/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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 org.apache.accumulo.core.sample.impl;

import java.io.IOException;

import org.apache.accumulo.core.client.sample.Sampler;
import org.apache.accumulo.core.conf.AccumuloConfiguration;
import org.apache.accumulo.core.conf.Property;
import org.apache.accumulo.start.classloader.vfs.AccumuloVFSClassLoader;

public class SamplerFactory {
  public static Sampler newSampler(SamplerConfigurationImpl config, AccumuloConfiguration acuconf, boolean useAccumuloStart) throws IOException {
    String context = acuconf.get(Property.TABLE_CLASSPATH);

    Class<? extends Sampler> clazz;
    try {
      if (!useAccumuloStart)
        clazz = SamplerFactory.class.getClassLoader().loadClass(config.getClassName()).asSubclass(Sampler.class);
      if (context != null && !context.equals(""))
        clazz = AccumuloVFSClassLoader.getContextManager().loadClass(context, config.getClassName(), Sampler.class);
      else
        clazz = AccumuloVFSClassLoader.loadClass(config.getClassName(), Sampler.class);

      Sampler sampler = clazz.newInstance();

      sampler.init(config.toSamplerConfiguration());

      return sampler;

    } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
      throw new RuntimeException(e);
    }
  }

  public static Sampler newSampler(SamplerConfigurationImpl config, AccumuloConfiguration acuconf) throws IOException {
    return newSampler(config, acuconf, true);
  }
}