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flat file utilities.

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/*
 * Copyright 2015 Objectos, Fábrica de Software LTDA.
 *
 * 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 br.com.objectos.io.flat;

import java.util.List;
import java.util.Objects;
import java.util.Optional;

/**
 * @author [email protected] (Marcio Endo)
 */
public abstract class Result {

  Result() {
  }

  public static  Result empty(Line line) {
    return new EmptyResult<>(line);
  }

  public static  Result> mixed(List value, List parseErrorList) {
    Objects.requireNonNull(value);
    return new MixedResult<>(value, parseErrorList);
  }

  public static  Result of(T value) {
    Objects.requireNonNull(value);
    return new PresentResult<>(value);
  }

  public static  Result ofException(Line line, Exception e) {
    Objects.requireNonNull(e);
    return new ExceptionResult<>(line, e);
  }

  public static  Result ofException(RecordParseException e) {
    Objects.requireNonNull(e);
    return new RecordParseExceptionResult<>(e);
  }

  public abstract void addParseErrorTo(List parseErrorList);

  public abstract T get();

  public T list() {
    throw new UnsupportedOperationException();
  }

  public Optional optional() {
    return Optional.empty();
  }

}