Clean up UserDictionaryCompatUtils

package com.android.inputmethod.compat;

import android.annotation.TargetApi;

import android.content.Context;

import android.provider.UserDictionary.Words;

import android.os.Build;

import android.provider.UserDictionary;

import java.lang.reflect.Method;

import java.util.Locale;

public final class UserDictionaryCompatUtils {

    // UserDictionary.Words#addWord(Context, String, int, String, Locale) was introduced

    // in API level 16 (Build.VERSION_CODES.JELLY_BEAN).

    private static final Method METHOD_addWord = CompatUtils.getMethod(Words.class, "addWord",

            Context.class, String.class, int.class, String.class, Locale.class);

    @SuppressWarnings("deprecation")

    public static void addWord(final Context context, final String word,

            final int freq, final String shortcut, final Locale locale) {

        if (hasNewerAddWord()) {

            CompatUtils.invoke(Words.class, null, METHOD_addWord, context, word, freq, shortcut,

                    locale);

        } else {

        if (BuildCompatUtils.EFFECTIVE_SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {

            addWordWithShortcut(context, word, freq, shortcut, locale);

            return;

        }

        // Fall back to the pre-JellyBean method.

            final int localeType;

            if (null == locale) {

                localeType = Words.LOCALE_TYPE_ALL;

            } else {

        final Locale currentLocale = context.getResources().getConfiguration().locale;

                if (locale.equals(currentLocale)) {

                    localeType = Words.LOCALE_TYPE_CURRENT;

                } else {

                    localeType = Words.LOCALE_TYPE_ALL;

                }

            }

            Words.addWord(context, word, freq, localeType);

        }

        final int localeType = currentLocale.equals(locale)

                ? UserDictionary.Words.LOCALE_TYPE_CURRENT : UserDictionary.Words.LOCALE_TYPE_ALL;

        UserDictionary.Words.addWord(context, word, freq, localeType);

    }

    public static final boolean hasNewerAddWord() {

        return null != METHOD_addWord;

    // {@link UserDictionary.Words#addWord(Context,String,int,String,Locale)} was introduced

    // in API level 16 (Build.VERSION_CODES.JELLY_BEAN).

    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)

    private static void addWordWithShortcut(final Context context, final String word,

            final int freq, final String shortcut, final Locale locale) {

        UserDictionary.Words.addWord(context, word, freq, shortcut, locale);

    }

}