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GEARS Runtime Common

There is a newer version: 1.17.5

package com.xlrit.gears.base.util;

import java.io.IOException;
import java.io.InputStream;
import java.util.*;

import com.google.common.collect.ImmutableList;
import org.springframework.core.io.Resource;

public class CommonUtils {
    private CommonUtils() {}

    @SuppressWarnings("unchecked")
   	public static  Class getRealClass(T instance) {
   		Objects.requireNonNull(instance, "Cannot determine real class of null value");
   		return (Class) org.hibernate.Hibernate.getClass(instance);
   	}

   	public static Class getNormalizedType(Object instance) {
   		Objects.requireNonNull(instance, "Cannot determine normalized type of null value");
   		if (instance instanceof List) return List.class;
   		if (instance instanceof Set) return Set.class;
   		if (instance instanceof Collection) return Collection.class;
   		return org.hibernate.Hibernate.getClass(instance);
   	}

    public static  List safeCopy(List list) {
        return list == null ? null : ImmutableList.copyOf(list);
    }

	public static Properties loadProperties(Resource resource) {
		if (resource == null || !resource.exists()) throw new IllegalArgumentException("Cannot load properties from non-existent resource: " + resource);
		try (InputStream is = resource.getInputStream()) {
			Properties properties = new Properties();
			properties.load(is);
			return properties;
		}
		catch (IOException e) {
			throw new RuntimeException(e);
		}
	}
}