[Openoss-devel] Soap Generator fails on empty model

[Craig G. (opennms) <cg...@op...>]

Xose,

This is a minor bug which may cause confusion when people start using 
tigerstripe.

When I run the Soap Generator against an empty model project I get the 
following error;

Unexpected error while merging 'templates/dependencyAnalyzer.vm' 
template: Invocation of method 'getPackagesFromArtifacts' in  class 
org.eclipse.tigerstripe.generators.xml.helpers.ModelHelpers threw 
exception java.lang.ClassCastException: $Proxy12 cannot be cast to 
org.eclipse.tigerstripe.workbench.internal.core.model.AbstractArtifact @ 
templates/dependencyAnalyzer.vm[4,43]. Generation may be incomplete.

Details;
org.eclipse.tigerstripe.workbench.TigerstripeException: Unexpected error 
while merging 'templates/dependencyAnalyzer.vm' template: Invocation of 
method 'getPackagesFromArtifacts' in  class 
org.eclipse.tigerstripe.generators.xml.helpers.ModelHelpers threw 
exception java.lang.ClassCastException: $Proxy12 cannot be cast to 
org.eclipse.tigerstripe.workbench.internal.core.model.AbstractArtifact @ 
templates/dependencyAnalyzer.vm[4,43]
     at 
org.eclipse.tigerstripe.workbench.internal.core.project.pluggable.rules.GlobalTemplateRule.trigger(GlobalTemplateRule.java:183)
     at 
org.eclipse.tigerstripe.workbench.internal.core.plugin.pluggable.PluginRuleExecutor.trigger(PluginRuleExecutor.java:80)
     at 
org.eclipse.tigerstripe.workbench.internal.core.plugin.pluggable.PluggablePlugin.trigger(PluggablePlugin.java:158)
     at 
org.eclipse.tigerstripe.workbench.internal.core.plugin.PluginHousing.trigger(PluginHousing.java:35)
     at 
org.eclipse.tigerstripe.workbench.internal.core.plugin.PluginConfig.trigger(PluginConfig.java:259)
     at 
org.eclipse.tigerstripe.workbench.internal.core.generation.M1Generator.internalPluginLoop(M1Generator.java:671)
     at 
org.eclipse.tigerstripe.workbench.internal.core.generation.M1Generator.internalRun(M1Generator.java:613)
     at 
org.eclipse.tigerstripe.workbench.internal.core.generation.M1Generator.run(M1Generator.java:349)
     at 
org.eclipse.tigerstripe.workbench.internal.api.impl.TigerstripeProjectHandle.generate(TigerstripeProjectHandle.java:514)
     at 
org.eclipse.tigerstripe.workbench.ui.internal.wizards.generate.NewTigerstripeRunWizard.finishPage(NewTigerstripeRunWizard.java:95)
     at 
org.eclipse.tigerstripe.workbench.ui.internal.wizards.NewTSElementWizard$2.run(NewTSElementWizard.java:154)
     at 
org.eclipse.jdt.internal.core.BatchOperation.executeOperation(BatchOperation.java:39)
     at 
org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:728)
     at 
org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1975)
     at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:4777)
     at 
org.eclipse.jdt.internal.ui.actions.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:106)
     at 
org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
org.apache.velocity.exception.MethodInvocationException: Invocation of 
method 'getPackagesFromArtifacts' in  class 
org.eclipse.tigerstripe.generators.xml.helpers.ModelHelpers threw 
exception java.lang.ClassCastException: $Proxy12 cannot be cast to 
org.eclipse.tigerstripe.workbench.internal.core.model.AbstractArtifact @ 
templates/dependencyAnalyzer.vm[4,43]
     at 
org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:286)
     at 
org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:203)
     at 
org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:419)
     at 
org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:73)
     at 
org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:125)
     at 
org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318)
     at org.apache.velocity.Template.merge(Template.java:254)
     at 
org.eclipse.tigerstripe.workbench.internal.core.project.pluggable.rules.GlobalTemplateRule.trigger(GlobalTemplateRule.java:162)
     at 
org.eclipse.tigerstripe.workbench.internal.core.plugin.pluggable.PluginRuleExecutor.trigger(PluginRuleExecutor.java:80)
     at 
org.eclipse.tigerstripe.workbench.internal.core.plugin.pluggable.PluggablePlugin.trigger(PluggablePlugin.java:158)
     at 
org.eclipse.tigerstripe.workbench.internal.core.plugin.PluginHousing.trigger(PluginHousing.java:35)
     at 
org.eclipse.tigerstripe.workbench.internal.core.plugin.PluginConfig.trigger(PluginConfig.java:259)
     at 
org.eclipse.tigerstripe.workbench.internal.core.generation.M1Generator.internalPluginLoop(M1Generator.java:671)
     at 
org.eclipse.tigerstripe.workbench.internal.core.generation.M1Generator.internalRun(M1Generator.java:613)
     at 
org.eclipse.tigerstripe.workbench.internal.core.generation.M1Generator.run(M1Generator.java:349)
     at 
org.eclipse.tigerstripe.workbench.internal.api.impl.TigerstripeProjectHandle.generate(TigerstripeProjectHandle.java:514)
     at 
org.eclipse.tigerstripe.workbench.ui.internal.wizards.generate.NewTigerstripeRunWizard.finishPage(NewTigerstripeRunWizard.java:95)
     at 
org.eclipse.tigerstripe.workbench.ui.internal.wizards.NewTSElementWizard$2.run(NewTSElementWizard.java:154)
     at 
org.eclipse.jdt.internal.core.BatchOperation.executeOperation(BatchOperation.java:39)
     at 
org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:728)
     at 
org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1975)
     at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:4777)
     at 
org.eclipse.jdt.internal.ui.actions.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:106)
     at 
org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
Caused by: java.lang.ClassCastException: $Proxy12 cannot be cast to 
org.eclipse.tigerstripe.workbench.internal.core.model.AbstractArtifact
     at 
org.eclipse.tigerstripe.generators.xml.helpers.ModelHelpers.getPackagesFromArtifacts(ModelHelpers.java:235)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at 
org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:295)
     at 
org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:245)
     ... 23 more


To reproduce
1. In Eclipse select New>tigerstripe Project and create a new project
2. in tigerstripe.xml enable Soap Generator
3. generate model in work space

If there is an entity in the model, this problem disappears.
It looks like having no artifacts in an empty model causes the soap 
generator to fail. You may want to check that the dependencyAnalyser can 
cope with empty models as this will be the default state for new 
projects created by the project creator.

Cheers
Craig