Rename .java to .kt

app/src/main/java/com/hippo/database/MSQLiteOpenHelper.kt

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2017 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.database;
+
+/*
+ * Created by Hippo on 2017/9/4.
+ */
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+import com.hippo.util.SqlUtils;
+
+class MSQLiteOpenHelper extends SQLiteOpenHelper {
+
+    private final int version;
+    private final MSQLiteBuilder builder;
+
+    public MSQLiteOpenHelper(Context context, String name, int version, MSQLiteBuilder builder) {
+        super(context, name, null, version);
+        this.version = version;
+        this.builder = builder;
+    }
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        onUpgrade(db, 0, version);
+    }
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        for (String command : builder.getStatements(oldVersion, newVersion)) {
+            db.execSQL(command);
+        }
+    }
+
+    @Override
+    public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        SqlUtils.dropAllTable(db);
+        onCreate(db);
+    }
+}