instanceof supported, is operator added

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

@@ -0,0 +1,22 @@
+package org.jetbrains.jet.j2k.ast;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author ignatov
+ */
+public class IsOperator extends Expression {
+  private Expression myExpression;
+  private Element myTypeElement;
+
+  public IsOperator(Expression expression, Element typeElement) {
+    myExpression = expression;
+    myTypeElement = typeElement;
+  }
+
+  @NotNull
+  @Override
+  public String toKotlin() {
+    return "(" + myExpression.toKotlin() + SPACE + "is" + SPACE + myTypeElement.toKotlin() + ")";
+  }
+}

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

@@ -0,0 +1,20 @@
+package org.jetbrains.jet.j2k.ast;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author ignatov
+ */
+public class TypeElement extends Element {
+  private Type myType;
+
+  public TypeElement(Type type) {
+    myType = type;
+  }
+
+  @NotNull
+  @Override
+  public String toKotlin() {
+    return myType.toKotlin();
+  }
+}

src/org/jetbrains/jet/j2k/visitors/ElementVisitor.java

@@ -46,6 +46,12 @@ public class ElementVisitor extends JavaElementVisitor implements Visitor {
     myResult = new IdentifierImpl(reference.getQualifiedName()); // TODO
   }
 
+  @Override
+  public void visitTypeElement(PsiTypeElement type) {
+    super.visitTypeElement(type);
+    myResult = new TypeElement(typeToType(type.getType()));
+  }
+
   @Override
   public void visitTypeParameter(PsiTypeParameter classParameter) {
     super.visitTypeParameter(classParameter);

src/org/jetbrains/jet/j2k/visitors/ExpressionVisitor.java

@@ -140,6 +140,9 @@ public class ExpressionVisitor extends StatementVisitor implements Visitor {
   @Override
   public void visitInstanceOfExpression(PsiInstanceOfExpression expression) {
     super.visitInstanceOfExpression(expression);
+    myResult = new IsOperator(
+      expressionToExpression(expression.getOperand()),
+      elementToElement(expression.getCheckType()));
   }
 
   @Override

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

@@ -0,0 +1,23 @@
+package org.jetbrains.jet.j2k.ast;
+
+import junit.framework.Assert;
+import org.jetbrains.jet.j2k.JetTestCaseBase;
+
+/**
+ * @author ignatov
+ */
+public class IsOperatorTest extends JetTestCaseBase {
+  public void testSimpleReference() throws Exception {
+    Assert.assertEquals(
+      expressionToKotlin("a instanceof String"),
+      "(a is String?)"
+    );
+  }
+
+  public void testComplicatedExpression() throws Exception {
+    Assert.assertEquals(
+      expressionToKotlin("c.getType().getName() instanceof String"),
+      "(c.getType().getName() is String?)"
+    );
+  }
+}