AndroidDatabaseConnection.kt

/*
 * Copyright (C) 2022 Ctrip.com.
 *
 * 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.ctrip.sqllin.driver

import android.database.sqlite.SQLiteCursor
import android.database.sqlite.SQLiteDatabase
import android.database.sqlite.SQLiteQuery

/**
 * Android implementation of [DatabaseConnection] using Android's SQLiteDatabase.
 *
 * @author Yuang Qiao
 */
internal class AndroidDatabaseConnection(private val database: SQLiteDatabase) : DatabaseConnection {

    override fun execSQL(sql: String, bindParams: Array<out Any?>?) =
        if (bindParams == null)
            database.execSQL(sql)
        else
            database.execSQL(sql, bindParams)

    override fun executeInsert(sql: String, bindParams: Array<out Any?>?) = execSQL(sql, bindParams)

    override fun executeUpdateDelete(sql: String, bindParams: Array<out Any?>?) = execSQL(sql, bindParams)

    override fun query(sql: String, bindParams: Array<out Any?>?): CommonCursor {
        val cursor = if (bindParams == null) {
            database.rawQuery(sql, null)
        } else {
            // Use rawQueryWithFactory to bind parameters with proper types
            // This allows us to bind parameters with their actual types (Int, Long, Double, etc.)
            // instead of converting everything to String like rawQuery does
            val cursorFactory = SQLiteDatabase.CursorFactory { _, masterQuery, editTable, query ->
                bindTypedParameters(query, bindParams)
                SQLiteCursor(masterQuery, editTable, query)
            }
            // Pass emptyArray() for selectionArgs since we bind parameters via the factory
            // Use empty string for editTable since it's only needed for updateable cursors
            database.rawQueryWithFactory(cursorFactory, sql, null, "")
        }
        return AndroidCursor(cursor)
    }

    /**
     * Binds parameters to SQLiteQuery with proper type handling.
     *
     * Unlike rawQuery which only accepts String[], this method binds parameters
     * with their actual types (Long, Double, ByteArray, etc.) to ensure correct
     * SQLite type affinity and comparisons.
     */
    private fun bindTypedParameters(query: SQLiteQuery, bindParams: Array<out Any?>) {
        bindParams.forEachIndexed { index, param ->
            val position = index + 1 // SQLite bind positions are 1-based
            when (param) {
                null -> query.bindNull(position)
                is ByteArray -> query.bindBlob(position, param)
                is Double -> query.bindDouble(position, param)
                is Float -> query.bindDouble(position, param.toDouble())
                is Long -> query.bindLong(position, param)
                is Int -> query.bindLong(position, param.toLong())
                is Short -> query.bindLong(position, param.toLong())
                is Byte -> query.bindLong(position, param.toLong())
                is Boolean -> query.bindLong(position, if (param) 1L else 0L)
                is ULong -> query.bindLong(position, param.toLong())
                is UInt -> query.bindLong(position, param.toLong())
                is UShort -> query.bindLong(position, param.toLong())
                is UByte -> query.bindLong(position, param.toLong())
                else -> query.bindString(position, param.toString())
            }
        }
    }

    override fun beginTransaction() = database.beginTransaction()
    override fun endTransaction() = database.endTransaction()
    override fun setTransactionSuccessful() = database.setTransactionSuccessful()

    override fun close() = database.close()

    override val isClosed: Boolean
        get() = !database.isOpen
}