[MANTTASKS-19] M2/ANT : Weird ClassCastException in <m:pom> in macrodef when calling Beanshell scripting.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Environment: - ANT 1.6.5 (with bsh-2.0b4.jar in ANT_HOME/lib); - JDK 1.5
• Assignee: Unassigned
• Reporter: Davy Toch
• Created: 17/Aug/06 06:12
• Updated: 26/May/07 11:02
• Resolved: 26/May/07 11:02

Description

Hi,

In ANT, sometimes more than one artifact is generated from the same
build file (e.g. myapp.jar, myapp-client.jar, myapp-with-deps.jar).

If using the M2 plugin for ANT (currently 2.0.4), this would mean
we would need three POM's for the above 3 artifacts. However, in the
above case the 3 POM's would be almost identical.

So I have taken the following approach in order to have only one generic
POM:

pom.xml (with ANT tokens TOKEN...):

<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>be.steria.test</groupId>
<artifactId>TOKEN_ARTIFACTID</artifactId>
<packaging>TOKEN_PACKAGING</packaging>
<version>1.5-SNAPSHOT</version>
<description>Test artifact</description>
<dependencies>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.9</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<distributionManagement>
<repository>
<id>repo_dev</id>
<url>scp://localhost/m2demo/repo_dev</url>
</repository>
</distributionManagement>
</project>

build.xml:

<project name="example-ant-using-m2-plugin" default="m2init"
xmlns:m="antlib:org.apache.maven.artifact.ant">

<macrodef name="create-pom">
<attribute name="pomRefId"/>
<attribute name="artifactId"/>
<attribute name="packaging" default="jar"/>
<sequential>
<!-- IMPORTANT : derived POM files must be generated in the same
folder as pom.xml, otherwise the paths, ... will be incorrect -->
<copy file="pom.xml" filtering="true"
toFile="pom-@

{pomRefId}.derived.xml">
<filterchain>
<tokenfilter>
<replacestring from="TOKEN_ARTIFACTID"
to="@{artifactId}"/>
<replacestring from="TOKEN_PACKAGING"
to="@{packaging}"/>
</tokenfilter>
</filterchain>
</copy>
<m:pom id="@{pomRefId}

" file="pom-@

{pomRefId}

.derived.xml"/>
</sequential>
</macrodef>

<target name="m2init">

<m:pom id="M2POM" file="pom.xml"/>

<!-- causes ClassCastException in macrodef 'create-pom' -->
<!-script language="beanshell"/->

<!-- create POM's on-the-fly (one for each artifact) -->
<create-pom pomRefId="M2POM_MYAPP" artifactId="myapp"/>
<create-pom pomRefId="M2POM_MYAPP_CLIENT" artifactId="myapp-client"/>
<create-pom pomRefId="M2POM_MYAPP_WITH_DEPS" artifactId="myapp-with-deps"/>

</target>

<target name="package" depends="m2init">
<!-- ... generate artifacts (pure ANT) ... -->
</target>

<target name="install" depends="package">
<m:install file="myapp.jar"
pomRefId="M2POM_MYAPP"/>
<m:install file="myapp-client.jar"
pomRefId="M2POM_MYAPP_CLIENT"/>
<m:install file="myapp-with-deps.jar"
pomRefId="M2POM_MYAPP_WITH_DEPS"/>
</target>

<target name="deploy">
<m:deploy file="myapp.jar"
pomRefId="M2POM_MYAPP"/>
<m:deploy file="myapp-client.jar"
pomRefId="M2POM_MYAPP_CLIENT"/>
<m:deploy file="myapp-with-deps.jar"
pomRefId="M2POM_MYAPP_WITH_DEPS"/>
</target>

</project>

Now if I execute the above, everything works fine, but if I add <script
language="beanshell"/> in the target 'm2init', then the following error
is generated on the first <create-pom> call:

"java.lang.ClassCastException: org.apache.maven.artifact.ant.Pom"

Regards,
Davy Toch