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	 * Hashtable of Feature Definition ID to list of learned Bullet objects
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	 * Hashtable of Feature Definition ID to list of learned Bullet objects
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	 */
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	 */
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	private Map<Long, List<ExpandedBullet>> learnedBullets;
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	private Map<Long, List<ExpandedBullet>> learnedBullets;
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	/**
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	/**
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	 * Hashtable of Facet Definition ID to list of unique facet values found
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	 * across entities
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	 */
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	private Map<Long, List<String>> facetDefinitionIDFacetValues;
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	/**
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	 * Instantiates required data structures only when needed
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	 * Instantiates required data structures only when needed
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	 */
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	 */
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	public EntityContainer() {
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	public EntityContainer() {
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		// Lazy initialization
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		// Lazy initialization
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	}
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	}
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		ExpandedEntity expEntity = new ExpandedEntity(entity);
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		ExpandedEntity expEntity = new ExpandedEntity(entity);
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		return expEntity;
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		return expEntity;
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	}
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	}
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	/**
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	 * Returns hashtable of list facet values to facet definition ID
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	 *
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	 * @return
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	 * @throws Exception
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	 */
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	@SuppressWarnings("unchecked")
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	public Map<Long, List<String>> getFacetValues() throws Exception {
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		// De-serialize
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		if(this.facetDefinitionIDFacetValues == null) {
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			String dbFile = Utils.ENTITIES_DB_PATH + "facetvalues.ser";
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			this.facetDefinitionIDFacetValues =
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				(Map<Long, List<String>>) DBUtils.read(dbFile);
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		}
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		if(this.facetDefinitionIDFacetValues == null) {
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			this.facetDefinitionIDFacetValues = new HashMap<Long,
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				List<String>>();
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		}
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		return this.facetDefinitionIDFacetValues;
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	}
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	/**
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	 * Returns list of facet values for a facet definition ID
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	 *
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	 * @param facetDefinitionID
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	 * @return List<String>
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	 * @throws Exception
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	 */
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	public List<String> getFacetValues(long facetDefinitionID)
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		throws Exception {
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		this.getFacetValues();
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		return this.facetDefinitionIDFacetValues.get(
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				new Long(facetDefinitionID));
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	}
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	/**
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	/**
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	 * Utility method to find out Feature object in Entity instance
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	 * Utility method to find out Feature object in Entity instance
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	 *
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	 *
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	 * @param entityID
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	 * @param entityID