WebJavaPlugIn Protocol Reference

(informal protocol)

Framework	/System/Library/Frameworks/WebKit.framework
Availability	Available in Mac OS X v10.3.9 and later.
Companion guide	WebKit Objective-C Programming Guide
Declared in	WebJavaPlugIn.h

Overview

The WebJavaPlugIn protocol provides methods to facilitate JNI access to the Java virtual machine via the plug-in.

Tasks

Getting and Setting Java Applets

Instance Methods

webPlugInCallJava:isStatic:returnType:method:arguments:callingURL:exceptionDescription:

Sends a message directly to a Java object in a plug-in.

- (jvalue)webPlugInCallJava:(jobject)objectisStatic:(BOOL)isStaticreturnType:(WebJNIReturnType)returnTypemethod:(jmethodID)methodarguments:(jvalue *)argscallingURL:(NSURL *)urlexceptionDescription:(NSString **)exceptionString

Parameters

object: The Java instance receiving the message.
isStatic: If YES, method is expected to be a class method.
returnType: The return type of the Java method.
method: The Java method being called.
args: The arguments for the method specified by method.
url: The URL for the page that contains the JavaScript that is interacting with Java.
exceptionString: A string for describing any exceptions thrown by Java. Pass nil if you do not want an exception description.

Return Value

The return value of the Java method.

Discussion

This method is preferred over using JNI to send messages to Java applets, and is required to guarantee the correct thread will receive the message. Always invoke this method from within the main thread.

Availability

Available in Mac OS X v10.3.9 and later.

Declared In

WebJavaPlugIn.h

webPlugInGetApplet

Returns a jobject that represents a Java applet in a WebPlugInContainer.

- (jobject)webPlugInGetApplet

Return Value

A jobject that represents the applet.

Discussion

Always invoke this method from within the main thread.

Availability

Available in Mac OS X v10.3.9 and later.

Declared In

WebJavaPlugIn.h

Constants

WebJNIReturnType

The return type of the Java method.

typedef enum {     WebJNIReturnTypeInvalid = 0,
   WebJNIReturnTypeVoid,
   WebJNIReturnTypeObject,
   WebJNIReturnTypeBoolean,
   WebJNIReturnTypeByte,
   WebJNIReturnTypeChar,
   WebJNIReturnTypeShort,
   WebJNIReturnTypeInt,
   WebJNIReturnTypeLong,
   WebJNIReturnTypeFloat,
   WebJNIReturnTypeDouble } WebJNIReturnType;