codegeneration.txt

* modello list of model files (as String)
  http://modello.codehaus.org/modello-maven-plugin/java-mojo.html 
* antlr3 uses sourceDirectory+includes+excludes and libDirectory
  http://www.antlr.org/antlr3-maven-plugin/usage.html
* jvnet:jaxb2 has most elaborate model for up-to-date check among plugins I've seen, relevant parameters
  schemaDirectory+schemaIncludes+schemaExcludes, bindingDirectory+bindingIncludes+bindingExcludes, 
  catalog, produces (patters of files produced by this plugin), otherDepends
  http://static.highsource.org/mjiip/maven-jaxb2-plugin/generate-mojo.html
* cxf-codegen-plugin generates java from wsdl. several ways to specify input
  wsdlRoot+includes+excludes, 
  wsdl+bindingFiles <= CUSTOM data objects!!!
  http://cxf.apache.org/docs/maven-cxf-codegen-plugin-wsdl-to-java.html
* jaxws-maven-plugin goes the other way around, it takes java class and generates jax-ws/wsdl descriptors
  http://jax-ws-commons.java.net/jaxws-maven-plugin/wsgen-mojo.html
* maven-jibx-plugin 
  schemaLocation+includes+excludes,
  includeBaseBindings  <= CUSTOM data objects!!!
  http://jibx.sourceforge.net/maven-jibx-plugin/schema-codegen-mojo.html

Ways to define generation inputs
* directory+includes+excludes (possibly more than one)
* list of input file paths as Strings
* list of Files (jvnet:jaxb2 otherDepends)
* collection of directory+includes+excludes
* custom data structures



=== modello

<codegeneration>
  <outputDirectories>
    <outputDirectory>${mojo.outputDirectory}</outputDirectory>
  </outputDirectories>

  <!--
    this is mostly theoretical exercise because modello
    plexus-build-api and m2e does not need to know input sources.
    still, using List<String> is a legitimate way to define generation input sources,
    and we may want to support it even though there are no existing examples 
  -->
  <inputPaths>${mojo.models}</inputPaths>

  <!-- 
    for plexus-build-api and later tesla-build-avoidance users, 
    we need to force incremental build support even when no generation input is declared 
  -->
  <incremental>true</incremental> 
</codegeneration>


=== antlr3

<codegeneration>
  <outputDirectories>
    <outputDirectory>${mojo.outputDirectory}</outputDirectory>
  </outputDirectories>

  <inputResources>
    <inputResource>
      <directory>${mojo.sourceDirectory}</directory>
      <includes>${mojo.includes}</includes>
      <excludes>${mojo.excludes}</excludes>
    </inputResource>
    <inputResource>
      <directory>${mojo.libDirectory}</directory>
    </inputResource>
  <inputResources>
</codegeneration>


=== jvnet:jaxb2

<codegeneration>
  <outputDirectories>
    <outputDirectory>${mojo.generateDirectory}</outputDirectory>
  </outputDirectories>

  <inputResources>
    <inputResource>
      <directory>${mojo.schemaDirectory}</directory>
      <includes>${mojo.schemaIncludes}</includes>
      <excludes>${mojo.schemaExcludes}</excludes>
    </inputResource>
    <inputResource>
      <directory>${mojo.bindingDirectory}</directory>
      <includes>${mojo.bindingIncludes}</includes>
      <excludes>${mojo.bindingExcludes}</excludes>
    </inputResource>
  <inputResources>

  <inputFiles>${mojo.otherDepends}</inputFiles>
</codegeneration>


=== jibx