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/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* For further information about Alkacon Software, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.ugc.client;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONString;
/**
* Various utility functions.
*/
public class CmsJsUtils {
/** The random number generator. */
public static final Random RANDOM = new Random();
/**
* Converts a Javascript object to a map from strings to strings, ignoring all properties
* of the object whose value is not a string.
*
* @param jso the Javascript object to convert
* @return the map containing the string-valued properties of the Javascript object
*/
public static Map convertJsObjectToMap(JavaScriptObject jso) {
Map result = new HashMap();
JSONObject json = new JSONObject(jso);
for (String key : json.keySet()) {
if ((json.get(key) != null) && (json.get(key).isString() != null)) {
result.put(key, json.get(key).isString().stringValue());
} else {
result.put(key, null);
}
}
return result;
}
/**
* Converts a map whose keys and values are strings to a Javascript object with the keys as attributes and the
* corresponding values as the attribute values.
*
* @param stringMap the map to convert
* @return the Javascript object with the attributes defined by the map
*/
public static JavaScriptObject convertMapToJsObject(Map stringMap) {
if (stringMap == null) {
return null;
}
JSONObject json = new JSONObject();
for (Map.Entry entry : stringMap.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
json.put(key, new JSONString(value));
}
return json.getJavaScriptObject();
}
/**
* Generates a random id.
*
* @return the random id
*/
public static String generateRandomId() {
StringBuffer buffer = new StringBuffer();
int base = 36;
for (int i = 0; i < 16; i++) {
buffer.append(Integer.toString(RANDOM.nextInt(base), base));
}
return buffer.toString();
}
}