Chapter 20. Compact Node Type (CND) Sequencer

20.1. Example

This sequencer processes JCR Compact Node Definition (CND) files to extract the node definitions with their property definitions, and inserts these into the repository using JCR built-in types. The node structure generated by this sequencer is equivalent to the node structure used in /jcr:system/jcr:nodeTypes.

20.1. Example

This sequencer generates a graph structure that corresponds to what can be found in the /jcr:system/jcr:nodeTypes subtree. As an example, the CND file below:

<mode = "http://www.modeshape.org/1.0">
	    
// My CND type
[mode:example] mixin
- mode:name (string) multiple copy
+ mode:child (mode:example) = mode:example version

The resulting graph structure (listed in the JCR document view) contains the node type information from the CND file above. Note that comments are not sequenced.




<mode:example jcr:primaryType="nt:nodeType"  

              jcr:mixinTypes="mode:derived"

              mode:derivedAt="2011-05-13T13:12:03.925Z"

              mode:derivedFrom="/files/docForReferenceGuide.xml"

              jcr:nodeTypeName="mode:example"

              jcr:supertypes="nt:base"

              jcr:isAbstract="false"

              jcr:isMixin="true"

              jcr:isQueryable="true"

              jcr:hasOrderableChildNodes="false">

  <nt:propertyDefinition jcr:name="mode:name"

                         jcr:autoCreated="false"

                         jcr:mandatory="false"

                         jcr:isFullTextSearchable="true"

                         jcr:isQueryOrderable="true"

                         jcr:onParentVersion="copy"

                         jcr:protected="false"

                         jcr:requiredType="STRING"

                         jcr:availableQueryOperators="= > >= < <= <> LIKE"

                         jcr:multiple="true" />

  <nt:childNodeDefinition jcr:name="mode:child"

                          jcr:autoCreated="false"

                          jcr:mandatory="false"

                          jcr:onParentVersion="VERSION"

                          jcr:protected="false"

                          jcr:requiredPrimaryTypes="mode:example"

                          jcr:defaultPrimaryType="mode:example"

                          jcr:sameNameSiblings="false" />                           

</mode:example>

This sequencer can be added to the repository configuration like so:



JcrConfiguration config = ...


config.sequencer("CND Sequencer")

      .usingClass("org.modeshape.sequencer.cnd.CndSequencer")

      .loadedFromClasspath()

      .setDescription("Sequences CND files to extract the node type definitions")

      .sequencingFrom("//(*.cnd[*])/jcr:content[@jcr:data]")

      .andOutputtingTo("/nodeTypes/$1");