Java Reflection Constructor Get getConstructor(final Class valueClass, final Class parameter)

Description

get Constructor

License

Open Source License

Declaration

static <E> Constructor<E> getConstructor(final Class<E> valueClass, final Class<?> parameter) 

Method Source Code

//package com.java2s;
/*/*from w  w  w  . j av  a 2 s.  co m*/
 * Copyright (C) 2004-2015  exedio GmbH (www.exedio.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

import java.lang.reflect.Constructor;

public class Main {
    static <E> Constructor<E> getConstructor(final Class<E> valueClass, final Class<?> parameter) {
        final Constructor<E> constructor;
        final String classID = valueClass.getName();
        try {
            constructor = valueClass.getDeclaredConstructor(parameter);
        } catch (final NoSuchMethodException e) {
            throw new IllegalArgumentException(classID + " does not have a constructor "
                    + valueClass.getSimpleName() + '(' + getName(parameter) + ')', e);
        }
        constructor.setAccessible(true);
        return constructor;
    }

    private static String getName(final Class<?> clazz) {
        final Class<?> componentType = clazz.getComponentType();
        return componentType != null ? componentType.getName() + "[]" : clazz.getName();
    }
}

Related

1. getConstructor(Class type, Class... parameterTypes)
2. getConstructor(Class type, Class[] parameterTypes)
3. getConstructor(final Class theClass, final Class... parameterTypes)
4. getConstructor(final Class clazz, final Class... parameterTypes)
5. getConstructor(final Class clazz, final Class[] paramTypes)
6. getConstructor(final Class clazz, final Class... parametertypes)
7. getConstructor(final Class clazz, final Class... parameterTypes)
8. getConstructor(final Class clazz, final Object... constructorArgs)
9. getConstructor(final Class clazz, final Object... objs)