com.zeoflow.depot.solver.query.result.QueryResultBinder.kt Maven / Gradle / Ivy

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The Depot persistence library provides an abstraction layer over SQLite to allow for more robust database access while using the full power of SQLite.

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/*
 * Copyright (C) 2021 ZeoFlow SRL
 *
 * 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.zeoflow.depot.solver.query.result

import com.zeoflow.depot.solver.CodeGenScope
import com.squareup.javapoet.FieldSpec

/**
 * Connects the query, db and the ResultAdapter.
 * 
 * The default implementation is InstantResultBinder. If the query is deferred rather than executed
 * directly, such alternative implementations can be implement using this interface (e.g. LiveData,
 * Rx, caching etc)
 */
abstract class QueryResultBinder(val adapter: QueryResultAdapter?) {
    /**
     * receives the sql, bind args and adapter and generates the code that runs the query
     * and returns the result.
     */
    abstract fun convertAndReturn(
        depotSQLiteQueryVar: String,
        canReleaseQuery: Boolean, // false if query is provided by the user
        dbField: FieldSpec,
        inTransaction: Boolean,
        scope: CodeGenScope
    )
}