jcckit.util.ConfigData Maven / Gradle / Ivy
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package jcckit.util;
/**
* Interface for hierarchically managed key-value pairs. The key is
* always a string which contains any kind of printable character except
* '/', '=', ':', and whitespace characters like ' ' and '\\t'.
* The value is either a string or a ConfigData object.
*
* This interface will be used by {@link ConfigParameters} in accordance
* with the Strategy design pattern.
*
* @author Franz-Josef Elmer
*/
public interface ConfigData {
/**
* Returns the full key.
* @param key A (relative) key. null is not allowed.
* @return the full key including path.
*/
public String getFullKey(String key);
/**
* Returns the value associated with this key.
* @param key The relative key. null is not allowed.
* @return the associated value. Will be null if no value exists
* for key.
*/
public String get(String key);
/**
* Returns the ConfigData object associated with this key.
* @param key The relative key. null is not allowed.
* @return the associated value. Will never return null.
* Instead an empty ConfigData is returned.
*/
public ConfigData getNode(String key);
}