package com.ssm.util.page;

import java.io.Serializable;  
import java.lang.reflect.Method;  
import java.lang.reflect.Modifier;  
import java.util.ArrayList;  
import java.util.HashMap;  
import java.util.List;  
import java.util.Map;  
public abstract class BaseEntity implements Serializable{  
	  
	    private static final long serialVersionUID = 1L;  
	      
	    private static Map<Class<?>,PropertyInfo[]> class2Props = new HashMap<Class<?>,PropertyInfo[]>(128);  
	      
	    @Override  
	    public String toString() {  
	        PropertyInfo[] props = class2Props.get(this.getClass());  
	        if( props == null ){  
	            props = getProps(this.getClass());  
	        }  
	          
	        StringBuilder builder = new StringBuilder(1024);  
	        boolean isFirst = true;  
	        for (int i = 0, n = props.length; i < n; i++) {  
	            try {  
	                PropertyInfo propInfo = props[i];                 
	                  
	                Object value = propInfo.getMethod.invoke(this, new Object[0]);  
	                if (isFirst)  
	                    isFirst = false;  
	                else  
	                    builder.append(",");  
	                builder.append(propInfo.propName);  
	                builder.append(":");  
	                if (value instanceof String)  
	                    builder.append("\"");  
	                builder.append(value);  
	                if (value instanceof String)  
	                    builder.append("\"");                 
	            } catch (Exception e) {  
	                // ignore  
	            }  
	        }  
	        return "{" + builder.toString() + "}";  
	    }  
	  
	    private static PropertyInfo[] getProps(Class<? extends BaseEntity> clazz) {  
	        PropertyInfo[] props;  
	        Method[] allMethods = clazz.getMethods();   
	        List<PropertyInfo> propList = new ArrayList<PropertyInfo>();  
	          
	        for (int i = 0, n = allMethods.length; i < n; i++) {  
	            try {  
	                Method method = allMethods[i];  
	                if ((method.getModifiers() & Modifier.PUBLIC) == 1  
	                        && method.getDeclaringClass() != Object.class  
	                        && (method.getParameterTypes() == null || method  
	                                .getParameterTypes().length == 0)) {  
	                    String methodName = method.getName();  
	                    if (methodName.startsWith("get") || methodName.startsWith("is") ) {  
	                        PropertyInfo propInfo = new PropertyInfo();                                       
	                        propInfo.getMethod = method;  
	                        if (methodName.startsWith("get")) {  
	                            propInfo.propName = methodName.substring(3, 4).toLowerCase()  
	                                    + methodName.substring(4);  
	                        } else if (methodName.startsWith("is")) {  
	                            propInfo.propName = methodName.substring(2, 3).toLowerCase()  
	                                    + methodName.substring(3);  
	                        }                 
	                        propList.add(propInfo);  
	                    }  
	                }                     
	            }catch(Exception e){                      
	            }  
	        }  
	          
	        props =  new PropertyInfo[propList.size()];  
	        propList.toArray(props);  
	        class2Props.put(clazz, props);  
	        return props;  
	    }  
	      
	    static class PropertyInfo{  
	        Method getMethod;  
	        String propName;          
	    }  
	  
	}  
