br.com.objectos.io.flat.FlatEnumField Maven / Gradle / Ivy

Go to download
/*
 * 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 static br.com.objectos.io.flat.TextTransformation.LEFT_ALIGN;
import static br.com.objectos.io.flat.TextTransformation.TRUNCATE;

import java.io.IOException;
import java.util.EnumSet;
import java.util.Set;

import com.google.common.base.Preconditions;

/**
 * @author [email protected] (Marcio Endo)
 */
class FlatEnumField extends Field {

  private static final Set SET = EnumSet.of(TRUNCATE, LEFT_ALIGN);

  private final FlatEnum value;
  private final int length;

  private FlatEnumField(FlatEnum value, int length) {
    this.value = value;
    this.length = length;
  }

  public static FlatEnumField get(Enum value, int length) {
    Preconditions.checkArgument(value instanceof FlatEnum, "Enum must implement FlatEnum interface");
    FlatEnum flatEnum = (FlatEnum) value;
    return new FlatEnumField(flatEnum, length);
  }

  @Override
  void tryToWriteTo(FlatAppendable out) throws IOException {
    String text = value.flatValue();

    for (TextTransformation transformation : SET) {
      text = transformation.apply(text, length);
    }

    out.append(text);
  }

}