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SiteWhere MongoDB Integration

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/*
 * Copyright (c) SiteWhere, LLC. All rights reserved. http://www.sitewhere.com
 *
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package com.sitewhere.mongodb.common;

import org.bson.Document;

import com.sitewhere.spi.common.IMetadataProvider;

/**
 * Used to load or save device entity metdata to MongoDB.
 */
public class MongoMetadataProvider {

    /** Property for entity metadata */
    public static final String PROP_METADATA = "meta";

    /**
     * Store data into a {@link Document} using default property name.
     * 
     * @param source
     * @param target
     */
    public static void toDocument(IMetadataProvider source, Document target) {
	MongoMetadataProvider.toDocument(PROP_METADATA, source, target);
    }

    /**
     * Store data into a {@link Document}.
     * 
     * @param propertyName
     * @param source
     * @param target
     */
    public static void toDocument(String propertyName, IMetadataProvider source, Document target) {
	Document metadata = new Document();
	for (String key : source.getMetadata().keySet()) {
	    metadata.put(key, source.getMetadata().get(key));
	}
	target.put(propertyName, metadata);
    }

    /**
     * Load data from a DBObject using default property name.
     * 
     * @param source
     * @param target
     */
    public static void fromDocument(Document source, IMetadataProvider target) {
	MongoMetadataProvider.fromDocument(PROP_METADATA, source, target);
    }

    /**
     * Load data from a DBObject.
     * 
     * @param propertyName
     * @param source
     * @param target
     */
    public static void fromDocument(String propertyName, Document source, IMetadataProvider target) {
	Document metadata = (Document) source.get(propertyName);
	if (metadata != null) {
	    for (String key : metadata.keySet()) {
		target.getMetadata().put(key, (String) metadata.get(key));
	    }
	}
    }
}