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Java Standard Edition (SE)

OpenType


compact3
javax.management.openmbean

Class OpenType<T>

  • Type Parameters:
    T - the Java type that instances described by this type must have. For example, SimpleType.INTEGER is a SimpleType<Integer> which is a subclass of OpenType<Integer>, meaning that an attribute, parameter, or return value that is described as a SimpleType.INTEGER must have Java type Integer.
    All Implemented Interfaces:
    Serializable
    Direct Known Subclasses:
    ArrayType, CompositeType, SimpleType, TabularType


    public abstract class OpenType<T>
    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_LIST),
    • its name,
    • its description.
    Since:
    1.5
    See Also:
    Serialized Form
    • Field Detail

      • ALLOWED_CLASSNAMES_LIST

        public static final List<String> ALLOWED_CLASSNAMES_LIST
        List of the fully qualified names of the Java classes allowed for open data values. A multidimensional array of any one of these classes or their corresponding primitive types is also an allowed class for open data values.
        ALLOWED_CLASSNAMES_LIST = {
                "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_LIST. A multidimensional array of any one of these classes or their corresponding primitive types 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_LIST. A multidimensional array of any one of these classes or their corresponding primitive types 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), a 3-dimensional array of Integers has for class name "[[[Ljava.lang.Integer;" (without the quotes), and a 3-dimensional array of int has for class name "[[[I" (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(), HashMap
      • 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 hash tables such as those provided by HashMap.

        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 hash tables.

        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™ programming language.)

        Overrides:
        hashCode in class Object
        Returns:
        a hash code value for this object.
        See Also:
        Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)
      • toString

        public abstract String toString()
        Returns a string representation of this open type instance.
        Overrides:
        toString in class Object
        Returns:
        the string representation.


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