javax.management.openmbean
Class OpenType

java.lang.Object
  javax.management.openmbean.OpenType

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

ArrayType, CompositeType, SimpleType, TabularType

public abstract class OpenType
extends Object
implements Serializable

The OpenType class is the parent abstract class of all classes which describe the actual open type of open data values.

An open type is defined by:

• the fully qualified Java class name of the open data values this type describes; note that only a limited set of Java classes is allowed for open data values (see ALLOWED_CLASSNAMES),
• its name,
• its description.

Since:

1.5

See Also:

Serialized Form

Field Summary

static String[]

ALLOWED_CLASSNAMES List of the fully qualified names of the Java classes allowed for open data values.

Constructor Summary

protected

OpenType(String className, String typeName, String description) Constructs an OpenType instance (actually a subclass instance as OpenType is abstract), checking for the validity of the given parameters.

Method Summary

abstract boolean	equals(Object obj) Compares the specified obj parameter with this open type instance for equality.
String	getClassName() Returns the fully qualified Java class name of the open data values this open type describes.
String	getDescription() Returns the text description of this OpenType instance.
String	getTypeName() Returns the name of this OpenType instance.
abstract int	hashCode() Returns a hash code value for the object.
boolean	isArray() Returns true if the open data values this open type describes are arrays, false otherwise.
abstract boolean	isValue(Object obj) Tests whether obj is a value for this open type.
abstract String	toString() Returns a string representation of this open type instance.

Methods inherited from class java.lang.Object

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

Field Detail

ALLOWED_CLASSNAMES

public static final String[] ALLOWED_CLASSNAMES

List of the fully qualified names of the Java classes allowed for open data values. A multidimensional array of any one of these classes is also an allowed for open data values.

ALLOWED_CLASSNAMES = { 
        "java.lang.Void",
        "java.lang.Boolean",
        "java.lang.Character",
        "java.lang.Byte",
        "java.lang.Short",
        "java.lang.Integer",
        "java.lang.Long",
        "java.lang.Float",
        "java.lang.Double",
        "java.lang.String",
        "java.math.BigDecimal",
        "java.math.BigInteger",
        "java.util.Date",
        "javax.management.ObjectName",
        CompositeData.class.getName(),
        TabularData.class.getName() } ;
       

Constructor Detail

OpenType

protected OpenType(String className,
                   String typeName,
                   String description)
            throws OpenDataException

Constructs an OpenType instance (actually a subclass instance as OpenType is abstract), checking for the validity of the given parameters. The validity constraints are described below for each parameter.

Parameters:

className - The fully qualified Java class name of the open data values this open type describes. The valid Java class names allowed for open data values are listed in ALLOWED_CLASSNAMES. A multidimensional array of any one of these classes is also an allowed class, in which case the class name follows the rules defined by the method getName() of java.lang.Class. For example, a 3-dimensional array of Strings has for class name "[[[Ljava.lang.String;" (without the quotes).

typeName - The name given to the open type this instance represents; cannot be a null or empty string.

description - The human readable description of the open type this instance represents; cannot be a null or empty string.

Throws:

IllegalArgumentException - if className, typeName or description is a null or empty string

OpenDataException - if className is not one of the allowed Java class names for open data

Method Detail

getClassName

public String getClassName()

Returns the fully qualified Java class name of the open data values this open type describes. The only possible Java class names for open data values are listed in ALLOWED_CLASSNAMES. A multidimensional array of any one of these classes is also an allowed class, in which case the class name follows the rules defined by the method getName() of java.lang.Class. For example, a 3-dimensional array of Strings has for class name "[[[Ljava.lang.String;" (without the quotes).

Returns:

the class name.

getTypeName

public String getTypeName()

Returns the name of this OpenType instance.

Returns:

the type name.

getDescription

public String getDescription()

Returns the text description of this OpenType instance.

Returns:

the description.

isArray

public boolean isArray()

Returns true if the open data values this open type describes are arrays, false otherwise.

Returns:

true if this is an array type.

isValue

public abstract boolean isValue(Object obj)

Tests whether obj is a value for this open type.

Parameters:

obj - the object to be tested for validity.

Returns:

true if obj is a value for this open type, false otherwise.

equals

public abstract boolean equals(Object obj)

Compares the specified obj parameter with this open type instance for equality.

Overrides:

equals in class Object

Parameters:

obj - the object to compare to.

Returns:

true if this object and obj are equal.

See Also:

Object.hashCode(), Hashtable

hashCode

public abstract int hashCode()

Description copied from class: Object

Returns a hash code value for the object. This method is supported for the benefit of hashtables such as those provided by java.util.Hashtable.

The general contract of hashCode is:

• Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
• If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
• It is not required that if two objects are unequal according to the Object.equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hashtables.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java^TM programming language.)

Overrides:

hashCode in class Object

Returns:

a hash code value for this object.

See Also:

Object.equals(java.lang.Object), Hashtable

toString

public abstract String toString()

Returns a string representation of this open type instance.

Overrides:

toString in class Object

Returns:

the string representation.