org.apache.cayenne.access.jdbc

## Class ChunkDirective

- java.lang.Object
- - org.apache.velocity.runtime.directive.Directive
  - - org.apache.cayenne.access.jdbc.ChunkDirective

- All Implemented Interfaces:
    Cloneable, org.apache.velocity.runtime.directive.DirectiveConstants

      public class ChunkDirective
      extends org.apache.velocity.runtime.directive.Directive

  A custom Velocity directive to describe a conditional chunk of a `chain`. Usage of chunk is the following:

       #chunk()...#end - e.g. #chunk()A = 5#end
       #chunk($paramKey)...#end - e.g. #chunk($a)A = $a#end

  If context contains paramKey and it's value isn't null, chunk is included in the chain, and if it is not the first chunk, it is prefixed with chain join (OR/AND). If context doesn't contain paramKey or it's value is null, chunk is skipped.

  Since:
    1.1

- - ### Field Summary

    - ### Fields inherited from class org.apache.velocity.runtime.directive.Directive

      `rsvc`

    - ### Fields inherited from interface org.apache.velocity.runtime.directive.DirectiveConstants

      `BLOCK, LINE`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ChunkDirective()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `String` | `getName()`
    `int` | `getType()`
    `boolean` | `render(org.apache.velocity.context.InternalContextAdapter context, Writer writer, org.apache.velocity.runtime.parser.node.Node node)`

    - ### Methods inherited from class org.apache.velocity.runtime.directive.Directive

      `getColumn, getLine, init, setLocation`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### ChunkDirective

          public ChunkDirective()

  - ### Method Detail

    - #### getName

          public String getName()

      Specified by:
        `getName` in class `org.apache.velocity.runtime.directive.Directive`

    - #### getType

          public int getType()

      Specified by:
        `getType` in class `org.apache.velocity.runtime.directive.Directive`

    - #### render

          public boolean render(org.apache.velocity.context.InternalContextAdapter context,
                                Writer writer,
                                org.apache.velocity.runtime.parser.node.Node node)
                         throws IOException,
                                org.apache.velocity.exception.ResourceNotFoundException,
                                org.apache.velocity.exception.ParseErrorException,
                                org.apache.velocity.exception.MethodInvocationException

      Specified by:
        `render` in class `org.apache.velocity.runtime.directive.Directive`
      Throws:
        `IOException`
        `org.apache.velocity.exception.ResourceNotFoundException`
        `org.apache.velocity.exception.ParseErrorException`
        `org.apache.velocity.exception.MethodInvocationException`

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