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/*
 * Copyright 2000-2021 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 jetbrains.coverage.report;

import org.jetbrains.annotations.Nullable;

/**
 * Single statistics entry
 */
public class StatEntry extends Entry {
  private Entry myPrevValue;

  public StatEntry(int total, int covered) {
    this(total, covered, null);
  }

  public StatEntry(int total, int covered, @Nullable Entry prevValue) {
    super(total, covered);

    myPrevValue = prevValue;
  }

  /**
   * Returns diff with previous value if such value is available or null
   * @return see above
   */
  @Nullable 
  public DiffEntry getDiff() {
    if (myPrevValue == null) return null;
    return new DiffEntry(myPrevValue, this);
  }
}