Package org.nervousync.database.query.core

Class QueryItem

java.lang.Object

org.nervousync.database.query.core.QueryItem

Direct Known Subclasses:

QueryItem.QueryColumn, QueryItem.QueryConstant, QueryItem.QueryFunction

public abstract class QueryItem
extends Object

The type Query item.

Version:

$Revision : 1.0 $ $Date: 10/9/2020 11:30 AM $

Author:

Steven Wee wmkm0113@Hotmail.com

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	QueryItem.ItemType	The enum Item type.
static final class	QueryItem.QueryColumn	The type Query column.
static final class	QueryItem.QueryConstant	The type Query constant.
static final class	QueryItem.QueryFunction	The type Query function.

Method Summary

Modifier and Type	Method	Description
abstract String	cacheKey()
String	getAliasName()	Gets the value of aliasName
QueryItem.ItemType	getItemType()	Gets the value of itemType
abstract boolean	match(QueryItem queryItem)	Match boolean.
static QueryItem.QueryColumn	queryColumn(String identifyKey, boolean distinct, String aliasName)	Create query column.
static QueryItem.QueryConstant	queryConstant(Object constantValue)	Query constant query constant.
static QueryItem.QueryFunction	queryFunction(String aliasName, String sqlFunction, QueryItem... functionParams)	Create query function.

Methods inherited from class java.lang.Object

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

Method Details

queryColumn

public static QueryItem.QueryColumn queryColumn(String identifyKey,
 boolean distinct,
 String aliasName)

Create query column.

Parameters:

identifyKey - the identify key

distinct - the distinct

aliasName - the alias name

Returns:

the query column

queryConstant

public static QueryItem.QueryConstant queryConstant(Object constantValue)

Query constant query constant.

Parameters:

constantValue - the constant value

Returns:

the query constant

queryFunction

public static QueryItem.QueryFunction queryFunction(String aliasName,
 String sqlFunction,
 QueryItem... functionParams)

Create query function.

Parameters:

aliasName - the alias name

sqlFunction - the sql function

functionParams - the function params

Returns:

the query function

Throws:

QueryException - the query exception

getItemType

public QueryItem.ItemType getItemType()

Gets the value of itemType

Returns:

the value of itemType

getAliasName

public String getAliasName()

Gets the value of aliasName

Returns:

the value of aliasName

match

public abstract boolean match(QueryItem queryItem)

Match boolean.

Parameters:

queryItem - the query item

Returns:

the boolean

cacheKey

public abstract String cacheKey()