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org.apache.cocoon.components.modules.input
Class CollectionMetaModule

java.lang.Object
  org.apache.avalon.framework.logger.AbstractLogEnabled
      org.apache.cocoon.components.modules.input.AbstractInputModule
          org.apache.cocoon.components.modules.input.AbstractMetaModule
              org.apache.cocoon.components.modules.input.CollectionMetaModule

All Implemented Interfaces:

Disposable, Component, Composable, Configurable, LogEnabled, ThreadSafe, InputModule

public class CollectionMetaModule
extends AbstractMetaModule
implements ThreadSafe

Constructs an array of values suitable for a JDBC collection type from parameters obtained from another input module. Application is not limited to JDBC collections but can be used wherever similar named attributes shall be collected to an array of a given type. Currently, long, int, and string are known, more to come.

Global and local configuration

input-module

Name of the input module used to obtain the value and its configuration

member

Collection member

Attribute
name	Parameter name, "*" may distinguish multiple collections
type	JDBC type name of members

Version:

CVS $Id: CollectionMetaModule.html 1304258 2012-03-23 10:09:27Z ilgrosso $

Author:

Christian Haul

Field Summary

protected Configuration

memberConf

Fields inherited from class org.apache.cocoon.components.modules.input.AbstractMetaModule

defaultInput, initialized, input, INPUT_MODULE_SELECTOR, inputConf, inputSelector, manager

Fields inherited from class org.apache.cocoon.components.modules.input.AbstractInputModule

settings

Fields inherited from interface org.apache.cocoon.components.modules.input.InputModule

ROLE

Constructor Summary

CollectionMetaModule()

Method Summary

void	configure(Configuration config) Configures the database access helper.
Object	getAttribute(String name, Configuration modeConf, Map objectModel) Standard access to an attribute's value.
Iterator	getAttributeNames(Configuration modeConf, Map objectModel) Returns an Iterator of String objects containing the names of the attributes available.
Object[]	getAttributeValues(String name, Configuration modeConf, Map objectModel) Returns an array of String objects containing all of the values the given attribute has, or null if the attribute does not exist.

Methods inherited from class org.apache.cocoon.components.modules.input.AbstractMetaModule

compose, dispose, getNames, getNames, getValue, getValue, getValue, getValue, getValues, getValues, getValues, getValues, lazy_initialize, obtainModule, releaseModule

Methods inherited from class org.apache.avalon.framework.logger.AbstractLogEnabled

enableLogging, getLogger, setupLogger, setupLogger, setupLogger

Methods inherited from class java.lang.Object

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

Field Detail

memberConf

protected Configuration memberConf

Constructor Detail

CollectionMetaModule

public CollectionMetaModule()

Method Detail

configure

public void configure(Configuration config)
               throws ConfigurationException

Description copied from class: AbstractInputModule

Configures the database access helper. Takes all elements nested in component declaration and stores them as key-value pairs in settings. Nested configuration option are not catered for. This way global configuration options can be used. For nested configurations override this function.

Specified by:

configure in interface Configurable

Overrides:

configure in class AbstractInputModule

Throws:

ConfigurationException

getAttribute

public Object getAttribute(String name,
                           Configuration modeConf,
                           Map objectModel)
                    throws ConfigurationException

Description copied from interface: InputModule

Standard access to an attribute's value. If more than one value exists, the first is returned. If the value does not exist, null is returned. To get all values, use InputModule.getAttributeValues(String, Configuration, Map) or InputModule.getAttributeNames(Configuration, Map) and InputModule.getAttribute(String, Configuration, Map) to get them one by one.

Specified by:

getAttribute in interface InputModule

Overrides:

getAttribute in class AbstractInputModule

Parameters:

name - a String that specifies what the caller thinks would identify an attribute. This is mainly a fallback if no modeConf is present.

modeConf - column's mode configuration from resource description. This argument is optional.

Throws:

ConfigurationException

getAttributeNames

public Iterator getAttributeNames(Configuration modeConf,
                                  Map objectModel)
                           throws ConfigurationException

Description copied from interface: InputModule

Returns an Iterator of String objects containing the names of the attributes available. If no attributes are available, the method returns an empty Iterator.

Specified by:

getAttributeNames in interface InputModule

Overrides:

getAttributeNames in class AbstractInputModule

Parameters:

modeConf - column's mode configuration from resource description. This argument is optional.

Throws:

ConfigurationException

getAttributeValues

public Object[] getAttributeValues(String name,
                                   Configuration modeConf,
                                   Map objectModel)
                            throws ConfigurationException

Description copied from interface: InputModule

Returns an array of String objects containing all of the values the given attribute has, or null if the attribute does not exist. As an alternative, InputModule.getAttributeNames(Configuration, Map) together with InputModule.getAttribute(String, Configuration, Map) can be used to get the values one by one.

Specified by:

getAttributeValues in interface InputModule

Overrides:

getAttributeValues in class AbstractInputModule

Parameters:

name - a String that specifies what the caller thinks would identify an attributes. This is mainly a fallback if no modeConf is present.

modeConf - column's mode configuration from resource description. This argument is optional.

Throws:

ConfigurationException