/*
 * Copyright 2000-2013 JetBrains s.r.o.
 *
 * 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 com.intellij.vcs.log;

import org.jetbrains.annotations.NotNull;

/**
 * @author Kirill Likhodedov
 */
public class SimpleHash implements Hash {

  private final String myHash;

  public SimpleHash(String hash) {
    myHash = hash;
  }

  @NotNull
  @Override
  public String asString() {
    return myHash;
  }

  @NotNull
  @Override
  public String toShortString() {
    return myHash.substring(0, 7);
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;

    SimpleHash that = (SimpleHash)o;

    if (myHash != null ? !myHash.equals(that.myHash) : that.myHash != null) return false;

    return true;
  }

  @Override
  public int hashCode() {
    return myHash != null ? myHash.hashCode() : 0;
  }

}