OpenMBeanParameterInfoSupport.java 文件源码

/**
 * Constructs an {@code OpenMBeanParameterInfoSupport} instance,
 * which describes the parameter used in one or more operations or
 * constructors of a class of open MBeans, with the specified
 * {@code name}, {@code openType}, {@code description},
 * and {@code descriptor}.
 *
 * <p>The {@code descriptor} can contain entries that will define
 * the values returned by certain methods of this class, as
 * explained in the <a href="package-summary.html#constraints">
 * package description</a>.
 *
 * @param name  cannot be a null or empty string.
 *
 * @param description  cannot be a null or empty string.
 *
 * @param openType  cannot be null.
 *
 * @param descriptor The descriptor for the parameter.  This may be null
 * which is equivalent to an empty descriptor.
 *
 * @throws IllegalArgumentException if {@code name} or {@code
 * description} are null or empty string, or {@code openType} is
 * null, or the descriptor entries are invalid as described in the
 * <a href="package-summary.html#constraints">package
 * description</a>.
 *
 * @since 1.6
 */
public OpenMBeanParameterInfoSupport(String name,
                                     String description,
                                     OpenType<?> openType,
                                     Descriptor descriptor) {


    // Construct parent's state
    //
    super(name,
          (openType==null) ? null : openType.getClassName(),
          description,
          ImmutableDescriptor.union(descriptor,(openType==null)?null:
            openType.getDescriptor()));

    // Initialize this instance's specific state
    //
    this.openType = openType;

    descriptor = getDescriptor();  // replace null by empty
    this.defaultValue = valueFrom(descriptor, "defaultValue", openType);
    this.legalValues = valuesFrom(descriptor, "legalValues", openType);
    this.minValue = comparableValueFrom(descriptor, "minValue", openType);
    this.maxValue = comparableValueFrom(descriptor, "maxValue", openType);

    try {
        check(this);
    } catch (OpenDataException e) {
        throw new IllegalArgumentException(e.getMessage(), e);
    }
}