src/com/android/settings/search/DatabaseIndexingUtils.java

/*
 * Copyright (C) 2017 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 com.android.settings.search;

import android.util.Log;

import java.lang.reflect.Field;

/**
 * Utility class for {@like DatabaseIndexingManager} to handle the mapping between Payloads
 * and Preference controllers, and managing indexable classes.
 */
public class DatabaseIndexingUtils {

    private static final String TAG = "IndexingUtil";

    public static final String FIELD_NAME_SEARCH_INDEX_DATA_PROVIDER =
            "SEARCH_INDEX_DATA_PROVIDER";

    public static Indexable.SearchIndexProvider getSearchIndexProvider(final Class<?> clazz) {
        try {
            final Field f = clazz.getField(FIELD_NAME_SEARCH_INDEX_DATA_PROVIDER);
            return (Indexable.SearchIndexProvider) f.get(null);
        } catch (NoSuchFieldException e) {
            Log.d(TAG, "Cannot find field '" + FIELD_NAME_SEARCH_INDEX_DATA_PROVIDER + "'");
        } catch (SecurityException se) {
            Log.d(TAG, "Security exception for field '" +
                    FIELD_NAME_SEARCH_INDEX_DATA_PROVIDER + "'");
        } catch (IllegalAccessException e) {
            Log.d(TAG, "Illegal access to field '" + FIELD_NAME_SEARCH_INDEX_DATA_PROVIDER + "'");
        } catch (IllegalArgumentException e) {
            Log.d(TAG, "Illegal argument when accessing field '" +
                    FIELD_NAME_SEARCH_INDEX_DATA_PROVIDER + "'");
        }
        return null;
    }
}