* The openAttributes, openConstructors, * openOperations and notifications * array parameters are internally copied, so that subsequent changes * to the arrays referenced by these parameters have no effect on this instance. *
*
*
* @param className The fully qualified Java class name of
* the open MBean described by this OpenMBeanInfoSupport instance.
*
* @param description A human readable description of
* the open MBean described by this OpenMBeanInfoSupport instance.
*
* @param openAttributes The list of exposed attributes of the described open MBean;
* Must be an array of instances of a subclass of MBeanAttributeInfo,
* typically OpenMBeanAttributeInfoSupport.
*
* @param openConstructors The list of exposed public constructors of the described open MBean;
* Must be an array of instances of a subclass of MBeanConstructorInfo,
* typically OpenMBeanConstructorInfoSupport.
*
* @param openOperations The list of exposed operations of the described open MBean.
* Must be an array of instances of a subclass of MBeanOperationInfo,
* typically OpenMBeanOperationInfoSupport.
*
* @param notifications The list of notifications emitted by the described open MBean.
*
* @throws ArrayStoreException If openAttributes, openConstructors or openOperations
* is not an array of instances of a subclass of MBeanAttributeInfo,
* MBeanConstructorInfo or MBeanOperationInfo respectively.
*/
public OpenMBeanInfoSupport(String className,
String description,
OpenMBeanAttributeInfo[] openAttributes,
OpenMBeanConstructorInfo[] openConstructors,
OpenMBeanOperationInfo[] openOperations,
MBeanNotificationInfo[] notifications) {
super(className,
description,
( openAttributes == null ? null : attributesArrayCopyCast(openAttributes) ), // may throw an ArrayStoreException
( openConstructors == null ? null : constructorsArrayCopyCast(openConstructors) ), // may throw an ArrayStoreException
( openOperations == null ? null : operationsArrayCopyCast(openOperations) ), // may throw an ArrayStoreException
( notifications == null ? null : notificationsArrayCopy(notifications) ));
}
private static MBeanAttributeInfo[] attributesArrayCopyCast(OpenMBeanAttributeInfo[] src) throws ArrayStoreException {
MBeanAttributeInfo[] dst = new MBeanAttributeInfo[src.length];
System.arraycopy(src, 0, dst, 0, src.length); // may throw an ArrayStoreException
return dst;
}
private static MBeanConstructorInfo[] constructorsArrayCopyCast(OpenMBeanConstructorInfo[] src) throws ArrayStoreException {
MBeanConstructorInfo[] dst = new MBeanConstructorInfo[src.length];
System.arraycopy(src, 0, dst, 0, src.length); // may throw an ArrayStoreException
return dst;
}
private static MBeanOperationInfo[] operationsArrayCopyCast(OpenMBeanOperationInfo[] src) throws ArrayStoreException {
MBeanOperationInfo[] dst = new MBeanOperationInfo[src.length];
System.arraycopy(src, 0, dst, 0, src.length); // may throw an ArrayStoreException
return dst;
}
private static MBeanNotificationInfo[] notificationsArrayCopy(MBeanNotificationInfo[] src) {
MBeanNotificationInfo[] dst = new MBeanNotificationInfo[src.length];
System.arraycopy(src, 0, dst, 0, src.length);
return dst;
}
/* *** Commodity methods from java.lang.Object *** */
/**
* Compares the specified obj parameter with this OpenMBeanInfoSupport instance for equality.
*
* Returns true if and only if all of the following statements are true: *
OpenMBeanInfo interface,OpenMBeanInfo interface.
* OpenMBeanInfoSupport instance;
*
* @return true if the specified object is equal to this OpenMBeanInfoSupport instance.
*/
public boolean equals(Object obj) {
// if obj is null, return false
//
if (obj == null) {
return false;
}
// if obj is not a OpenMBeanInfo, return false
//
OpenMBeanInfo other;
try {
other = (OpenMBeanInfo) obj;
} catch (ClassCastException e) {
return false;
}
// Now, really test for equality between this OpenMBeanInfo implementation and the other:
//
// their MBean className should be equal
if ( ! this.getClassName().equals(other.getClassName()) ) {
return false;
}
// their infos on attributes should be equal (order not significant => equality between sets, not arrays or lists)
if ( ! new HashSet(Arrays.asList(this.getAttributes())).equals(new HashSet(Arrays.asList(other.getAttributes()))) ) {
return false;
}
// their infos on constructors should be equal (order not significant => equality between sets, not arrays or lists)
if ( ! new HashSet(Arrays.asList(this.getConstructors())).equals(new HashSet(Arrays.asList(other.getConstructors()))) ) {
return false;
}
// their infos on operations should be equal (order not significant => equality between sets, not arrays or lists)
if ( ! new HashSet(Arrays.asList(this.getOperations())).equals(new HashSet(Arrays.asList(other.getOperations()))) ) {
return false;
}
// their infos on notifications should be equal (order not significant => equality between sets, not arrays or lists)
if ( ! new HashSet(Arrays.asList(this.getNotifications())).equals(new HashSet(Arrays.asList(other.getNotifications()))) ) {
return false;
}
// All tests for equality were successfull
//
return true;
}
/**
* Returns the hash code value for this OpenMBeanInfoSupport instance.
*
* The hash code of an OpenMBeanInfoSupport instance is the sum of the hash codes
* of all elements of information used in equals comparisons
* (ie: its class name, and its infos on attributes, constructors, operations and notifications,
* where the hashCode of each of these arrays is calculated by a call to
* new java.util.HashSet(java.util.Arrays.asList(this.getSignature)).hashCode()).
*
* This ensures that t1.equals(t2) implies that t1.hashCode()==t2.hashCode()
* for any two OpenMBeanInfoSupport instances t1 and t2,
* as required by the general contract of the method
* {@link Object#hashCode() Object.hashCode()}.
*
* However, note that another instance of a class implementing the OpenMBeanInfo interface
* may be equal to this OpenMBeanInfoSupport instance as defined by {@link #equals(java.lang.Object)},
* but may have a different hash code if it is calculated differently.
*
* As OpenMBeanInfoSupport 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.
*
* @return the hash code value for this OpenMBeanInfoSupport instance
*/
public int hashCode() {
// Calculate the hash code value if it has not yet been done (ie 1st call to hashCode())
//
if (myHashCode == null) {
int value = 0;
value += this.getClassName().hashCode();
value += new HashSet(Arrays.asList(this.getAttributes())).hashCode();
value += new HashSet(Arrays.asList(this.getConstructors())).hashCode();
value += new HashSet(Arrays.asList(this.getOperations())).hashCode();
value += new HashSet(Arrays.asList(this.getNotifications())).hashCode();
myHashCode = new Integer(value);
}
// return always the same hash code for this instance (immutable)
//
return myHashCode.intValue();
}
/**
* Returns a string representation of this OpenMBeanInfoSupport instance.
*
* The string representation consists of the name of this class (ie javax.management.openmbean.OpenMBeanInfoSupport),
* the MBean class name,
* and the string representation of infos on attributes, constructors, operations and notifications of the described MBean.
*
* As OpenMBeanInfoSupport 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.
*
* @return a string representation of this OpenMBeanInfoSupport instance
*/
public String toString() {
// Calculate the hash code value if it has not yet been done (ie 1st call to toString())
//
if (myToString == null) {
myToString = new StringBuffer()
.append(this.getClass().getName())
.append("(mbean_class_name=")
.append(this.getClassName())
.append(",attributes=")
.append(Arrays.asList(this.getAttributes()).toString())
.append(",constructors=")
.append(Arrays.asList(this.getConstructors()).toString())
.append(",operations=")
.append(Arrays.asList(this.getOperations()).toString())
.append(",notifications=")
.append(Arrays.asList(this.getNotifications()).toString())
.append(")")
.toString();
}
// return always the same string representation for this instance (immutable)
//
return myToString;
}
}