Java Reflection Constructor Get getConstructorOrFail(Class clazz, Class... argTypes)

Description

Finds and returns the matching constructor in class clazz , or fails with a RuntimeException if the constructor cannot be found.

License

Open Source License

Parameter

Parameter	Description
clazz	The class of the constructor.
argTypes	The argument types of the constructor.

Return

The constructor found.

Declaration

public static <T> Constructor<T> getConstructorOrFail(Class<T> clazz, Class<?>... argTypes) 

Method Source Code

//package com.java2s;
/*/*from w ww . j a v  a 2s . com*/
 * 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.util.Arrays;

public class Main {
    /**
     * Finds and returns the matching constructor in class {@code clazz}, or fails with a
     * {@code RuntimeException} if the constructor cannot be found.
     *
     * @param clazz The class of the constructor.
     * @param argTypes The argument types of the constructor.
     * @return The constructor found.
     */
    public static <T> Constructor<T> getConstructorOrFail(Class<T> clazz, Class<?>... argTypes) {
        try {
            return clazz.getConstructor(argTypes);
        } catch (Exception e) {
            throw new RuntimeException("Failed to get constructor '" + clazz.getSimpleName() + "' with args "
                    + Arrays.asList(argTypes), e);
        }
    }
}

Related

1. getConstructorForArguments( java.lang.reflect.Constructor[] constructors, Object... arguments)
2. getConstructorFromSignature(Class clazz, String cstrSig)
3. getConstructorIfAvailable(Class clazz, Class... paramTypes)
4. getConstructorLabel(java.lang.reflect.Constructor con)
5. getConstructorOptional(Class cls, Class... argsTypes)
6. getConstructors(Class cl)
7. getConstructors(Class infoClass)
8. getConstructors(Class clazz)
9. getConstructors(Class clazz, int args)