package foundation.dao.version;

import java.util.List;

import foundation.json.IJSONWriter;
import foundation.util.MapList;

public class EntitySetChange implements IDataChange {

	private String dataName;
	private ChangeType changeType;
	private MapList<String, EntityChange> entitys;
	
	
	public EntitySetChange(String dataName) {
		this.dataName = dataName;
		entitys = new MapList<String, EntityChange>();
	}


	public void addOneEntityChange(String id, EntityChange entityChange) {
		entitys.add(id, entityChange);
	}
	
	public void setChangeType(ChangeType changeType) {
		this.changeType = changeType;
	}

	public String getDataName() {
		return dataName;
	}

	public ChangeType getChangeType() {
		return changeType;
	}

	public List<EntityChange> getEntitys() {
		return entitys.getItemList();
	}

	@Override
	public void writeJSON(IJSONWriter writer) {
		writer.beginObject(dataName);
		
		//1. 变更类型
		writer.write("change_type", changeType.name());
		
		if (ChangeType.NoChange == changeType) {
			writer.endObject();
			return;
		}
		
		//2. 变更的entity
		writer.beginArray("entitys");	
		
		for (EntityChange entityChange: entitys) {
			entityChange.writeJSON(writer);
		}
		
		writer.endArray();
		
		
		writer.endObject();
	}
	
}