org.eclipse.smila.jdbc

Class JdbcSelectPipelet

java.lang.Object

org.eclipse.smila.jdbc.AbstractJdbcPipelet

org.eclipse.smila.jdbc.JdbcSelectPipelet

All Implemented Interfaces:

Pipelet

public class JdbcSelectPipelet
extends AbstractJdbcPipelet

Pipelet that selects data from a database via JDBC, using a statement which is parameterized by record values. Resulting rows selected from the database can be returned in a new 'records' section of the input record (result: single; default), or as multiple records as returned by the database (result: multi). The values for the PreparedStatement are selected from the input record by following the configured value paths. If a value path references a single value, this is used. If it references a sequence of values, the first value is used. In any other case, the value is set 'null'.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	JdbcSelectPipelet.ResultMode

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	RESULT_KEY
static java.lang.String	RESULT_PARAM

Fields inherited from class org.eclipse.smila.jdbc.AbstractJdbcPipelet

_configuration, PARAM_DB_PROPS, PARAM_DB_URL, PARAM_STMT, PARAM_VALUE_PATHS, VALUE_PATH_SEPARATOR

Constructor Summary

Constructors

Constructor and Description
JdbcSelectPipelet()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String[]	process(Blackboard blackboard, java.lang.String[] recordIds) process given records.

Methods inherited from class org.eclipse.smila.jdbc.AbstractJdbcPipelet

configure, getDbProps, getDbUrl, getStatement, getStatementValues

Methods inherited from class java.lang.Object

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

Field Detail

RESULT_KEY

public static final java.lang.String RESULT_KEY

See Also:

Constant Field Values

RESULT_PARAM

public static final java.lang.String RESULT_PARAM

See Also:

Constant Field Values

Constructor Detail

JdbcSelectPipelet

public JdbcSelectPipelet()

Method Detail

process

public java.lang.String[] process(Blackboard blackboard,
                         java.lang.String[] recordIds)
                           throws ProcessingException

Description copied from interface: Pipelet

process given records.

Parameters:

blackboard - Blackboard holding and managing the records.

recordIds - Ids of records to process.

Returns:

Ids of records to be passed into the next pipelet. By default this should be the same as the passed in recordIds unless there is a specific (businesslogic) reason not to do so.

Throws:

ProcessingException - error during processing.