implements java/lang/reflect/Array.newInstance

src/de/inetsoftware/jwebassembly/module/nativecode/ReplacementForArray.java

@@ -129,4 +129,38 @@ public class ReplacementForArray {
                     + "array.len [S " //
                     + "return " )
     private static native int getLengthOfShorts( Object obj );
+
+    /**
+     * Replacement of the native Java methods Array.newInstance(c,l)
+     * 
+     * @param obj
+     *            the object
+     * @return the length of the object
+     */
+    @Replace( "java/lang/reflect/Array.newInstance(Ljava/lang/Class;I)Ljava/lang/Object;" )
+    private static Object array_newInstance( ReplacementForClass componentClass, int length ) {
+        int vtable = componentClass.vtable;
+        int componentType = getIntFromMemory( vtable + TYPE_DESCRIPTION_INSTANCEOF_OFFSET );
+        switch( componentType ) {
+            case BOOLEAN:
+                return new boolean[length];
+            case BYTE:
+                return new byte[length];
+            case CHAR:
+                return new char[length];
+            case DOUBLE:
+                return new double[length];
+            case FLOAT:
+                return new float[length];
+            case INT:
+                return new int[length];
+            case LONG:
+                return new long[length];
+            case SHORT:
+                return new short[length];
+            default:
+                //TODO it should return the right component array
+                return new Object[length];
+        }
+    }
 }

src/de/inetsoftware/jwebassembly/module/nativecode/ReplacementForClass.java

@@ -41,7 +41,10 @@ import de.inetsoftware.jwebassembly.module.TypeManager;
 @Replace( "java/lang/Class" )
 class ReplacementForClass {
 
-    private final int vtable;
+    /**
+     * The pointer in the memory for the class/type description.
+     */
+    final int vtable;
 
     /**
      * Create a instance

test/de/inetsoftware/jwebassembly/runtime/ArrayOperations.java

@@ -15,6 +15,7 @@
  */
 package de.inetsoftware.jwebassembly.runtime;
 
+import java.lang.reflect.Array;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -81,6 +82,7 @@ public class ArrayOperations extends AbstractBaseTest {
             addParam( list, script, "doubleArrayComponentTypeClassName" );
             addParam( list, script, "booleanArrayComponentTypeClassName" );
             addParam( list, script, "objectArrayComponentTypeClassName" );
+            addParam( list, script, "arrayNewInstance_getLength" );
         }
         rule.setTestParameters( list );
         return list;
@@ -318,5 +320,11 @@ public class ArrayOperations extends AbstractBaseTest {
         static String objectArrayComponentTypeClassName() {
             return JSObject.domString( new Object[0].getClass().getComponentType().getName() );
         }
+
+        @Export
+        static int arrayNewInstance_getLength() {
+            Object obj = Array.newInstance( byte.class, 42 );
+            return Array.getLength( obj );
+        }
     }
 }