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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
package util;
import java.lang.reflect.Constructor;
public class DynamicClassLoader {
/**
* This method returns a class created by its name
* created by call to <code>Class.forName()</code>.<p>
* This method must be overloaded if another loading
* policy is required for Component and Interface
* testing classes.
* @param className The name of the class to create.
* @return The created class.
*/
public static Class forName(String className)
throws ClassNotFoundException {
return Class.forName(className) ;
}
/**
* Get an instance of a class. The empty constructor is used.
* @param className The class to instantiate.
* @return The instance of the class.
*/
public Object getInstance(String className)
throws IllegalArgumentException {
try {
Class cls = DynamicClassLoader.forName(className);
return cls.newInstance();
} catch ( ClassNotFoundException e ) {
throw new IllegalArgumentException("Couldn't find " + className
+ " " + e);
} catch ( IllegalAccessException e ) {
throw new IllegalArgumentException("Couldn't access " + className
+ " " + e);
} catch ( InstantiationException e ) {
throw new IllegalArgumentException("Couldn't instantiate " +
className + " " + e);
}
}
/**
* Get an instance of a class. The constructor matching to the
* arguments is used and the arguments are given to this constructor.
* @param className The class to instantiate.
* @param ctorArgs Arguments for the constructor.
* @return The instance of the class.
*/
public Object getInstance(String className, Object[] ctorArgs)
throws IllegalArgumentException {
Class[] ctorType = new Class[ctorArgs.length];
for(int i=0; i<ctorType.length; i++) {
ctorType[i] = ctorArgs[i].getClass();
}
return getInstance(className, ctorType, ctorArgs);
}
/**
* Get an instance of a class. The constructor matching to the
* given calss types is used and the instance is created using the arguments
* for the constructor.
* @param className The class to instantiate.
* @param ctorClassTypes The class types matching to the constructor.
* @param ctorArgs Arguments for the constructor.
* @return The instance of the class.
*/
public Object getInstance(String className, Class[]ctorClassTypes, Object[] ctorArgs)
throws IllegalArgumentException {
try {
Class cls = DynamicClassLoader.forName(className);
Constructor ctor = cls.getConstructor(ctorClassTypes);
System.out.println("ctor: " + ctor.getName() + " " + ctor.getModifiers());
return ctor.newInstance(ctorArgs);
} catch ( ClassNotFoundException e ) {
throw new IllegalArgumentException("Couldn't find " + className
+ " " + e);
} catch ( IllegalAccessException e ) {
throw new IllegalArgumentException("Couldn't access " + className
+ " " + e);
} catch ( NoSuchMethodException e ) {
throw new IllegalArgumentException("Couldn't find constructor for " + className
+ " " + e);
} catch ( java.lang.reflect.InvocationTargetException e ) {
e.printStackTrace();
throw new IllegalArgumentException("Couldn't invoke " +
className + " " + e);
} catch ( InstantiationException e ) {
throw new IllegalArgumentException("Couldn't instantiate " +
className + " " + e);
}
}
}
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