use custom exception class to represent the "no descriptor for declaration" case

compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/LazyDeclarationResolver.java

@@ -220,8 +220,7 @@ public class LazyDeclarationResolver {
             }
         }, null);
         if (result == null) {
-            throw new IllegalStateException("No descriptor resolved for " + declaration + ":\n" +
-                                            PsiUtilPackage.getElementTextWithContext(declaration));
+            throw new NoDescriptorForDeclarationException(declaration);
         }
         return result;
     }

compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/NoDescriptorForDeclarationException.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010-2015 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.resolve.lazy
+
+import org.jetbrains.kotlin.psi.JetDeclaration
+import org.jetbrains.kotlin.psi.psiUtil.getElementTextWithContext
+
+class NoDescriptorForDeclarationException(declaration: JetDeclaration) :
+        IllegalStateException("Descriptor wasn't found for declaration $declaration\n${declaration.getElementTextWithContext()}")

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/IDELightClassGenerationSupport.java

@@ -54,10 +54,7 @@ import org.jetbrains.kotlin.name.Name;
 import org.jetbrains.kotlin.psi.*;
 import org.jetbrains.kotlin.psi.psiUtil.PsiUtilPackage;
 import org.jetbrains.kotlin.resolve.BindingContext;
-import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode;
-import org.jetbrains.kotlin.resolve.lazy.ForceResolveUtil;
-import org.jetbrains.kotlin.resolve.lazy.KotlinCodeAnalyzer;
-import org.jetbrains.kotlin.resolve.lazy.ResolveSession;
+import org.jetbrains.kotlin.resolve.lazy.*;
 import org.jetbrains.kotlin.resolve.scopes.JetScope;
 
 import java.io.IOException;
@@ -310,7 +307,7 @@ public class IDELightClassGenerationSupport extends LightClassGenerationSupport
         try {
             return (ClassDescriptor) ResolvePackage.resolveToDescriptor(classOrObject);
         }
-        catch (IllegalStateException e) {
+        catch (NoDescriptorForDeclarationException e) {
             return null;
         }
     }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/project/IdeaLocalDescriptorResolver.kt

@@ -18,20 +18,17 @@ package org.jetbrains.kotlin.idea.project
 
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.psi.JetDeclaration
-import org.jetbrains.kotlin.psi.psiUtil.getElementTextWithContext
 import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.resolve.BindingContextUtils
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 import org.jetbrains.kotlin.resolve.lazy.LocalDescriptorResolver
+import org.jetbrains.kotlin.resolve.lazy.NoDescriptorForDeclarationException
 
 public class IdeaLocalDescriptorResolver(
         private val resolveElementCache: ResolveElementCache
 ): LocalDescriptorResolver {
     override fun resolveLocalDeclaration(declaration: JetDeclaration): DeclarationDescriptor {
         val context = resolveElementCache.resolveToElement(declaration, BodyResolveMode.FULL)
-        return BindingContextUtils.getNotNull(
-                context, BindingContext.DECLARATION_TO_DESCRIPTOR, declaration,
-                "Descriptor wasn't found for declaration $declaration\n${declaration.getElementTextWithContext()}"
-        )
+        return context.get(BindingContext.DECLARATION_TO_DESCRIPTOR, declaration)
+            ?: throw NoDescriptorForDeclarationException(declaration)
     }
 }