SimpleSearch

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org.mydm.search
Class SimpleSearch

java.lang.Object
  org.mydm.search.SimpleSearch

All Implemented Interfaces:: java.lang.Runnable, Search

public class SimpleSearch
extends java.lang.Object
implements Search, java.lang.Runnable

Simple Search.

Simple Search will search all the metadata elements of all EDocuments of all collections.

Simple Search will also provide the case insensitive search over the metadata. Currently the search uses the XPATH as a query service to the database (XML Database).

The XPATH engine is case sensitive, that means if we are looking for a word "Chemistry" then it will only give the results where it find the word "Chemistry" with capital letter "C". This is not acceptable to a typical search enigne.

The workaround is to capture all the metadata of EDocument and save them as lower case text. So when the search is performed the search string (query string) is converted in to lower case and searched on the lower case complete metadata text.

Database The main collections are container in "md" (/db/md)

The database contains collection named "mdftext" which contains documents (single document per a collection from "md").

Simple Search will search all the documents in this "mdftext" collection.

Advantages of this workaround are

Case insensitive search
Performance is also good
Cross Collection Search is possible

Note: currently we use only XPATH 1.0 (XPATH 2.0 and XQuery are not yet supported)

Usage:


 	String searchterm = "chemical physics";

 	SimpleSearch ss = new SimpleSearch(searchterm);

 	SearchResListenerImpl sreslistner = new SearchResListener();

 	ss.performSearch(srlistener);

Until we say ss.performSearch() the search won't be started. performSearch() will run as a thread. The results found will be notified to the SearchResListener Object (sreslistener).

Constructor Summary
`SimpleSearch()` Constructor
`SimpleSearch(java.lang.String searchstring)` Constructor

Method Summary
`void`	`addListener(SearchResListener srl)` Adds the Listener to the set of listeners
`SearchResListener`	`performSearch()` Performs the search and returns a reference to SearchResListener object.
`void`	`performSearch(SearchResListener slistener)` Performs the search in a new thread.
`void`	`removeListener(SearchResListener srl)` Removed the listener from the set of listeners.
`void`	`run()`
`boolean`	`status()` Gives the status of the search.
`void`	`stop()` Stops the Searching thread.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SimpleSearch

public SimpleSearch()

Constructor

SimpleSearch

public SimpleSearch(java.lang.String searchstring)

Constructor
Parameters:: searchstring - search string.

Method Detail