Package org.oddjob.arooa.beanutils

Class MagicBeanDescriptorFactory

java.lang.Object
org.oddjob.arooa.beanutils.MagicBeanDescriptorFactory
All Implemented Interfaces:
ArooaDescriptorFactory
public class MagicBeanDescriptorFactory extends Object implements ArooaDescriptorFactory
Author:
rob

Description

Define Magic Beans. Magic Beans are beans who's properties can be defined dynamically. Magic beans are useful when you want to collect information in one bean so it can be kept together.

Example

Creating a magic bean that define some file information.

This is an outer Oddjob configuration file that creates the descriptor that defines properties for a filespec element. 

<oddjob id="this">

    <job>

        <oddjob file="${this.dir}/MagicBeansInner.xml">

            <descriptorFactory>

                <arooa:magic-beans namespace="oddjob:magic" prefix="magic" xmlns:arooa="http://rgordon.co.uk/oddjob/arooa">

                    <definitions>

                        <is element="filespec">

                            <properties>

                                <is name="description" type="java.lang.String"/>

                                <is name="file" type="java.io.File" configured="ATTRIBUTE"/>

                                <is name="maxSize" type="java.lang.Long"/>

                            </properties>

                        </is>

                    </definitions>

                </arooa:magic-beans>

            </descriptorFactory>

        </oddjob>

    </job>

</oddjob>
The nested inner Oddjob configuration uses a list of filespec magic beans to define information for a For Each job. 
<oddjob>

  <job>

    <foreach>

      <values>

        <list>

          <values>

            <magic:filespec description="Big File" file="/files/big" maxSize="1000000" xmlns:magic="oddjob:magic"/>

            <magic:filespec description="Medium File" file="/files/medium" maxSize="20000" xmlns:magic="oddjob:magic"/>

            <magic:filespec description="Small File" file="/files/small" maxSize="3000" xmlns:magic="oddjob:magic"/>

          </values>

        </list>

      </values>

      <configuration>

        <xml>

          <foreach id="each">

            <job>

              <echo>

Checking ${each.current.description} (${each.current.file})

less than ${each.current.maxSize} bytes...</echo>

            </job>

          </foreach>

        </xml>

      </configuration>

    </foreach>

  </job>

</oddjob>
The example will display the following when ran: 
 Checking Big File (\files\big)
 less than 1000000 bytes...

 Checking Medium File (\files\medium)
 less than 20000 bytes...
 
 Checking Small File (\files\small)
 less than 3000 bytes...

  • Constructor Details

    • MagicBeanDescriptorFactory

      public MagicBeanDescriptorFactory()

  • Method Details