/**
    * Copyright By Grandsoft Company Limited.  
    * 2012-2-16 下午03:34:12
    */
   package gboat2.base.core.web;
   
   import gboat2.base.bridge.debug.DefaultDebugHook;
   import gboat2.base.bridge.util.ClassHelper;
   
  import java.util.List;
  
  import net.sf.json.JSONArray;
  import net.sf.json.JSONObject;
  
  /**
   *  
   * 拆分元数据
   * @author zhangxj-a
   * @since jdk1.6
   * @date 2013-5-21
   *  
   */
  public class MetadataList extends SplitMetadataStrategy {
  
  	private static SplitMetadataStrategy instance = new MetadataList();
  
  	private MetadataList() {
  		super();
  	}
  
  	public JSONObject decorateMetadata(JSONObject returned, String invokeMethod, BaseActionSupport action) {
  		//list方法需要附加ListDomain或Domain的fields
  		Class<?> domain;
  		domain = action.getDomainClassAnnotationedForList();
  		if (domain == null) {
  			throw new RuntimeException("no Domain or ListDomain annotation exist.");
  		}
  		List<String> fields = ClassHelper.getFieldNames(domain);
  
  		JSONArray operas = (JSONArray) returned.get("operations");
  		if (operas == null) {
  			operas = new JSONArray();
  		} else {
  			fields.add("operations");
  		}
  		returned.accumulate("fields", fields.toArray());
  		//增加系统级操作
  		if (DefaultDebugHook.getInstance().devMode) {
  			//增加设计、属性按钮
  			operas.addAll(getSystemButtonsJSON(action, invokeMethod));
  		}
  
  		//获取页面级全局操作操作（比如“添加记录”这种定义在组件上的按钮，而不是数据列表中的“编辑”和“删除”等），并进行权限过滤
  		operas = filtMetaOperas(operas, action);
  		returned.put("operations", operas);
  
  		return returned;
  	}
  
  	public static SplitMetadataStrategy getInstance() {
  		return instance;
  	}
  }