io.webfolder.ducktape4j

Class Duktape

java.lang.Object

io.webfolder.ducktape4j.Duktape

All Implemented Interfaces:

Closeable, AutoCloseable

public final class Duktape
extends Object
implements Closeable

A simple EMCAScript (Javascript) interpreter.

Method Summary

Modifier and Type	Method and Description
void	close() Release the native resources associated with this object.
static Duktape	create() Create a new interpreter instance.
Object	evaluate(String script) Evaluate script and return a result.
Object	evaluate(String script, String fileName) Evaluate script and return a result.
protected void	finalize()
<T> T	get(String name, Class<T> type) Attaches to a global JavaScript object called name that implements type.
<T> void	set(String name, Class<T> type, T object) Provides object to JavaScript as a global object called name.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

create

public static Duktape create()

Create a new interpreter instance. Calls to this method must matched with calls to close() on the returned instance to avoid leaking native memory.

evaluate

public Object evaluate(String script,
                       String fileName)

Evaluate script and return a result. fileName will be used in error reporting. Note that the result must be one of the supported Java types or the call will return null.

Throws:

DuktapeException - if there is an error evaluating the script.

evaluate

public Object evaluate(String script)

Evaluate script and return a result. Note that the result must be one of the supported Java types or the call will return null.

Throws:

DuktapeException - if there is an error evaluating the script.

set

public <T> void set(String name,
                    Class<T> type,
                    T object)

Provides object to JavaScript as a global object called name. type defines the interface implemented by object that will be accessible to JavaScript. type must be an interface that does not extend any other interfaces, and cannot define any overloaded methods.

Methods of the interface may return void or any of the following supported argument types: boolean, Boolean, int, Integer, double, Double, String.

get

public <T> T get(String name,
                 Class<T> type)

Attaches to a global JavaScript object called name that implements type. type defines the interface implemented in JavaScript that will be accessible to Java. type must be an interface that does not extend any other interfaces, and cannot define any overloaded methods.

Methods of the interface may return void or any of the following supported argument types: boolean, Boolean, int, Integer, double, Double, String.

close

public void close()

Release the native resources associated with this object. You must call this method for each instance to avoid leaking native memory.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable