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/* ProxyUtils.java -- Utilities class for Proxy related operations
Copyright (C) 2006 Olivier Jolly <olivier.jolly@pcedev.com>
This file is part of Mauve.
Mauve is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
Mauve is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with Mauve; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
*/
// Tags: not-a-test
package gnu.testlet.java.lang.reflect.Proxy;
import java.lang.reflect.Method;
import java.util.Arrays;
/**
* Utility class with some proxy related methods
* @author Olivier Jolly <olivier.jolly@pcedev.com>
*/
public final class ProxyUtils
{
/**
* Compare two methods excepted the declaring class equality test
* @param lhs
* first method to test
* @param rhs
* second method to test
* @return whether the two methods are equals even if of different declaring
* class
*/
static boolean compareMethodExceptedDeclaringClass(Method lhs, Method rhs)
{
if (!lhs.getName().equals(rhs.getName()))
{
return false;
}
if (lhs.getReturnType() != rhs.getReturnType())
{
return false;
}
if (!Arrays.equals(lhs.getParameterTypes(), rhs.getParameterTypes()))
{
return false;
}
return true;
}
/**
* Compare two methods based only on their name and parameter
* @param lhs
* first method to test
* @param rhs
* second method to test
* @return whether the name and parameter type are equal
*/
static boolean compareMethodOnNameAndParameterTypes(Method lhs, Method rhs)
{
if (!lhs.getName().equals(rhs.getName()))
{
return false;
}
if (!Arrays.equals(lhs.getParameterTypes(), rhs.getParameterTypes()))
{
return false;
}
return true;
}
/**
* Return a valid value for the given class, even if a primitive
* @param returnType
* the expected class
* @return a neutral value of the expected class
* @throws InstantiationException
* in case of problem with the constructor invocation
* @throws IllegalAccessException
* in case of problem with the constructor invocation
*/
public static Object getNeutralValue(Class returnType)
throws InstantiationException, IllegalAccessException
{
if (returnType.equals(boolean.class))
{
return Boolean.FALSE;
}
if (returnType.equals(int.class))
{
return new Integer(0);
}
if (returnType.equals(float.class))
{
return new Float(0);
}
if (returnType.equals(double.class))
{
return new Double(0);
}
if (returnType.equals(char.class))
{
return new Character((char) 0);
}
if (returnType.equals(short.class))
{
return new Short((short) 0);
}
if (returnType.equals(long.class))
{
return new Long(0);
}
if (returnType.equals(void.class))
{
return null;
}
return returnType.newInstance();
}
}
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