Adds some more support of reflection

teavm-classlib/src/main/java/org/teavm/classlib/java/lang/ClassNativeGenerator.java

@@ -19,6 +19,9 @@ public class ClassNativeGenerator implements Generator {
             case "isAssignable":
                 generateIsAssignableFrom(context, writer);
                 break;
+            case "getComponentType":
+                generateGetComponentType(context, writer);
+                break;
         }
     }
 
@@ -31,4 +34,10 @@ public class ClassNativeGenerator implements Generator {
         writer.append("return $rt_isAssignable(").append(context.getParameterName(1)).append(".$data, ")
                 .append(context.getParameterName(0)).append(".$data;").newLine();
     }
+
+    private void generateGetComponentType(GeneratorContext context, SourceWriter writer) {
+        String thisArg = context.getParameterName(0);
+        writer.append("var item = " + thisArg + ".$data.$meta.item;").newLine();
+        writer.append("return item != null ? $rt_cls(item) : null;").newLine();
+    }
 }

teavm-classlib/src/main/java/org/teavm/classlib/java/lang/ObjectNativeGenerator.java

@@ -57,17 +57,7 @@ public class ObjectNativeGenerator implements Generator, DependencyPlugin {
 
     private void generateGetClass(GeneratorContext context, SourceWriter writer) {
         String thisArg = context.getParameterName(0);
-        String classClass = "java.lang.Class";
+        writer.append("return $rt_cls(").append(thisArg).append(".$class);").newLine();
-        writer.append("var cls = ").append(thisArg).append(".$class.classObject;").newLine();
-        writer.append("if (cls === undefined) {").newLine().indent();
-        MethodReference createMethodRef = new MethodReference(classClass, new MethodDescriptor("createNew",
-                ValueType.object(classClass)));
-        writer.append("cls = ").appendClass(classClass).append('.').appendMethod(createMethodRef)
-                .append("();").newLine();
-        writer.append("cls.$data = ").append(thisArg).append(".$class;").newLine();
-        writer.append(thisArg).append(".$class.classObject = cls;").newLine();
-        writer.outdent().append("}").newLine();
-        writer.append("return cls;").newLine();
     }
 
     private void achieveGetClass(DependencyChecker checker) {

teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TClass.java

@@ -7,10 +7,39 @@ import org.teavm.javascript.ni.GeneratedBy;
  * @author Alexey Andreev <konsoletyper@gmail.com>
  */
 public class TClass<T> extends TObject {
+    String name;
+    boolean primitive;
+    boolean array;
+    private TClass<?> componentType;
+    private boolean componentTypeDirty = true;
+
     static TClass<?> createNew() {
         return new TClass<>();
     }
 
     @GeneratedBy(ClassNativeGenerator.class)
     public native boolean isInstance(TObject obj);
+
+    public String getName() {
+        return name;
+    }
+
+    public boolean isPrimitive() {
+        return primitive;
+    }
+
+    public boolean isArray() {
+        return array;
+    }
+
+    public TClass<?> getComponentType() {
+        if (componentTypeDirty) {
+            componentType = getComponentType0();
+            componentTypeDirty = false;
+        }
+        return componentType;
+    }
+
+    @GeneratedBy(ClassNativeGenerator.class)
+    private native TClass<?> getComponentType0();
 }

teavm-classlib/src/main/java/org/teavm/classlib/java/lang/TClassTests.java

@@ -0,0 +1,30 @@
+package org.teavm.classlib.java.lang;
+
+import static org.junit.Assert.*;
+import org.junit.Test;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+class TClassTests {
+    @Test
+    public void classNameEvaluated() {
+        assertEquals("java.lang.Object", Object.class.getName());
+    }
+
+    @Test
+    public void objectClassNameEvaluated() {
+        assertEquals("java.lang.Object", new Object().getClass().getName());
+    }
+
+    @Test
+    public void objectClassConsideredNotArray() {
+        assertFalse(Object.class.isArray());
+    }
+
+    @Test
+    public void arrayClassConsideredArray() {
+        assertFalse(Object[].class.isArray());
+    }
+}

teavm-classlib/src/main/java/org/teavm/classlibgen/ClasslibTestGenerator.java

@@ -32,7 +32,7 @@ public class ClasslibTestGenerator {
     private static List<MethodReference> testMethods = new ArrayList<>();
     private static Map<String, List<MethodReference>> groupedMethods = new HashMap<>();
     private static String[] testClasses = { "java.lang.ObjectTests", "java.lang.SystemTests",
-            "java.lang.StringBuilderTests" };
+            "java.lang.StringBuilderTests", "java.lang.ClassTests" };
 
     public static void main(String[] args) throws IOException {
         out = System.out;

teavm-core/src/main/java/org/teavm/javascript/Renderer.java

@@ -52,16 +52,28 @@ public class Renderer implements ExprVisitor, StatementVisitor {
     }
 
     private void renderRuntimeCls() {
-        writer.append("$rt_cls = function(cls) {").indent().newLine();
+        writer.append("$rt_cls = function(clsProto) {").indent().newLine();
         String classClass = "java.lang.Class";
-        writer.append("var cls = cls.classObject;").newLine();
+        writer.append("var cls = clsProto.classObject;").newLine();
         writer.append("if (cls === undefined) {").newLine().indent();
         MethodReference createMethodRef = new MethodReference(classClass, new MethodDescriptor("createNew",
                 ValueType.object(classClass)));
         writer.append("cls = ").appendClass(classClass).append('.').appendMethod(createMethodRef)
                 .append("();").newLine();
-        writer.append("cls.$data = cls;").newLine();
+        writer.append("cls.$data = clsProto;").newLine();
-        writer.append("cls.classObject = cls;").newLine();
+        if (classSource.getClassHolder(classClass).getField("name") != null) {
+            writer.append("cls.").appendField(new FieldReference(classClass, "name"))
+                    .append(" = clsProto.$meta.name !== undefined ? $rt_str(clsProto.$meta.name) : null;").newLine();
+        }
+        if (classSource.getClassHolder(classClass).getField("primitive") != null) {
+            writer.append("cls.").appendField(new FieldReference(classClass, "primitive"))
+                    .append(" = clsProto.$meta.primitive ? 1 : 0;").newLine();
+        }
+        if (classSource.getClassHolder(classClass).getField("array") != null) {
+            writer.append("cls.").appendField(new FieldReference(classClass, "array"))
+                    .append(" = clsProto.$meta.item ? 1 : 0;").newLine();
+        }
+        writer.append("clsProto.classObject = cls;").newLine();
         writer.outdent().append("}").newLine();
         writer.append("return cls;").newLine();
         writer.outdent().append("}").newLine();

teavm-core/src/main/resources/org/teavm/javascript/runtime.js

@@ -50,7 +50,7 @@ $rt_arraycls = function(cls) {
             this.$class = arraycls;
         };
         arraycls.prototype = new ($rt_objcls())();
-        arraycls.$meta = { item : cls, supertypes : [$rt_objcls()] };
+        arraycls.$meta = { item : cls, supertypes : [$rt_objcls()], primitive : false };
         cls.$array = arraycls;
     }
     return cls.$array;