/*
 * Copyright (C) 2017 Julien Viet
 *
 * 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 io.vertx.sqlclient.impl;

import io.vertx.sqlclient.SqlResult;
import io.vertx.core.AsyncResult;
import io.vertx.core.Handler;

import java.util.function.Function;

A query result handler for building a SqlResult.
/** * A query result handler for building a {@link SqlResult}. */
public class SqlResultBuilder<T, R extends SqlResultBase<T, R>, L extends SqlResult<T>> implements QueryResultHandler<T>, Handler<AsyncResult<Boolean>> { private final Handler<AsyncResult<L>> handler; private final Function<T, R> factory; private R first; private boolean suspended; SqlResultBuilder(Function<T, R> factory, Handler<AsyncResult<L>> handler) { this.factory = factory; this.handler = handler; } @Override public void handleResult(int updatedCount, int size, RowDesc desc, T result) { R r = factory.apply(result); r.updated = updatedCount; r.size = size; r.columnNames = desc != null ? desc.columnNames() : null; handleResult(r); } private void handleResult(R result) { if (first == null) { first = result; } else { R h = first; while (h.next != null) { h = h.next; } h.next = result; } } @Override public void handle(AsyncResult<Boolean> res) { suspended = res.succeeded() && res.result(); handler.handle((AsyncResult<L>) res.map(first)); } public boolean isSuspended() { return suspended; } }