Package com.google.gwt.core.client

Class JavaScriptException

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.RuntimeException

com.google.gwt.core.client.impl.JavaScriptExceptionBase

com.google.gwt.core.client.JavaScriptException

All Implemented Interfaces:

Serializable

public final class JavaScriptException
extends com.google.gwt.core.client.impl.JavaScriptExceptionBase

Any JavaScript exceptions occurring within JSNI methods are wrapped as this class when caught in Java code. The wrapping does not occur until the exception passes out of JSNI into Java. Before that, the thrown object remains a native JavaScript exception object, and can be caught in JSNI as normal.

The return value of Throwable.getStackTrace() may vary between browsers due to variations in the underlying error-reporting capabilities. When possible, the stack trace will be the stack trace of the underlying error object. If it is not possible to accurately report a stack trace, a zero-length array will be returned. In those cases where the underlying stack trace cannot be determined, Throwable.fillInStackTrace() can be called in the associated catch block to create a stack trace corresponding to the location where the JavaScriptException object was created.

 try {
   nativeMethod();
 } catch (JavaScriptException e) {
   if (e.getStackTrace().length == 0) {
     e.fillInStackTrace();
   }
 }
 

See Also:

• Serialized Form

Constructor Summary

Constructors

Modifier	Constructor	Description
	JavaScriptException(Object e)
	JavaScriptException(Object e, String description)
protected	JavaScriptException(String message)	Used for testing instantiations.
	JavaScriptException(String name, String description)

Method Summary

Modifier and Type	Method	Description
String	getDescription()	Returns the original JavaScript message of the exception; may be null.
JavaScriptObject	getException()	Deprecated. deprecated in favor for getThrown() and isThrownSet()
String	getMessage()
String	getName()	Returns the original JavaScript type name of the exception; may be null.
Object	getThrown()	Returns the original thrown object from javascript; may be null.
boolean	isThrownSet()	Returns true if a thrown object is not set for the exception.

Methods inherited from class java.lang.Throwable

addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

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

Constructor Details

JavaScriptException

public JavaScriptException(Object e)

Parameters:

e - the object caught in JavaScript that triggered the exception

JavaScriptException

public JavaScriptException(Object e,
 String description)

Parameters:

e - the object caught in JavaScript that triggered the exception

description - to include in getMessage(), e.g. at the top of a stack trace

JavaScriptException

public JavaScriptException(String name,
 String description)

JavaScriptException

protected JavaScriptException(String message)

Used for testing instantiations.

Parameters:

message - the detail message

Method Details

isThrownSet

public boolean isThrownSet()

Returns true if a thrown object is not set for the exception.

getThrown

public Object getThrown()

Returns the original thrown object from javascript; may be null.

getDescription

public String getDescription()

Returns the original JavaScript message of the exception; may be null.

getException

@Deprecated
public JavaScriptObject getException()

Deprecated.

deprecated in favor for getThrown() and isThrownSet()

Returns the original JavaScript the exception; may be null.

getMessage

public String getMessage()

Overrides:

getMessage in class Throwable

getName

public String getName()

Returns the original JavaScript type name of the exception; may be null.