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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.Arrays;

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

  private final int number;
  private final String text;

  public Line(int number, String text) {
    this.number = number;
    this.text = text;
  }

  public int number() {
    return number;
  }

  public String text() {
    return text;
  }

  @Override
  public String toString() {
    return String.format("%05d: %s", number, text);
  }

  int length() {
    return text.length();
  }

  String substring(int index, int endIndex) {
    int length = endIndex - index;
    if (text == null) {
      return blank(length);
    }

    if (index >= text.length()) {
      return blank(length);
    }

    if (endIndex > text.length()) {
      String substring = text.substring(index);
      return substring + blank(length - substring.length());
    }

    return text.substring(index, endIndex);
  }

  private String blank(int size) {
    char[] array = new char[size];
    Arrays.fill(array, ' ');
    return new String(array);
  }

}