com.ikanow.infinit.e.data_model.index.IndexManager.java Source code

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Here is the source code for com.ikanow.infinit.e.data_model.index.IndexManager.java

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/*******************************************************************************
 * Copyright 2012 The Infinit.e 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.ikanow.infinit.e.data_model.index;

import java.util.Collection;

import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.reflect.TypeToken;
import com.ikanow.infinit.e.data_model.index.BasePojoIndexMap;

public class IndexManager extends ElasticSearchManager {

    //____________________________________________________________________________________

    // Index abstraction layer

    // Replaces ElasticSeachManager

    protected IndexManager() {
    }

    //________________________________________________________________________________________________

    // Format conversion

    // For non-BaseIndexPojo types (eg BaseDbTypes)
    // Must include a map (but it can be null):

    public static <S> JsonElement mapToIndex(S s, BasePojoIndexMap<S> docMap) {
        GsonBuilder gb = BaseIndexPojo.getDefaultBuilder();
        if (null != docMap) {
            gb = docMap.extendBuilder(gb);
        }
        return gb.create().toJsonTree(s);
    }

    public static <S> S mapFromIndex(String s, Class<S> type, BasePojoIndexMap<S> docMap) {
        GsonBuilder gb = BaseIndexPojo.getDefaultBuilder();
        if (null != docMap) {
            gb = docMap.extendBuilder(gb);
        }
        return gb.create().fromJson(s, type);
    }

    @SuppressWarnings("unchecked")
    public static <S> S mapFromIndex(String s, TypeToken<S> type, BasePojoIndexMap<S> docMap) {
        GsonBuilder gb = BaseIndexPojo.getDefaultBuilder();
        if (null != docMap) {
            gb = docMap.extendBuilder(gb);
        }
        return (S) gb.create().fromJson(s, type.getType());
    }

    public static <S> JsonElement mapListToIndex(Collection<S> list, TypeToken<? extends Collection<S>> listType,
            BasePojoIndexMap<S> docMap) {
        GsonBuilder gb = BaseIndexPojo.getDefaultBuilder();
        if (null != docMap) {
            gb = docMap.extendBuilder(gb);
        }
        return gb.create().toJsonTree(list, listType.getType());
    }

    @SuppressWarnings("unchecked")
    public static <S, L extends Collection<S>> L mapListFromIndex(String json, TypeToken<? extends L> listType,
            BasePojoIndexMap<S> docMap) {
        GsonBuilder gb = BaseIndexPojo.getDefaultBuilder();
        if (null != docMap) {
            gb = docMap.extendBuilder(gb);
        }
        return (L) gb.create().fromJson(json, listType.getType());
    }
}