package com.ctrip.framework.apollo;
import com.ctrip.framework.apollo.core.enums.ConfigFileFormat;
/**
* @author Jason Song(song_s@ctrip.com)
*/
public interface ConfigFile {
/**
* Get file content of the namespace
* @return file content, {@code null} if there is no content
*/
String getContent();
/**
* Whether the config file has any content
* @return true if it has content, false otherwise.
*/
boolean hasContent();
/**
* Get the namespace of this config file instance
* @return the namespace
*/
String getNamespace();
/**
* Get the file format of this config file instance
* @return the config file format enum
*/
ConfigFileFormat getConfigFileFormat();
/**
* Add change listener to this config file instance.
*
* @param listener the config file change listener
*/
void addChangeListener(ConfigFileChangeListener listener);
}