Java Reflection Constructor Invoke invokeConstructorOrFail(Constructor constructor, Object... args)

Description

Invokes the given constructor with optional arguments args , returning the new instance created by constructor .

License

Open Source License

Parameter

Parameter	Description
constructor	The constructor to invoke.
args	The constructor arguments.

Return

The new instance created by calling the constructor.

Declaration

public static <T> T invokeConstructorOrFail(Constructor<T> constructor, Object... args) 

Method Source Code

//package com.java2s;
/*//from w w w .j a va2 s .  c  o m
 * Copyright (C) 2017 Johan Dykstrom
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

public class Main {
    /**
     * Invokes the given constructor with optional arguments {@code args}, returning
     * the new instance created by {@code constructor}. If {@code constructor} cannot
     * be invoked, this method fails with a {@code RuntimeException}.
     *
     * @param constructor The constructor to invoke.
     * @param args The constructor arguments.
     * @return The new instance created by calling the constructor.
     */
    public static <T> T invokeConstructorOrFail(Constructor<T> constructor, Object... args) {
        try {
            return constructor.newInstance(args);
        } catch (InvocationTargetException e) {
            throw new RuntimeException("Failed to call constructor '"
                    + constructor.getDeclaringClass().getSimpleName() + "': " + e.getCause().getMessage(),
                    e.getCause());
        } catch (Exception e) {
            throw new RuntimeException("Failed to call constructor '"
                    + constructor.getDeclaringClass().getSimpleName() + "': " + e.getMessage(), e);
        }
    }
}

Related

1. invokeConstructor(final Constructor constructor, final Object... args)
2. invokeConstructor(final Constructor constructor, final Object[] args)
3. invokeConstructor(final Constructor constructor, final Object... args)
4. invokeConstructor(String className, Class[] paramTypes, Object[] paramValues)
5. invokeConstructor(String className, Object... arguments)
6. invokeCtor(Constructor ctor, String str)
7. invokeExactConstructor(Class klass, Object arg)
8. invokePrivateConstructor(Class clazz)
9. invokePrivateConstructor(Class classType)