org.hsqldb.map

Class ValuePool

java.lang.Object

org.hsqldb.map.ValuePool

public class ValuePool
extends java.lang.Object

Supports pooling of Integer, Long, Double, BigDecimal, String and Date Java Objects. Leads to reduction in memory use when an Object is used more then twice in the database. getXXX methods are used for retrival of values. If a value is not in the pool, it is added to the pool and returned. When the pool gets full, half the contents that have been accessed less recently are purged.

Since:

1.7.2

Field Summary

Fields

Modifier and Type	Field and Description
static java.math.BigDecimal	BIG_DECIMAL_0
static java.math.BigDecimal	BIG_DECIMAL_1
static int[]	emptyIntArray
static java.lang.Object[]	emptyObjectArray
static java.lang.String[]	emptyStringArray
static java.lang.Integer	INTEGER_0
static java.lang.Integer	INTEGER_1
static java.lang.Integer	INTEGER_2
static java.lang.Integer	INTEGER_MAX
static java.lang.String	spaceString

Constructor Summary

Constructors

Constructor and Description
ValuePool()

Method Summary

Modifier and Type	Method and Description
static void	clearPool()
static java.math.BigDecimal	getBigDecimal(java.math.BigDecimal val)
static java.lang.Boolean	getBoolean(boolean b)
static java.lang.Double	getDouble(long val)
static java.lang.Integer	getInt(int val)
static java.lang.Long	getLong(long val)
static int	getMaxStringLength()
static java.lang.String	getString(java.lang.String val)
static java.lang.String	getSubString(java.lang.String val, int start, int limit)
static void	resetPool()
static void	resetPool(int[] sizeArray, int sizeFactor)

Methods inherited from class java.lang.Object

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

Field Detail

INTEGER_0

public static final java.lang.Integer INTEGER_0

INTEGER_1

public static final java.lang.Integer INTEGER_1

INTEGER_2

public static final java.lang.Integer INTEGER_2

INTEGER_MAX

public static final java.lang.Integer INTEGER_MAX

BIG_DECIMAL_0

public static final java.math.BigDecimal BIG_DECIMAL_0

BIG_DECIMAL_1

public static final java.math.BigDecimal BIG_DECIMAL_1

emptyStringArray

public static final java.lang.String[] emptyStringArray

emptyObjectArray

public static final java.lang.Object[] emptyObjectArray

emptyIntArray

public static final int[] emptyIntArray

spaceString

public static java.lang.String spaceString

Constructor Detail

ValuePool

public ValuePool()

Method Detail

getMaxStringLength

public static int getMaxStringLength()

resetPool

public static void resetPool(int[] sizeArray,
                             int sizeFactor)

resetPool

public static void resetPool()

clearPool

public static void clearPool()

getInt

public static java.lang.Integer getInt(int val)

getLong

public static java.lang.Long getLong(long val)

getDouble

public static java.lang.Double getDouble(long val)

getString

public static java.lang.String getString(java.lang.String val)

getSubString

public static java.lang.String getSubString(java.lang.String val,
                                            int start,
                                            int limit)

getBigDecimal

public static java.math.BigDecimal getBigDecimal(java.math.BigDecimal val)

getBoolean

public static java.lang.Boolean getBoolean(boolean b)