Package org.kiwiproject.beta.jdbc

Class KiwiJdbc2

java.lang.Object

org.kiwiproject.beta.jdbc.KiwiJdbc2

@Beta
public final class KiwiJdbc2
extends Object

JDBC utilities that may (or may not) eventually move into KiwiJdbc in kiwi.

Method Summary

Modifier and Type	Method	Description
static <T> T[]	array(ResultSet rs, String columnLabel, Class<T> type)	Get an ARRAY column as an array of the specified reference type.
static <T> List<T>	arrayAsList(ResultSet rs, String columnLabel, Class<T> type)	Get an ARRAY column as a List of the specified type.
static <T> Set<T>	arrayAsSet(ResultSet rs, String columnLabel, Class<T> type)	Get an ARRAY column as a Set of the specified type.
static double[]	doubleArray(ResultSet rs, String columnLabel)	Get an ARRAY column as a double array.
static int[]	intArray(ResultSet rs, String columnLabel)	Get an ARRAY column as an int array.
static long[]	longArray(ResultSet rs, String columnLabel)	Get an ARRAY column as a long array.

Methods inherited from class java.lang.Object

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

Method Details

arrayAsList

public static <T> List<T> arrayAsList(ResultSet rs,
 String columnLabel,
 Class<T> type)
                               throws SQLException

Get an ARRAY column as a List of the specified type.

Type Parameters:

T - type parameter for the data type

Parameters:

rs - the ResultSet

columnLabel - the name of the array column in the ResultSet

type - the data type

Returns:

a list containing the values from the array, or an empty list if the database value is null or empty

Throws:

SQLException - if a database error occurred, e.g. the column doesn't exist

See Also:

• Array
• ResultSet.getArray(String)

arrayAsSet

public static <T> Set<T> arrayAsSet(ResultSet rs,
 String columnLabel,
 Class<T> type)
                             throws SQLException

Get an ARRAY column as a Set of the specified type.

Type Parameters:

T - type parameter for the data type

Parameters:

rs - the ResultSet

columnLabel - the name of the array column in the ResultSet

type - the data type

Returns:

a set containing the values from the array, or an empty set if the database value is null or empty

Throws:

SQLException - if a database error occurred, e.g. the column doesn't exist

See Also:

• Array
• ResultSet.getArray(String)

doubleArray

public static double[] doubleArray(ResultSet rs,
 String columnLabel)
                            throws SQLException

Get an ARRAY column as a double array.

Parameters:

rs - the ResultSet

columnLabel - the name of the array column in the ResultSet

Returns:

an array of double containing the values from the array, or an empty array if the database value is null or empty

Throws:

SQLException - if a database error occurred, e.g. the column doesn't exist

See Also:

• Array
• ResultSet.getArray(String)

intArray

public static int[] intArray(ResultSet rs,
 String columnLabel)
                      throws SQLException

Get an ARRAY column as an int array.

Parameters:

rs - the ResultSet

columnLabel - the name of the array column in the ResultSet

Returns:

an array of int containing the values from the array, or an empty array if the database value is null or empty

Throws:

SQLException - if a database error occurred, e.g. the column doesn't exist

See Also:

• Array
• ResultSet.getArray(String)

longArray

public static long[] longArray(ResultSet rs,
 String columnLabel)
                        throws SQLException

Get an ARRAY column as a long array.

Parameters:

rs - the ResultSet

columnLabel - the name of the array column in the ResultSet

Returns:

an array of long containing the values from the array, or an empty array if the database value is null or empty

Throws:

SQLException - if a database error occurred, e.g. the column doesn't exist

See Also:

• Array
• ResultSet.getArray(String)

array

public static <T> T[] array(ResultSet rs,
 String columnLabel,
 Class<T> type)
                     throws SQLException

Get an ARRAY column as an array of the specified reference type.

If the target type is a primitive double, int, or long, you can specify the wrapper type, or you can instead use one of the specialized primitive methods, e.g. doubleArray(ResultSet, String). Note that if the array returned by Array.getArray() is of a primitive type such as char[], then this method must convert that array to an array of wrapper objects which adds additional overhead. In those cases, using the specialized primitive methods will result in better performance (for the supported primitive types).

Type Parameters:

T - type parameter for the data type

Parameters:

rs - the ResultSet

columnLabel - the name of the array column in the ResultSet

type - the data type (must be a reference type)

Returns:

an array of objects of type T containing the values from the array, or an empty array if the database value is null or empty

Throws:

SQLException - if a database error occurred, e.g. the column doesn't exist

See Also:

• Array
• ResultSet.getArray(String)