jaroslav@813: /**
jaroslav@813:  * Back 2 Browser Bytecode Translator
jaroslav@813:  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@813:  *
jaroslav@813:  * This program is free software: you can redistribute it and/or modify
jaroslav@813:  * it under the terms of the GNU General Public License as published by
jaroslav@813:  * the Free Software Foundation, version 2 of the License.
jaroslav@813:  *
jaroslav@813:  * This program is distributed in the hope that it will be useful,
jaroslav@813:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
jaroslav@813:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
jaroslav@813:  * GNU General Public License for more details.
jaroslav@813:  *
jaroslav@813:  * You should have received a copy of the GNU General Public License
jaroslav@813:  * along with this program. Look for COPYING file in the top folder.
jaroslav@813:  * If not, see http://opensource.org/licenses/GPL-2.0.
jaroslav@813:  */
jaroslav@813: package org.apidesign.bck2brwsr.htmlpage;
jaroslav@813: 
jaroslav@992: import java.io.IOException;
jaroslav@992: import java.io.InputStream;
jaroslav@992: import java.io.InputStreamReader;
jaroslav@992: import java.io.PushbackInputStream;
jaroslav@992: import java.io.Reader;
jaroslav@992: import java.net.URL;
jaroslav@992: import java.util.Iterator;
jaroslav@992: import java.util.concurrent.Executor;
jaroslav@992: import java.util.concurrent.Executors;
jaroslav@992: import java.util.logging.Level;
jaroslav@992: import java.util.logging.Logger;
jaroslav@992: import javafx.application.Platform;
jaroslav@990: import netscape.javascript.JSObject;
jaroslav@813: import org.apidesign.bck2brwsr.core.JavaScriptBody;
jaroslav@992: import org.json.JSONArray;
jaroslav@992: import org.json.JSONException;
jaroslav@992: import org.json.JSONObject;
jaroslav@992: import org.json.JSONTokener;
jaroslav@813: 
jaroslav@813: /**
jaroslav@813:  *
jaroslav@813:  * @author Jaroslav Tulach <jtulach@netbeans.org>
jaroslav@813:  */
jaroslav@813: public final class ConvertTypes {
jaroslav@992:     private static final Logger LOG = Logger.getLogger(ConvertTypes.class.getName());
jaroslav@813:     ConvertTypes() {
jaroslav@813:     }
jaroslav@813:     
jaroslav@813:     public static String toString(Object object, String property) {
jaroslav@813:         Object ret = getProperty(object, property);
jaroslav@813:         return ret == null ? null : ret.toString();
jaroslav@813:     }
jaroslav@813: 
jaroslav@813:     public static double toDouble(Object object, String property) {
jaroslav@813:         Object ret = getProperty(object, property);
jaroslav@813:         return ret instanceof Number ? ((Number)ret).doubleValue() : Double.NaN;
jaroslav@813:     }
jaroslav@813: 
jaroslav@813:     public static int toInt(Object object, String property) {
jaroslav@813:         Object ret = getProperty(object, property);
jaroslav@813:         return ret instanceof Number ? ((Number)ret).intValue() : Integer.MIN_VALUE;
jaroslav@813:     }
jaroslav@906: 
jaroslav@906:     public static <T> T toModel(Class<T> modelClass, Object object, String property) {
jaroslav@906:         Object ret = getProperty(object, property);
jaroslav@990:         if (ret instanceof JSObject) {
jaroslav@990:             Object real = ((JSObject)ret).getMember("koModel");
jaroslav@990:             if (real != null) {
jaroslav@990:                 ret = real;
jaroslav@990:             }
jaroslav@990:         }
jaroslav@906:         if (ret == null || modelClass.isInstance(ret)) {
jaroslav@906:             return modelClass.cast(ret);
jaroslav@906:         }
jaroslav@906:         throw new IllegalStateException("Value " + ret + " is not of type " + modelClass);
jaroslav@906:     }
jaroslav@813:     
jaroslav@920:     public static String toJSON(Object value) {
jaroslav@920:         if (value == null) {
jaroslav@920:             return "null";
jaroslav@920:         }
jaroslav@920:         if (value instanceof String) {
jaroslav@920:             return '"' + 
jaroslav@920:                 ((String)value).
jaroslav@920:                     replace("\"", "\\\"").
jaroslav@920:                     replace("\n", "\\n").
jaroslav@920:                     replace("\r", "\\r").
jaroslav@920:                     replace("\t", "\\t")
jaroslav@920:                 + '"';
jaroslav@920:         }
jaroslav@920:         return value.toString();
jaroslav@920:     }
jaroslav@920:     
jaroslav@813:     @JavaScriptBody(args = { "object", "property" },
jaroslav@879:         body = "if (property === null) return object;\n"
jaroslav@879:         + "var p = object[property]; return p ? p : null;"
jaroslav@813:     )
jaroslav@813:     private static Object getProperty(Object object, String property) {
jaroslav@990:         if (property == null) {
jaroslav@990:             return object;
jaroslav@990:         } else {
jaroslav@990:             if (object instanceof JSObject) {
jaroslav@990:                 JSObject jo = (JSObject)object;
jaroslav@990:                 return jo.getMember(property);
jaroslav@990:             }
jaroslav@990:             return null;
jaroslav@990:         }
jaroslav@813:     }
jaroslav@954:     
jaroslav@954:     public static String createJSONP(Object[] jsonResult, Runnable whenDone) {
jaroslav@992:         return "json" + Integer.toHexString(whenDone.hashCode());
jaroslav@954:     }
jaroslav@934: 
jaroslav@954:     public static void loadJSON(
jaroslav@954:         String url, Object[] jsonResult, Runnable whenDone, String jsonp
jaroslav@954:     ) {
jaroslav@992:         REQ.execute(new LoadJSON(url, jsonResult, whenDone, jsonp));
jaroslav@992:     }
jaroslav@992:     
jaroslav@992:     private static final Executor REQ = Executors.newCachedThreadPool();
jaroslav@992:     private static final class LoadJSON implements Runnable {
jaroslav@992:         
jaroslav@992:         private final String url;
jaroslav@992:         private final Object[] jsonResult;
jaroslav@992:         private final Runnable whenDone;
jaroslav@992:         private final String jsonp;
jaroslav@992: 
jaroslav@992:         LoadJSON(String url, Object[] jsonResult, Runnable whenDone, String jsonp) {
jaroslav@992:             this.url = url;
jaroslav@992:             this.jsonResult = jsonResult;
jaroslav@992:             this.whenDone = whenDone;
jaroslav@992:             this.jsonp = jsonp;
jaroslav@992:         }
jaroslav@992: 
jaroslav@992:         @Override
jaroslav@992:         public void run() {
jaroslav@992:             if (Platform.isFxApplicationThread()) {
jaroslav@992:                 whenDone.run();
jaroslav@992:                 return;
jaroslav@992:             }
jaroslav@992:             try {
jaroslav@992:                 URL u = new URL(url.replace(" ", "%20"));
jaroslav@992:                 InputStream is = u.openStream();
jaroslav@992:                 if (jsonp != null) {
jaroslav@992:                     PushbackInputStream pis = new PushbackInputStream(is, 1);
jaroslav@992:                     is = pis;
jaroslav@992:                     for (;;) {
jaroslav@992:                         int ch = pis.read();
jaroslav@992:                         if (ch == -1) {
jaroslav@992:                             break;
jaroslav@992:                         }
jaroslav@992:                         if (ch == '{') {
jaroslav@992:                             pis.unread(ch);
jaroslav@992:                             break;
jaroslav@992:                         }
jaroslav@992:                     }
jaroslav@992:                 }
jaroslav@992:                 Reader r = new InputStreamReader(is, "UTF-8");
jaroslav@992:                 
jaroslav@992:                 JSONTokener tok = new JSONTokener(r);
jaroslav@992:                 JSONObject obj = new JSONObject(tok);
jaroslav@992:                 jsonResult[0] = convertToArray(obj);
jaroslav@992:             } catch (JSONException | IOException ex) {
jaroslav@992:                 jsonResult[0] = ex;
jaroslav@997:                 LOG.log(Level.WARNING, "Cannot connect to " + url, ex);
jaroslav@992:             } finally {
jaroslav@992:                 Platform.runLater(this);
jaroslav@992:             }
jaroslav@992:         }
jaroslav@992:         
jaroslav@992:         private static Object convertToArray(Object o) throws JSONException {
jaroslav@992:             if (o instanceof JSONArray) {
jaroslav@992:                 JSONArray ja = (JSONArray)o;
jaroslav@992:                 Object[] arr = new Object[ja.length()];
jaroslav@992:                 for (int i = 0; i < arr.length; i++) {
jaroslav@992:                     arr[i] = convertToArray(ja.get(i));
jaroslav@992:                 }
jaroslav@992:                 return arr;
jaroslav@992:             } else if (o instanceof JSONObject) {
jaroslav@992:                 JSONObject obj = (JSONObject)o;
jaroslav@992:                 Iterator it = obj.keys();
jaroslav@992:                 while (it.hasNext()) {
jaroslav@992:                     String key = (String)it.next();
jaroslav@992:                     obj.put(key, convertToArray(obj.get(key)));
jaroslav@992:                 }
jaroslav@992:                 return obj;
jaroslav@992:             } else {
jaroslav@992:                 return o;
jaroslav@992:             }
jaroslav@954:         }
jaroslav@954:     }
jaroslav@954:     
jaroslav@954:     @JavaScriptBody(args = { "url", "jsonp" }, body = 
jaroslav@954:         "var scrpt = window.document.createElement('script');\n "
jaroslav@954:         + "scrpt.setAttribute('src', url);\n "
jaroslav@954:         + "scrpt.setAttribute('id', jsonp);\n "
jaroslav@954:         + "scrpt.setAttribute('type', 'text/javascript');\n "
jaroslav@954:         + "var body = document.getElementsByTagName('body')[0];\n "
jaroslav@954:         + "body.appendChild(scrpt);\n"
jaroslav@954:     )
jaroslav@954:     private static void loadJSONP(String url, String jsonp) {
jaroslav@954:         
jaroslav@954:     }
jaroslav@954:     
jaroslav@934:     public static void extractJSON(Object jsonObject, String[] props, Object[] values) {
jaroslav@992:         if (jsonObject instanceof JSONObject) {
jaroslav@992:             JSONObject obj = (JSONObject)jsonObject;
jaroslav@992:             for (int i = 0; i < props.length; i++) {
jaroslav@992:                 try {
jaroslav@992:                     values[i] = obj.get(props[i]);
jaroslav@992:                 } catch (JSONException ex) {
jaroslav@992:                     LOG.log(Level.SEVERE, "Can't read " + props[i] + " from " + jsonObject, ex);
jaroslav@992:                 }
jaroslav@992:             }
jaroslav@992:             
jaroslav@934:         }
jaroslav@992:         
jaroslav@934:     }
jaroslav@934:     
jaroslav@813: }