Package org.aopalliance.intercept
Interface ConstructorInterceptor
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- All Superinterfaces:
Advice
,Interceptor
public interface ConstructorInterceptor extends Interceptor
Intercepts the construction of a new object.The user should implement the
construct(ConstructorInvocation)
method to modify the original behavior. E.g. the following class implements a singleton interceptor (allows only one unique instance for the intercepted class):class DebuggingInterceptor implements ConstructorInterceptor { Object instance=null; Object construct(ConstructorInvocation i) throws Throwable { if(instance==null) { return instance=i.proceed(); } else { throw new Exception("singleton does not allow multiple instance"); } } }
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description java.lang.Object
construct(ConstructorInvocation invocation)
Implement this method to perform extra treatments before and after the consrution of a new object.
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Method Detail
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construct
java.lang.Object construct(ConstructorInvocation invocation) throws java.lang.Throwable
Implement this method to perform extra treatments before and after the consrution of a new object. Polite implementations would certainly like to invokeJoinpoint.proceed()
.- Parameters:
invocation
- the construction joinpoint- Returns:
- the newly created object, which is also the result of
the call to
Joinpoint.proceed()
, might be replaced by the interceptor. - Throws:
java.lang.Throwable
- if the interceptors or the target-object throws an exception.
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