org.teavm.jso

Interface JSObject

public interface JSObject

The base type for all overlay types. Overlay types are Java types that represent JavaScript object, and therefore can be passed to and from JavaScript code.

An overlay type is an abstract class or an interface that extends/implements JSObject. An overlay type has following restrictions:

• it must not contain any member fields, however static fields are allowed;
• its non-abstract methods must not override methods of a parent type.

To simplify creation of overlay objects, you can use shortcut annotations instead of JSBody: JSMethod, JSProperty and JSIndexer.

Example:

 public abstract class Int32Array implements JSObject {
      @JSBody(params = {}, script = "return this.length;")
     public native int getLength();

      @JSIndexer
     public abstract int get(int index);

      @JSIndexer
     public abstract void set(int index, int value);

      @JSBody(params = "length", script = "return new Int32Array(length);")
     public static native ArrayBuffer create(int length);

      @JSBody(params = "buffer", script = "return new Int32Array(buffer);")
     public static native ArrayBuffer create(ArrayBuffer buffer);

      @JSBody(params = { "buffer", "offset", "length" },
             script = "return new Int32Array(buffer, offset, length);")
     public static native ArrayBuffer create(ArrayBuffer buffer, int offset, int length);
 }
 

Author:

Alexey Andreev

See Also:

JSBody

Method Summary

Modifier and Type	Method and Description
default <T extends JSObject> T	cast()

Method Detail

cast

default <T extends JSObject> T cast()