org.apache.felix.ipojo.handlers.dependency

Class DependencyCallback

java.lang.Object

org.apache.felix.ipojo.util.Callback

org.apache.felix.ipojo.handlers.dependency.DependencyCallback

public class DependencyCallback
extends Callback

This class allwos the creation of callback when service dependency arrives or disappear.

Author:

Felix Project Team

Field Summary

Fields

Modifier and Type	Field and Description
static int	BIND Bind method (called when a service arrives).
static int	MODIFIED Updated method (called when a service is modified).
static int	UNBIND Unbind method (called when a service disappears).

Fields inherited from class org.apache.felix.ipojo.util.Callback

m_methodObj

Constructor Summary

Constructors

Constructor and Description
DependencyCallback(Dependency dep, java.lang.String method, int methodType) Constructor.

Method Summary

Modifier and Type	Method and Description
protected void	call(org.osgi.framework.ServiceReference ref, java.lang.Object obj) Call the callback method with a service reference.
protected void	callOnInstance(java.lang.Object instance, org.osgi.framework.ServiceReference ref, java.lang.Object obj) Call the callback on the given instance with the given argument.
java.lang.String	getMethodName()
int	getMethodType()
protected void	searchMethod() Search the method object in the POJO by analyzing present method.
void	setArgument(java.lang.String[] arg) Set the argument type (Empty or the class name).

Methods inherited from class org.apache.felix.ipojo.util.Callback

call, call, call, call, getArguments, getMethod

Methods inherited from class java.lang.Object

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

Field Detail

BIND

public static final int BIND

Bind method (called when a service arrives).

See Also:

Constant Field Values

UNBIND

public static final int UNBIND

Unbind method (called when a service disappears).

See Also:

Constant Field Values

MODIFIED

public static final int MODIFIED

Updated method (called when a service is modified).

See Also:

Constant Field Values

Constructor Detail

DependencyCallback

public DependencyCallback(Dependency dep,
                          java.lang.String method,
                          int methodType)

Constructor.

Parameters:

dep - : the dependency attached to this dependency callback

method - : the method to call

methodType - : is the method to call a bind method or an unbind method

Method Detail

getMethodType

public int getMethodType()

getMethodName

public java.lang.String getMethodName()

setArgument

public void setArgument(java.lang.String[] arg)

Set the argument type (Empty or the class name).

Parameters:

arg - : the array of argument types.

searchMethod

protected void searchMethod()

Search the method object in the POJO by analyzing present method. If not found in the pojo it tests the parent classes. The name of the method and the argument type are checked.

Overrides:

searchMethod in class Callback

call

protected void call(org.osgi.framework.ServiceReference ref,
                    java.lang.Object obj)
             throws java.lang.NoSuchMethodException,
                    java.lang.IllegalAccessException,
                    java.lang.reflect.InvocationTargetException

Call the callback method with a service reference.

Parameters:

ref - : the service reference to send to the method

obj - : the service object

Throws:

java.lang.NoSuchMethodException - : Method is not found in the class

java.lang.reflect.InvocationTargetException - : The method is not static

java.lang.IllegalAccessException - : The method can not be invoked

callOnInstance

protected void callOnInstance(java.lang.Object instance,
                              org.osgi.framework.ServiceReference ref,
                              java.lang.Object obj)
                       throws java.lang.NoSuchMethodException,
                              java.lang.IllegalAccessException,
                              java.lang.reflect.InvocationTargetException

Call the callback on the given instance with the given argument.

Parameters:

instance - : the instance on which call the callback

ref - : the service reference to send to the callback

obj - : the service object

Throws:

java.lang.NoSuchMethodException - : the method is not found

java.lang.IllegalAccessException - : the method could not be called

java.lang.reflect.InvocationTargetException - : an error happens in the called method