Changes between Initial Version and Version 1 of ApertureSimpleDataCrawler

Timestamp:

10/14/05 11:35:23 (19 years ago)

Author:

sauermann

Comment:

--

ApertureSimpleDataCrawler

@@ +1 @@
+The ApertureSimpleDataCrawler is responsible for a simple access to structured data sources.
+
+Instances of this interface would be classes like FileDataSource, IMAPDataSource, OutlookDataSource
+
+
+{{{
+
+public interface SimpleDataCrawler {
+
+
+ /**
+  * init the datasource passing variables like name, base path, passwords, server hostname, etc
+  */
+ public void init(Map parameters);
+
+ /**
+  * open the passed data object so that it can be viewed / edited by the user. for a file,
+  * this would mean that the operating system opens the file, for an address book entry
+  * the address book application would have to start
+  */
+ public void openObject(String uri);
+
+ /**
+  * get the root uri of this datasource
+  */
+ public String getRootUri();
+
+ /**
+  * get the detailed data of one object, including plaintext and metadata 
+  * this is costly.
+  * This may (internally) make heavy reuse of Extractors
+  */
+ public Map getDataOfObject(String uri);
+
+ /**
+  * List sub-folders, Iterator contains folder uris as Strings.
+  * this may also return the uris of objects, if the objects can contain sub-objects. 
+  * (IMAP-attachments)-but this is bad as detection of sub-objects of emails is costly.
+  * the first call of this method would be with the getRootUri()
+  */
+ public Iterator listSubFolders(String uri);
+
+ /**
+  * List objects inside the passed folder, Iterator contains folder uris of objects as Strings.
+  * the first call of this method would be with the getRootUri()
+  */
+ public Iterator listSubObjects(String uri);
+
+ /**
+  * get a map of metadata about the passed object, 
+  * enough so that changes can be detected.
+  * if one value in this map has changed compared to the previously returned map (in the last scan)
+  * than getDataOfObject is called to get the current data.
+  */
+ public Map getChangeDataOfObject(String uri);
+
+}
+
+}}}