/**
 * Copyright (C) 2011 Brian Ferris <bdferris@onebusaway.org>
 *
 * 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 org.onebusaway.utility;

/**
 * Defines an interpolation strategy for key-value pairs of arbitrary type. For
 * use in
 * {@link InterpolationLibrary#interpolate(InterpolationStrategy, EOutOfRangeStrategy, java.util.SortedMap, Number)}
 * 
 * .
 * 
 * @author bdferris
 * @see InterpolationLibrary#interpolate(InterpolationStrategy,
 *      EOutOfRangeStrategy, java.util.SortedMap, Number)
 */
public interface InterpolationStrategy<KEY extends Number, VALUE> {
  public VALUE interpolate(KEY prevKey, VALUE prevValue, KEY nextKey,
      VALUE nextValue, double ratio);
}
