J2K: fixed usage processing scheme to cover exotic case with anonymous class

j2k/src/org/jetbrains/jet/j2k/Converter.kt

@@ -40,10 +40,9 @@ class Converter private(private val elementToConvert: PsiElement,
                         private val personalState: Converter.PersonalState) {
 
     // state which is shared between all converter's based on this one
-    private class CommonState {
+    private class CommonState(val usageProcessingsCollector: (UsageProcessing) -> Unit) {
         val importsToAdd = LinkedHashSet<String>()
         val deferredElements = ArrayList<DeferredElement<*>>()
-        val usageProcessings = ArrayList<UsageProcessing>()
         val postUnfoldActions = ArrayList<() -> Unit>()
     }
 
@@ -62,8 +61,9 @@ class Converter private(private val elementToConvert: PsiElement,
 
     class object {
         public fun create(elementToConvert: PsiElement, settings: ConverterSettings, conversionScope: ConversionScope,
-                          referenceSearcher: ReferenceSearcher, lazyResolveSessionGetter: ((JetElement) -> KotlinCodeAnalyzer)?, postProcessor: PostProcessor?): Converter {
-            return Converter(elementToConvert, settings, conversionScope, referenceSearcher, lazyResolveSessionGetter, postProcessor, CommonState(), PersonalState(null))
+                          referenceSearcher: ReferenceSearcher, lazyResolveSessionGetter: ((JetElement) -> KotlinCodeAnalyzer)?, postProcessor: PostProcessor?,
+                          usageProcessingsCollector: (UsageProcessing) -> Unit): Converter {
+            return Converter(elementToConvert, settings, conversionScope, referenceSearcher, lazyResolveSessionGetter, postProcessor, CommonState(usageProcessingsCollector), PersonalState(null))
         }
     }
 
@@ -75,22 +75,19 @@ class Converter private(private val elementToConvert: PsiElement,
     private fun createDefaultCodeConverter() = CodeConverter(this, DefaultExpressionConverter(), DefaultStatementConverter(), null)
 
     public trait IntermediateResult {
-        fun finishConversion(usageProcessings: Collection<UsageProcessing>): String
-        val usageProcessings: Collection<UsageProcessing>
+        fun finishConversion(usageProcessings: Map<PsiElement, UsageProcessing>): String
     }
 
     public fun convert(): IntermediateResult? {
         val element = convertTopElement(elementToConvert) ?: return null
         return object: IntermediateResult {
-            override fun finishConversion(usageProcessings: Collection<UsageProcessing>): String {
+            override fun finishConversion(usageProcessings: Map<PsiElement, UsageProcessing>): String {
                 unfoldDeferredElements(usageProcessings)
 
                 val builder = CodeBuilder(elementToConvert)
                 builder.append(element)
                 return builder.result
             }
-
-            override val usageProcessings: Collection<UsageProcessing> = commonState.usageProcessings
         }
     }
 
@@ -108,7 +105,7 @@ class Converter private(private val elementToConvert: PsiElement,
         else -> null
     }
 
-    private fun unfoldDeferredElements(usageProcessings: Collection<UsageProcessing>) {
+    private fun unfoldDeferredElements(usageProcessings: Map<PsiElement, UsageProcessing>) {
         val codeConverter = createDefaultCodeConverter().withSpecialExpressionConverter(UsageProcessingExpressionConverter(usageProcessings))
 
         // we use loop with index because new deferred elements can be added during unfolding
@@ -128,7 +125,7 @@ class Converter private(private val elementToConvert: PsiElement,
     }
 
     public fun addUsageProcessing(processing: UsageProcessing) {
-        commonState.usageProcessings.add(processing)
+        commonState.usageProcessingsCollector(processing)
     }
 
     public fun addPostUnfoldDeferredElementsAction(action: () -> Unit) {

j2k/src/org/jetbrains/jet/j2k/JavaToKotlinConverter.kt

@@ -28,6 +28,7 @@ import java.util.ArrayList
 import org.jetbrains.jet.j2k.usageProcessing.UsageProcessing
 import org.jetbrains.jet.lang.psi.JetElement
 import org.jetbrains.jet.lang.resolve.lazy.KotlinCodeAnalyzer
+import java.util.HashMap
 
 public trait ConversionScope {
     public fun contains(element: PsiElement): Boolean
@@ -53,12 +54,16 @@ public class JavaToKotlinConverter(private val project: Project,
     public fun elementsToKotlin(psiElementsAndProcessors: List<Pair<PsiElement, PostProcessor?>>): List<String> {
         try {
             val intermediateResults = ArrayList<Converter.IntermediateResult?>(psiElementsAndProcessors.size)
-            val usageProcessings = ArrayList<UsageProcessing>()
+            val usageProcessings = HashMap<PsiElement, UsageProcessing>()
+            val usageProcessingCollector: (UsageProcessing) -> Unit = { usageProcessing ->
+                assert(!usageProcessings.containsKey(usageProcessing.targetElement))
+                    { "Duplicated UsageProcessing for target element ${usageProcessing.targetElement}" }
+                usageProcessings.put(usageProcessing.targetElement, usageProcessing)
+            }
             for ((psiElement, postProcessor) in psiElementsAndProcessors) {
-                val converter = Converter.create(psiElement, settings, conversionScope, referenceSearcher, lazyResolveSessionGetter, postProcessor)
+                val converter = Converter.create(psiElement, settings, conversionScope, referenceSearcher, lazyResolveSessionGetter, postProcessor, usageProcessingCollector)
                 val result = converter.convert()
                 intermediateResults.add(result)
-                result?.usageProcessings?.let { usageProcessings.addAll(it) }
             }
 
             val results = ArrayList<String>(psiElementsAndProcessors.size)

j2k/src/org/jetbrains/jet/j2k/usageProcessing/UsageProcessing.kt

@@ -38,22 +38,20 @@ trait ExternalCodeProcessor {
     fun processUsage(reference: PsiReference)
 }
 
-class UsageProcessingExpressionConverter(processings: Collection<UsageProcessing>) : SpecialExpressionConverter {
-    private val targetToProcessing = processings.toMap { it.targetElement } // we assume that there will be no more than one processing for one target element
-
+class UsageProcessingExpressionConverter(val processings: Map<PsiElement, UsageProcessing>) : SpecialExpressionConverter {
     override fun convertExpression(expression: PsiExpression, codeConverter: CodeConverter): Expression? {
-        if (targetToProcessing.isEmpty()) return null
+        if (processings.isEmpty()) return null
 
         when (expression) {
             is PsiReferenceExpression -> {
                 val target = expression.resolve() as? PsiVariable ?: return null
-                val processor = targetToProcessing[target]?.convertedCodeProcessor ?: return null
+                val processor = processings[target]?.convertedCodeProcessor ?: return null
                 return processor.convertVariableUsage(expression, codeConverter)
             }
 
             is PsiMethodCallExpression -> {
                 val target = expression.getMethodExpression().resolve() as? PsiMethod ?: return null
-                val processor = targetToProcessing[target]?.convertedCodeProcessor ?: return null
+                val processor = processings[target]?.convertedCodeProcessor ?: return null
                 return processor.convertMethodUsage(expression, codeConverter)
             }
 

j2k/tests/test/org/jetbrains/jet/j2k/test/JavaToKotlinConverterForWebDemoTestGenerated.java

@@ -1317,6 +1317,12 @@ public class JavaToKotlinConverterForWebDemoTestGenerated extends AbstractJavaTo
             JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("j2k/tests/testData/fileOrElement/dropAccessors"), Pattern.compile("^(.+)\\.java$"), true);
         }
 
+        @TestMetadata("AnonymousClass.java")
+        public void testAnonymousClass() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("j2k/tests/testData/fileOrElement/dropAccessors/AnonymousClass.java");
+            doTest(fileName);
+        }
+
         @TestMetadata("CannotDropOnlySetter.java")
         public void testCannotDropOnlySetter() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("j2k/tests/testData/fileOrElement/dropAccessors/CannotDropOnlySetter.java");

j2k/tests/test/org/jetbrains/jet/j2k/test/JavaToKotlinConverterSingleFileTestGenerated.java

@@ -1317,6 +1317,12 @@ public class JavaToKotlinConverterSingleFileTestGenerated extends AbstractJavaTo
             JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("j2k/tests/testData/fileOrElement/dropAccessors"), Pattern.compile("^(.+)\\.java$"), true);
         }
 
+        @TestMetadata("AnonymousClass.java")
+        public void testAnonymousClass() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("j2k/tests/testData/fileOrElement/dropAccessors/AnonymousClass.java");
+            doTest(fileName);
+        }
+
         @TestMetadata("CannotDropOnlySetter.java")
         public void testCannotDropOnlySetter() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("j2k/tests/testData/fileOrElement/dropAccessors/CannotDropOnlySetter.java");

j2k/tests/testData/fileOrElement/dropAccessors/AnonymousClass.java

@@ -0,0 +1,14 @@
+public class X {
+    void foo() {
+        Runnable runnable = new Runnable() {
+            int f = 10;
+
+            int getValue() { return f; }
+
+            @Override
+            public void run() {
+                System.out.println(getValue());
+            }
+        };
+    }
+}

j2k/tests/testData/fileOrElement/dropAccessors/AnonymousClass.kt

@@ -0,0 +1,11 @@
+public class X {
+    fun foo() {
+        val runnable = object : Runnable {
+            var value = 10
+
+            override fun run() {
+                System.out.println(value)
+            }
+        }
+    }
+}