com.zeoflow.depot.solver.query.result.ArrayQueryResultAdapter.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.ext.L
import com.zeoflow.depot.ext.T
import com.zeoflow.depot.solver.CodeGenScope
import com.squareup.javapoet.ArrayTypeName
import com.squareup.javapoet.TypeName

class ArrayQueryResultAdapter(rowAdapter: RowAdapter) : QueryResultAdapter(rowAdapter) {
    val type = rowAdapter.out
    override fun convert(outVarName: String, cursorVarName: String, scope: CodeGenScope) {
        scope.builder().apply {
            rowAdapter?.onCursorReady(cursorVarName, scope)

            val arrayType = ArrayTypeName.of(type.typeName)
            addStatement(
                "final $T $L = new $T[$L.getCount()]",
                arrayType, outVarName, type.typeName, cursorVarName
            )
            val tmpVarName = scope.getTmpVar("_item")
            val indexVar = scope.getTmpVar("_index")
            addStatement("$T $L = 0", TypeName.INT, indexVar)
            beginControlFlow("while($L.moveToNext())", cursorVarName).apply {
                addStatement("final $T $L", type.typeName, tmpVarName)
                rowAdapter?.convert(tmpVarName, cursorVarName, scope)
                addStatement("$L[$L] = $L", outVarName, indexVar, tmpVarName)
                addStatement("$L ++", indexVar)
            }
            endControlFlow()
            rowAdapter?.onCursorFinished()?.invoke(scope)
        }
    }
}