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gnu.javax.net.ssl.provider
Class ProtocolVersion  view ProtocolVersion download ProtocolVersion.java

java.lang.Object
  extended bygnu.javax.net.ssl.provider.ProtocolVersion
All Implemented Interfaces:
java.lang.Comparable, Constructed

final class ProtocolVersion
extends java.lang.Object
implements java.lang.Comparable, Constructed


Field Summary
private  int major
           
private  int minor
           
(package private) static ProtocolVersion SSL_3
           
(package private) static ProtocolVersion TLS_1
           
(package private) static ProtocolVersion TLS_1_1
           
 
Constructor Summary
private ProtocolVersion(int major, int minor)
           
 
Method Summary
 int compareTo(java.lang.Object o)
          Compares this object with another, and returns a numerical result based on the comparison.
 boolean equals(java.lang.Object o)
          Determine whether this Object is semantically equal to another Object.
(package private)  byte[] getEncoded()
           
(package private) static ProtocolVersion getInstance(int major, int minor)
           
(package private)  int getMajor()
           
(package private)  int getMinor()
           
 int hashCode()
          Get a value that represents this Object, as uniquely as possible within the confines of an int.
(package private) static ProtocolVersion read(java.io.InputStream in)
           
 java.lang.String toString()
          Convert this Object to a human-readable String.
 void write(java.io.OutputStream out)
          Writes this structure's encoded form to the given output stream.
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 

Field Detail

SSL_3

static final ProtocolVersion SSL_3

TLS_1

static final ProtocolVersion TLS_1

TLS_1_1

static final ProtocolVersion TLS_1_1

major

private final int major

minor

private final int minor
Constructor Detail

ProtocolVersion

private ProtocolVersion(int major,
                        int minor)
Method Detail

read

static ProtocolVersion read(java.io.InputStream in)
                     throws java.io.IOException

getInstance

static ProtocolVersion getInstance(int major,
                                   int minor)

write

public void write(java.io.OutputStream out)
           throws java.io.IOException
Description copied from interface: Constructed
Writes this structure's encoded form to the given output stream.

Specified by:
write in interface Constructed

getEncoded

byte[] getEncoded()

getMajor

int getMajor()

getMinor

int getMinor()

equals

public boolean equals(java.lang.Object o)
Description copied from class: java.lang.Object
Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

  • It must be transitive. If a.equals(b) and b.equals(c), then a.equals(c) must be true as well.
  • It must be symmetric. a.equals(b) and b.equals(a) must have the same value.
  • It must be reflexive. a.equals(a) must always be true.
  • It must be consistent. Whichever value a.equals(b) returns on the first invocation must be the value returned on all later invocations.
  • a.equals(null) must be false.
  • It must be consistent with hashCode(). That is, a.equals(b) must imply a.hashCode() == b.hashCode(). The reverse is not true; two objects that are not equal may have the same hashcode, but that has the potential to harm hashing performance.

This is typically overridden to throw a java.lang.ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a java.lang.NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, java.util.IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.


hashCode

public int hashCode()
Description copied from class: java.lang.Object
Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

  • Semantic equality implies identical hashcodes. In other words, if a.equals(b) is true, then a.hashCode() == b.hashCode() must be as well. However, the reverse is not necessarily true, and two objects may have the same hashcode without being equal.
  • It must be consistent. Whichever value o.hashCode() returns on the first invocation must be the value returned on all later invocations as long as the object exists. Notice, however, that the result of hashCode may change between separate executions of a Virtual Machine, because it is not invoked on the same object.

Notice that since hashCode is used in java.util.Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)


compareTo

public int compareTo(java.lang.Object o)
Description copied from interface: java.lang.Comparable
Compares this object with another, and returns a numerical result based on the comparison. If the result is negative, this object sorts less than the other; if 0, the two are equal, and if positive, this object sorts greater than the other. To translate this into boolean, simply perform o1.compareTo(o2) <op> 0, where op is one of <, <=, =, !=, >, or >=.

You must make sure that the comparison is mutual, ie. sgn(x.compareTo(y)) == -sgn(y.compareTo(x)) (where sgn() is defined as -1, 0, or 1 based on the sign). This includes throwing an exception in either direction if the two are not comparable; hence, compareTo(null) should always throw an Exception.

You should also ensure transitivity, in two forms: x.compareTo(y) > 0 && y.compareTo(z) > 0 implies x.compareTo(z) > 0; and x.compareTo(y) == 0 implies x.compareTo(z) == y.compareTo(z).

Specified by:
compareTo in interface java.lang.Comparable

toString

public java.lang.String toString()
Description copied from class: java.lang.Object
Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).