CustomObjectInputStreamWithClassloader (JBoss IIOP Plugin API) - JBoss 3.2.7 iiop API Documentation 英文版文档

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org.jboss.util.stream
Class CustomObjectInputStreamWithClassloader

java.lang.Object
  java.io.InputStream
      java.io.ObjectInputStream
          org.jboss.util.stream.CustomObjectInputStreamWithClassloader

All Implemented Interfaces:: DataInput, ObjectInput, ObjectStreamConstants

public class CustomObjectInputStreamWithClassloader
extends ObjectInputStream

Customized object input stream that

redefines readClassDescriptor() in order to read a short class descriptor (just the class name) when deserializing an object
takes a class loader in its constructor and uses it to retrieve the class definitions.

Version:: $Revision: 1.1 $
Author:: Rickard Oberg, Francisco Reverbel

Nested Class Summary

Nested classes inherited from class java.io.ObjectInputStream

ObjectInputStream.GetField

Field Summary

Fields inherited from interface java.io.ObjectStreamConstants

baseWireHandle, PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, SC_BLOCK_DATA, SC_EXTERNALIZABLE, SC_SERIALIZABLE, SC_WRITE_METHOD, STREAM_MAGIC, STREAM_VERSION, SUBCLASS_IMPLEMENTATION_PERMISSION, SUBSTITUTION_PERMISSION, TC_ARRAY, TC_BASE, TC_BLOCKDATA, TC_BLOCKDATALONG, TC_CLASS, TC_CLASSDESC, TC_ENDBLOCKDATA, TC_EXCEPTION, TC_LONGSTRING, TC_MAX, TC_NULL, TC_OBJECT, TC_PROXYCLASSDESC, TC_REFERENCE, TC_RESET, TC_STRING

Constructor Summary

CustomObjectInputStreamWithClassloader(InputStream in, ClassLoader cl)
          Constructs a new instance with the given classloader and input stream.

Method Summary

protected ObjectStreamClass readClassDescriptor()
          Reads just the class name from this input stream.

protected Class resolveClass(ObjectStreamClass classdesc)
          Resolves the class described in the classdesc parameter.

protected Class resolveProxyClass(String[] interfaces)
          Resolves the proxy class for the specified array of interfaces.

Methods inherited from class java.io.ObjectInputStream

available, close, defaultReadObject, enableResolveObject, read, read, readBoolean, readByte, readChar, readDouble, readFields, readFloat, readFully, readFully, readInt, readLine, readLong, readObject, readObjectOverride, readShort, readStreamHeader, readUnshared, readUnsignedByte, readUnsignedShort, readUTF, registerValidation, resolveObject, skipBytes

Methods inherited from class java.io.InputStream

mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.io.ObjectInput

read, skip

Constructor Detail

CustomObjectInputStreamWithClassloader

public CustomObjectInputStreamWithClassloader(InputStream in,
                                              ClassLoader cl)
                                       throws IOException

Constructs a new instance with the given classloader and input stream.
Parameters:: in - stream to read objects from; cl - classloader to use

Method Detail

readClassDescriptor

protected ObjectStreamClass readClassDescriptor()
                                         throws IOException,
                                                ClassNotFoundException

Reads just the class name from this input stream.

Returns:: a class description object
Throws:: IOException; ClassNotFoundException

resolveClass

protected Class resolveClass(ObjectStreamClass classdesc)
                      throws IOException,
                             ClassNotFoundException

Resolves the class described in the classdesc parameter. First, try the default classloader (implemented by the super class). If it cannot load the class, try the classloader given to this instance.

Parameters:: classdesc - class description object
Returns:: the Class corresponding to class description
Throws:: IOException - if an I/O error occurs; ClassNotFoundException - if the class cannot be found by the classloader

resolveProxyClass

protected Class resolveProxyClass(String[] interfaces)
                           throws IOException,
                                  ClassNotFoundException

Resolves the proxy class for the specified array of interfaces.

Parameters:: interfaces - an array of interfaces
Returns:: the proxy class
Throws:: IOException - if an I/O error occurs; ClassNotFoundException - if the class cannot be found by the classloader