org.openqa.grid.internal.listeners.Prioritizer Maven / Gradle / Ivy

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// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The SFC licenses this file
// to you 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,
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// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

package org.openqa.grid.internal.listeners;

import java.util.Map;

public interface Prioritizer {

  /**
   * priority of a is lower than b : compare(a,b) > 0
   * 
   * priority of b is lower than a : compare(a,b) < 0
   * 
   * a and b have the same priority : compare(a,b) = 0
   *
   * @param a first item
   * @param b second item
   * @return a negative number is a is less important than b, a positive number is a is more
   *         important than b, 0 if a and b are equally as important.
   */
  public int compareTo(Map a, Map b);
}