Package org.apache.commons.io.channels

Class CloseShieldChannelHandler

java.lang.Object

org.apache.commons.io.channels.CloseShieldChannelHandler

All Implemented Interfaces:

InvocationHandler

final class CloseShieldChannelHandler
extends Object
implements InvocationHandler

An InvocationHandler supporting the implementation of CloseShieldChannel.

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	closed
private final Channel	delegate
private static final Set<Class<? extends Channel>>	SUPPORTED_INTERFACES

Constructor Summary

Constructors

Constructor	Description
CloseShieldChannelHandler(Channel delegate)

Method Summary

Modifier and Type	Method	Description
Object	invoke(Object proxy, Method method, Object[] args)
private Object	invokeObjectMethod(Object proxy, Method method, Object[] args)
private static boolean	isAllowedAfterClose(Class<?> declaringClass, String name, int parameterCount)	Tests whether the given method is allowed to be called after the shield is closed.
(package private) static boolean	isSupported(Class<?> interfaceClass)
private static boolean	returnsThis(Class<?> declaringClass, String name, int parameterCount)	Tests whether the given method returns 'this' (the channel) as per JDK spec.

Methods inherited from class java.lang.Object

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

Field Details

SUPPORTED_INTERFACES

private static final Set<Class<? extends Channel>> SUPPORTED_INTERFACES

delegate

private final Channel delegate

closed

private volatile boolean closed

Constructor Details

CloseShieldChannelHandler

CloseShieldChannelHandler(Channel delegate)

Method Details

isAllowedAfterClose

private static boolean isAllowedAfterClose(Class<?> declaringClass,
 String name,
 int parameterCount)

Tests whether the given method is allowed to be called after the shield is closed.

Parameters:

declaringClass - The class declaring the method.

name - The method name.

parameterCount - The number of parameters.

Returns:

true if the method is allowed after close(), false otherwise.

isSupported

static boolean isSupported(Class<?> interfaceClass)

returnsThis

private static boolean returnsThis(Class<?> declaringClass,
 String name,
 int parameterCount)

Tests whether the given method returns 'this' (the channel) as per JDK spec.

Parameters:

declaringClass - The class declaring the method.

name - The method name.

parameterCount - The number of parameters.

Returns:

true if the method returns 'this', false otherwise.

invoke

public Object invoke(Object proxy,
 Method method,
 Object[] args)
              throws Throwable

Specified by:

invoke in interface InvocationHandler

Throws:

Throwable

invokeObjectMethod

private Object invokeObjectMethod(Object proxy,
 Method method,
 Object[] args)