Column.java

package com.xiaoleilu.hutool.db.meta;

import java.sql.ResultSet;
import java.sql.SQLException;

import com.xiaoleilu.hutool.db.DbRuntimeException;
import com.xiaoleilu.hutool.util.StrUtil;

/**
 * 数据库表的列信息
 * @author loolly
 *
 */
public class Column implements Cloneable{
	
	//----------------------------------------------------- Fields start
	private String tableName;		//表名
	
	private String name;				//列名
	private int type;						//类型，对应java.sql.Types中的类型
	private int size;						//大小
	private boolean isNullable;		//是否为可空
	//----------------------------------------------------- Fields end
	
	/**
	 * 创建列对象
	 * @param tableName 表名
	 * @param columnMetaRs 列元信息的ResultSet
	 * @return 列对象
	 */
	public static Column create(String tableName, ResultSet columnMetaRs) {
		return new Column(tableName, columnMetaRs);
	}
	
	//----------------------------------------------------- Constructor start
	public Column() {
	}
	
	public Column(String tableName, ResultSet columnMetaRs) {
		try {
			init(tableName, columnMetaRs);
		} catch (SQLException e) {
			throw new DbRuntimeException(StrUtil.format("Get table [{}] meta info error!", tableName));
		}
	}
	//----------------------------------------------------- Constructor end
	
	/**
	 * 初始化
	 * @param tableName 表名
	 * @param columnMetaRs 列的meta ResultSet
	 * @throws SQLException
	 */
	public  void init(String tableName, ResultSet columnMetaRs) throws SQLException {
		this.tableName = tableName;
		
		this.name = columnMetaRs.getString("COLUMN_NAME");
		this.type = columnMetaRs.getInt("DATA_TYPE");
		this.size = columnMetaRs.getInt("COLUMN_SIZE");
		this.isNullable = columnMetaRs.getBoolean("NULLABLE");
	}
	
	//----------------------------------------------------- Getters and Setters start
	public String getTableName() {
		return tableName;
	}
	public void setTableName(String tableName) {
		this.tableName = tableName;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getType() {
		return type;
	}
	public void setType(int type) {
		this.type = type;
	}
	public int getSize() {
		return size;
	}
	public void setSize(int size) {
		this.size = size;
	}
	public boolean isNullable() {
		return isNullable;
	}
	public void setNullable(boolean isNullable) {
		this.isNullable = isNullable;
	}
	//----------------------------------------------------- Getters and Setters end

	@Override
	public String toString() {
		return "Column [tableName=" + tableName + ", name=" + name + ", type=" + type + ", size=" + size + ", isNullable=" + isNullable + "]";
	}
}