/*
 * Copyright (c) 2014 Red Hat, Inc. and others
 *
 * Red Hat licenses this file to you 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.config.impl.spi;

import io.vertx.config.spi.ConfigStore;
import io.vertx.core.AsyncResult;
import io.vertx.core.Future;
import io.vertx.core.Handler;
import io.vertx.core.Vertx;
import io.vertx.core.buffer.Buffer;
import io.vertx.core.json.JsonObject;

/**
 * A configuration store loading a file.
 *
 * @author <a href="http://escoffier.me">Clement Escoffier</a>
 */
public class FileConfigStore implements ConfigStore {
  private Vertx vertx;

  private String path;

  public FileConfigStore(Vertx vertx, JsonObject configuration) {
    this.vertx = vertx;
    this.path = configuration.getString("path");
    if (this.path == null) {
      throw new IllegalArgumentException("The `path` configuration is required.");
    }
  }

  @Override
  public void get(Handler<AsyncResult<Buffer>> completionHandler) {
    vertx.fileSystem().readFile(path, completionHandler);
  }
}
