Eclipse Community Forums: MoDisco » Generate Java code from a Java model

Home » Modeling » MoDisco » Generate Java code from a Java model

Generate Java code from a Java model [message #776997]

Mon, 09 January 2012 11:23

Eclipse User

Hey guys,

I want to generate java code from a .xmi model. I extracted the model from a project and now I want to generate code refers to ttp://wiki.eclipse.org/MoDisco/Components/Java/Documentation/0.9#Java_Generation

But when I write the sample code I get an error:

"The type org.eclipse.acceleo.engine.service.AbstractAcceleoGenerator cannot be resolved. It is indirectly referenced from required .class files"

My code:

 	GenerateJavaExtended javaGenerator = new GenerateJavaExtended(URI.createFileURI("../Model.xmi"),
				    new File("../myOutputFolder"), new ArrayList<Object>());
			
	javaGenerator.doGenerate(null);

I added the org.eclipse.gmt.modisco.java.generation as a dependencie to my plugin.xml but it doesn't work.

So can someone help me?

Greetings
Marcus

[Updated on: Mon, 09 January 2012 11:26] by Moderator

Re: Generate Java code from a Java model [message #777306 is a reply to message #776997]

Tue, 10 January 2012 04:03

Eclipse User

Hello,

I think you also have to add the plug-in 'org.eclipse.acceleo.engine' in your plug-in dependencies.

If its works, tell me, I'll update the documentation.

Regards,
Grégoire

Re: Generate Java code from a Java model [message #777678 is a reply to message #777306]

Tue, 10 January 2012 17:06

Eclipse User

Hey Gregoire,

thanks for your reply. It solves my problem, thank you. But now I have a further problem.

Exception in thread "main" java.lang.RuntimeException: Cannot create a resource for 'jar:file:[..]/eclipse/plugins/org.eclipse.gmt.modisco.java.generation_0.9.1.v201109150824.jar!/org/eclipse/gmt/modisco/java/generation/files/GenerateJava.emtl'; a registered resource factory is needed
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getResource(ResourceSetImpl.java:394)
	at org.eclipse.acceleo.common.utils.ModelUtils.load(ModelUtils.java:348)
	at org.eclipse.acceleo.engine.service.AbstractAcceleoGenerator.initialize(AbstractAcceleoGenerator.java:441)
	at org.eclipse.gmt.modisco.java.generation.files.GenerateJava.<init>(GenerateJava.java:85)
	at org.eclipse.gmt.modisco.java.generation.files.GenerateJavaExtended.<init>(GenerateJavaExtended.java:39)
	at MDSDMoDiscoProject.GenerateJavaCode.main(GenerateJavaCode.java:34)

I tried to solve this problem with the following code but it doesn't work:

		
XMIResourceFactoryImpl xmiResourceFactoryImpl = new XMIResourceFactoryImpl() {
			public Resource createResource(URI uri) {
				XMIResource xmiResource = new XMIResourceImpl(uri);
				return xmiResource;
			}
		};

Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put(
		"xmi", xmiResourceFactoryImpl);

Any further advises or tips?

Regards
Marcus

Re: Generate Java code from a Java model [message #777963 is a reply to message #777678]

Wed, 11 January 2012 03:09

Eclipse User

Hello,

I think you haven't installed or enable the plug-in 'org.eclipse.acceleo.model' in your target platform. This plug-in is not required for the compilation but it is required for the execution.

I've opened a bug asking to reexport the required dependencies (Bug 368318).

Regards,
Grégoire

[Updated on: Wed, 11 January 2012 03:10] by Moderator

Re: Generate Java code from a Java model [message #778244 is a reply to message #777963]

Wed, 11 January 2012 17:18

Eclipse User

Hey,

that works for me. Thank you.

I've also added the following dependencies:

com.google.inject;bundle-version="2.0.0",
com.google.collect;bundle-version="1.0.0",
org.eclipse.jdt.core;bundle-version="3.7.1"

I guess the last one was for the code formatter.

Regards,
Marcus

Re: Generate Java code from a Java model [message #790600 is a reply to message #778244]

Sat, 04 February 2012 09:38

Eclipse User

Hello,
unfortunately i don't yet solve the same problem.
I used both method illustrated in online guide but both don't run correctly. I use eclipse Indigo.

The errors are:
- Couldn't load class org.eclipse.gmt.modisco.java.generation.files.GenerateJavaExtended. Check that its containing package is exported. -> if I use the second mode with Acceleo as runner.

- Exception in thread "main" java.lang.RuntimeException: Cannot create a resource for './prova.xmi'; a registered resource factory is needed -> if i use the first mode and also if i use the second mode with Java Application as runner.

I imported all library indicated in this topic but it doesn't run good.

Somebody can explain better how it does?

Thank you.

p.s.: sorry for my english Wink

Re: Generate Java code from a Java model [message #790618 is a reply to message #790600]

Sat, 04 February 2012 10:23

Eclipse User

Hello,
finally i solved the problem!!!

These are the steps (with Eclipse Indigo):
1. import in workspace the plugin org.eclipse.gmt.modisco.java.generation by File/Import/Plugin and fragments;

2. in src folder create a java Classe that like this:

public class Generation {

	public static void main(String[] args) throws IOException {
		XMIResourceFactoryImpl xmiResourceFactoryImpl = new XMIResourceFactoryImpl() {
			public Resource createResource(URI uri) {
				XMIResource xmiResource = new XMIResourceImpl(uri);
				return xmiResource;
			}
		};

		Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put(
				"xmi", xmiResourceFactoryImpl);

		GenerateJavaExtended javaGenerator = new GenerateJavaExtended(
				URI.createFileURI("src/generation/prova.xmi"),
				new File("src/"), new ArrayList<Object>());

		javaGenerator.doGenerate(null);
	}

}

3. Run this as java application.

Thanks Marcus for the Code! Smile

Re: Generate Java code from a Java model [message #804477 is a reply to message #790618]

Wed, 22 February 2012 12:13

Eclipse User

Hi David,

glad that you have succeeded in launching generation from some main() method, calling some xmi resource factory registration.

There are several ways of reusing the generation acceleo module, with several technical difficulties. We recommend this one : invoking GenerateJavaExtended class in one java plugin project, with dependencies to org.eclipse.gmt.modisco.java.generation installed plugin. Then the code must be executed within an eclipse context ("Eclipse Application" Run Config)

Modisco Documentation has been updated (Bug 372090) for focusing on this recommendation.

Regards,
Fabien.

Re: Generate Java code from a Java model [message #939078 is a reply to message #804477]

Wed, 10 October 2012 08:06

Eclipse User

Dear Fabien,

I checked the java generation with the latest modisco release and noticed that:

1. Acceleo misses the emtl file when I import the plugin as a project (java.io.IOException: 'GenerateJava.emtl' not found)

2. When checking out the source from the svn trunk:
a) The svn repository location is outdated:
http://wiki.eclipse.org/MoDisco/JavaGeneration#Install
must be changed to
https://dev.eclipse.org/svnroot/modeling/org.eclipse.mdt.modisco/main/trunk/org.eclipse.gmt.modisco.java.generation/

b) Acceleo requires the generator plugin to have access to some google classes
http://wiki.eclipse.org/Acceleo/FAQ#Exception_in_thread_.22main.22_java.lang.NoClassDefFoundError:_com.2Fgoogle.2Fcommon.2Fbase.2FPredicate
which are meanwhile hosted within the google guava project. The guava plugin might already be installed, but the modisco java generator plugin requires a dependency to com.google.guava

Could you please update the documentation and the java generation project or can you tell me how I could contribute this update to your resources?

Thanks in advance
Benjamin

Re: Generate Java code from a Java model [message #945709 is a reply to message #939078]

Mon, 15 October 2012 11:01

Eclipse User

Hi Benjamin,

thank you for these observations.
2a) i have updated the wiki documentation
2b) i was not aware of these google plugins dependency. I will have a look at it for understanding.

Fabien

Re: Generate Java code from a Java model [message #945970 is a reply to message #945709]

Mon, 15 October 2012 16:36

Eclipse User

Thanks guys. I'm using Java model to generate files .java. Thanks to this forum I have done it. Best Regards

Re: Generate Java code from a Java model [message #994081 is a reply to message #776997]

Wed, 26 December 2012 05:31

Eclipse User

From what i understand, com.google.guava dependency should have been transparantly fixed with Bug 364265.

Re: Generate Java code from a Java model [message #1804023 is a reply to message #994081]

Fri, 15 March 2019 18:51

Eclipse User

Hi
I Tried the discussed steps in Eclipse 2018-12

But I get this error when I ran the generation class :

Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 67, Size: 1
at java.util.ArrayList.rangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at org.eclipse.emf.ecore.impl.EPackageImpl.eObjectForURIFragmentNameSegment(EPackageImpl.java:1970)
at org.eclipse.emf.ecore.impl.EModelElementImpl.eObjectForURIFragmentSegment(EModelElementImpl.java:473)
at org.eclipse.emf.ecore.resource.impl.ResourceImpl.getEObject(ResourceImpl.java:811)
at org.eclipse.emf.ecore.resource.impl.ResourceImpl.getEObject(ResourceImpl.java:787)
at org.eclipse.emf.ecore.xmi.impl.XMLHandler.setValueFromId(XMLHandler.java:2868)
at org.eclipse.emf.ecore.xmi.impl.XMLHandler.setAttribValue(XMLHandler.java:2773)
at org.eclipse.emf.ecore.xmi.impl.SAXXMIHandler.handleObjectAttribs(SAXXMIHandler.java:79)
at org.eclipse.emf.ecore.xmi.impl.XMLHandler.createObjectFromFactory(XMLHandler.java:2247)
at org.eclipse.emf.ecore.xmi.impl.XMLHandler.createObjectFromTypeName(XMLHandler.java:2150)
at org.eclipse.emf.ecore.xmi.impl.XMLHandler.createObject(XMLHandler.java:2085)
at org.eclipse.emf.ecore.xmi.impl.XMIHandler.createObject(XMIHandler.java:151)
at org.eclipse.emf.ecore.xmi.impl.XMLHandler.handleFeature(XMLHandler.java:1868)
at org.eclipse.emf.ecore.xmi.impl.XMLHandler.processElement(XMLHandler.java:1048)
at org.eclipse.emf.ecore.xmi.impl.XMIHandler.processElement(XMIHandler.java:82)
at org.eclipse.emf.ecore.xmi.impl.XMLHandler.startElement(XMLHandler.java:1026)
at org.eclipse.emf.ecore.xmi.impl.XMLHandler.startElement(XMLHandler.java:720)
at org.eclipse.emf.ecore.xmi.impl.XMIHandler.startElement(XMIHandler.java:190)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source)
at org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl.load(XMLLoadImpl.java:175)
at org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl.doLoad(XMLResourceImpl.java:261)
at org.eclipse.acceleo.model.mtl.resource.EMtlResourceImpl.doLoad(EMtlResourceImpl.java:93)
at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1563)
at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1342)
at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoad(ResourceSetImpl.java:259)
at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoadHelper(ResourceSetImpl.java:274)
at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getResource(ResourceSetImpl.java:406)
at org.eclipse.acceleo.common.utils.ModelUtils.load(ModelUtils.java:391)
at org.eclipse.acceleo.common.utils.ModelUtils.load(ModelUtils.java:356)
at org.eclipse.acceleo.engine.service.AbstractAcceleoGenerator.initialize(AbstractAcceleoGenerator.java:485)
at org.eclipse.gmt.modisco.java.generation.files.GenerateJava.<init>(GenerateJava.java:92)
at org.eclipse.gmt.modisco.java.generation.files.GenerateJavaExtended.<init>(GenerateJavaExtended.java:39)
at Generation.main(Generation.java:13)

what's the problem? How can I fix this issue?

Thanks

Previous Topic:	Is it possible to generate Java code from a resource only loaded in memory?
Next Topic:	Problem with Java model to source code transformation

Goto Forum:

-=] Back to Top [=-

Current Time: Thu Jul 24 20:44:21 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter