org.pinus4j.api.query

Class QueryImpl

java.lang.Object

org.pinus4j.api.query.QueryImpl

All Implemented Interfaces:

Cloneable, IQuery

public class QueryImpl
extends Object
implements IQuery, Cloneable

查询对象实现.

Author:

duanbn

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	QueryImpl.OrderBy 排序条件.

Field Summary

Fields

Modifier and Type	Field and Description
private List<Condition>	condList 保存查询条件.
private String[]	fields 保存取值的字段.
private int	limit 分页大小
private List<QueryImpl.OrderBy>	orderList 保存排序条件
private int	start 分页开始偏移量

Constructor Summary

Constructors

Constructor and Description
QueryImpl()

Method Summary

Modifier and Type	Method and Description
IQuery	add(Condition cond) 添加查询条件.
IQuery	clone() 获取此对象的复制对象.
String[]	getFields() 获取取值字段.
String	getWhereSql() 返回查询条件的sql语句.
boolean	hasQueryFields() 判断是否有查询字段.
IQuery	limit(int limit) 设置limit参数
IQuery	limit(int start, int limit) 分页参数.
IQuery	orderBy(String field, Order order) 添加排序字段.
void	setCondList(List<Condition> condList)
IQuery	setFields(String... fields) 添加取值字段.
void	setLimit(int limit)
void	setOrderList(List<QueryImpl.OrderBy> orderList)
void	setStart(int start)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

fields

private String[] fields

保存取值的字段.

condList

private List<Condition> condList

保存查询条件.

orderList

private List<QueryImpl.OrderBy> orderList

保存排序条件

start

private int start

分页开始偏移量

limit

private int limit

分页大小

Constructor Detail

QueryImpl

public QueryImpl()

Method Detail

hasQueryFields

public boolean hasQueryFields()

Description copied from interface: IQuery

判断是否有查询字段.

Specified by:

hasQueryFields in interface IQuery

clone

public IQuery clone()

Description copied from interface: IQuery

获取此对象的复制对象.

Specified by:

clone in interface IQuery

Overrides:

clone in class Object

Returns:

此对象实例的复制

setFields

public IQuery setFields(String... fields)

Description copied from interface: IQuery

添加取值字段.

Specified by:

setFields in interface IQuery

Parameters:

fields - 获取值的字段

Returns:

getFields

public String[] getFields()

Description copied from interface: IQuery

获取取值字段.

Specified by:

getFields in interface IQuery

Returns:

getWhereSql

public String getWhereSql()

Description copied from interface: IQuery

返回查询条件的sql语句.

Specified by:

getWhereSql in interface IQuery

Returns:

查询条件sql

add

public IQuery add(Condition cond)

Description copied from interface: IQuery

添加查询条件.

Specified by:

add in interface IQuery

Parameters:

cond - 一个查询条件

orderBy

public IQuery orderBy(String field,
                      Order order)

Description copied from interface: IQuery

添加排序字段.

Specified by:

orderBy in interface IQuery

Parameters:

field - 被排序字段

order - 升序降序

limit

public IQuery limit(int start,
                    int limit)

Description copied from interface: IQuery

分页参数.

Specified by:

limit in interface IQuery

Parameters:

start - 开始偏移量

limit - 页大小

limit

public IQuery limit(int limit)

Description copied from interface: IQuery

设置limit参数

Specified by:

limit in interface IQuery

Parameters:

limit - limit

toString

public String toString()

Overrides:

toString in class Object

setCondList

public void setCondList(List<Condition> condList)

setOrderList

public void setOrderList(List<QueryImpl.OrderBy> orderList)

setStart

public void setStart(int start)

setLimit

public void setLimit(int limit)