/core/src/java/com/objetdirect/tatami/client/JSHelper.java

package com.objetdirect.tatami.client;



import java.util.ArrayList;

import java.util.Collection;

import java.util.Date;

import java.util.Map;





import com.google.gwt.core.client.JavaScriptObject;

import com.objetdirect.tatami.client.data.Item;



public class JSHelper {

	 

 	/**

 	 * @param obj : Java Object to convert. It can be : 

 	 * 	- a Map 

 	 * 	- a String

 	 *  - a Number

 	 * 	- a Collection of any of the above , including a Collection of Collections

 	 *  

 	 * @return a JavaScripObject equivalent to the Java Object to convert

 	 * @throws NotJSONIzableObjectException

 	 */

 	

 	private native static JavaScriptObject convertMapToJSObject(Map<?, ?> map)/*-{

 		var obj = {};

 		var keys = map.@java.util.Map::keySet()();

 	 	var iterator = keys.@java.util.Set::iterator()();

 	 	while(iterator.@java.util.Iterator::hasNext()()){

 	 		var string = iterator.@java.util.Iterator::next()();

 	 		var value = map.@java.util.Map::get(Ljava/lang/Object;)(string);

 	 		var newvalue;

 	 		if(@com.objetdirect.tatami.client.JSHelper::isString(Ljava/lang/Object;)(value)){

 	 			newvalue = value;

 	 		}

 	 		else if(@com.objetdirect.tatami.client.JSHelper::isNumber(Ljava/lang/Object;)(value)){

 	 			newvalue = value.@java.lang.Number::doubleValue()();

 	 		}else if(@com.objetdirect.tatami.client.JSHelper::isDate(Ljava/lang/Object;)(value)){

 	 			newvalue = @com.objetdirect.tatami.client.DateUtil::getJSDate(Ljava/util/Date;)(value);

 	 		}else if(@com.objetdirect.tatami.client.JSHelper::isBoolean(Ljava/lang/Object;)(value)){

 	 			newvalue = value.@java.lang.Boolean::booleanValue()();

 	 		}else {

 	 			newvalue = @com.objetdirect.tatami.client.JSHelper::convertObjectToJSObject(Ljava/lang/Object;)(value);

 	 			newvalue = newvalue == null ? value : newvalue;

 	 		}

 	 		obj[string] = newvalue;

 	 	}

 	 	return obj; 

 	}-*/;

 	

 	public static boolean isString(Object object){

 		if(object instanceof String)

 			return true;

 		else

 			return false;

 	}

 	

 	public static boolean isNumber(Object object){

 		if(object instanceof Number)

 			return true;

 		else 

 			return false;

 	}

 	

 	public static boolean isDate(Object object){

 		if(object instanceof Date)

 			return true;

 		else 

 			return false;

 	}

	

 	public static boolean isBoolean(Object object){

 		if(object instanceof Boolean)

 			return true;

 		else 

 			return false;

 	}

 

	public static Collection<Object> convertJSArrayToCollection(JavaScriptObject array){

		Collection<Object> collec = new ArrayList<Object>();

		int length = getArraySize(array);

		for (int i = 0; i < length; i++) {

			collec.add(getElementAtIndex(array, i));

		}

		return collec;

	}

	

	public static native Object getElementAtIndex(JavaScriptObject array , int index)/*-{

		return array[index];

	}-*/;

	

	public static native Object getElementAtIndex(JavaScriptObject array , String index)/*-{

		return array[index];

	}-*/;

	

	public static Number getNumberElementAtIndex(JavaScriptObject array , String index){

		return (Number) jsGetNumberElementAtIndex(array, index);

	}

	

	private static native double jsGetNumberElementAtIndex(JavaScriptObject array , String index)/*-{

		return array[index];

	}-*/;

	

	public static native int getArraySize(JavaScriptObject array)/*-{

		return array ? array.length : 0;

	}-*/;

	

 	private  static JavaScriptObject convertArrayToJSObject(Object[] collec){

 		JavaScriptObject array = JavaScriptObject.createArray();

 		for (int i = 0; i < collec.length; i++) {

 			if(collec[i] instanceof String){

 				array = addStringToArray(array, i , (String) collec[i] );

 			}else if(collec[i] instanceof Number){

 				array = addNumberToArray(array, i , ((Number) collec[i]).doubleValue() );

 			}else if(collec[i] instanceof Date){

 				array = addDateToArray(array, i , (Date) collec[i]  );

 			}else if(collec[i] instanceof Boolean){

 				array = addBooleanToArray(array, i , ((Boolean) collec[i]).booleanValue()  );

 			}else if(collec[i] instanceof Item){

 				array = addObjectToArray(array, i , collec[i] );

 			}else{

 				array = addObjectToArray(array, i , convertObjectToJSObject(collec[i]) );

 			}

		}

 		return array;

 	};

 	 	

 	

 	

 	public static JavaScriptObject convertObjectToJSObject(Object object){

 		if(object instanceof JavaScriptObject){

 			return (JavaScriptObject) object;

 		}else if(object instanceof ConvertibleToJSObject){

 			return (((ConvertibleToJSObject)object).toJSObject());

 		}else if(object instanceof Map){

 			return convertMapToJSObject((Map<?, ?>)object);

 		}else if(object instanceof Object[]){

 			return convertArrayToJSObject((Object [])object);

 		}else if(object instanceof Collection){

 			return convertArrayToJSObject(((Collection<?>)object).toArray());

 		}else{

 			return null ; 

 		}

 	}

 	

 	public static native JavaScriptObject encapsulateObjectInArray(JavaScriptObject jsObject)/*-{

		var toReturn = @com.google.gwt.core.client.JavaScriptObject::createArray()();

		toReturn[0] = jsObject; 

		return toReturn;

	}-*/;

 	

 	private native static JavaScriptObject addObjectToArray(JavaScriptObject array , int index , JavaScriptObject toAdd)/*-{

 		array.push(toAdd);

 		return array;

 	}-*/;

 	

 	private native static JavaScriptObject addObjectToArray(JavaScriptObject array , int index , Object toAdd)/*-{

 		array.push(toAdd);

		return array;

	}-*/;

 	

 	private native static JavaScriptObject addStringToArray(JavaScriptObject array , int index , String toAdd)/*-{

 		array.push(toAdd);

		return array;

	}-*/;

 	

 	private native static JavaScriptObject addNumberToArray(JavaScriptObject array , int index , double toAdd)/*-{

 		array.push(toAdd);

		return array;

	}-*/;

 	

 	private native static JavaScriptObject addDateToArray(JavaScriptObject array , int index , Date toAdd)/*-{

 		array.push(toAdd);

		return array;

	}-*/;

 	

	private native static JavaScriptObject addBooleanToArray(JavaScriptObject array , int index , boolean toAdd)/*-{

 		array.push(toAdd);

	return array;

}-*/;

	

	public static native JavaScriptObject addAttribute(JavaScriptObject toModify , String attrName , JavaScriptObject attrValue)/*-{

 		array.push(toAdd);

	return toModify;

}-*/;



	public static native JavaScriptObject addAttribute(JavaScriptObject toModify , String attrName , String attrValue)/*-{

 		array.push(toAdd);

		return toModify;

}-*/;

 	

	public static native JavaScriptObject getBooleanValue(Boolean bool)/*-{

		return bool.@java.lang.Boolean::booleanValue()();

	}-*/;

 	

}