net.spy.db
Class DefaultQuerySelector

java.lang.Object
  net.spy.db.DefaultQuerySelector

All Implemented Interfaces:

QuerySelector

public class DefaultQuerySelector

extends Object

implements QuerySelector

Default implementation of query selector. This implementation of QuerySelector works by finding the best match for the given Connection by package name. If given a SpyConfig, it looks for either an entry called queryName or a prefix match against the driver name as specified for SpyDB.

The following driver prefixes are mapped to their respective names in this implementation:

Driver class prefix	Query Name	Driver Provider
org.postgresql.	pgsql	http://www.postgresql.org
oracle.jdbc.driver.	oracle	http://www.oracle.com
weblogic.jdbc.oci.	oracle	http://www.bea.com
com.ashna.jturbo.	mssql	http://www.newatlanta.com/

See Also:

SpyDB

Field Summary

Fields inherited from interface net.spy.db.QuerySelector

DEFAULT_QUERY

Constructor Summary

DefaultQuerySelector()
Get an instance of DefaultQuerySelector.

Method Summary

String	getQuery(Connection conn, Map queryMap) Get the query for the given connection.
String	getQuery(SpyConfig conf, Map queryMap) Get the query for the given config.
protected String	getQuery(String name, Map queryMap) Attempt to get a query in the given map by a name.
protected void	initNameMap() Initialize the prefix to name map.
protected void	registerNameMapping(String prefix, String name) Register a prefix -> name mapping.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultQuerySelector

public DefaultQuerySelector()

Get an instance of DefaultQuerySelector. This should really only be called from QuerySelectorFactory

Method Detail

initNameMap

protected void initNameMap()

Initialize the prefix to name map.

registerNameMapping

protected void registerNameMapping(String prefix,
                                   String name)

Register a prefix -> name mapping.

Parameters:

prefix - the prefix to match for a name

name - the name

getQuery

public String getQuery(Connection conn,
                       Map queryMap)

Description copied from interface: QuerySelector

Get the query for the given connection.

Specified by:

getQuery in interface QuerySelector

Parameters:

conn - the connection that wants the query

queryMap - the Map of queries by name

Returns:

the query (as a String), null if a suitable query can't be found

See Also:

QuerySelector

getQuery

public String getQuery(SpyConfig conf,
                       Map queryMap)

Description copied from interface: QuerySelector

Get the query for the given config.

Specified by:

getQuery in interface QuerySelector

Parameters:

conf - a SpyConfig containing enough information to find a query

queryMap - the Map of queries by name

Returns:

the query (as a String), null if a suitable query can't be found

See Also:

QuerySelector

getQuery

protected String getQuery(String name,
                          Map queryMap)

Attempt to get a query in the given map by a name.

Parameters:

name - the name against which to search

queryMap - the map containing the queries

Returns:

the query, or null if one cannot be found