hash a Bean - Java Reflection

Java examples for Reflection:Java Bean

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Description

hash a Bean

Demo Code


//package com.java2s;
import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;

public class Main {

    public static int hashBean(Object bean) {
        if (bean == null)
            return -1;
        int hash = bean.getClass().hashCode();
        // new ToStringCreator(this)
        try {/*w  w  w  .j ava 2s  .  c  o  m*/
            BeanInfo bi = Introspector.getBeanInfo(bean.getClass());
            PropertyDescriptor[] pd = bi.getPropertyDescriptors();
            for (int i = 0; i < pd.length; i++) {
                if (!"class".equals(pd[i].getName())) {
                    Object result = pd[i].getReadMethod().invoke(bean);
                    if (result != null) {
                        hash += result.hashCode();
                        if (i == pd.length - 1)
                            continue;
                    }
                }
            }
        } catch (Exception ex) {
            return -1;
        }

        return hash;
    }
}

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