org.powertac.factoredcustomer.CustomerFactory Maven / Gradle / Ivy

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/*
 * Copyright 2011 the original author or authors.
 *
 * 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 org.powertac.factoredcustomer;

import org.powertac.common.state.Domain;
import org.powertac.common.state.StateChange;
import org.powertac.factoredcustomer.interfaces.FactoredCustomer;

import java.util.HashMap;
import java.util.Map;


/**
 * Register CustomerCategory-specific creators.  Creators implement the nested
 * public interface @code{CustomerCreator}.
 *
 * @author Prashant Reddy
 */
@Domain
final class CustomerFactory
{
  public interface CustomerCreator
  {
    public String getKey ();

    public FactoredCustomer createModel (CustomerStructure customerStructure);
  }

  private CustomerCreator defaultCreator;
  private Map customerCreators = new HashMap<>();

  @StateChange
  void registerDefaultCreator (CustomerCreator creator)
  {
    defaultCreator = creator;
  }

  @StateChange
  void registerCreator (CustomerCreator creator)
  {
    registerCreator(creator.getKey(), creator);
  }

  @StateChange
  private void registerCreator (String key, CustomerCreator creator)
  {
    customerCreators.put(key, creator);
  }

  FactoredCustomer processStructure (CustomerStructure customerStructure)
  {
    if (customerStructure.getCreatorKey() == null ||
        customerStructure.getCreatorKey().trim().isEmpty()) {
      return defaultCreator.createModel(customerStructure);
    }

    CustomerCreator creator =
        customerCreators.get(customerStructure.getCreatorKey());
    if (creator != null) {
      return creator.createModel(customerStructure);
    }

    throw new Error(
        "CustomerFactory does not have a registered creator for key: "
            + customerStructure.getCreatorKey());
  }
}