| /* |
| * 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 hivemall.fm; |
| |
| import it.unimi.dsi.fastutil.objects.Object2ObjectMap; |
| import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap; |
| |
| import javax.annotation.Nonnull; |
| |
| public final class FMStringFeatureMapModel extends FactorizationMachineModel { |
| private static final int DEFAULT_MAPSIZE = 4096; |
| |
| // LEARNING PARAMS |
| private float _w0; |
| @Nonnull |
| private final Object2ObjectMap<String, Entry> _map; |
| |
| public FMStringFeatureMapModel(@Nonnull FMHyperParameters params) { |
| super(params); |
| this._w0 = 0.f; |
| this._map = new Object2ObjectOpenHashMap<String, FMStringFeatureMapModel.Entry>( |
| DEFAULT_MAPSIZE); |
| } |
| |
| @Override |
| public int getSize() { |
| return _map.size(); |
| } |
| |
| @Nonnull |
| Object2ObjectMap<String, Entry> getMap() { |
| return _map; |
| } |
| |
| @Override |
| public float getW0() { |
| return _w0; |
| } |
| |
| @Override |
| protected void setW0(float nextW0) { |
| this._w0 = nextW0; |
| } |
| |
| @Override |
| public float getW(@Nonnull Feature x) { |
| String j = x.getFeature(); |
| assert (j != null); |
| |
| Entry entry = _map.get(j); |
| if (entry == null) { |
| return 0.f; |
| } |
| return entry.W; |
| } |
| |
| @Override |
| protected void setW(@Nonnull Feature x, float nextWi) { |
| String j = x.getFeature(); |
| assert (j != null); |
| |
| Entry entry = _map.get(j); |
| if (entry == null) { |
| float[] Vf = initV(); |
| entry = new Entry(nextWi, Vf); |
| _map.put(j, entry); |
| } else { |
| entry.W = nextWi; |
| } |
| } |
| |
| @Override |
| public float getV(@Nonnull Feature x, int f) { |
| String j = x.getFeature(); |
| assert (j != null); |
| |
| final float[] V; |
| Entry entry = _map.get(j); |
| if (entry == null) { |
| V = initV(); |
| entry = new Entry(0.f, V); |
| _map.put(j, entry); |
| } else { |
| V = entry.Vf; |
| assert (V != null); |
| } |
| return V[f]; |
| } |
| |
| @Override |
| protected void setV(@Nonnull Feature x, int f, float nextVif) { |
| String j = x.getFeature(); |
| assert (j != null); |
| |
| final float[] V; |
| Entry entry = _map.get(j); |
| if (entry == null) { |
| V = initV(); |
| entry = new Entry(0.f, V); |
| _map.put(j, entry); |
| } else { |
| V = entry.Vf; |
| assert (V != null); |
| } |
| V[f] = nextVif; |
| } |
| |
| static final class Entry { |
| |
| float W; |
| @Nonnull |
| final float[] Vf; |
| |
| Entry(float W, @Nonnull float[] Vf) { |
| this.W = W; |
| this.Vf = Vf; |
| } |
| |
| } |
| |
| } |