package foundation.io.engine;

import foundation.code.CodeProvider;
import foundation.dao.bizlogic.ICodeProvider;
import foundation.data.entity.Entity;
import foundation.data.meta.field.Field;
import foundation.util.ID;

public class TriggerEvent implements ILineValueListener{
	
	private String triggerName;
	private String[] columnNames;
	private int[] columnIndexes;
	private Field field;
	private String remark;
	
	public void setTriggerName(String triggerName) {
		this.triggerName = triggerName;
	}
	
	public void setColumnNames(String[] columnNames) {
		this.columnNames = columnNames;
	}
	
	public void setColumnIndexes(int[] columnIndexes) {
		this.columnIndexes = columnIndexes;
	}
	
	public void setField(String fieldName) {
		Field field = new Field(fieldName);
		this.field = field;
	}
	
	public void setRemark(String remark) {
		this.remark = remark;
	}

	public String getTriggerName() {
		return triggerName;
	}
	
	public String[] getColumnNames() {
		return columnNames;
	}
	
	public int[] getColumnIndexes() {
		return columnIndexes;
	}
	
	public String getFieldName() {
		return field.getName();
	}
	
	public String getRemark() {
		return remark;
	}

	@Override
	public String notifyReadNewValue(TriggerEvent event, Entity entity, String key) {
		String triggerName = event.getTriggerName();
		String value = null;
		
		//1. 根据需要，生成编码
		if (triggerName.startsWith("Code")) {
			ICodeProvider codeProvider = CodeProvider.getInstance(field, triggerName);
			value = codeProvider.nextval(null, entity);
			entity.set(field.getName(), value);
		}
		else if (triggerName.startsWith("ID")) {
			value = ID.newValue();
			entity.set(field.getName(), value);
		}
		return value;
	}
	
}