/**
* Copy constructor.
*
* @param orig Copy to create this instance from.
* @param newParams Optional array of new parameters to override the ondes from {@code orig}.
*/
public GridifyArgumentAdapter(GridifyArgument orig, Object... newParams) {
A.notNull(orig, "orig");
cls = orig.getMethodClass();
mtdName = orig.getMethodName();
target = orig.getTarget();
types = new Class[orig.getMethodParameterTypes().length];
params = new Object[orig.getMethodParameters().length];
System.arraycopy(orig.getMethodParameters(), 0, params, 0, params.length);
System.arraycopy(orig.getMethodParameterTypes(), 0, types, 0, types.length);
// Override parameters, if any.
if (newParams.length > 0) {
setMethodParameters(newParams);
}
}
/**
* Provides default implementation for execution of grid-enabled methods. This method assumes that
* argument passed in is of {@link GridifyArgument} type. It attempts to reflectively execute a
* method based on information provided in the argument and returns the return value of the
* method.
*
* <p>If some exception occurred during execution, then it will be thrown out of this method.
*
* @return {@inheritDoc}
* @throws GridException {@inheritDoc}
*/
@Override
public Object execute() throws GridException {
GridifyArgument arg = argument(0);
try {
// Get public, package, protected, or private method.
Method mtd =
arg.getMethodClass()
.getDeclaredMethod(arg.getMethodName(), arg.getMethodParameterTypes());
// Attempt to soften access control in case we grid-enabling
// non-accessible method. Subject to security manager setting.
if (!mtd.isAccessible())
try {
mtd.setAccessible(true);
} catch (SecurityException e) {
throw new GridException(
"Got security exception when attempting to soften access control for "
+ "@Gridify method: "
+ mtd,
e);
}
Object obj = null;
// No need to create an instance for static methods.
if (!Modifier.isStatic(mtd.getModifiers()))
// Obtain instance to execute method on.
obj = arg.getTarget();
return mtd.invoke(obj, arg.getMethodParameters());
} catch (InvocationTargetException e) {
if (e.getTargetException() instanceof GridException)
throw (GridException) e.getTargetException();
throw new GridException(
"Failed to invoke a method due to user exception.", e.getTargetException());
} catch (IllegalAccessException e) {
throw new GridException("Failed to access method for execution.", e);
} catch (NoSuchMethodException e) {
throw new GridException("Failed to find method for execution.", e);
}
}