org.jboss.util.stream: public class: CustomObjectInputStreamWithClassloader

org.jboss.util.stream
public class: CustomObjectInputStreamWithClassloader [javadoc | source]

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

All Implemented Interfaces:
ObjectStreamConstants, ObjectInput, Closeable

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.

author: < - a href="mailto:rickard@dreambean.com">Rickard Oberg

author: < - a href="mailto:reverbel@ime.usp.br">Francisco Reverbel

version: $ - Revision: 37459 $

Field Summary
ClassLoader	cl	The classloader to use when the default classloader cannot find the classes in the stream.

Constructor:

Constructor:
public CustomObjectInputStreamWithClassloader(InputStream in, ClassLoader cl) throws IOException { super(in); this.cl = cl; } Constructs a new instance with the given classloader and input stream. Parameters: `in` - stream to read objects from `cl` - classloader to use

 public CustomObjectInputStreamWithClassloader(InputStream in,
    ClassLoader cl) throws IOException {
      super(in);
      this.cl = cl;
}

Constructs a new instance with the given classloader and input stream.

Parameters:

in - stream to read objects from

cl - classloader to use

Method from org.jboss.util.stream.CustomObjectInputStreamWithClassloader Summary:
readClassDescriptor, resolveClass, resolveProxyClass

Methods from java.io.ObjectInputStream:
available, close, defaultReadObject, read, read, readBoolean, readByte, readChar, readDouble, readFields, readFloat, readFully, readFully, readInt, readLine, readLong, readObject, readShort, readUTF, readUnshared, readUnsignedByte, readUnsignedShort, registerValidation, skipBytes

Methods from java.io.InputStream:
available, close, mark, markSupported, read, read, read, reset, skip

Methods from java.lang.Object:
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from org.jboss.util.stream.CustomObjectInputStreamWithClassloader Detail:
protected ObjectStreamClass readClassDescriptor() throws ClassNotFoundException, IOException { return ObjectStreamClass.lookup(cl.loadClass(readUTF())); } Reads just the class name from this input stream.
protected Class resolveClass(ObjectStreamClass classdesc) throws ClassNotFoundException, IOException { return cl.loadClass(classdesc.getName()); } 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.
protected Class resolveProxyClass(String[] interfaces) throws ClassNotFoundException, IOException { Class[] interfacesClass = new Class[interfaces.length]; for( int i=0; i< interfaces.length; i++ ) { interfacesClass[i] = Class.forName(interfaces[i], false, cl); } return Proxy.getProxyClass(cl, interfacesClass); } Resolves the proxy class for the specified array of interfaces.

Method from org.jboss.util.stream.CustomObjectInputStreamWithClassloader Detail:

 protected ObjectStreamClass readClassDescriptor() throws ClassNotFoundException, IOException {
      return ObjectStreamClass.lookup(cl.loadClass(readUTF()));
}

Reads just the class name from this input stream.

 protected Class resolveClass(ObjectStreamClass classdesc) throws ClassNotFoundException, IOException {
      return cl.loadClass(classdesc.getName());
}

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.

 protected Class resolveProxyClass(String[] interfaces) throws ClassNotFoundException, IOException {
      
      Class[] interfacesClass = new Class[interfaces.length];
      for( int i=0; i<  interfaces.length; i++ ) {
         interfacesClass[i] = Class.forName(interfaces[i], false, cl);
      }
      return Proxy.getProxyClass(cl, interfacesClass);
}

Resolves the proxy class for the specified array of interfaces.