Package org.apache.cayenne.util
Class Invocation
java.lang.Object
org.apache.cayenne.util.Invocation
public class Invocation extends Object
Invocation represents a dynamic method invocation bound to a specific target. The
 target is kept with a WeakReference and can therefore be reclaimed by the Garbage
 Collector.
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Constructor SummaryConstructors Constructor Description Invocation(Object target, String methodName)Constructor for an Invocation without arguments in the target's method.Invocation(Object target, String methodName, Class parameterType)Constructor for an Invocation with a single argument in the target's method.Invocation(Object target, String methodName, Class[] parameterTypes)Constructor for an Invocation with arbitrary arguments in the target's method.
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Method SummaryModifier and Type Method Description booleanequals(Object obj)booleanfire()Invoke the target's method without any arguments.booleanfire(Object argument)Invoke the target's method with a single argument.booleanfire(Object[] arguments)Invoke the target's method with an arbitrary number of arguments.MethodgetMethod()Class[]getParameterTypes()ObjectgetTarget()inthashCode()
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Constructor Details- 
InvocationConstructor for an Invocation without arguments in the target's method.- Throws:
- NoSuchMethodException
- See Also:
- Invocation(Object, String, Class[])
 
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Invocationpublic Invocation(Object target, String methodName, Class parameterType) throws NoSuchMethodExceptionConstructor for an Invocation with a single argument in the target's method.- Throws:
- NoSuchMethodException
- See Also:
- Invocation(Object, String, Class[])
 
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Invocationpublic Invocation(Object target, String methodName, Class[] parameterTypes) throws NoSuchMethodExceptionConstructor for an Invocation with arbitrary arguments in the target's method.- Parameters:
- target-
- methodName-
- parameterTypes-
- Throws:
- NoSuchMethodException- if- methodNamecould not be found in the target
- IllegalArgumentException- if target or methodName are- null, or parameterTypes is empty or contains- nullelements
 
 
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Method Details- 
firepublic boolean fire()Invoke the target's method without any arguments.- See Also:
- fire(Object[])
 
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fireInvoke the target's method with a single argument.- Parameters:
- argument- an object passed to the target's method
- See Also:
- fire(Object[])
 
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fireInvoke the target's method with an arbitrary number of arguments. The number of arguments must be consistent with the arguments given at construction time of this Invocation.- Parameters:
- arguments- an array of objects passed to the target's method
- Returns:
- trueif invocation of the method succeeded, otherwise- false.
- Throws:
- IllegalArgumentException- if the passed arguments are inconsistent with the arguments passed to this instance's constructor
- See Also:
- fire(Object[])
 
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equals- Overrides:
- equalsin class- Object
- See Also:
- Object.equals(java.lang.Object)
 
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hashCodepublic int hashCode()- Overrides:
- hashCodein class- Object
- See Also:
- Object.hashCode()
 
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getMethod- Returns:
- the method to be invoked on the target
 
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getTarget- Returns:
- the target object of this Invocation
 
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getParameterTypes- Returns:
- an array of Classes describing the target method's parameters
 
 
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