JDBCQueryCommand (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 JDBCQueryCommand

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

Direct Known Subclasses:: JDBCBeanExistsCommand, JDBCFinderCommand, JDBCLoadEntityCommand

public abstract class JDBCQueryCommand
extends JDBCCommand

Abstract superclass for all JAWS Commands that issue JDBC queries directly. Provides a Template Method implementation for executeStatementAndHandleResult.

Version:: $Revision: 1.8 $
Author:: Justin Forder

Field Summary

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

factory, jawsEntity, name

Constructor Summary

protected JDBCQueryCommand(JDBCCommandFactory factory, String name)
          Pass the arguments on to the superclass constructor.

Method Summary

protected Object executeStatementAndHandleResult(PreparedStatement stmt, Object argOrArgs)
          Template Method that executes the PreparedStatement and calls handleResult on the resulting ResultSet.

protected abstract 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.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

Constructor Detail

JDBCQueryCommand

protected JDBCQueryCommand(JDBCCommandFactory factory,
                           String name)

Pass the arguments on to the superclass constructor.

Method Detail

executeStatementAndHandleResult

protected Object executeStatementAndHandleResult(PreparedStatement stmt,
                                                 Object argOrArgs)
                                          throws Exception

Template Method that executes the PreparedStatement and calls handleResult on the resulting ResultSet.

Specified by:: executeStatementAndHandleResult in class JDBCCommand

Parameters:: stmt - the prepared statement, with its parameters already set.; 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.

handleResult

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

Handles the result of successful execution of the query.

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.