Application: gvSIG desktop

        /**

         * Return true if has set attribute names

         * 

         * @return true if has attribute names, otherwise false

         */

        boolean hasAttributeNames();

        /**

         * Remove all the attribute names specifieds.

         */

        void clearAttributeNames();

        /**

	 * Returns the names of the attributes that are constants in each {@link Feature}.

	 * These attributes will not be charged.

         * 

	 * @return the attribute names that are constant

	 */

	String[] getConstantsAttributeNames();

	 * Set of attribute names to be treated as constants for each {@link Feature}.

	 * 

	 * @param attributeNames

	 *            the attribute names to be constants

	 */

	void setConstantsAttributeNames(String[] attributeNames);

	/**

	 * Add an attribute name that will be treated as constant for each 

	 * {@link Feature}.

	 * 

	 * @param attributeName

	 *             the attribute name to be treated as constant

	 */

	void addConstantAttributeName(String attributeName);

        /**

         * Return true if has set constants attribute names

         * 

         * @return true if has constants attribute names, otherwise false

         */

        boolean hasConstantsAttributeNames();

        /**

         * Remove all the names specified as constants attributes.

         */

        void clearConstantsAttributeNames();

	/**