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package step.core.collections;

import java.lang.reflect.InvocationTargetException;
import java.util.Comparator;
import java.util.Map;

import org.apache.commons.beanutils.BeanUtilsBean;
import org.apache.commons.beanutils.ConvertUtilsBean;
import org.apache.commons.beanutils.NestedNullException;
import org.apache.commons.beanutils.PropertyUtilsBean;
import step.core.accessors.AbstractIdentifiableObject;


public class PojoUtils {

    private static BeanUtilsBean beanUtilsBean;

    public static Object getProperty(Object bean, String propertyName) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException {
        try {
            return beanUtilsBean.getPropertyUtils().getNestedProperty(bean, propertyName);
        } catch (NestedNullException e) {
            return null;
        }
    }

    public static Comparator comparator(String propertyName) {
        Comparator comparing = Comparator.comparing(e->{
            try {
                return getProperty(e, propertyName).toString();
            } catch (NoSuchMethodException e1) {
                return "";
            } catch (IllegalAccessException | InvocationTargetException e1) {
                throw new RuntimeException(e1);
            }
        });
        return comparing;
    }

    static {
        beanUtilsBean = new BeanUtilsBean(new ConvertUtilsBean(), new PropertyUtilsBean() {

            @Override
            public Object getSimpleProperty(Object bean, String name)
                    throws IllegalAccessException, InvocationTargetException, NoSuchMethodException {
                if (name.equals("_class")) {
                    return bean.getClass().getName();
                } else {
                    return super.getSimpleProperty(bean, name);
                }
            }

            @Override
            protected Object getPropertyOfMapBean(Map bean, String propertyName) throws IllegalArgumentException,
                    IllegalAccessException, InvocationTargetException, NoSuchMethodException {
                if (propertyName.equals(AbstractIdentifiableObject.ID)) {
                    if (bean instanceof Document) {
                        return ((Document) bean).getId();
                    } else {
                        return super.getPropertyOfMapBean(bean, propertyName);
                    }
                } else {
                    return super.getPropertyOfMapBean(bean, propertyName);
                }
            }
        });
    }
}
    

    

    

            

    

            



    
    






    
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