Java SQL Type newInstance(Class clazz, Object... params)

Description

new Instance

License

Apache License

Declaration

public static <T> T newInstance(Class<T> clazz, Object... params) throws SQLException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.lang.reflect.Constructor;
import java.sql.SQLException;

public class Main {
    public static <T> T newInstance(Class<T> clazz, Object... params) throws SQLException {
        try {//w  w w .  j a v  a  2 s .c o m
            if (params == null || params.length == 0) {
                return clazz.newInstance();
            } else {
                for (Constructor<?> ctor : clazz.getConstructors()) {
                    if (ctor.getParameterTypes().length == params.length) {
                        int paramIndex = 0;
                        for (Class<?> paramType : ctor.getParameterTypes()) {
                            if (!paramType.isInstance(params[paramIndex])) {
                                break;
                            }
                            paramIndex++;
                        }
                        if (paramIndex == params.length) {
                            return clazz.cast(ctor.newInstance(params));
                        }
                    }
                }
                throw new SQLException("Constructor not found for " + clazz);
            }
        } catch (ReflectiveOperationException reflectiveOperationException) {
            throw new SQLException(reflectiveOperationException);
        }
    }
}

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