org.apache.drill.exec.store.mongo.MongoUtils.java Source code

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Here is the source code for org.apache.drill.exec.store.mongo.MongoUtils.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.drill.exec.store.mongo;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.mongodb.BasicDBObject;

public class MongoUtils {

    public static BasicDBObject andFilterAtIndex(BasicDBObject leftFilter, BasicDBObject rightFilter) {
        BasicDBObject andQueryFilter = new BasicDBObject();
        List<BasicDBObject> filters = new ArrayList<BasicDBObject>();
        filters.add(leftFilter);
        filters.add(rightFilter);
        andQueryFilter.put("$and", filters);
        return andQueryFilter;
    }

    public static BasicDBObject orFilterAtIndex(BasicDBObject leftFilter, BasicDBObject rightFilter) {
        BasicDBObject orQueryFilter = new BasicDBObject();
        List<BasicDBObject> filters = new ArrayList<BasicDBObject>();
        filters.add(leftFilter);
        filters.add(rightFilter);
        orQueryFilter.put("$or", filters);
        return orQueryFilter;
    }

    public static Map<String, List<BasicDBObject>> mergeFilters(Map<String, Object> minFilters,
            Map<String, Object> maxFilters) {
        Map<String, List<BasicDBObject>> filters = Maps.newHashMap();

        for (Entry<String, Object> entry : minFilters.entrySet()) {
            List<BasicDBObject> list = filters.get(entry.getKey());
            if (list == null) {
                list = Lists.newArrayList();
                filters.put(entry.getKey(), list);
            }
            list.add(new BasicDBObject(entry.getKey(), new BasicDBObject("$gte", entry.getValue())));
        }

        for (Entry<String, Object> entry : maxFilters.entrySet()) {
            List<BasicDBObject> list = filters.get(entry.getKey());
            if (list == null) {
                list = Lists.newArrayList();
                filters.put(entry.getKey(), list);
            }
            list.add(new BasicDBObject(entry.getKey(), new BasicDBObject("$lt", entry.getValue())));
        }
        return filters;
    }

}