Module java.management

Package javax.management.openmbean

Class SimpleType<T>

java.lang.Object

javax.management.openmbean.OpenType<T>

javax.management.openmbean.SimpleType<T>

Type Parameters:

T - the Java type that values described by this SimpleType must have.

All Implemented Interfaces:

Serializable

public final class SimpleType<T>
extends OpenType<T>

The SimpleType class is the open type class whose instances describe all open data values which are neither arrays, nor CompositeData values, nor TabularData values. It predefines all its possible instances as static fields, and has no public constructor.

Given a SimpleType instance describing values whose Java class name is className, the internal fields corresponding to the name and description of this SimpleType instance are also set to className. In other words, its methods getClassName, getTypeName and getDescription all return the same string value className.

Since:

1.5

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final SimpleType<BigDecimal>	BIGDECIMAL	The SimpleType instance describing values whose Java class name is java.math.BigDecimal.
static final SimpleType<BigInteger>	BIGINTEGER	The SimpleType instance describing values whose Java class name is java.math.BigInteger.
static final SimpleType<Boolean>	BOOLEAN	The SimpleType instance describing values whose Java class name is java.lang.Boolean.
static final SimpleType<Byte>	BYTE	The SimpleType instance describing values whose Java class name is java.lang.Byte.
static final SimpleType<Character>	CHARACTER	The SimpleType instance describing values whose Java class name is java.lang.Character.
static final SimpleType<Date>	DATE	The SimpleType instance describing values whose Java class name is java.util.Date.
static final SimpleType<Double>	DOUBLE	The SimpleType instance describing values whose Java class name is java.lang.Double.
static final SimpleType<Float>	FLOAT	The SimpleType instance describing values whose Java class name is java.lang.Float.
static final SimpleType<Integer>	INTEGER	The SimpleType instance describing values whose Java class name is java.lang.Integer.
static final SimpleType<Long>	LONG	The SimpleType instance describing values whose Java class name is java.lang.Long.
static final SimpleType<ObjectName>	OBJECTNAME	The SimpleType instance describing values whose Java class name is javax.management.ObjectName.
static final SimpleType<Short>	SHORT	The SimpleType instance describing values whose Java class name is java.lang.Short.
static final SimpleType<String>	STRING	The SimpleType instance describing values whose Java class name is java.lang.String.
static final SimpleType<Void>	VOID	The SimpleType instance describing values whose Java class name is java.lang.Void.

Fields declared in class javax.management.openmbean.OpenType

ALLOWED_CLASSNAMES, ALLOWED_CLASSNAMES_LIST

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)	Compares the specified obj parameter with this SimpleType instance for equality.
int	hashCode()	Returns the hash code value for this SimpleType instance.
boolean	isValue(Object obj)	Tests whether obj is a value for this SimpleType instance.
Object	readResolve()	Replace an object read from an ObjectInputStream with the unique instance for that value.
String	toString()	Returns a string representation of this SimpleType instance.

Methods declared in class javax.management.openmbean.OpenType

getClassName, getDescription, getTypeName, isArray

Methods declared in class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

VOID

public static final SimpleType<Void> VOID

The SimpleType instance describing values whose Java class name is java.lang.Void.

BOOLEAN

public static final SimpleType<Boolean> BOOLEAN

The SimpleType instance describing values whose Java class name is java.lang.Boolean.

CHARACTER

public static final SimpleType<Character> CHARACTER

The SimpleType instance describing values whose Java class name is java.lang.Character.

BYTE

public static final SimpleType<Byte> BYTE

The SimpleType instance describing values whose Java class name is java.lang.Byte.

SHORT

public static final SimpleType<Short> SHORT

The SimpleType instance describing values whose Java class name is java.lang.Short.

INTEGER

public static final SimpleType<Integer> INTEGER

The SimpleType instance describing values whose Java class name is java.lang.Integer.

LONG

public static final SimpleType<Long> LONG

The SimpleType instance describing values whose Java class name is java.lang.Long.

FLOAT

public static final SimpleType<Float> FLOAT

The SimpleType instance describing values whose Java class name is java.lang.Float.

DOUBLE

public static final SimpleType<Double> DOUBLE

The SimpleType instance describing values whose Java class name is java.lang.Double.

STRING

public static final SimpleType<String> STRING

The SimpleType instance describing values whose Java class name is java.lang.String.

BIGDECIMAL

public static final SimpleType<BigDecimal> BIGDECIMAL

The SimpleType instance describing values whose Java class name is java.math.BigDecimal.

BIGINTEGER

public static final SimpleType<BigInteger> BIGINTEGER

The SimpleType instance describing values whose Java class name is java.math.BigInteger.

DATE

public static final SimpleType<Date> DATE

The SimpleType instance describing values whose Java class name is java.util.Date.

OBJECTNAME

public static final SimpleType<ObjectName> OBJECTNAME

The SimpleType instance describing values whose Java class name is javax.management.ObjectName.

Method Details

isValue

public boolean isValue(Object obj)

Tests whether obj is a value for this SimpleType instance.

This method returns true if and only if obj is not null and obj's class name is the same as the className field defined for this SimpleType instance (ie the class name returned by the getClassName method).

Specified by:

isValue in class OpenType<T>

Parameters:

obj - the object to be tested.

Returns:

true if obj is a value for this SimpleType instance.

equals

public boolean equals(Object obj)

Compares the specified obj parameter with this SimpleType instance for equality.

Two SimpleType instances are equal if and only if their getClassName methods return the same value.

Specified by:

equals in class OpenType<T>

Parameters:

obj - the object to be compared for equality with this SimpleType instance; if obj is null or is not an instance of the class SimpleType, equals returns false.

Returns:

true if the specified object is equal to this SimpleType instance.

See Also:

• Object.hashCode()
• HashMap

hashCode

public int hashCode()

Returns the hash code value for this SimpleType instance. The hash code of a SimpleType instance is the hash code of the string value returned by the getClassName method.

As SimpleType instances are immutable, the hash code for this instance is calculated once, on the first call to hashCode, and then the same value is returned for subsequent calls.

Overrides:

hashCode in class Object

Returns:

the hash code value for this SimpleType instance

See Also:

• Object.equals(java.lang.Object)
• System.identityHashCode(java.lang.Object)

toString

public String toString()

Returns a string representation of this SimpleType instance.

The string representation consists of the name of this class (ie javax.management.openmbean.SimpleType) and the type name for this instance (which is the java class name of the values this SimpleType instance represents).

As SimpleType instances are immutable, the string representation for this instance is calculated once, on the first call to toString, and then the same value is returned for subsequent calls.

Specified by:

toString in class OpenType<T>

Returns:

a string representation of this SimpleType instance

readResolve

public Object readResolve()
                   throws ObjectStreamException

Replace an object read from an ObjectInputStream with the unique instance for that value.

Returns:

the replacement object.

Throws:

ObjectStreamException - if the read object cannot be resolved.