| /* |
| * Copyright (C) 2011 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 android.bordeaux.learning; |
| |
| /** |
| * Wrapper for multiclass passive aggressive classifier. |
| * version 1 supports indexed sparse feature only. |
| */ |
| public class MulticlassPA { |
| |
| public MulticlassPA(int numClasses, int numDimensions, float aggressiveness) { |
| nativeClassifier = initNativeClassifier(numClasses, numDimensions, |
| aggressiveness); |
| } |
| |
| /** |
| * Train on one example |
| */ |
| public boolean sparseTrainOneExample(int[] index_array, |
| float[] float_array, |
| int target) { |
| return nativeSparseTrainOneExample( |
| index_array, float_array, target, nativeClassifier); |
| } |
| |
| /** |
| * Train on one example |
| */ |
| public int sparseGetClass(int[] index_array, float[] float_array) { |
| return nativeSparseGetClass(index_array, float_array, nativeClassifier); |
| } |
| |
| static { |
| System.loadLibrary("bordeaux"); |
| } |
| |
| private int nativeClassifier; |
| |
| /* |
| * Initialize native classifier |
| */ |
| private native int initNativeClassifier(int num_classes, int num_dims, float aggressiveness); |
| |
| private native void deleteNativeClassifier(int classPtr); |
| |
| private native boolean nativeSparseTrainOneExample(int[] index_array, |
| float[] float_array, |
| int target, int classPtr); |
| |
| private native int nativeSparseGetClass(int[] index_array, |
| float[] float_array, |
| int classPtr); |
| } |