Write forgetting curve flag.

import java.util.HashMap;

import java.util.Map.Entry;

import java.util.TreeMap;

import java.util.concurrent.TimeUnit;

/**

 * Reads and writes Binary files for a UserHistoryDictionary.

public final class UserHistoryDictIOUtils {

    private static final String TAG = UserHistoryDictIOUtils.class.getSimpleName();

    private static final boolean DEBUG = false;

    private static final String USES_FORGETTING_CURVE_KEY = "USES_FORGETTING_CURVE";

    private static final String USES_FORGETTING_CURVE_VALUE = "1";

    private static final String LAST_UPDATED_TIME_KEY = "date";

    public interface OnAddWordListener {

        public void setUnigram(final String word, final String shortcutTarget, final int frequency);

            final BigramDictionaryInterface dict, final UserHistoryDictionaryBigramList bigrams,

            final FormatOptions formatOptions) {

        final FusionDictionary fusionDict = constructFusionDictionary(dict, bigrams);

        fusionDict.addOptionAttribute(USES_FORGETTING_CURVE_KEY, USES_FORGETTING_CURVE_VALUE);

        fusionDict.addOptionAttribute(LAST_UPDATED_TIME_KEY,

                String.valueOf(TimeUnit.MILLISECONDS.toSeconds(System.currentTimeMillis())));

        try {

            dictEncoder.writeDictionary(fusionDict, formatOptions);

            Log.d(TAG, "end writing");