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public abstract class JSObject
extends java.lang.Object
Allows Java code to manipulate JavaScript objects.
When a JavaScript object is passed or returned to Java code, it
is wrapped in an instance of JSObject
. When a
JSObject
instance is passed to the JavaScript engine,
it is unwrapped back to its original JavaScript object. The
JSObject
class provides a way to invoke JavaScript
methods and examine JavaScript properties.
Any data returned from the JavaScript engine to Java is
converted to Java data types. Certain data passed to the JavaScript
engine is converted to JavaScript data types. See the section on
Modifier | Constructor and Description |
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protected |
JSObject()
Constructs a new JSObject.
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Modifier and Type | Method and Description |
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abstract java.lang.Object |
call(java.lang.String methodName,
java.lang.Object... args)
Calls a JavaScript method.
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abstract java.lang.Object |
eval(java.lang.String s)
Evaluates a JavaScript expression.
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abstract java.lang.Object |
getMember(java.lang.String name)
Retrieves a named member of a JavaScript object.
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abstract java.lang.Object |
getSlot(int index)
Retrieves an indexed member of a JavaScript object.
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abstract void |
removeMember(java.lang.String name)
Removes a named member of a JavaScript object.
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abstract void |
setMember(java.lang.String name,
java.lang.Object value)
Sets a named member of a JavaScript object.
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abstract void |
setSlot(int index,
java.lang.Object value)
Sets an indexed member of a JavaScript object.
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protected JSObject()
public abstract java.lang.Object call(java.lang.String methodName, java.lang.Object... args) throws JSException
Calls a JavaScript method. Equivalent to "this.methodName(args[0], args[1], ...)" in JavaScript.
methodName
- The name of the JavaScript method to be invoked.args
- An array of Java object to be passed as arguments to the method.JSException
public abstract java.lang.Object eval(java.lang.String s) throws JSException
Evaluates a JavaScript expression. The expression is a string of JavaScript source code which will be evaluated in the context given by "this".
s
- The JavaScript expression.JSException
public abstract java.lang.Object getMember(java.lang.String name) throws JSException
Retrieves a named member of a JavaScript object. Equivalent to "this.name" in JavaScript.
name
- The name of the JavaScript property to be accessed.JSException
public abstract void setMember(java.lang.String name, java.lang.Object value) throws JSException
Sets a named member of a JavaScript object. Equivalent to "this.name = value" in JavaScript.
name
- The name of the JavaScript property to be accessed.value
- The value of the propery.JSException
public abstract void removeMember(java.lang.String name) throws JSException
Removes a named member of a JavaScript object. Equivalent to "delete this.name" in JavaScript.
name
- The name of the JavaScript property to be removed.JSException
public abstract java.lang.Object getSlot(int index) throws JSException
Retrieves an indexed member of a JavaScript object. Equivalent to "this[index]" in JavaScript.
index
- The index of the array to be accessed.JSException
public abstract void setSlot(int index, java.lang.Object value) throws JSException
Sets an indexed member of a JavaScript object. Equivalent to "this[index] = value" in JavaScript.
index
- The index of the array to be accessed.JSException
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