File	Doc	Category	Size	Date	Package
OpenMBeanConstructorInfoSupport.java	API Doc	Java SE 6 API	9369	Tue Jun 10 00:26:16 BST 2008	javax.management.openmbean

OpenMBeanConstructorInfoSupport

• java.lang.Object
  • javax.management.MBeanFeatureInfo
    • javax.management.MBeanConstructorInfo

Fields Summary
static final long	serialVersionUID
private transient Integer	myHashCode
private transient String	myToString

Constructors Summary
public OpenMBeanConstructorInfoSupport(String name, String description, OpenMBeanParameterInfo[] signature) Constructs an {@code OpenMBeanConstructorInfoSupport} instance, which describes the constructor of a class of open MBeans with the specified {@code name}, {@code description} and {@code signature}. The {@code signature} array parameter is internally copied, so that subsequent changes to the array referenced by {@code signature} have no effect on this instance. param name cannot be a null or empty string. param description cannot be a null or empty string. param signature can be null or empty if there are no parameters to describe. throws IllegalArgumentException if {@code name} or {@code description} are null or empty string. throws ArrayStoreException If {@code signature} is not an array of instances of a subclass of {@code MBeanParameterInfo}. this(name, description, signature, (Descriptor) null);
public OpenMBeanConstructorInfoSupport(String name, String description, OpenMBeanParameterInfo[] signature, Descriptor descriptor) Constructs an {@code OpenMBeanConstructorInfoSupport} instance, which describes the constructor of a class of open MBeans with the specified {@code name}, {@code description}, {@code signature}, and {@code descriptor}. The {@code signature} array parameter is internally copied, so that subsequent changes to the array referenced by {@code signature} have no effect on this instance. param name cannot be a null or empty string. param description cannot be a null or empty string. param signature can be null or empty if there are no parameters to describe. param descriptor The descriptor for the constructor. This may be null which is equivalent to an empty descriptor. throws IllegalArgumentException if {@code name} or {@code description} are null or empty string. throws ArrayStoreException If {@code signature} is not an array of instances of a subclass of {@code MBeanParameterInfo}. since 1.6 super(name, description, arrayCopyCast(signature), // may throw an ArrayStoreException descriptor); // check parameters that should not be null or empty // (unfortunately it is not done in superclass :-( ! ) // if (name == null || name.trim().equals("")) { throw new IllegalArgumentException("Argument name cannot be " + "null or empty"); } if (description == null || description.trim().equals("")) { throw new IllegalArgumentException("Argument description cannot " + "be null or empty"); }

Methods Summary
private static javax.management.MBeanParameterInfo[]	arrayCopyCast(javax.management.openmbean.OpenMBeanParameterInfo[] src) if (src == null) return null; MBeanParameterInfo[] dst = new MBeanParameterInfo[src.length]; System.arraycopy(src, 0, dst, 0, src.length); // may throw an ArrayStoreException return dst;
public boolean	equals(java.lang.Object obj) Compares the specified {@code obj} parameter with this {@code OpenMBeanConstructorInfoSupport} instance for equality. Returns {@code true} if and only if all of the following statements are true: {@code obj} is non null, {@code obj} also implements the {@code OpenMBeanConstructorInfo} interface, their names are equal their signatures are equal. This ensures that this {@code equals} method works properly for {@code obj} parameters which are different implementations of the {@code OpenMBeanConstructorInfo} interface. param obj the object to be compared for equality with this {@code OpenMBeanConstructorInfoSupport} instance; return {@code true} if the specified object is equal to this {@code OpenMBeanConstructorInfoSupport} instance. // if obj is null, return false // if (obj == null) { return false; } // if obj is not a OpenMBeanConstructorInfo, return false // OpenMBeanConstructorInfo other; try { other = (OpenMBeanConstructorInfo) obj; } catch (ClassCastException e) { return false; } // Now, really test for equality between this // OpenMBeanConstructorInfo implementation and the other: // // their Name should be equal if ( ! this.getName().equals(other.getName()) ) { return false; } // their Signatures should be equal if ( ! Arrays.equals(this.getSignature(), other.getSignature()) ) { return false; } // All tests for equality were successfull // return true;
public int	hashCode() Returns the hash code value for this {@code OpenMBeanConstructorInfoSupport} instance. The hash code of an {@code OpenMBeanConstructorInfoSupport} instance is the sum of the hash codes of all elements of information used in {@code equals} comparisons (ie: its name and signature, where the signature hashCode is calculated by a call to {@code java.util.Arrays.asList(this.getSignature).hashCode()}). This ensures that {@code t1.equals(t2)} implies that {@code t1.hashCode()==t2.hashCode()} for any two {@code OpenMBeanConstructorInfoSupport} instances {@code t1} and {@code 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 {@code OpenMBeanConstructorInfo} interface may be equal to this {@code OpenMBeanConstructorInfoSupport} instance as defined by {@link #equals(java.lang.Object)}, but may have a different hash code if it is calculated differently. As {@code OpenMBeanConstructorInfoSupport} instances are immutable, the hash code for this instance is calculated once, on the first call to {@code hashCode}, and then the same value is returned for subsequent calls. return the hash code value for this {@code OpenMBeanConstructorInfoSupport} instance // 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.getName().hashCode(); value += Arrays.asList(this.getSignature()).hashCode(); myHashCode = new Integer(value); } // return always the same hash code for this instance (immutable) // return myHashCode.intValue();
public java.lang.String	toString() Returns a string representation of this {@code OpenMBeanConstructorInfoSupport} instance. The string representation consists of the name of this class (ie {@code javax.management.openmbean.OpenMBeanConstructorInfoSupport}), the name and signature of the described constructor and the string representation of its descriptor. As {@code OpenMBeanConstructorInfoSupport} instances are immutable, the string representation for this instance is calculated once, on the first call to {@code toString}, and then the same value is returned for subsequent calls. return a string representation of this {@code OpenMBeanConstructorInfoSupport} instance // Calculate the string value if it has not yet been done (ie // 1st call to toString()) // if (myToString == null) { myToString = new StringBuffer() .append(this.getClass().getName()) .append("(name=") .append(this.getName()) .append(",signature=") .append(Arrays.asList(this.getSignature()).toString()) .append(",descriptor=") .append(this.getDescriptor()) .append(")") .toString(); } // return always the same string representation for this // instance (immutable) // return myToString;