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package org.apache.juneau.config.encode;

import org.apache.juneau.config.*;

/**
 * API for defining a string encoding/decoding mechanism for entries in {@link Config}.
 *
 * <ul class='seealso'>
 * 	<li class='link'>{@doc juneau-config.EncodedEntries}
 * </ul>
 */
public interface ConfigEncoder {

	/**
	 * Encode a string.
	 *
	 * @param fieldName The field name being encoded.
	 * @param in The unencoded input string.
	 * @return The encoded output string.
	 */
	public String encode(String fieldName, String in);

	/**
	 * Decode a string.
	 *
	 * @param fieldName The field name being decoded.
	 * @param in The encoded input string.
	 * @return The decoded output string.
	 */
	public String decode(String fieldName, String in);

	/**
	 * Returns <jk>true</jk> if the specified string is encoded.
	 *
	 * @param in The input string.
	 * @return
	 * 	<jk>true</jk> if the specified string is encoded.
	 * 	<br>Returns <jk>false</jk> if the string is <jk>null</jk>.
	 */
	public boolean isEncoded(String in);
}
