uk.ac.ebi.intenz.webapp.controller
Class SearchCommand

java.lang.Object
  uk.ac.ebi.intenz.webapp.controller.Command
      uk.ac.ebi.intenz.webapp.controller.DatabaseCommand
          uk.ac.ebi.intenz.webapp.controller.SearchCommand

public class SearchCommand
extends DatabaseCommand

This class processes all full text queries.

All queries are processed using the UTF-8 encoded (octet sequences) representation sent by browsers. Rather than using request.getParameter(...) this class decodes the query string manually, since request.getParameter(...) does not decode the octet sequences correctly, if special characters encoded as two or more octets are transmitted.
See the XChars library documentation for more information regarding UTF-8 octet sequence decoding.

TODO: Implement a query parser.

Version:

2.0 - 13-July-2004

Author:

Michael Darsow

Nested Class Summary

class

SearchCommand.Result

Field Summary

static org.apache.log4j.Logger

LOGGER

Fields inherited from class uk.ac.ebi.intenz.webapp.controller.DatabaseCommand

con, context, databaseErrorMessage, enzymeEntryMapper, request, response

Constructor Summary

SearchCommand()

Method Summary

void	process() Processes the full text query.
String	transformQuery(String query, uk.ac.ebi.intenz.webapp.controller.SearchCommand.QueryType queryType, boolean exclusion)

Methods inherited from class uk.ac.ebi.intenz.webapp.controller.DatabaseCommand

close, closeConnection, finalize, forward, init

Methods inherited from class java.lang.Object

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

Field Detail

LOGGER

public static final org.apache.log4j.Logger LOGGER

Constructor Detail

SearchCommand

public SearchCommand()

Method Detail

process

public void process()
             throws javax.servlet.ServletException,
                    IOException

Processes the full text query.

The query string is parsed, decoded, checked and integrated into a SQL statement. After execution the result is being sent to the browser (if any). Exceptions regarding this process are caught and the user is informed accordingly.

Specified by:

process in class Command

Throws:

javax.servlet.ServletException - ...

IOException - ...

transformQuery

public String transformQuery(String query,
                             uk.ac.ebi.intenz.webapp.controller.SearchCommand.QueryType queryType,
                             boolean exclusion)
                      throws QueryException

Throws:

QueryException