net.hydromatic.optiq.impl.mongodb.MongoSchema.java Source code

Introduction

Here is the source code for net.hydromatic.optiq.impl.mongodb.MongoSchema.java

Source

/*
// Licensed to Julian Hyde under one or more contributor license
// agreements. See the NOTICE file distributed with this work for
// additional information regarding copyright ownership.
//
// Julian Hyde 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 net.hydromatic.optiq.impl.mongodb;

import net.hydromatic.optiq.*;
import net.hydromatic.optiq.impl.AbstractSchema;

import com.google.common.collect.ImmutableMap;

import com.mongodb.DB;
import com.mongodb.MongoClient;

import java.util.*;

/**
 * Schema mapped onto a directory of MONGO files. Each table in the schema
 * is a MONGO file in that directory.
 */
public class MongoSchema extends AbstractSchema {
    final DB mongoDb;

    /**
     * Creates a MongoDB schema.
     *
     * @param host Mongo host, e.g. "localhost"
     * @param database Mongo database name, e.g. "foodmart"
     */
    public MongoSchema(String host, String database) {
        super();
        try {
            MongoClient mongo = new MongoClient(host);
            this.mongoDb = mongo.getDB(database);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    protected Map<String, Table> getTableMap() {
        final ImmutableMap.Builder<String, Table> builder = ImmutableMap.builder();
        for (String collectionName : mongoDb.getCollectionNames()) {
            builder.put(collectionName, new MongoTable(collectionName));
        }
        return builder.build();
    }
}

// End MongoSchema.java