com.zeoflow.depot.solver.query.parameter.CollectionQueryParameterAdapter.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.parameter

import com.zeoflow.depot.ext.L
import com.zeoflow.depot.ext.T
import com.zeoflow.depot.solver.CodeGenScope
import com.zeoflow.depot.solver.types.StatementValueBinder
import com.squareup.javapoet.TypeName

/**
 * Binds Collection (e.g. List) into String[] query args.
 */
class CollectionQueryParameterAdapter(val bindAdapter: StatementValueBinder) :
    QueryParameterAdapter(true) {
    override fun bindToStmt(
        inputVarName: String,
        stmtVarName: String,
        startIndexVarName: String,
        scope: CodeGenScope
    ) {
        scope.builder().apply {
            val itrVar = scope.getTmpVar("_item")
            beginControlFlow(
                "for ($T $L : $L)", bindAdapter.typeMirror().typeName, itrVar,
                inputVarName
            ).apply {
                bindAdapter.bindToStmt(stmtVarName, startIndexVarName, itrVar, scope)
                addStatement("$L ++", startIndexVarName)
            }
            endControlFlow()
        }
    }

    override fun getArgCount(inputVarName: String, outputVarName: String, scope: CodeGenScope) {
        scope.builder()
            .addStatement("final $T $L = $L.size()", TypeName.INT, outputVarName, inputVarName)
    }
}