Java Doc for MethodUtils.java in  » Library » Apache-commons-beanutils-1.8.0-BETA-src » org » apache » commons » beanutils » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Utility reflection methods focussed on methods in general rather than properties in particular.

Known Limitations

Accessing Public Methods In A Default Access Superclass

There is an issue when invoking public methods contained in a default access superclass. Reflection locates these methods fine and correctly assigns them as public. However, an IllegalAccessException is thrown if the method is invoked.

MethodUtils contains a workaround for this situation. It will attempt to call setAccessible on this method. If this call succeeds, then the method can be invoked as normal. This call will only succeed when the application has sufficient security privilages. If this call fails then a warning will be logged and the method may fail.

Return an accessible method (that is, one that can be invoked via reflection) with given name and a single parameter.

Return an accessible method (that is, one that can be invoked via reflection) with given name and parameters.

Return an accessible method (that is, one that can be invoked via reflection) that implements the specified Method.

Find an accessible method that matches the given name and has compatible parameters.

Invoke a method whose parameter type matches exactly the object type.

This is a convenient wrapper for MethodUtils.invokeExactMethod(Object object,String methodName,Object[] args) .

Invoke a static method whose parameter type matches exactly the object type.

This is a convenient wrapper for MethodUtils.invokeExactStaticMethod(Class objectClass,String methodName,Object[] args) .

Invoke a named method whose parameter type matches the object type.

The behaviour of this method is less deterministic than invokeExactMethod(). It loops through all methods with names that match and then executes the first it finds with compatable parameters.

This method supports calls to methods taking primitive parameters via passing in wrapping classes.

Invoke a named method whose parameter type matches the object type.

The behaviour of this method is less deterministic than MethodUtils.invokeExactMethod(Object object,String methodName,Object[] args) .

Invoke a named method whose parameter type matches the object type.

The behaviour of this method is less deterministic than MethodUtils.invokeExactMethod(Object object,String methodName,Object[] args,Class[] parameterTypes) .

Invoke a named static method whose parameter type matches the object type.

The behaviour of this method is less deterministic than MethodUtils.invokeExactMethod(Object,String,Object[],Class[]) .

Invoke a named static method whose parameter type matches the object type.

The behaviour of this method is less deterministic than MethodUtils.invokeExactMethod(Object object,String methodName,Object[] args) .

Invoke a named static method whose parameter type matches the object type.

The behaviour of this method is less deterministic than MethodUtils.invokeExactStaticMethod(Class objectClass,String methodName,Object[] args,Class[] parameterTypes) .

Determine whether a type can be used as a parameter in a method invocation.

Return an accessible method (that is, one that can be invoked via reflection) with given name and a single parameter. If no such method can be found, return null. Basically, a convenience wrapper that constructs a Class array for you.

Return an accessible method (that is, one that can be invoked via reflection) with given name and parameters. If no such method can be found, return null. This is just a convenient wrapper for MethodUtils.getAccessibleMethod(Method method) .

Return an accessible method (that is, one that can be invoked via reflection) that implements the specified Method. If no such method can be found, return null.

Find an accessible method that matches the given name and has compatible parameters. Compatible parameters mean that every method parameter is assignable from the given parameters. In other words, it finds a method with the given name that will take the parameters given.

This method is slightly undeterminstic since it loops through methods names and return the first matching method.

This method is used by MethodUtils.invokeMethod(Object object,String methodName,Object[] args,Class[] parameterTypes) .

This method can match primitive parameter by passing in wrapper classes. For example, a Boolean will match a primitive boolean parameter.
Parameters:
  clazz - find method in this class
Parameters:
  methodName - find method with this name
Parameters:
  parameterTypes - find method with compatible parameters The accessible method

Invoke a method whose parameter type matches exactly the object type.

This is a convenient wrapper for MethodUtils.invokeExactMethod(Object object,String methodName,Object[] args) .

Invoke a method whose parameter types match exactly the object types.

This uses reflection to invoke the method obtained from a call to getAccessibleMethod().

Invoke a method whose parameter types match exactly the parameter types given.

This uses reflection to invoke the method obtained from a call to getAccessibleMethod().

Invoke a static method whose parameter types match exactly the parameter types given.

This uses reflection to invoke the method obtained from a call to MethodUtils.getAccessibleMethod(Class,String,Class[]) .

Invoke a static method whose parameter type matches exactly the object type.

This is a convenient wrapper for MethodUtils.invokeExactStaticMethod(Class objectClass,String methodName,Object[] args) .

Invoke a static method whose parameter types match exactly the object types.

This uses reflection to invoke the method obtained from a call to MethodUtils.getAccessibleMethod(Class,String,Class[]) .

Invoke a named method whose parameter type matches the object type.

The behaviour of this method is less deterministic than invokeExactMethod(). It loops through all methods with names that match and then executes the first it finds with compatable parameters.

This method supports calls to methods taking primitive parameters via passing in wrapping classes. So, for example, a Boolean class would match a boolean primitive.

This is a convenient wrapper for MethodUtils.invokeMethod(Object object,String methodName,Object[] args) .

Invoke a named method whose parameter type matches the object type.

The behaviour of this method is less deterministic than MethodUtils.invokeExactMethod(Object object,String methodName,Object[] args) . It loops through all methods with names that match and then executes the first it finds with compatable parameters.

This method supports calls to methods taking primitive parameters via passing in wrapping classes. So, for example, a Boolean class would match a boolean primitive.

This is a convenient wrapper for MethodUtils.invokeMethod(Object object,String methodName,Object[] args,Class[] parameterTypes) .

Invoke a named method whose parameter type matches the object type.

The behaviour of this method is less deterministic than MethodUtils.invokeExactMethod(Object object,String methodName,Object[] args,Class[] parameterTypes) . It loops through all methods with names that match and then executes the first it finds with compatable parameters.

This method supports calls to methods taking primitive parameters via passing in wrapping classes. So, for example, a Boolean class would match a boolean primitive.

Invoke a named static method whose parameter type matches the object type.

The behaviour of this method is less deterministic than MethodUtils.invokeExactMethod(Object,String,Object[],Class[]) . It loops through all methods with names that match and then executes the first it finds with compatable parameters.

This method supports calls to methods taking primitive parameters via passing in wrapping classes. So, for example, a Boolean class would match a boolean primitive.

This is a convenient wrapper for MethodUtils.invokeStaticMethod(Class objectClass,String methodName,Object[] args) .

Invoke a named static method whose parameter type matches the object type.

The behaviour of this method is less deterministic than MethodUtils.invokeExactMethod(Object object,String methodName,Object[] args) . It loops through all methods with names that match and then executes the first it finds with compatable parameters.

This method supports calls to methods taking primitive parameters via passing in wrapping classes. So, for example, a Boolean class would match a boolean primitive.

This is a convenient wrapper for MethodUtils.invokeStaticMethod(Class objectClass,String methodName,Object[] args,Class[] parameterTypes) .

Invoke a named static method whose parameter type matches the object type.

The behaviour of this method is less deterministic than MethodUtils.invokeExactStaticMethod(Class objectClass,String methodName,Object[] args,Class[] parameterTypes) . It loops through all methods with names that match and then executes the first it finds with compatable parameters.

This method supports calls to methods taking primitive parameters via passing in wrapping classes. So, for example, a Boolean class would match a boolean primitive.

Determine whether a type can be used as a parameter in a method invocation. This method handles primitive conversions correctly.

In order words, it will match a Boolean to a boolean, a Long to a long, a Float to a float, a Integer to a int, and a Double to a double. Now logic widening matches are allowed. For example, a Long will not match a int.
Parameters:
  parameterType - the type of parameter accepted by the method
Parameters:
  parameterization - the type of parameter being tested true if the assignement is compatible.