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When an aspect extends another one and redefine a method, all call to the redefined method are redirected to the new version.
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153 changes: 153 additions & 0 deletions
153
....inria.diverse.melange/src/main/java/fr/inria/diverse/melange/utils/AspectOverrider.xtend
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| Original file line number | Diff line number | Diff line change |
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| package fr.inria.diverse.melange.utils | ||
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| import com.google.common.collect.HashMultimap | ||
| import com.google.common.collect.SetMultimap | ||
| import com.google.inject.Inject | ||
| import fr.inria.diverse.melange.ast.AspectExtensions | ||
| import fr.inria.diverse.melange.ast.LanguageExtensions | ||
| import fr.inria.diverse.melange.eclipse.EclipseProjectHelper | ||
| import fr.inria.diverse.melange.metamodel.melange.Language | ||
| import java.nio.file.Files | ||
| import java.nio.file.Paths | ||
| import java.util.List | ||
| import org.eclipse.core.resources.IProject | ||
| import org.eclipse.core.resources.ResourcesPlugin | ||
| import org.eclipse.xtext.common.types.JvmDeclaredType | ||
| import org.eclipse.xtext.common.types.JvmOperation | ||
| import org.eclipse.core.resources.IResource | ||
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| class AspectOverrider { | ||
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| @Inject extension LanguageExtensions | ||
| @Inject extension AspectExtensions | ||
| @Inject EclipseProjectHelper eclipseHelper | ||
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| def void generateAspectJ(Language l){ | ||
| val packageName = l.aspectsNamespace | ||
| val aspectName = "_MelangeDispatcher" | ||
| val targetProject = ResourcesPlugin.workspace.root.getProject(l.externalRuntimeName) | ||
| val targetAspectFolder = targetProject.locationURI.path + "/src-gen/" + packageName.replaceAll("\\.","/") | ||
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| val aspects = l.semantics.map[it.aspectTypeRef.type as JvmDeclaredType] | ||
| val advices = generateAdvices(aspects) | ||
| if(!advices.isEmpty){ | ||
| val fileContent = new StringBuilder | ||
| fileContent.append("package "+packageName + ";\n\n") | ||
| fileContent.append("public aspect "+aspectName+" {\n") | ||
| fileContent.append(advices) | ||
| fileContent.append("}\n") | ||
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| val path = Paths.get(targetAspectFolder+"/"+aspectName+".aj"); | ||
| val writer = Files.newBufferedWriter(path) | ||
| writer.write(fileContent.toString) | ||
| writer.flush | ||
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| targetProject.convertToAspectJ | ||
| targetProject.refreshLocal(IResource.DEPTH_INFINITE, null); | ||
| } | ||
| } | ||
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| /** | ||
| * Generate AspectJ advice to intercept methods calls when some | ||
| * K3 aspects override others K3 aspects | ||
| */ | ||
| private def String generateAdvices(List<JvmDeclaredType> aspects) { | ||
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| val content = new StringBuilder | ||
| val SetMultimap<JvmOperation, JvmOperation> res = HashMultimap.create | ||
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| // Compute hierarchy | ||
| val SetMultimap<JvmDeclaredType, JvmDeclaredType> overriders = HashMultimap.create | ||
| aspects.forEach[ cls | | ||
| val ancestors = cls.allSuperAspects | ||
| if(!ancestors.isEmpty) | ||
| overriders.putAll(cls,ancestors) | ||
| ] | ||
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| // Find overrides | ||
| overriders.keySet.forEach[ childCls | | ||
| val ancestors = overriders.get(childCls) | ||
| childCls.members.filter(JvmOperation).forEach[ m | | ||
| ancestors.filter[hasMethod(m)].forEach[ superCls | | ||
| // add a new rule | ||
| val target = superCls.members.filter(JvmOperation).findFirst[isEqual(m)] | ||
| res.storeRule(m,target) | ||
| ] | ||
| ] | ||
| ] | ||
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| //Generate AspectJ advice | ||
| if(res.keySet.size > 0) { | ||
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| res.keySet.forEach[ m1 | | ||
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| val returnType = m1.returnType.type.qualifiedName | ||
| val calledMethodFqn = m1.qualifiedName | ||
| val parameters = m1.parameters.map[parameterType.type.qualifiedName+" "+name].join(",") | ||
| val parameterTypes = m1.parameters.map[parameterType.type.qualifiedName].join(",") | ||
| val parameterNames = m1.parameters.map[name].join(",") | ||
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| res.get(m1).forEach[ m2 | | ||
| val targetMethodFqn = m2.qualifiedName | ||
| content.append(" "+returnType+" around("+parameters+") : call("+returnType+" "+targetMethodFqn+"("+parameterTypes+")) && args("+parameterNames+") {\n") | ||
| if(returnType != "void") | ||
| content.append(" return "+calledMethodFqn+"("+parameterNames+");\n") | ||
| else | ||
| content.append(" "+calledMethodFqn+"("+parameterNames+");\n") | ||
| content.append(" }\n") | ||
| ] | ||
| ] | ||
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| return content.toString | ||
| } | ||
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| return "" | ||
| } | ||
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| private def void storeRule(SetMultimap<JvmOperation, JvmOperation> storage, JvmOperation called, JvmOperation hidden){ | ||
| val colider = storage.keySet.findFirst[isEqual(called)] | ||
| if(colider === null || colider === called){ | ||
| storage.put(called,hidden) | ||
| } | ||
| else if(called.declaringType.allSuperAspects.contains(colider.declaringType)){ | ||
| val toMove = storage.get(colider) | ||
| storage.removeAll(colider) | ||
| storage.putAll(called,toMove) | ||
| storage.put(called,hidden) | ||
| } | ||
| } | ||
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| private def boolean hasMethod(JvmDeclaredType cls, JvmOperation method) { | ||
| cls.members.filter(JvmOperation).exists[isEqual(method)] | ||
| } | ||
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| private def boolean isEqual(JvmOperation m1, JvmOperation m2) { | ||
| m1.simpleName == m2.simpleName | ||
| && m1.parameters.size == m2.parameters.size | ||
| && m1.parameters.forall[param | | ||
| val index = m1.parameters.indexOf(param) | ||
| m2.parameters.get(index).parameterType.type == param.parameterType.type | ||
| ] | ||
| } | ||
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| private def List<JvmDeclaredType> getAllSuperAspects(JvmDeclaredType cls) { | ||
| val res = newArrayList | ||
| if(!cls.hasAspectAnnotation) | ||
| return res | ||
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| var current = cls.superTypes.head.type as JvmDeclaredType | ||
| while(current !== null && current.hasAspectAnnotation){ | ||
| res.add(current) | ||
| current = current.superTypes.head.type as JvmDeclaredType | ||
| } | ||
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| return res | ||
| } | ||
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| private def void convertToAspectJ(IProject prj){ | ||
| eclipseHelper.addDependencies(prj,#["org.aspectj.runtime"]) | ||
| eclipseHelper.addNature(prj,"org.eclipse.ajdt.ui.ajnature") | ||
| eclipseHelper.addBuilder(prj,"org.eclipse.ajdt.core.ajbuilder") | ||
| } | ||
| } |