com.google.gwt.core.ext.debug
Class JsoEval

java.lang.Object
  com.google.gwt.core.ext.debug.JsoEval

public class JsoEval
extends java.lang.Object

Provides facilities for debuggers to call methods on JavaScriptObjects.

Because devmode does extensive rewriting of JSO bytecode, debuggers can't figure out how to evaluate JSO method calls. This class can be used directly by users to evaluate JSO methods in their debuggers. Additionally, debuggers with GWT support use this class to transparently evaluate JSO expressions in breakpoints, watch windows, etc.

Example uses:

   JsoEval.call(Element.class, myElement, "getAbsoluteTop");
   JsoEval.call(Node.class, myNode, "cloneNode", Boolean.TRUE);
   JsoEval.call(Element.class, element.getFirstChildElement(), "setPropertyString", "phase",
     "gamma");
 

call

public static java.lang.Object call(java.lang.Class klass,
                                    java.lang.Object obj,
                                    java.lang.String methodName,
                                    java.lang.Class[] types,
                                    java.lang.Object... args)

Reflectively invokes a method on a JavaScriptObject.

Parameters:

klass - Either a class of type JavaScriptObject or an interface implemented by a JavaScriptObject. The class must contain the method to be invoked.

obj - The JavaScriptObject to invoke the method on. Must be null if the method is static. Must be not-null if the method is not static

methodName - The name of the method

types - The types of the arguments

args - The values of the arguments

Returns:

The result of the method invocation or the failure as a String

call

public static java.lang.Object call(java.lang.Class klass,
                                    java.lang.Object obj,
                                    java.lang.String methodName,
                                    java.lang.Object... args)

A convenience form of call(Class, Object, String, Class[], Object...) for use directly by users in a debugger. This method guesses at the types of the method based on the values of args.

Returns:

The result of the method invocation or the failure as a String

callEx

public static java.lang.Object callEx(java.lang.Class klass,
                                      java.lang.Object obj,
                                      java.lang.String methodName,
                                      java.lang.Class[] types,
                                      java.lang.Object... args)
                               throws java.lang.ClassNotFoundException,
                                      java.lang.NoSuchMethodException,
                                      java.lang.reflect.InvocationTargetException,
                                      java.lang.IllegalAccessException

Reflectively invokes a method on a JavaScriptObject.

Parameters:

klass - Either a class of type JavaScriptObject or an interface implemented by a JavaScriptObject. The class must contain the method to be invoked.

obj - The JavaScriptObject to invoke the method on. Must be null if the method is static. Must be not-null if the method is not static

methodName - The name of the method

types - The types of the arguments

args - The values of the arguments

Returns:

The result of the method invocation

Throws:

java.lang.ClassNotFoundException

java.lang.NoSuchMethodException

java.lang.reflect.InvocationTargetException

java.lang.IllegalAccessException

callEx

public static java.lang.Object callEx(java.lang.Class klass,
                                      java.lang.Object obj,
                                      java.lang.String methodName,
                                      java.lang.Object... args)
                               throws java.lang.ClassNotFoundException,
                                      java.lang.NoSuchMethodException,
                                      java.lang.reflect.InvocationTargetException,
                                      java.lang.IllegalAccessException

A convenience form of call(Class, Object, String, Class[], Object...) for use directly by users in a debugger. This method guesses at the types of the method based on the values of args.

Throws:

java.lang.ClassNotFoundException

java.lang.NoSuchMethodException

java.lang.reflect.InvocationTargetException

java.lang.IllegalAccessException

callStatic

public static java.lang.Object callStatic(java.lang.Class klass,
                                          java.lang.String methodName,
                                          java.lang.Class[] types,
                                          java.lang.Object... args)

Reflectively invokes a static method on a JavaScriptObject. Has the same effect as calling call(klass, null, methodName, types, args)

Returns:

The result of the method invocation or the failure as a String

callStaticEx

public static java.lang.Object callStaticEx(java.lang.Class klass,
                                            java.lang.String methodName,
                                            java.lang.Class[] types,
                                            java.lang.Object... args)
                                     throws java.lang.ClassNotFoundException,
                                            java.lang.NoSuchMethodException,
                                            java.lang.reflect.InvocationTargetException,
                                            java.lang.IllegalAccessException

Reflectively invokes a static method on a JavaScriptObject. Has the same effect as calling call(klass, null, methodName, types, args)

Throws:

java.lang.ClassNotFoundException

java.lang.NoSuchMethodException

java.lang.reflect.InvocationTargetException

java.lang.IllegalAccessException