Java Class New Instance newInstance(Class type, Class declarator, Annotation annotation)

Description

new Instance

License

Open Source License

Declaration

@SuppressWarnings("unchecked")
    public static <T> T newInstance(Class<T> type, Class<?> declarator, Annotation annotation)
            throws IllegalAccessException 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2012 itemis AG (http://www.itemis.eu) and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *******************************************************************************/

import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;

import java.lang.reflect.InvocationTargetException;

public class Main {
    @SuppressWarnings("unchecked")
    public static <T> T newInstance(Class<T> type, Class<?> declarator, Annotation annotation)
            throws IllegalAccessException {
        if (declarator != null)
            try {
                Constructor<?> c = type.getDeclaredConstructor(declarator.getClass(), annotation.annotationType());
                c.setAccessible(true);/*from  w ww  .j  a va2  s .c  om*/
                if (c != null)
                    return (T) c.newInstance(declarator, annotation);
            } catch (SecurityException e) {
            } catch (NoSuchMethodException e) {
            } catch (InstantiationException e) {
            } catch (InvocationTargetException e) {
                throw new RuntimeException(e);
            }
        try {
            Constructor<?> c = type.getConstructor(annotation.annotationType());
            if (c != null)
                return (T) c.newInstance(annotation);
        } catch (SecurityException e) {
        } catch (NoSuchMethodException e) {
        } catch (InstantiationException e) {
        } catch (InvocationTargetException e) {
            throw new RuntimeException(e);
        }
        try {
            Constructor<?> c = type.getConstructor();
            if (c != null)
                return (T) c.newInstance();
        } catch (SecurityException e) {
        } catch (NoSuchMethodException e) {
        } catch (InstantiationException e) {
        } catch (InvocationTargetException e) {
            throw new RuntimeException(e);
        }
        return null;
    }
}

Related

1. newInstance(Class type)
2. newInstance(Class type)
3. newInstance(Class type)
4. newInstance(Class type)
5. newInstance(Class type)
6. newInstance(Class type, Class[] parameterTypes, Object[] args)
7. newInstance(Class type, Object... args)
8. newInstance(Class type, Object... params)
9. newInstance(Constructor c, List