zhyi_12

打字越来越累了，也开始玩一下代码生成。
今天仔细看了下freemarker，貌似还比较好玩的样子。试着写一写model的模板了。

/**
 * 代码声明
 */
package ${package};

import org.youi.common.model.BaseObject;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

import org.hibernate.validator.Length;
import org.hibernate.validator.NotNull;
import org.hibernate.validator.Pattern;
/**
 * 功能说明:
 * ${modelDescription}
 * @author zhyi
 * @version 1.0.1
 * 
 */
@Entity
@Table(name = "${tableName}")
public class ${className} extends BaseObject {
	<#list attributes as attribute>
	private ${attribute.type} ${attribute.name};<#if attribute.description??>//${attribute.description}</#if>
	
	</#list>
	<#list attributes as attribute>
	public void set${attribute.FUName}(${attribute.type} ${attribute.name}){
		this.${attribute.name} = ${attribute.name};
	}
	
	<#if attribute.notNull??&&attribute.notNull=="true">@NotNull</#if><#if attribute.id=="true">
	@Id</#if><#if attribute.column??>
	@Column(name = "${attribute.column}")</#if><#if attribute.length??>
	@Length(<#if attribute.min??>min = ${attribute.min},</#if>max = ${attribute.length})</#if>
	public ${attribute.type} get${attribute.FUName}(){
		return this.${attribute.name};
	}
	
	</#list>
	public boolean equals(Object o) {
		if (o == null ) return false;
		if (this == o ) return true;
		if ( !(o instanceof ${className}) ) return false;
		${className} obj = (${className}) o;
		return <#list attributes as attribute>this.get${attribute.FUName}().equals(obj.get${attribute.FUName}())<#if attribute.size != "large">&&</#if></#list>;
	}
	
	public String toString(){
		return ${toString};
	}
	
	public int hashCode() {
		int hash = 0;
		<#list attributes as attribute>
		<#if attribute.id == "true">
		hash+=this.get${attribute.FUName}().hashCode()*17+37;
		</#if>
		</#list>
		return hash;
	}
}

今天学会的一些东西：

1、使用<#list></#list> 循环标签时，变量对应的顺序和集合的类型密切相关，适当的时机选择使用list还是set。用list的时候，为lis中t对象增加size属性，标志最后一个值为特定值以作些判断。比如我生成equals方法时，碰到最后一个属性不加&&符号。

2、<#if attribute.notNull??&&attribute.notNull=="true">@NotNull</#if><#if attribute.id=="true"> ：if判断还真是有意思，居然这么干 attribute.notNull??

就用到了这两样东西，第一天的印象还不错，明天继续学习。

简单调用的代码:

        Map root = new HashMap();
        root.put("package",   "org.youi.model");
        root.put("className", "User");
        root.put("tableName", "YOUI_USER");
        root.put("modelDescription", "用户");
        root.put("toString", "this.userName+this.userId");
        
        List attributes = new ArrayList();
        root.put("attributes", attributes);
        Map attribute1 = new HashMap();
        attributes.add(attribute1);
        attribute1.put("type", "String");
        attribute1.put("name", "userId");
        attribute1.put("FUName", "UserId");
        attribute1.put("column", "USER_ID");
        attribute1.put("size", "fitst");
        attribute1.put("id", "true");
        attribute1.put("length", "20");
        attribute1.put("min", "6");
        attribute1.put("description", "用户ID");
        attribute1.put("notNull", "true");
        
        Map attribute2 = new HashMap();
        attributes.add(attribute2);
        attribute2.put("type", "String");
        attribute2.put("name", "userName");
        attribute2.put("FUName", "UserName");
        attribute2.put("column", "USER_NAME");
        attribute2.put("size", "2");
        attribute2.put("id", "true");
        attribute2.put("notNull", "true");
        
        Map attribute3 = new HashMap();
        attributes.add(attribute3);
        attribute3.put("type", "String");
        attribute3.put("name", "password");
        attribute3.put("FUName", "Password");
        attribute3.put("column", "PASSWORD");
        attribute3.put("size", "large");
        attribute3.put("id", "false");
        /* Merge data-model with template */
        ModelCode modelCode = new ModelCode();
        modelCode.setClassName("User");
        modelCode.setOutPath("E:/workspace/youi/src/org/youi/model/User.java");
        modelCode.setData(root);
        GeneratorFactory.getInstance().generatorCode("model",modelCode);