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JDBCFinderCommand (JBoss Server API) - JBoss 3.2.7 server API Documentation 英文版文档

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org.jboss.ejb.plugins.jaws.jdbc
Class JDBCFinderCommand

java.lang.Object
  org.jboss.ejb.plugins.jaws.jdbc.JDBCCommand
      org.jboss.ejb.plugins.jaws.jdbc.JDBCQueryCommand
          org.jboss.ejb.plugins.jaws.jdbc.JDBCFinderCommand

All Implemented Interfaces:

JPMFindEntitiesCommand

Direct Known Subclasses:

JDBCDefinedFinderCommand, JDBCFindAllCommand, JDBCFindByCommand, JDBCPreloadFinderCommand

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public abstract class JDBCFinderCommand

extends JDBCQueryCommand

implements JPMFindEntitiesCommand

Abstract superclass of finder commands that return collections. Provides the handleResult() implementation that these all need.

Version:

$Revision: 1.19.2.1 $

Revisions:

20010621 Bill Burke:

• added constructor to facilitate re-use. Removed extra login for setting up FinderResults since this class is really not used anymore.

20010812 vincent.harcq@hubmethods.com:

• Get Rid of debug flag, use log4j instead

20020525 Dain Sundstrom:

• Replaced FinderResults with collection

Author:

Rickard 脰berg, Marc Fleury, Joe Shevland, Justin Forder, Bill Burke

See Also:

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Field Summary
protected  FinderMetaData	finderMetaData

 

Fields inherited from class org.jboss.ejb.plugins.jaws.jdbc.JDBCCommand

factory, jawsEntity, name

 

Constructor Summary

JDBCFinderCommand(JDBCCommandFactory factory, FinderMetaData f)

JDBCFinderCommand(JDBCCommandFactory factory, String name)

 

Method Summary
Collection	execute(Method finderMethod, Object[] args, EntityEnterpriseContext ctx)
FinderMetaData	getFinderMetaData()
abstract  String	getFromClause()           This method must be ovverridden to return the full table list for the query, including any join statements.
abstract  String	getOrderByClause()           This method must be ovverridded to return the full order by clause for the query, including the 'ORDER BY' keyword.
abstract  String	getWhereClause()           This method must be overridden to return the where clause used in this query.
protected  Object	handleResult(ResultSet rs, Object argOrArgs)           Handles the result of successful execution of the query.

 

Methods inherited from class org.jboss.ejb.plugins.jaws.jdbc.JDBCQueryCommand

executeStatementAndHandleResult

 

Methods inherited from class org.jboss.ejb.plugins.jaws.jdbc.JDBCCommand

getCMPFieldValue, getConnection, getJawsCMPFieldJDBCType, getJDBCType, getJDBCTypeName, getName, getPkColumnList, getPkColumnWhereList, getPkFieldValue, getResultObject, getResultObject, getSQL, getState, isBinaryType, jdbcExecute, setCMPFieldValue, setParameter, setParameters, setPrimaryKeyParameters, setSQL

 

Methods inherited from class java.lang.Object

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

 

Field Detail

finderMetaData

protected FinderMetaData finderMetaData

Constructor Detail

JDBCFinderCommand

public JDBCFinderCommand(JDBCCommandFactory factory,
                         String name)

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JDBCFinderCommand

public JDBCFinderCommand(JDBCCommandFactory factory,
                         FinderMetaData f)

Method Detail

getFinderMetaData

public FinderMetaData getFinderMetaData()

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getWhereClause

public abstract String getWhereClause()

This method must be overridden to return the where clause used in this query. This must start with the keyword 'WHERE' and include all conditions needed to execute the query properly.

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getFromClause

public abstract String getFromClause()

This method must be ovverridden to return the full table list for the query, including any join statements. This must start with the keyword 'FROM' and include all tables needed to execute the query properly.

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getOrderByClause

public abstract String getOrderByClause()

This method must be ovverridded to return the full order by clause for the query, including the 'ORDER BY' keyword.

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execute

public Collection execute(Method finderMethod,
                          Object[] args,
                          EntityEnterpriseContext ctx)
                   throws javax.ejb.FinderException

Specified by:

execute in interface JPMFindEntitiesCommand

Throws:

javax.ejb.FinderException

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handleResult

protected Object handleResult(ResultSet rs,
                              Object argOrArgs)
                       throws Exception

Description copied from class: JDBCQueryCommand

Handles the result of successful execution of the query.

Specified by:

handleResult in class JDBCQueryCommand

Parameters:

rs - the result set from the query.

argOrArgs - argument or array of arguments passed in from subclass execute method.

Returns:

any result produced by the handling of the result of executing the prepared statement.

Throws:

Exception - if execution or result handling fails.

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