FunctionBasedColumnNameBuilderFactory.java

/**
 * diqube: Distributed Query Base.
 *
 * Copyright (C) 2015 Bastian Gloeckle
 *
 * This file is part of diqube.
 *
 * diqube is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.diqube.name;

import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

import javax.inject.Inject;

import org.diqube.context.AutoInstatiate;
import org.diqube.function.FunctionFactory;

/**
 * Factory for {@link FunctionBasedColumnNameBuilder}.
 *
 * @author Bastian Gloeckle
 */
@AutoInstatiate
public class FunctionBasedColumnNameBuilderFactory {

  @Inject
  private RepeatedColumnNameGenerator repeatedCols;

  @Inject
  private FunctionFactory functionFactory;

  private ConcurrentMap<String, List<List<Integer>>> exchangeableIndexCache = new ConcurrentHashMap<>();

  public FunctionBasedColumnNameBuilder create() {
    return new FunctionBasedColumnNameBuilder(repeatedCols, functionFactory, exchangeableIndexCache);
  }
}