org.gwtopenmaps.openlayers.client.util
Class JSObjectHelper

java.lang.Object
  org.gwtopenmaps.openlayers.client.util.JSObjectHelper

public class JSObjectHelper
extends Object

Static methods for working with JSObject objects.

The getProperty/setProperty methods are convenience methods for reducing the amount of JSNI code that is necessary for creating JSObject wrappers. Be aware: getProperty methods can die horribly at runtime if property does not exist.

ECMA-262 (Ecmascript = Javascript) defines an object as an unordered collection of properties each of which contains a primitive value, object, or function.

Author:

Edwin Commandeur - Atlis EJS, Alexander Solovets

Constructor Summary

JSObjectHelper()

Method Summary

static JSObject	createArray()
static JSObject	createFunction()
static JSObject	createObject()
static JSObject	ensureOpaqueArray(JSObject object) Utility method for creating arguments to functions that take an array of objects.
static JSObject	getProperty(JSObject object, String name)
static boolean	getPropertyAsBoolean(JSObject object, String name)
static com.google.gwt.user.client.Element	getPropertyAsDomElement(JSObject object, String name)
static double	getPropertyAsDouble(JSObject object, String name)
static float	getPropertyAsFloat(JSObject object, String name)
static int	getPropertyAsInt(JSObject object, String name)
static String	getPropertyAsString(JSObject object, String name)
static String	getPropertyNames(JSObject object)
static boolean	hasProperty(JSObject object, String name)
static void	setProperty(JSObject object, String name, boolean value)
static void	setProperty(JSObject object, String name, double value)
static void	setProperty(JSObject object, String name, com.google.gwt.user.client.Element value)
static void	setProperty(JSObject object, String name, float value)
static void	setProperty(JSObject object, String name, int value)
static void	setProperty(JSObject object, String name, JSObject value)
static void	setProperty(JSObject object, String name, String value)
static void	unsetProperty(JSObject object, String name) Unset/Clear the property with the given name.

Methods inherited from class java.lang.Object

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

Constructor Detail

JSObjectHelper

public JSObjectHelper()

Method Detail

createObject

public static JSObject createObject()

createFunction

public static JSObject createFunction()

createArray

public static JSObject createArray()

setProperty

public static void setProperty(JSObject object,
                               String name,
                               int value)

getPropertyAsInt

public static int getPropertyAsInt(JSObject object,
                                   String name)

setProperty

public static void setProperty(JSObject object,
                               String name,
                               String value)

getPropertyAsString

public static String getPropertyAsString(JSObject object,
                                         String name)

setProperty

public static void setProperty(JSObject object,
                               String name,
                               boolean value)

getPropertyAsBoolean

public static boolean getPropertyAsBoolean(JSObject object,
                                           String name)

setProperty

public static void setProperty(JSObject object,
                               String name,
                               float value)

getPropertyAsFloat

public static float getPropertyAsFloat(JSObject object,
                                       String name)

setProperty

public static void setProperty(JSObject object,
                               String name,
                               double value)

getPropertyAsDouble

public static double getPropertyAsDouble(JSObject object,
                                         String name)

setProperty

public static void setProperty(JSObject object,
                               String name,
                               JSObject value)

getProperty

public static JSObject getProperty(JSObject object,
                                   String name)

setProperty

public static void setProperty(JSObject object,
                               String name,
                               com.google.gwt.user.client.Element value)

getPropertyAsDomElement

public static com.google.gwt.user.client.Element getPropertyAsDomElement(JSObject object,
                                                                         String name)

getPropertyNames

public static String getPropertyNames(JSObject object)

hasProperty

public static boolean hasProperty(JSObject object,
                                  String name)

unsetProperty

public static void unsetProperty(JSObject object,
                                 String name)

Unset/Clear the property with the given name. Uses the javascript operator delete

Parameters:

object - The object in which the property exists

name - The name of the property

ensureOpaqueArray

public static JSObject ensureOpaqueArray(JSObject object)

Utility method for creating arguments to functions that take an array of objects.

Parameters:

object - - an opaque handle on a JavaScript object

Returns:

object - an opaque handle on a JavaScript object that is surely an Array