/**
* This file Copyright (c) 2010-2012 Magnolia International
* Ltd. (http://www.magnolia-cms.com). All rights reserved.
*
*
* This file is dual-licensed under both the Magnolia
* Network Agreement and the GNU General Public License.
* You may elect to use one or the other of these licenses.
*
* This file is distributed in the hope that it will be
* useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
* Redistribution, except as permitted by whichever of the GPL
* or MNA you select, is prohibited.
*
* 1. For the GPL license (GPL), you can redistribute and/or
* modify this file under the terms of the GNU General
* Public License, Version 3, as published by the Free Software
* Foundation. You should have received a copy of the GNU
* General Public License, Version 3 along with this program;
* if not, write to the Free Software Foundation, Inc., 51
* Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 2. For the Magnolia Network Agreement (MNA), this file
* and the accompanying materials are made available under the
* terms of the MNA which accompanies this distribution, and
* is available at http://www.magnolia-cms.com/mna.html
*
* Any modifications to this file must keep this entire header
* intact.
*
*/
package info.magnolia.objectfactory;
import org.apache.commons.beanutils.ConstructorUtils;
import java.lang.reflect.InvocationTargetException;
import java.util.Arrays;
/**
* A ClassFactory implementation which uses the default class loader and the thread context class loader.
*
* @author gjoseph
* @version $Revision: $ ($Author: $)
*/
public class DefaultClassFactory implements ClassFactory {
@Override
public <C> Class<C> forName(String className) throws ClassNotFoundException {
Class<C> loadedClass;
try {
loadedClass = (Class<C>) Class.forName(className);
} catch (ClassNotFoundException e) {
loadedClass = (Class<C>) Class.forName(className, true, Thread.currentThread().getContextClassLoader());
}
return loadedClass;
}
@Override
public <T> T newInstance(final Class<T> c, final Class<?>[] argTypes, final Object... params) {
if (argTypes.length != params.length) {
throw new IllegalStateException("Argument types and values do not match! " + Arrays.asList(argTypes) + " / " + Arrays.asList(params));
}
return newInstance(c, params, new Invoker<T>() {
@Override
public T invoke() throws InvocationTargetException, NoSuchMethodException, IllegalAccessException, InstantiationException {
return (T) ConstructorUtils.invokeConstructor(c, params, argTypes);
}
});
}
@Override
public <T> T newInstance(final Class<T> c, final Object... params) {
return newInstance(c, params, new Invoker<T>() {
@Override
public T invoke() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException, InstantiationException {
return (T) ConstructorUtils.invokeConstructor(c, params);
}
});
}
private <T> T newInstance(Class<T> c, Object[] params, Invoker<T> invoker) {
// TODO -
// c.isAnnotationPresent(Deprecated) - at class or constructor level,
// output a warning - todo bis - use a subclass of java.lang.Deprecated which allows a message
try {
if (params == null || params.length == 0) {
// shortcut
return c.newInstance();
}
// org.apache.commons.beanutils.ConstructorUtils#getMatchingAccessibleConstructor is private,
// otherwise, we'd simply extract a getConstructor() method to implement our 2 newInstance() methods.
return invoker.invoke();
} catch (NoSuchMethodException e) {
throw new MgnlInstantiationException(e.getMessage(), e);
} catch (IllegalAccessException e) {
throw new MgnlInstantiationException(e.getMessage(), e);
} catch (InvocationTargetException e) {
throw new MgnlInstantiationException(e.getMessage(), e);
} catch (InstantiationException e) {
throw new MgnlInstantiationException(e.getMessage(), e);
}
}
private static interface Invoker<T> {
T invoke() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException, InstantiationException;
}
}