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/**
 * 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.
 *
 * Copyright 2012-2016 the original author or authors.
 */
package com.fitbur.assertj.util.diff;

import java.util.Arrays;
import java.util.List;

/**
 * Copy from https://code.google.com/p/java-diff-utils/.
 * 
 * Holds the information about the part of text involved in the diff process
 * 
 * 

 * Text is represented as Object[] because the diff engine is
 * capable of handling more than plain ascci. In fact, arrays or lists of any
 * type that implements {@link Object#hashCode hashCode()} and
 * {@link Object#equals equals()} correctly can be subject to
 * differencing using this library.
 * 
 * 
 * @author  target size");
    }
    for (int i = 0; i < size(); i++) {
      if (!target.get(position + i).equals(lines.get(i))) {
        throw new IllegalStateException("Incorrect Chunk: the chunk content doesn't match the target");
      }
    }
  }

  /**
   * @return the start position of chunk in the text
   */
  public int getPosition() {
    return position;
  }

  public void setLines(List lines) {
    this.lines = lines;
  }

  /**
   * @return the affected lines
   */
  public List getLines() {
    return lines;
  }

  public int size() {
    return lines.size();
  }

  /**
   * Returns the index of the last line of the chunk.
   */
  public int last() {
    return getPosition() + size() - 1;
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((lines == null) ? 0 : lines.hashCode());
    result = prime * result + position;
    result = prime * result + size();
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (obj == null)
      return false;
    if (getClass() != obj.getClass())
      return false;
    @SuppressWarnings("rawtypes")
    Chunk other = (Chunk) obj;
    if (lines == null) {
      if (other.lines != null)
        return false;
    } else if (!lines.equals(other.lines))
      return false;
    return position == other.position;
  }

  @Override
  public String toString() {
    return "[position: " + position + ", size: " + size() + ", lines: " + lines + "]";
  }

}