N[]>

org.postgresql.jdbc.ArrayEncoding.NumberArrayEncoder<N>

Type Parameters:

N - The base type of array.

All Implemented Interfaces:

ArrayEncoding.ArrayEncoder<N[]>

Enclosing class:

ArrayEncoding

private abstract static class ArrayEncoding.NumberArrayEncoder<N extends java.lang.Number>
extends ArrayEncoding.AbstractArrayEncoder<N[]>

Base class to provide support for Number based arrays.

Field Summary

Fields

Modifier and Type	Field and Description
private int	fieldSize

Fields inherited from class org.postgresql.jdbc.ArrayEncoding.AbstractArrayEncoder

arrayOid

Constructor Summary

Constructors

Constructor and Description
NumberArrayEncoder(int fieldSize, int oid, int arrayOid)

Method Summary

Modifier and Type	Method and Description
(package private) void	appendArray(java.lang.StringBuilder sb, char delim, N[] array) Append String representation of array to sb.
(package private) int	countNulls(N[] array) Counts the number of null elements in array.
byte[]	toBinaryRepresentation(BaseConnection connection, N[] array, int oid) Creates binary representation of the array.
(package private) byte[]	toSingleDimensionBinaryRepresentation(BaseConnection connection, N[] array) Creates byte[] of just the raw data (no metadata).
protected abstract void	write(N number, byte[] bytes, int offset) Write single value (number) to bytes beginning at offset.
private byte[]	writeBytes(N[] array, int nullCount, int offset)

Methods inherited from class org.postgresql.jdbc.ArrayEncoding.AbstractArrayEncoder

getDefaultArrayTypeOid, getTypeOID, supportBinaryRepresentation, toArrayString

Methods inherited from class java.lang.Object

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

Field Detail

fieldSize

private final int fieldSize

Constructor Detail

NumberArrayEncoder

NumberArrayEncoder(int fieldSize,
                   int oid,
                   int arrayOid)

Parameters:

fieldSize - The fixed size to represent each value in binary.

oid - The base type oid.

arrayOid - The array type oid.

Method Detail

countNulls

final int countNulls(N[] array)

Counts the number of null elements in array.

Overrides:

countNulls in class ArrayEncoding.AbstractArrayEncoder<N extends java.lang.Number[]>

Parameters:

array - The array to count null elements in.

Returns:

The number of null elements in array.

toBinaryRepresentation

public final byte[] toBinaryRepresentation(BaseConnection connection,
                                           N[] array,
                                           int oid)
                                    throws java.sql.SQLException,
                                           java.sql.SQLFeatureNotSupportedException

Creates binary representation of the array.

Parameters:

connection - The connection the binary representation will be used on. Attributes from the connection might impact how values are translated to binary.

array - The array to binary encode. Must not be null, but may contain null elements.

oid - The array type oid to use. Calls to ArrayEncoding.ArrayEncoder.supportBinaryRepresentation(int) must have returned true.

Returns:

The binary representation of array.

Throws:

java.sql.SQLFeatureNotSupportedException - If ArrayEncoding.ArrayEncoder.supportBinaryRepresentation(int) is false for oid.

java.sql.SQLException

toSingleDimensionBinaryRepresentation

final byte[] toSingleDimensionBinaryRepresentation(BaseConnection connection,
                                                   N[] array)
                                            throws java.sql.SQLException,
                                                   java.sql.SQLFeatureNotSupportedException

Creates byte[] of just the raw data (no metadata).

Specified by:

toSingleDimensionBinaryRepresentation in class ArrayEncoding.AbstractArrayEncoder<N extends java.lang.Number[]>

Parameters:

connection - The connection the binary representation will be used on.

array - The array to create binary representation of. Will not be null, but may contain null elements.

Returns:

byte[] of just the raw data (no metadata).

Throws:

java.sql.SQLFeatureNotSupportedException - If ArrayEncoding.AbstractArrayEncoder.supportBinaryRepresentation(int) is false for oid.

java.sql.SQLException

writeBytes

private byte[] writeBytes(N[] array,
                          int nullCount,
                          int offset)

write

protected abstract void write(N number,
                              byte[] bytes,
                              int offset)

Write single value (number) to bytes beginning at offset.

Parameters:

number - The value to write to bytes. This will never be null.

bytes - The byte[] to write to.

offset - The offset into bytes to write the number value.

appendArray

final void appendArray(java.lang.StringBuilder sb,
                       char delim,
                       N[] array)

Append String representation of array to sb.

Specified by:

appendArray in class ArrayEncoding.AbstractArrayEncoder<N extends java.lang.Number[]>

Parameters:

sb - The StringBuilder to append to.

delim - The delimiter between elements.

array - The array to represent. Will not be null, but may contain null elements.