/**
 *
 * The MIT License
 *
 * Copyright (c) 2011 the original author or authors.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.googlecode.charts4j.parameters;

/**
 * <b>For Charts4J internal use only.</b> All implementors of this interface
 * are responsible for creating one Google Chart API URL parameter string.
 *
 * @author Julien Chastang (julien.c.chastang at gmail dot com)
 */
interface Parameter {

    /**
     * Get the Google Chart API URL parameter key.
     * 
     * @return the string
     */
    String getKey();

    /**
     * Get the Google Chart API URL parameter value.
     * 
     * @return the string
     */
    String getValue();

    /**
     * Creates the Google Chart API URL parameter string.
     *
     * @return the string
     */
    String toURLParameterString();
}