/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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, 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.apache.mahout.cf.taste.impl.recommender;
import org.apache.mahout.cf.taste.model.DataModel;
/**
* Simple class which encapsulates restricting a preference value
* to a predefined range. The simple logic is wrapped up here for
* performance reasons.
*/
public final class EstimatedPreferenceCapper {
private final float min;
private final float max;
public EstimatedPreferenceCapper(DataModel model) {
min = model.getMinPreference();
max = model.getMaxPreference();
}
public float capEstimate(float estimate) {
if (estimate > max) {
estimate = max;
} else if (estimate < min) {
estimate = min;
}
return estimate;
}
}