package de.frankfiedler.cms.client.transformer;

/**
 * This interface defines two methods for html-ascii conversion.
 * 
 * @see de.frankfiedler.cms.client.transformer.DefaultTransformer
 */
public interface Transformer {
	
	/**
	 * A transformer to do NO transformations.
	 */
	public static final Transformer NO=new NoTransform();
	/**
	 * Gets an Ascii string from an html string.
	 * 
	 * @param html
	 *            the HTML string to be converted
	 * @return an ascii string
	 */
	public String getAsciiFromHtml(String html);

	/**
	 * Gets a Html string from a Ascii string.
	 * 
	 * @param ascii
	 *            the ascii
	 * @return the ascii
	 */
	public String getHtmlFromAscii(String ascii);
}