bees.core
Class CapabilityStreamer

java.lang.Object
  |
  +--bees.core.CapabilityStreamer

public final class CapabilityStreamer

extends java.lang.Object

Helper class used to encode and decode capabilities to data streams. Warning: This can be used to reveal a capabilities private data, it must not be exported to untrusted code.

Constructor Summary

CapabilityStreamer(KernelObjectStore store)
Construct a CapabilityStreamer that can read/write capabilities from the given store.

Method Summary

java.lang.Object	read(java.io.DataInputStream is) Read a capability from the given input stream.
java.lang.String	toString()
void	write(Capability cap, java.io.DataOutputStream os) Write a capability to the given output stream.

Methods inherited from class java.lang.Object

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

Constructor Detail

CapabilityStreamer

public CapabilityStreamer(KernelObjectStore store)

Construct a CapabilityStreamer that can read/write capabilities from the given store.

Parameters:

store - The KernelObjectStore used to hold KernelObjects.

Method Detail

read

public java.lang.Object read(java.io.DataInputStream is)
                      throws java.lang.ClassNotFoundException,
                             java.lang.InstantiationException,
                             java.lang.IllegalAccessException,
                             java.io.IOException

Read a capability from the given input stream.

Parameters:

is - The DataInputStream used to read capabilities.

Returns:

The manufactured capability.

Throws:

java.lang.ClassNotFoundException - if the Capability class couldn't be found.

java.lang.InstantiationException - if there was a problem instantiating the capability object.

java.lang.IllegalAccessException - if there was a problem accessing the capability's constructor method.

java.io.IOException - if there was a problem reading the flattened version of the capability.

write

public void write(Capability cap,
                  java.io.DataOutputStream os)
           throws java.io.IOException

Write a capability to the given output stream.

Parameters:

cap - The capability to write to the stream.

os - The DataOutputStream used to write capabilities.

Throws:

java.io.IOException - if there was a problem reading the flattened version of the capability.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()