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/*
* Copyright (C) 2012 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.services;
import android.os.IBinder;
import android.util.Log;
import android.util.Pair;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import java.util.List;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import java.util.Iterator;
class FeatureAssembly {
private static final String TAG = "FeatureAssembly";
private List<String> mPossibleFeatures;
private HashSet<String> mUseFeatures;
private HashSet<Pair<String, String> > mUsePairedFeatures;
private AggregatorManager mAggregatorManager;
public FeatureAssembly() {
mAggregatorManager = AggregatorManager.getInstance();
mPossibleFeatures = Arrays.asList(mAggregatorManager.getListOfFeatures());
mUseFeatures = new HashSet<String>();
mUsePairedFeatures = new HashSet<Pair<String, String> >();
}
public boolean registerFeature(String s) {
if (mPossibleFeatures.contains(s)) {
mUseFeatures.add(s);
return true;
} else {
return false;
}
}
public boolean registerFeaturePair(String[] features) {
if (features.length != 2 ||
!mPossibleFeatures.contains(features[0]) ||
!mPossibleFeatures.contains(features[1])) {
return false;
} else {
mUseFeatures.add(features[0]);
mUseFeatures.add(features[1]);
mUsePairedFeatures.add(Pair.create(features[0], features[1]));
return true;
}
}
public Set<String> getUsedFeatures() {
return (Set) mUseFeatures;
}
public Map<String, String> getFeatureMap() {
HashMap<String, String> featureMap = new HashMap<String, String>();
Iterator itr = mUseFeatures.iterator();
while(itr.hasNext()) {
String f = (String) itr.next();
Map<String, String> features = mAggregatorManager.getDataMap(f);
// TODO: sanity check for now.
if (features.size() > 1) {
throw new RuntimeException("Incorrect feature format extracted from aggregator.");
}
featureMap.putAll(features);
}
if (!mUsePairedFeatures.isEmpty()) {
itr = mUsePairedFeatures.iterator();
while(itr.hasNext()) {
Pair<String, String> pair = (Pair<String, String>) itr.next();
if (featureMap.containsKey(pair.first) &&
featureMap.containsKey(pair.second)) {
String key = pair.first + Predictor.FEATURE_SEPARATOR + pair.second;
String value = featureMap.get(pair.first) + Predictor.FEATURE_SEPARATOR +
featureMap.get(pair.second);
featureMap.put(key, value);
}
}
}
return (Map)featureMap;
}
public String augmentFeatureInputString(String s) {
String fs = s;
Iterator itr = mUseFeatures.iterator();
while(itr.hasNext()) {
String f = (String) itr.next();
fs = fs + "+" + mAggregatorManager.getDataMap(f).get(f);
}
return fs;
}
}
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