96 lines
3.3 KiB
Java
96 lines
3.3 KiB
Java
/*
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* Copyright 2015 Christian Basler
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package ch.dissem.apps.abit.repository;
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import android.content.Context;
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import android.database.sqlite.SQLiteDatabase;
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import android.database.sqlite.SQLiteOpenHelper;
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import ch.dissem.apps.abit.util.Assets;
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/**
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* Handles database migration and provides access.
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*/
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public class SqlHelper extends SQLiteOpenHelper {
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// If you change the database schema, you must increment the database version.
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private static final int DATABASE_VERSION = 7;
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private static final String DATABASE_NAME = "jabit.db";
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private final Context ctx;
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public SqlHelper(Context ctx) {
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super(ctx, DATABASE_NAME, null, DATABASE_VERSION);
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this.ctx = ctx;
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}
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@Override
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public void onCreate(SQLiteDatabase db) {
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onUpgrade(db, 0, DATABASE_VERSION);
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}
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@Override
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public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
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switch (oldVersion) {
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case 0:
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executeMigration(db, "V1.0__Create_table_inventory");
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executeMigration(db, "V1.1__Create_table_address");
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executeMigration(db, "V1.2__Create_table_message");
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case 1:
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// executeMigration(db, "V2.0__Update_table_message");
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executeMigration(db, "V2.1__Create_table_POW");
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case 2:
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executeMigration(db, "V3.0__Update_table_address");
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case 3:
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executeMigration(db, "V3.1__Update_table_POW");
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executeMigration(db, "V3.2__Update_table_message");
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case 4:
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executeMigration(db, "V3.3__Create_table_node");
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case 5:
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executeMigration(db, "V3.4__Add_label_outbox");
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case 6:
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executeMigration(db, "V4.0__Create_table_message_parent");
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default:
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// Nothing to do. Let's assume we won't upgrade from a version that's newer than
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// DATABASE_VERSION.
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}
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}
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private void executeMigration(SQLiteDatabase db, String name) {
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for (String statement : Assets.readSqlStatements(ctx, "db/migration/" + name + ".sql")) {
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db.execSQL(statement);
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}
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}
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static StringBuilder join(long... numbers) {
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StringBuilder streamList = new StringBuilder();
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for (int i = 0; i < numbers.length; i++) {
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if (i > 0) streamList.append(", ");
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streamList.append(numbers[i]);
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}
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return streamList;
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}
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static StringBuilder join(Enum<?>... types) {
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StringBuilder streamList = new StringBuilder();
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for (int i = 0; i < types.length; i++) {
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if (i > 0) streamList.append(", ");
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streamList.append('\'').append(types[i].name()).append('\'');
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}
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return streamList;
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}
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}
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