abstractvalueobject.java

《j2ee开发全程实录》随书源码

package com.cownew.PIS.framework.common;

import java.beans.PropertyDescriptor;
import java.util.Collection;
import java.util.Map;

import com.cownew.ctk.common.ExceptionUtils;
import com.cownew.ctk.common.PropertyUtils;

abstract public class AbstractValueObject implements IValueObject
{

	public String toString()
	{
		try
		{
			StringBuffer sb = new StringBuffer();
			PropertyDescriptor[] propDescs = org.apache.commons.beanutils.PropertyUtils
					.getPropertyDescriptors(this);
			for (int i = 0, n = propDescs.length; i < n; i++)
			{
				String name = propDescs[i].getName();
				if (!org.apache.commons.beanutils.PropertyUtils.isReadable(
						this, name))
				{
					continue;
				}
				Object propValue = PropertyUtils.getProperty(this, name);

				// 为防止对象自引用或者循环引用,造成死循环,因此对于关联属性不进行级联描述
				if (propValue instanceof Collection || propValue instanceof Map)
				{
					sb.append(name).append("=[more...]");
				} else if (propValue instanceof IValueObject)
				{
					String className = propValue.getClass().getName();
					sb.append(name).append("=[").append(className).append("]");
				} else
				{
					sb.append(name).append("=[").append(propValue).append("]");
				}
			}
			return sb.toString();
		} catch (Exception e)
		{
			throw ExceptionUtils.toRuntimeException(e);
		}
	}

}