get Java Bean Property Descriptor - Java Reflection

Java examples for Reflection:Java Bean

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Description

get Java Bean Property Descriptor

Demo Code


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

public class Main {
    public static void main(String[] argv) throws Exception {
        Class beanClass = String.class;
        String propertyName = "java2s.com";
        System.out.println(getPropertyDescriptor(beanClass, propertyName));
    }//from   w  ww. ja v  a  2 s .co m

    public static PropertyDescriptor getPropertyDescriptor(Class beanClass,
            String propertyName) {
        for (PropertyDescriptor pd : getPropertyDescriptors(beanClass)) {
            if (pd.getName().equals(propertyName)) {
                return pd;
            }
        }
        return null;
    }

    public static PropertyDescriptor[] getPropertyDescriptors(
            Class beanClass) {
        BeanInfo beanInfo = null;
        try {
            beanInfo = Introspector.getBeanInfo(beanClass);
        } catch (IntrospectionException e) {
            return (new PropertyDescriptor[0]);
        }
        PropertyDescriptor[] descriptors = beanInfo
                .getPropertyDescriptors();
        if (descriptors == null) {
            descriptors = new PropertyDescriptor[0];
        }
        return descriptors;
    }

    public static PropertyDescriptor getPropertyDescriptors(
            Class beanClass, String name) {
        for (PropertyDescriptor pd : getPropertyDescriptors(beanClass)) {
            if (pd.getName().equals(name)) {
                return pd;
            }
        }
        return null;
    }
}

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