java/com/android/incallui/answer/impl/classifier/EndPointRatioClassifier.java


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/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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.android.incallui.answer.impl.classifier;

/**
 * A classifier which looks at the ratio between the total length covered by the stroke and the
 * distance between the first and last point from this stroke.
 */
class EndPointRatioClassifier extends StrokeClassifier {
  public EndPointRatioClassifier(ClassifierData classifierData) {
    this.classifierData = classifierData;
  }

  @Override
  public String getTag() {
    return "END_RTIO";
  }

  @Override
  public float getFalseTouchEvaluation(Stroke stroke) {
    float ratio;
    if (stroke.getTotalLength() == 0.0f) {
      ratio = 1.0f;
    } else {
      ratio = stroke.getEndPointLength() / stroke.getTotalLength();
    }
    return EndPointRatioEvaluator.evaluate(ratio);
  }
}