Klasse NumberKey

Alle implementierten Schnittstellen:
Serializable, Comparable<Object>

public class NumberKey extends SimpleKey<BigDecimal>
This class can be used as an ObjectKey to uniquely identify an object within an application where the id consists of a single entity such a GUID or the value of a db row's primary key.
Version:
$Id: NumberKey.java 1849379 2018-12-20 12:33:43Z tv $
Autor:
John McNally, Stephen Haberman, Runako Godfrey
Siehe auch:
  • Konstruktordetails

    • NumberKey

      public NumberKey()
      Initializes the internal key value to null.
    • NumberKey

      public NumberKey(String key)
      Creates an NumberKey and set its internal representation
      Parameter:
      key - the key value as String
    • NumberKey

      public NumberKey(BigDecimal key)
      Creates an NumberKey and set its internal representation
      Parameter:
      key - the key value
    • NumberKey

      public NumberKey(NumberKey key)
      Creates a NumberKey that is equivalent to key.
      Parameter:
      key - the key value
    • NumberKey

      public NumberKey(long key)
      Creates a NumberKey equivalent to key.
      Parameter:
      key - the key value
    • NumberKey

      public NumberKey(double key)
      Creates a NumberKey equivalent to key.
      Parameter:
      key - the key value
    • NumberKey

      public NumberKey(int key)
      Creates a NumberKey equivalent to key. Convenience only.
      Parameter:
      key - the key value
    • NumberKey

      public NumberKey(Number key)
      Creates a NumberKey equivalent to key. Convenience only.
      Parameter:
      key - the key value
  • Methodendetails

    • setValue

      public void setValue(String key)
      Sets the internal representation using a String representation of a number.
      Parameter:
      key - the key value
      Löst aus:
      NumberFormatException - if key is not a valid number
    • getJdbcType

      public int getJdbcType()
      Returns the JDBC type of the key as defined in java.sql.Types.
      Angegeben von:
      getJdbcType in Klasse ObjectKey<BigDecimal>
      Gibt zurück:
      Types.NUMERIC.
    • compareTo

      public int compareTo(Object o)
      Beschreibung aus Klasse kopiert: ObjectKey
      Implements the compareTo method.
      Angegeben von:
      compareTo in Schnittstelle Comparable<Object>
      Setzt außer Kraft:
      compareTo in Klasse ObjectKey<BigDecimal>
      Parameter:
      o - the comparison value
      Gibt zurück:
      a numeric comparison of the two values
    • byteValue

      public byte byteValue()
      Returns the value of this NumberKey as a byte. This value is subject to the conversion rules set out in Number.byteValue()
      Gibt zurück:
      the NumberKey converted to a byte
    • intValue

      public int intValue()
      Returns the value of this NumberKey as an int. This value is subject to the conversion rules set out in BigDecimal.intValue(), importantly any fractional part will be discarded and if the underlying value is too big to fit in an int, only the low-order 32 bits are returned. Note that this conversion can lose information about the overall magnitude and precision of the NumberKey value as well as return a result with the opposite sign.
      Gibt zurück:
      the NumberKey converted to an int
    • shortValue

      public short shortValue()
      Returns the value of this NumberKey as a short. This value is subject to the conversion rules set out in BigDecimal.intValue(), importantly any fractional part will be discarded and if the underlying value is too big to fit in a long, only the low-order 64 bits are returned. Note that this conversion can lose information about the overall magnitude and precision of the NumberKey value as well as return a result with the opposite sign.
      Gibt zurück:
      the NumberKey converted to a short
    • longValue

      public long longValue()
      Returns the value of this NumberKey as a long. This value is subject to the conversion rules set out in BigDecimal.intValue()
      Gibt zurück:
      the NumberKey converted to a long
    • floatValue

      public float floatValue()
      Returns the value of this NumberKey as a float. This value is subject to the conversion rules set out in BigDecimal.floatValue(), most importantly if the underlying value has too great a magnitude to represent as a float, it will be converted to Float.NEGATIVE_INFINITY or Float.POSITIVE_INFINITY as appropriate.
      Gibt zurück:
      the NumberKey converted to a float
    • doubleValue

      public double doubleValue()
      Returns the value of this NumberKey as a double. This value is subject to the conversion rules set out in BigDecimal.doubleValue(), most importantly if the underlying value has too great a magnitude to represent as a double, it will be converted to Double.NEGATIVE_INFINITY or Double.POSITIVE_INFINITY as appropriate.
      Gibt zurück:
      the NumberKey converted to a double