Java Reflection Constructor Get getConstructor(Class sourceClass, boolean isFindDeclaredConstructor, boolean isUpwardFind, Class... constructorParameterTypes)

Description

get Constructor

License

Apache License

Declaration

public static Constructor<?> getConstructor(Class<?> sourceClass, boolean isFindDeclaredConstructor,
        boolean isUpwardFind, Class<?>... constructorParameterTypes) 

Method Source Code

//package com.java2s;
/*//from w ww.ja  va2  s  .  c o  m
 * Copyright (C) 2013 Peng fei Pan <sky@xiaopan.me>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.lang.reflect.Constructor;

public class Main {

    public static Constructor<?> getConstructor(Class<?> sourceClass, boolean isFindDeclaredConstructor,
            boolean isUpwardFind, Class<?>... constructorParameterTypes) {
        Constructor<?> method = null;
        try {
            method = isFindDeclaredConstructor ? sourceClass.getDeclaredConstructor(constructorParameterTypes)
                    : sourceClass.getConstructor(constructorParameterTypes);
        } catch (NoSuchMethodException e1) {
            if (isUpwardFind) {
                Class<?> classs = sourceClass.getSuperclass();
                while (method == null && classs != null) {
                    try {
                        method = isFindDeclaredConstructor
                                ? sourceClass.getDeclaredConstructor(constructorParameterTypes)
                                : sourceClass.getConstructor(constructorParameterTypes);
                    } catch (NoSuchMethodException e11) {
                        classs = classs.getSuperclass();
                    }
                }
            }
        }
        return method;
    }
}

Related

1. getConstructor(Class clazz, Object... args)
2. getConstructor(Class clazz, Object[] parameters)
3. getConstructor(Class cls, Class[] signature)
4. getConstructor(Class cls, Object... parameters)
5. getConstructor(Class klass, Class... parameterTypes)
6. getConstructor(Class theClass, Class[] paramTypes)
7. getConstructor(Class type, Constructor c)
8. getConstructor(Class type, Object[] args)
9. getConstructor(Class type, Class[] givenTypes)