程序包 cn.smallbun.screw.core.query

类 AbstractDatabaseQuery

java.lang.Object

cn.smallbun.screw.core.query.AbstractDatabaseQuery

所有已实现的接口:

DatabaseQuery, Serializable

直接已知子类:

CacheDbDataBaseQuery, Db2DataBaseQuery, DmDataBaseQuery, H2DataBaseQuery, HigHgoDataBaseQuery, HsqlDataBaseQuery, MariaDbDataBaseQuery, MySqlDataBaseQuery, OracleDataBaseQuery, OtherDataBaseQuery, PhoenixDataBaseQuery, PostgreSqlDataBaseQuery, SqliteDataBaseQuery, SqlServerDataBaseQuery

public abstract class AbstractDatabaseQuery
extends Object
implements DatabaseQuery

AbstractDataBaseQuery

作者:

SanLi Created by qinggang.zuo@gmail.com / 2689170096@qq.com on 2020/3/18 12:50

另请参阅:

• 序列化表格

字段概要

字段

修饰符和类型	字段	说明
protected final Map<String,List<Column>>	columnsCaching	缓存
protected Connection	connection	Connection 双重锁，线程安全
private final DataSource	dataSource	DataSource

构造器概要

构造器

构造器	说明
AbstractDatabaseQuery(DataSource dataSource)

方法概要

修饰符和类型	方法	说明
protected String	getCatalog()	获取 getCatalog
private Connection	getConnection()	获取连接对象，单例模式，采用双重锁检查
protected DatabaseMetaData	getMetaData()	获取 DatabaseMetaData
List<? extends PrimaryKey>	getPrimaryKeys()	根据表名获取主键
protected String	getSchema()	获取 getSchema
protected PreparedStatement	prepareStatement(String sql)	准备声明
private String	verifySchema(DataSource dataSource)	验证Schema

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 cn.smallbun.screw.core.query.DatabaseQuery

getDataBase, getPrimaryKeys, getTableColumns, getTableColumns, getTables

字段详细资料

columnsCaching

protected final Map<String,List<Column>> columnsCaching

缓存

dataSource

private final DataSource dataSource

DataSource

connection

protected volatile Connection connection

Connection 双重锁，线程安全

构造器详细资料

AbstractDatabaseQuery

public AbstractDatabaseQuery(DataSource dataSource)

方法详细资料

getConnection

private Connection getConnection()
                          throws QueryException

获取连接对象，单例模式，采用双重锁检查

返回:

Connection

抛出:

QueryException - QueryException

getCatalog

protected String getCatalog()
                     throws QueryException

获取 getCatalog

返回:

String

抛出:

QueryException - QueryException

getSchema

protected String getSchema()
                    throws QueryException

获取 getSchema

返回:

String

抛出:

QueryException - QueryException

verifySchema

private String verifySchema(DataSource dataSource)
                     throws SQLException

验证Schema

参数:

dataSource - DataSource

返回:

Schema

抛出:

SQLException

getMetaData

protected DatabaseMetaData getMetaData()
                                throws QueryException

获取 DatabaseMetaData

返回:

DatabaseMetaData

抛出:

QueryException - QueryException

prepareStatement

protected PreparedStatement prepareStatement(String sql)
                                      throws QueryException

准备声明

参数:

sql - String SQL

返回:

PreparedStatement

抛出:

QueryException - QueryException

getPrimaryKeys

public List<? extends PrimaryKey> getPrimaryKeys()
                                          throws QueryException

根据表名获取主键

指定者:

getPrimaryKeys 在接口中 DatabaseQuery

返回:

List

抛出:

QueryException - QueryException