org.litepal.tablemanager

类 Generator

java.lang.Object

org.litepal.LitePalBase

org.litepal.tablemanager.Generator

直接已知子类:

AssociationCreator

public abstract class Generator
extends LitePalBase

This class is the basic class for managing database dynamically. It is used to create or update tables by the mapping classes from litepal.xml file. Generator is a superclass, it just read the fields from classes and format the fields types into database types. The analysis job is delegated to the subclasses to do. Then subclasses can invoke the execute method to finish the job or they can override to do their own logic.

从以下版本开始:

1.0

字段概要

字段

限定符和类型	字段和说明
static java.lang.String	TAG

构造器概要

构造器

构造器和说明
Generator()

方法概要

限定符和类型	方法和说明
protected abstract void	addOrUpdateAssociation(android.database.sqlite.SQLiteDatabase db, boolean force) Analysis the AssociationsModel by the purpose of subclasses, and generate a SQL to do the intention job.
protected abstract void	createOrUpgradeTable(android.database.sqlite.SQLiteDatabase db, boolean force) Analysis the TableModel by the purpose of subclasses, and generate a SQL to do the intention job.
protected void	execute(java.lang.String[] sqls, android.database.sqlite.SQLiteDatabase db) Use the parameter SQLiteDatabase to execute the passing SQLs.
protected java.util.Collection<AssociationsModel>	getAllAssociations() This method is used to get all the association models which in the mapping list of litepal.xml file.
protected java.util.Collection<TableModel>	getAllTableModels() This is a shortcut way to get all the table models for each model class defined in the mapping list.

从类继承的方法 org.litepal.LitePalBase

getAssociationInfo, getAssociations, getColumnType, getForeignKeyColumnName, getGenericModels, getGenericTypeClass, getGenericTypeName, getSupportedFields, getSupportedGenericFields, getTableModel, isCollection, isIdColumn, isList, isSet

从类继承的方法 java.lang.Object

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

字段详细资料

TAG

public static final java.lang.String TAG

另请参阅:

常量字段值

构造器详细资料

Generator

public Generator()

方法详细资料

getAllTableModels

protected java.util.Collection<TableModel> getAllTableModels()

This is a shortcut way to get all the table models for each model class defined in the mapping list. No need to iterate all the model classes and get table model for each one.

返回:

A collection contains all table models.

getAllAssociations

protected java.util.Collection<AssociationsModel> getAllAssociations()

This method is used to get all the association models which in the mapping list of litepal.xml file.

返回:

Collection of RelationModel for all the mapping classes.

execute

protected void execute(java.lang.String[] sqls,
                       android.database.sqlite.SQLiteDatabase db)

Use the parameter SQLiteDatabase to execute the passing SQLs. Subclasses can add their own logic when do the executing job by overriding this method.

参数:

sqls - SQLs that want to execute.

db - instance of SQLiteDatabase

抛出:

DatabaseGenerateException

createOrUpgradeTable

protected abstract void createOrUpgradeTable(android.database.sqlite.SQLiteDatabase db,
                                             boolean force)

Analysis the TableModel by the purpose of subclasses, and generate a SQL to do the intention job. The implementation of this method is totally delegated to the subclasses.

参数:

db - Instance of SQLiteDatabase.

force - Drop the table first if it already exists.

addOrUpdateAssociation

protected abstract void addOrUpdateAssociation(android.database.sqlite.SQLiteDatabase db,
                                               boolean force)

Analysis the AssociationsModel by the purpose of subclasses, and generate a SQL to do the intention job. The implementation of this method is totally delegated to the subclasses.

参数:

db - Instance of SQLiteDatabase.

force - Drop the table first if it already exists.