com.zeoflow.depot.solver.query.result.QueryResultAdapter.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

/**
 * Gets a Cursor and converts it into the return type of a method annotated with @Query.
 */
abstract class QueryResultAdapter(val rowAdapter: RowAdapter?) {

    abstract fun convert(outVarName: String, cursorVarName: String, scope: CodeGenScope)

    // indicates whether the cursor should be copied before converting
    open fun shouldCopyCursor() = rowAdapter is PojoRowAdapter &&
        rowAdapter.relationCollectors.isNotEmpty()

    fun accessedTableNames(): List {
        return (rowAdapter as? PojoRowAdapter)?.relationTableNames() ?: emptyList()
    }
}