Java Utililty Methods Reflection Method Parameter

List of utility methods to do Reflection Method Parameter

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Reflection Method Parameter

Description

The list of methods to do Reflection Method Parameter are organized into topic(s).

Method

Method getMethod(Class aClass, String methodName, Class[] parameterTypesToCheck, Class stopClass)
get Method

while (aClass != null && aClass != stopClass) {
 Method[] methods = aClass.getDeclaredMethods();
 for (int i = 0; i < methods.length; i++) {
 Method method = methods[i];
 if (method.getName().equals(methodName) && !Modifier.isAbstract(method.getModifiers())) {
 Class[] parameterTypes = method.getParameterTypes();
 if (parameterTypes.length == 0 && parameterTypesToCheck == null) {
 return method;
...

Method getMethod(Class aClass, String name, Class... parameters)
get Method

return findMethod(aClass.getMethods(), name, parameters);

Method getMethod(Class cl, String methodName, String obfName, Class... parameterTypes)
get Method

Method m = null;
try {
 try {
 m = cl.getDeclaredMethod(methodName, parameterTypes);
 } catch (Exception e) {
 if (m == null)
 m = cl.getDeclaredMethod(obfName, parameterTypes);
...

Method getMethod(Class clazz, String methodName, Class... parameterTypes)
We cannot use

clazz.getMethod(String name, Class... 
Class currentClass = clazz;
while (currentClass != null) {
 try {
 Method method = currentClass.getDeclaredMethod(methodName, parameterTypes);
 method.setAccessible(true);
 return method;
 } catch (NoSuchMethodException e) {
 currentClass = currentClass.getSuperclass();
...

 Method getMethod(Class clazz, String methodName, Class... parameterTypes) 
Search the method in the class and it's parent classes. 
return _getMethod(null, clazz, methodName, parameterTypes);

 Method getMethod(Class clazz, String name, Class... parameterTypes) 
Util method to get a method, ignoring checked exceptions 
Method method = null;
try {
 method = clazz.getMethod(name, parameterTypes);
} catch (Exception e) {
 e.printStackTrace();
return method;

 Method getMethod(Class clazz, String name, Class[] parameters) 
get Method
for (Method method : clazz.getMethods()) {
 if (name.equals(method.getName()) && isAssignable(method.getParameterTypes(), parameters))
 return method;
return clazz.getMethod(name, parameters);

 Method getMethod(Class declaringClass, String name, Class... parameterTypes) 
Convenience for getting a method from a class. 
try {
 return declaringClass.getMethod(name, parameterTypes);
} catch (Exception ex) {
 throw new RuntimeException(ex);

 Method getMethod(Class klass, String methodName, Class[] parameterTypes) 
Returns the method object identified by the specified class, name and paramater types. 
try {
 return klass.getDeclaredMethod(methodName, parameterTypes);
} catch (NoSuchMethodException e) {
 if (klass.equals(Object.class))
 return null;
 return getMethod(klass.getSuperclass(), methodName, parameterTypes);

 Method getMethod(Class target, String methodName, Class[] parameterTypes) 
get Method
return findMethod(target.getClass().getMethods(), methodName, parameterTypes);

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