Package net.sf.jguiraffe.di.impl
Interface Invokable
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- All Known Implementing Classes:
ChainedInvocation,ConstructorInvocation,HelperInvocations,MethodInvocation,NullInvocation,SetPropertyInvocation
public interface InvokableDefinition of an interface for objects that perform some kind of method invocation.
This interface allows handling of different invocations (e.g. constructor invocation, method invocation, etc.) in a generic way. It defines an
invoke()method with a generic signature. It also demands that invokable objects must be able to return a list of dependencies they require.- Version:
- $Id: Invokable.java 205 2012-01-29 18:29:57Z oheger $
- Author:
- Oliver Heger
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description List<Dependency>getParameterDependencies()Returns a list with all dependencies required for this invocation.Objectinvoke(DependencyProvider depProvider, Object target)Performs the invocation.
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Method Detail
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getParameterDependencies
List<Dependency> getParameterDependencies()
Returns a list with all dependencies required for this invocation. Typically these dependencies define the parameters for the method call to be performed.- Returns:
- a list with the dependencies required by this invocation
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invoke
Object invoke(DependencyProvider depProvider, Object target)
Performs the invocation. This is the main method of anInvokableobject, which actually executes a method. The passed in parameters should satisfy all requirements of an arbitrary invocation. Some of them may not be needed for a concrete invocation (e.g. a constructor invocation does not require a target object).- Parameters:
depProvider- the dependency provider, which can be used for resolving the parameter dependenciestarget- the target object, on which the invocation should be performed- Returns:
- the result of the invocation
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