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

java.lang.Object
  extended bygnu.javax.net.ssl.provider.ContentType
All Implemented Interfaces:
Enumerated

final class ContentType
extends java.lang.Object
implements Enumerated

The content type enumeration, which marks packets in the record layer.

enum { change_cipher_spec(20), alert(21), handshake(22),
             application_data(23), (255) } ContentType;


Field Summary
(package private) static ContentType ALERT
           
(package private) static ContentType APPLICATION_DATA
           
(package private) static ContentType CHANGE_CIPHER_SPEC
           
(package private) static ContentType CLIENT_HELLO_V2
           
(package private) static ContentType HANDSHAKE
           
private  int value
           
 
Constructor Summary
private ContentType(int value)
           
 
Method Summary
 boolean equals(java.lang.Object o)
          Determine whether this Object is semantically equal to another Object.
 byte[] getEncoded()
          Returns the encoded value of this enumerated value, which is appropriate to send over-the-wire.
 int getValue()
          Returns the numeric value of this enumerated value.
 int hashCode()
          Get a value that represents this Object, as uniquely as possible within the confines of an int.
(package private) static ContentType read(java.io.InputStream in)
           
 java.lang.String toString()
          Returns a string representation of this enumerated value.
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 

Field Detail

CLIENT_HELLO_V2

static final ContentType CLIENT_HELLO_V2

CHANGE_CIPHER_SPEC

static final ContentType CHANGE_CIPHER_SPEC

ALERT

static final ContentType ALERT

HANDSHAKE

static final ContentType HANDSHAKE

APPLICATION_DATA

static final ContentType APPLICATION_DATA

value

private int value
Constructor Detail

ContentType

private ContentType(int value)
Method Detail

read

static final ContentType read(java.io.InputStream in)
                       throws java.io.IOException

getEncoded

public byte[] getEncoded()
Description copied from interface: Enumerated
Returns the encoded value of this enumerated value, which is appropriate to send over-the-wire.

Specified by:
getEncoded in interface Enumerated

getValue

public int getValue()
Description copied from interface: Enumerated
Returns the numeric value of this enumerated value.

Specified by:
getValue in interface Enumerated

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)


toString

public java.lang.String toString()
Description copied from interface: Enumerated
Returns a string representation of this enumerated value.

Specified by:
toString in interface Enumerated