FIM.Util
Class ClassLoaderObjectInputStream

java.lang.Object
  |
  +--java.io.InputStream
        |
        +--java.io.ObjectInputStream
              |
              +--FIM.Util.ClassLoaderObjectInputStream

All Implemented Interfaces:

DataInput, ObjectInput, ObjectStreamConstants

public class ClassLoaderObjectInputStream

extends ObjectInputStream

A stream defining the classes which are deserialized not through the standard classloader but a classloader specified by the user.

Version:

1.0, 1.7.2000

Author:

Michael Sonntag

Inner classes inherited from class java.io.ObjectInputStream

ObjectInputStream.GetField, ObjectInputStream.GetFieldImpl

Fields inherited from class java.io.ObjectInputStream

classdesc, classes, enableResolve, spClass

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

ClassLoaderObjectInputStream(InputStream in)
Create an ClassLoaderObjectInputStream that reads from the specified InputStream.

Method Summary

ClassLoader	getClassLoader() Returns the classloader used for laoding the classes in this stream.
Class	resolveClass(ObjectStreamClass v) Load the local class equivalent of the specified stream class description.
void	setClassLoader(ClassLoader classLoader) Sets the classloader through which to load the classes.

Methods inherited from class java.io.ObjectInputStream

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

Methods inherited from interface java.io.ObjectStreamConstants

Constructor Detail

ClassLoaderObjectInputStream

public ClassLoaderObjectInputStream(InputStream in)
                             throws IOException,
                                    StreamCorruptedException

Create an ClassLoaderObjectInputStream that reads from the specified InputStream.

Parameters:

in - the underlying InputStream

Throws:

StreamCorruptedException - if the version or magic number are incorrect.

IOException - if an exception occurred in the underlying stream.

Method Detail

setClassLoader

public final void setClassLoader(ClassLoader classLoader)

Sets the classloader through which to load the classes.

Parameters:

classLoader - the classloader to use when creating objects

getClassLoader

public final ClassLoader getClassLoader()

Returns the classloader used for laoding the classes in this stream. Necessary for SignedMessage; it must load the contained class through the classloader it loads itself

Throws:

SecurityException - if the caller has no permission to access a classloader (RuntimePermission("getClassLoader"))

See Also:

SignedMessage

resolveClass

public Class resolveClass(ObjectStreamClass v)
                   throws IOException,
                          ClassNotFoundException

Load the local class equivalent of the specified stream class description. This method will be invoked only once for each unique class in the stream. Once returned, the serialVersionUID of the class is compared to the serialVersionUID of the serialized class. If there is a mismatch, the deserialization fails and an exception is raised.

Overrides:

resolveClass in class ObjectInputStream

Parameters:

v - The definition of the class to resolve (serialized information)

Throws:

ClassNotFoundException - If the class of a serialized object cannot be found.