static modifier supported for class members

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

@@ -268,6 +268,7 @@ public class Converter {
     HashSet<String> modifiersSet = new HashSet<String>();
     if (modifierList != null) {
       if (modifierList.hasModifierProperty(PsiModifier.FINAL)) modifiersSet.add(Modifier.FINAL);
+      if (modifierList.hasModifierProperty(PsiModifier.STATIC)) modifiersSet.add(Modifier.STATIC);
       if (modifierList.hasModifierProperty(PsiModifier.PUBLIC)) modifiersSet.add(Modifier.PUBLIC);
       if (modifierList.hasModifierProperty(PsiModifier.PROTECTED)) modifiersSet.add(Modifier.PROTECTED);
       if (modifierList.hasModifierProperty(PsiModifier.PACKAGE_LOCAL)) modifiersSet.add(Modifier.INTERNAL);

src/org/jetbrains/jet/j2k/ast/Class.java

@@ -10,10 +10,9 @@ import java.util.Set;
 /**
  * @author ignatov
  */
-public class Class extends Node {
+public class Class extends Member {
   String TYPE = "class";
   final Identifier myName;
-  private Set<String> myModifiers;
   private final List<Element> myTypeParameters;
   private final List<Type> myExtendsTypes;
   private final List<Type> myImplementsTypes;
@@ -74,13 +73,6 @@ public class Class extends Node {
     return allTypes.size() == 0 ? EMPTY : SPACE + COLON + SPACE + AstUtil.joinNodes(allTypes, COMMA_WITH_SPACE);
   }
 
-  private String accessModifier() {
-    for (String m : myModifiers)
-      if (m.equals(Modifier.PUBLIC) || m.equals(Modifier.PROTECTED) || m.equals(Modifier.PRIVATE))
-        return m;
-    return EMPTY; // package local converted to internal, but we use internal by default
-  }
-
   String modifiersToKotlin() {
     List<String> modifierList = new LinkedList<String>();
 
@@ -96,9 +88,45 @@ public class Class extends Node {
   }
 
   boolean needOpenModifier() {
-    return getKind() != Kind.TRAIT && !myModifiers.contains(Modifier.FINAL);
+    return !myModifiers.contains(Modifier.FINAL);
   }
 
+  String bodyToKotlin() {
+    return classObjectToKotlin() + N +
+      AstUtil.joinNodes(getNonStatic(myFields), N) + N +
+      AstUtil.joinNodes(getNonStatic(methodsExceptConstructors()), N) + N +
+      AstUtil.joinNodes(getNonStatic(myInnerClasses), N) + N;
+  }
+
+  private List<Member> getStatic(List<? extends Member> members) {
+    List<Member> result = new LinkedList<Member>();
+    for (Member m : members)
+      if (m.isStatic())
+        result.add(m);
+    return result;
+  }
+
+  private List<Member> getNonStatic(List<? extends Member> members) {
+    List<Member> result = new LinkedList<Member>();
+    for (Member m : members)
+      if (!m.isStatic())
+        result.add(m);
+    return result;
+  }
+
+  private String classObjectToKotlin() {
+    final List<Member> staticFields = getStatic(myFields);
+    final List<Member> staticMethods = getStatic(methodsExceptConstructors());
+    final List<Member> staticInnerClasses = getStatic(myInnerClasses);
+    if (staticFields.size() + staticMethods.size() + staticInnerClasses.size() > 0) {
+      return "class" + SPACE + "object" + SPACE + "{" + N +
+        AstUtil.joinNodes(staticFields, N) + N +
+        AstUtil.joinNodes(staticMethods, N) + N +
+        AstUtil.joinNodes(staticInnerClasses, N) + N +
+        "}";
+    }
+    return EMPTY;
+  }
 
   @NotNull
   @Override
@@ -107,9 +135,7 @@ public class Class extends Node {
       implementTypesToKotlin() +
       typeParameterWhereToKotlin() +
       SPACE + "{" + N +
-      AstUtil.joinNodes(myFields, N) + N +
-      AstUtil.joinNodes(methodsExceptConstructors(), N) + N +
-      AstUtil.joinNodes(myInnerClasses, N) + N +
+      bodyToKotlin() +
       "}";
   }
 }

src/org/jetbrains/jet/j2k/ast/Field.java

@@ -10,9 +10,8 @@ import java.util.Set;
 /**
  * @author ignatov
  */
-public class Field extends Node {
+public class Field extends Member {
   final Identifier myIdentifier;
-  private Set<String> myModifiers;
   private final Type myType;
   final Element myInitializer;
 
@@ -23,13 +22,6 @@ public class Field extends Node {
     myInitializer = initializer;
   }
 
-  private String accessModifier() {
-    for (String m : myModifiers)
-      if (m.equals(Modifier.PUBLIC) || m.equals(Modifier.PROTECTED) || m.equals(Modifier.PRIVATE))
-        return m;
-    return EMPTY; // package local converted to internal, but we use internal by default
-  }
-
   String modifiersToKotlin() {
     List<String> modifierList = new LinkedList<String>();
 
@@ -43,6 +35,11 @@ public class Field extends Node {
     return EMPTY;
   }
 
+  @Override
+  public boolean isStatic() {
+    return myModifiers.contains(Modifier.STATIC);
+  }
+
   @NotNull
   @Override
   public String toKotlin() {

src/org/jetbrains/jet/j2k/ast/Function.java

@@ -10,9 +10,8 @@ import java.util.Set;
 /**
  * @author ignatov
  */
-public class Function extends Node {
+public class Function extends Member {
   private final Identifier myName;
-  private Set<String> myModifiers;
   private final Type myType;
   private final List<Element> myTypeParameters;
   final Element myParams;
@@ -38,13 +37,6 @@ public class Function extends Node {
     return false;
   }
 
-  private String accessModifier() {
-    for (String m : myModifiers)
-      if (m.equals(Modifier.PUBLIC) || m.equals(Modifier.PROTECTED) || m.equals(Modifier.PRIVATE))
-        return m;
-    return EMPTY; // package local converted to internal, but we use internal by default
-  }
-
   private String typeParameterWhereToKotlin() {
     if (hasWhere()) {
       List<String> wheres = new LinkedList<String>();

src/org/jetbrains/jet/j2k/ast/IMember.java

@@ -0,0 +1,8 @@
+package org.jetbrains.jet.j2k.ast;
+
+/**
+ * @author ignatov
+ */
+public interface IMember extends INode {
+  public boolean isStatic();
+}

src/org/jetbrains/jet/j2k/ast/Member.java

@@ -0,0 +1,22 @@
+package org.jetbrains.jet.j2k.ast;
+
+import java.util.Set;
+
+/**
+ * @author ignatov
+ */
+public abstract class Member extends Node implements IMember {
+  protected Set<String> myModifiers;
+
+  protected String accessModifier() {
+    for (String m : myModifiers)
+      if (m.equals(Modifier.PUBLIC) || m.equals(Modifier.PROTECTED) || m.equals(Modifier.PRIVATE))
+        return m;
+    return EMPTY; // package local converted to internal, but we use internal by default
+  }
+
+  @Override
+  public boolean isStatic() {
+    return myModifiers.contains(Modifier.STATIC);
+  }
+}

src/org/jetbrains/jet/j2k/ast/Trait.java

@@ -1,6 +1,7 @@
 package org.jetbrains.jet.j2k.ast;
 
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.jet.j2k.util.AstUtil;
 
 import java.util.List;
 import java.util.Set;
@@ -14,6 +15,16 @@ public class Trait extends Class {
     TYPE = "trait";
   }
 
+  boolean needOpenModifier() {
+    return false;
+  }
+
+  String bodyToKotlin() {
+    return AstUtil.joinNodes(myFields, N) + N +
+      AstUtil.joinNodes(methodsExceptConstructors(), N) + N +
+      AstUtil.joinNodes(myInnerClasses, N) + N;
+  }
+
   @NotNull
   @Override
   public Kind getKind() {

test/org/jetbrains/jet/j2k/ast/ClassTest.java

@@ -114,4 +114,32 @@ public class ClassTest extends JetTestCaseBase {
   public void testInternalClass() throws Exception {
     Assert.assertEquals(classToSingleLineKotlin("class Test {}"), "open class Test { }");
   }
+
+  public void testOneStaticMethod() throws Exception {
+    Assert.assertEquals(
+      classToSingleLineKotlin("final class S { static boolean staticF() { return true; } }"),
+      "class S { class object { fun staticF() : Boolean { return true } } }"
+    );
+  }
+
+  public void testTwoStaticMethod() throws Exception {
+    Assert.assertEquals(
+      classToSingleLineKotlin("final class S { static boolean sB() { return true; } static int sI() { return 1; } }"),
+      "class S { class object { fun sB() : Boolean { return true } fun sI() : Int { return 1 } } }"
+    );
+  }
+
+  public void testOneStaticMethodOneNonStatic() throws Exception {
+    Assert.assertEquals(
+      classToSingleLineKotlin("final class S { boolean sB() { return true; } static int sI() { return 1; } }"),
+      "class S { class object { fun sI() : Int { return 1 } } fun sB() : Boolean { return true } }"
+    );
+  }
+
+  public void testOneStaticFieldOneNonStatic() throws Exception {
+    Assert.assertEquals(
+      classToSingleLineKotlin("final class S { boolean sB() { return true; } static int myI = 10; }"),
+      "class S { class object { var myI : Int = 10 } fun sB() : Boolean { return true } }"
+    );
+  }
 }

test/org/jetbrains/jet/j2k/ast/TraitTest.java

@@ -72,4 +72,20 @@ public class TraitTest extends JetTestCaseBase {
   public void testInternalInterface() throws Exception {
     Assert.assertEquals(classToSingleLineKotlin("interface Test {}"), "trait Test { }");
   }
+
+  public void testInterfaceWithStaticFields() throws Exception {
+    Assert.assertEquals(classToKotlin(
+      "public interface INode {" +
+        "  public static final String IN = \"in\";" +
+        "  public static final String AT = \"@\";" +
+        "  public static final String COMMA_WITH_SPACE = COMMA + SPACE;" +
+        "}"
+    ),
+      "public trait INode {\n" +
+        "public val IN : String? = \"in\"\n" +
+        "public val AT : String? = \"@\"\n" +
+        "public val COMMA_WITH_SPACE : String? = (COMMA + SPACE)\n" +
+        "}"
+    );
+  }
 }