references in domain classes from belongsTo, hasMany

plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/impl/statements/arguments/GrArgumentLabelImpl.java

@@ -19,6 +19,8 @@ package org.jetbrains.plugins.groovy.lang.psi.impl.statements.arguments;
 import com.intellij.lang.ASTNode;
 import com.intellij.openapi.util.TextRange;
 import com.intellij.psi.*;
+import com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistry;
+import com.intellij.psi.impl.source.resolve.reference.impl.PsiMultiReference;
 import com.intellij.psi.util.PropertyUtil;
 import com.intellij.util.ArrayUtil;
 import com.intellij.util.IncorrectOperationException;
@@ -55,7 +57,9 @@ public class GrArgumentLabelImpl extends GroovyPsiElementImpl implements GrArgum
   }
 
   public PsiReference getReference() {
-    return this;
+    PsiReference[] otherReferences = ReferenceProvidersRegistry.getReferencesFromProviders(this, GrArgumentLabel.class);
+    PsiReference[] thisReference = {this};
+    return new PsiMultiReference(otherReferences.length == 0 ? thisReference : ArrayUtil.mergeArrays(thisReference, otherReferences, PsiReference.class), this);
   }
 
   public String getName() {
@@ -166,6 +170,7 @@ public class GrArgumentLabelImpl extends GroovyPsiElementImpl implements GrArgum
 
   }
 
+  @NotNull
   public Object[] getVariants() {
     return ArrayUtil.EMPTY_OBJECT_ARRAY;
   }

plugins/groovy/test/org/jetbrains/plugins/groovy/lang/resolve/GroovyResolveTestCase.java

@@ -21,9 +21,11 @@ import com.intellij.openapi.vfs.VfsUtil;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiReference;
 import org.jetbrains.annotations.NonNls;
+import org.jetbrains.annotations.Nullable;
 import org.jetbrains.plugins.groovy.LightGroovyTestCase;
 
 import java.io.File;
+import java.io.IOException;
 
 /**
  * @author ven
@@ -39,7 +41,7 @@ public abstract class GroovyResolveTestCase extends LightGroovyTestCase {
     }
   }
 
-  protected PsiReference configureByFile(@NonNls String filePath) throws Exception{
+  protected PsiReference configureByFile(@NonNls String filePath, @Nullable String newFilePath) throws IOException {
     filePath = StringUtil.trimStart(filePath, getTestName(true) + "/");
     final VirtualFile vFile = myFixture.getTempDirFixture().getFile(filePath);
     assertNotNull("file " + filePath + " not found", vFile);
@@ -50,11 +52,20 @@ public abstract class GroovyResolveTestCase extends LightGroovyTestCase {
     assertTrue(offset >= 0);
     fileText = fileText.substring(0, offset) + fileText.substring(offset + MARKER.length());
 
-    myFixture.configureByText(vFile.getFileType(), fileText);
+    if (newFilePath == null) {
+      myFixture.configureByText(vFile.getName(), fileText);
+    }
+    else {
+      myFixture.configureByText(newFilePath, fileText);
+    }
 
     PsiReference ref = myFixture.getFile().findReferenceAt(offset);
     assertNotNull(ref);
     return ref;
   }
 
+  protected PsiReference configureByFile(@NonNls String filePath) throws Exception {
+    return configureByFile(filePath, null);
+  }
+
 }

plugins/groovy/testdata/highlighting/UsedLabel.groovy

@@ -2,7 +2,7 @@ oo:
 for (s in ['a', 'b']) {
   oo1:
   for (s1 in ['a', 'b']) {
-    <error descr="Label 'oo' is already in use">oo</error>:
+    <warning descr="Label 'oo' is already in use">oo</warning>:
     for (s2 in ['a', 'b']) {
     }
   }