org.jbpm.util
Class CustomLoaderObjectInputStream

java.lang.Object
  java.io.InputStream
      java.io.ObjectInputStream
          org.jbpm.util.CustomLoaderObjectInputStream

All Implemented Interfaces:

Closeable, DataInput, ObjectInput, ObjectStreamConstants

public class CustomLoaderObjectInputStream
extends ObjectInputStream

Specialized object input stream that allows classes to be fetched through a custom class loader if the stream is unable to resolve them in the usual manner.

Author:

Alejandro Guizar

Nested Class Summary

Nested classes/interfaces 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_ENUM, 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_ENUM, TC_EXCEPTION, TC_LONGSTRING, TC_MAX, TC_NULL, TC_OBJECT, TC_PROXYCLASSDESC, TC_REFERENCE, TC_RESET, TC_STRING

Constructor Summary

protected	CustomLoaderObjectInputStream() Provide a way for subclasses to not have to allocate private data just used by the platform's implementation of ObjectInputStream.
	CustomLoaderObjectInputStream(InputStream in) Creates a CustomLoaderObjectInputStream that reads from the specified input stream and resolves classes using the context class loader.
	CustomLoaderObjectInputStream(InputStream in, ClassLoader customLoader) Creates a CustomLoaderObjectInputStream that reads from the specified input stream and resolves classes using the given class loader.

Method Summary

ClassLoader	getCustomLoader() Returns the loader used by this stream for resolving classes.
protected Class	resolveClass(ObjectStreamClass desc)
protected Class	resolveProxyClass(String[] interfaces)

Methods inherited from class java.io.ObjectInputStream

available, close, defaultReadObject, enableResolveObject, read, read, readBoolean, readByte, readChar, readClassDescriptor, 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

CustomLoaderObjectInputStream

protected CustomLoaderObjectInputStream()
                                 throws IOException

Provide a way for subclasses to not have to allocate private data just used by the platform's implementation of ObjectInputStream.

Throws:

IOException - if an I/O error occurs

CustomLoaderObjectInputStream

public CustomLoaderObjectInputStream(InputStream in)
                              throws IOException

Creates a CustomLoaderObjectInputStream that reads from the specified input stream and resolves classes using the context class loader.

Parameters:

in - input stream to read from

Throws:

IOException - if an I/O error occurs while reading stream header

SecurityException - if untrusted subclass illegally overrides security-sensitive methods; note that this class does not override said methods

CustomLoaderObjectInputStream

public CustomLoaderObjectInputStream(InputStream in,
                                     ClassLoader customLoader)
                              throws IOException

Creates a CustomLoaderObjectInputStream that reads from the specified input stream and resolves classes using the given class loader.

Parameters:

in - input stream to read from

customLoader - the loader to use for resolving classes

Throws:

IOException - if an I/O error occurs while reading stream header

IllegalArgumentException - if customLoader is null

SecurityException - if untrusted subclass illegally overrides security-sensitive methods; note that this class does not override said methods

Method Detail

getCustomLoader

public ClassLoader getCustomLoader()

Returns the loader used by this stream for resolving classes.

resolveClass

protected Class resolveClass(ObjectStreamClass desc)
                      throws IOException,
                             ClassNotFoundException

Overrides:

resolveClass in class ObjectInputStream

Throws:

IOException

ClassNotFoundException

resolveProxyClass

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

Overrides:

resolveProxyClass in class ObjectInputStream

Throws:

IOException

ClassNotFoundException