com.komect.network.litepal.tablemanager

类 Dropper

java.lang.Object

com.komect.network.litepal.LitePalBase

com.komect.network.litepal.tablemanager.Generator

com.komect.network.litepal.tablemanager.AssociationCreator

com.komect.network.litepal.tablemanager.AssociationUpdater

com.komect.network.litepal.tablemanager.Dropper

public class Dropper
extends AssociationUpdater

When developers defined some model classes and define them in the mapping list. All corresponding tables will be created automatically. But developers might realize some model classes are useless or can be optimized to remove, and they somehow drop the model classes. If the tables are still in the database, it will be a mess soon. So this class helps do the dropping job. Keep developers' database synchronized and clean.

从以下版本开始:

1.0

作者:

Tony Green

字段概要

从类继承的字段 com.komect.network.litepal.tablemanager.AssociationUpdater

mDb, TAG

构造器概要

构造器

构造器和说明
Dropper()

方法概要

限定符和类型	方法和说明
protected void	createOrUpgradeTable(android.database.sqlite.SQLiteDatabase db, boolean force) Analyzing the table model, to see which tables has no model classes anymore and can be dropped.
protected void	createOrUpgradeTable(TableModel tableModel, android.database.sqlite.SQLiteDatabase db, boolean force)
protected java.util.List<java.lang.String>	getCreateTableSQLs(TableModel tableModel, android.database.sqlite.SQLiteDatabase db, boolean force) When creating a new table, it should always try to drop the same name table if exists.

从类继承的方法 com.komect.network.litepal.tablemanager.AssociationUpdater

addOrUpdateAssociation, clearCopyInTableSchema, dropTables, generateAlterToTempTableSQL, generateDataMigrationSQL, generateDropTempTableSQL, getForeignKeyColumns, getTableModelFromDB, getTempTableName, isForeignKeyColumn, removeColumns

从类继承的方法 com.komect.network.litepal.tablemanager.AssociationCreator

addForeignKeyColumn, generateAddColumnSQL, generateCreateTableSQL, generateDropTableSQL, giveTableSchemaACopy, isForeignKeyColumnFormat

从类继承的方法 com.komect.network.litepal.tablemanager.Generator

execute, getAllAssociations, getAllTableModels

从类继承的方法 com.komect.network.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

构造器详细资料

Dropper

public Dropper()

方法详细资料

createOrUpgradeTable

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

Analyzing the table model, to see which tables has no model classes anymore and can be dropped.

指定者:

createOrUpgradeTable 在类中 AssociationUpdater

参数:

db - Instance of SQLiteDatabase.

force - Drop the table first if it already exists.

createOrUpgradeTable

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

getCreateTableSQLs

protected java.util.List<java.lang.String> getCreateTableSQLs(TableModel tableModel,
                                                              android.database.sqlite.SQLiteDatabase db,
                                                              boolean force)

When creating a new table, it should always try to drop the same name table if exists. This method create a SQL array for the whole create table job.

参数:

tableModel - The table model.

db - Instance of SQLiteDatabase.

force - Drop the table first if it already exists.

返回:

A SQL array contains drop table if it exists and create new table.