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ATL/User Guide - Building ATL With ANT And Maven
< ATL
The Problem
Currently Maven doesn't provide any plugin to compile ATL files and given such limitations a workaround is necessary. A custom ANT task has been developed that receives .atl files as input and then compiles them into .asm files. The following instructions describe how to set up a project to compile ATL files.
ATL Compilation ANT Task
- Create a new project to contain the ATL compilation ANT task
- Create the ANT task using the following code:
package com.x.ant;
import java.io.File;
import java.io.FileInputStream;
import java.util.Iterator;
import java.util.Vector;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.types.FileSet;
import org.apache.tools.ant.types.resources.FileResource;
import org.apache.tools.ant.types.resources.FileResourceIterator;
import org.eclipse.m2m.atl.engine.compiler.atl2006.Atl2006Compiler;
public class AtlCompilerTask extends Task {
private Atl2006Compiler compiler = new Atl2006Compiler();
private Vector<FileSet> filesets = new Vector<FileSet>();
public AtlCompilerTask() {
Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
}
public void addFileset(FileSet fileset) {
filesets.add(fileset);
}
@Override
public void execute() throws BuildException {
try {
//iterate over all the FileSet(s) passed in from ANT
for(Iterator<FileSet> itFSets = filesets.iterator(); itFSets.hasNext();)
{
//get a FileSet
FileSet fs = itFSets.next();
FileResourceIterator iter = (FileResourceIterator)fs.iterator();
//loop over all the files in a given FileSet
while(iter.hasNext())
{
FileResource fr = (FileResource)iter.next();
File file = fr.getFile();
//compile each ATL file suffixing it with .asm
compiler.compile(new FileInputStream(file),file.getAbsolutePath().replace(".atl", ".asm"));
}
}
}
catch (Exception e) {
e.printStackTrace();
throw new BuildException("Exception while calling the ATL compiler task.", e);
}
}
}
- Ensure you have all the ATL dependencies on your ANT builder classpath
ATL Compilation Maven Build
- We assume the ANT task defined above exists in your workspace
- Add a build procedure to the .pom file located in the project for which you wish to compile its .atl sources, as follows:
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.7</version>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<configuration>
<target>
<property name="com.x.ant.location" value="../com.x.ant" />
<property name="dependency-classpath" refid="maven.dependency.classpath" />
<echo message="Start ATL compilation" />
<echo message="Maven Dependencies: ${dependency-classpath}" />
<taskdef name="compileATL"
classpath="${com.x.ant.location}/target/AtlCompilerTask.jar"
classname="com.x.ant.AtlCompilerTask" classpathref="maven.dependency.classpath" />
<compileATL>
<fileset dir="${basedir}/ATL" includes="**/*.atl" />
</compileATL>
<echo message="Done!" />
</target>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
- If not already done, add a reference to the ATL folder in your project's build.properties, so that all .atl and .asm files can be included inside the jar generated for that particular project module, as follows:
source.. = src/ output.. = bin/ bin.includes = META-INF/,\ .,\ ATL/,\ plugin.properties
Some notes:
- The build section is executed during compilation phase, invoking the task<compileATL> defined in AtlCompilerTask.jar This task receives as input all references to those files ended with .atl suffix under the folder ATL and then starts their compilation, creating their equivalent .asm file. It's mandatory that AtlCompilerTask.jar exists just before executing the ant script, for this reason the project com.x.ant should always be compiled before any project that uses ATL.
- If you have any sort of dependency errors regarding ATL libraries, it's most likely that you need to update the MANIFEST.MF file with those missing libraries.
Maven reads this file in order to figure out which jars should be downloaded from the local or remote repositories and then adds them to the project's classpath. For example your Manifest.MF may need:
Require-Bundle: org.eclipse.ui, org.eclipse.core.runtime;bundle-version="3.4.0", org.eclipse.core.resources;bundle-version="3.4.2", org.eclipse.m2m.atl.core.emf;bundle-version="3.2.1";visibility:=reexport, org.eclipse.m2m.atl;bundle-version="3.2.1", org.eclipse.m2m.atl.adt;bundle-version="3.2.1", org.eclipse.m2m.atl.adt.debug;bundle-version="3.2.1", org.eclipse.m2m.atl.adt.editor;bundle-version="3.2.1", org.eclipse.m2m.atl.adt.ui;bundle-version="3.2.1", org.eclipse.m2m.atl.cheatsheets;bundle-version="3.2.1", org.eclipse.m2m.atl.common;bundle-version="3.2.1", org.eclipse.m2m.atl.core.ant;bundle-version="3.2.1", org.eclipse.m2m.atl.core.ui;bundle-version="3.2.1", org.eclipse.m2m.atl.core.ui.vm;bundle-version="3.2.1", org.eclipse.m2m.atl.debug.core;bundle-version="3.2.1", org.eclipse.m2m.atl.doc;bundle-version="3.2.1", org.eclipse.m2m.atl.drivers.emf4atl;bundle-version="3.2.1", org.eclipse.m2m.atl.drivers.uml24atl;bundle-version="3.2.1", org.eclipse.m2m.atl.dsls;bundle-version="3.2.1", org.eclipse.m2m.atl.engine;bundle-version="3.2.1", org.eclipse.m2m.atl.engine.emfvm;bundle-version="3.2.1", org.eclipse.m2m.atl.engine.emfvm.launch;bundle-version="3.2.1", org.eclipse.m2m.atl.engine.vm;bundle-version="3.2.1", org.eclipse.m2m.atl.examples;bundle-version="3.2.1", org.eclipse.m2m.atl.profiler.core;bundle-version="3.2.1", org.eclipse.m2m.atl.profiler.emfvm;bundle-version="3.2.1", org.eclipse.m2m.atl.profiler.exportmodel;bundle-version="3.2.1", org.eclipse.m2m.atl.profiler.exportmodel.editor;bundle-version="3.2.1", org.eclipse.m2m.atl.profiler.model;bundle-version="3.2.1", org.eclipse.m2m.atl.profiler.ui;bundle-version="3.2.1", org.eclipse.m2m.atl.profiler.vm;bundle-version="3.2.1"