ScriptUi.java

   1 package org.argeo.cms.script;
   2
   3 import java.net.URL;
   4
   5 import javax.jcr.Node;
   6 import javax.jcr.RepositoryException;
   7 import javax.script.Invocable;
   8 import javax.script.ScriptEngine;
   9 import javax.script.ScriptEngineManager;
  10 import javax.script.ScriptException;
  11
  12 import org.apache.commons.logging.Log;
  13 import org.apache.commons.logging.LogFactory;
  14 import org.argeo.cms.ui.CmsUiProvider;
  15 import org.eclipse.swt.widgets.Composite;
  16 import org.eclipse.swt.widgets.Control;
  17 import org.osgi.framework.BundleContext;
  18 import org.osgi.framework.wiring.BundleWiring;
  19
  20 public class ScriptUi implements CmsUiProvider {
  21         private final static Log log = LogFactory.getLog(ScriptUi.class);
  22
  23         private boolean development = true;
  24         private ScriptEngine scriptEngine;
  25
  26         private URL appUrl;
  27         // private BundleContext bundleContext;
  28         // private String path;
  29
  30         // private Bindings bindings;
  31         // private String script;
  32
  33         public ScriptUi(BundleContext bundleContext, String path) {
  34                 ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
  35                 ClassLoader bundleCl = bundleContext.getBundle().adapt(BundleWiring.class).getClassLoader();
  36                 ClassLoader currentCcl = Thread.currentThread().getContextClassLoader();
  37                 try {
  38                         Thread.currentThread().setContextClassLoader(bundleCl);
  39                         scriptEngine = scriptEngineManager.getEngineByName("JavaScript");
  40                         scriptEngine.put(CmsScriptRwtApplication.BC, bundleContext);
  41                 } catch (Exception e) {
  42                         e.printStackTrace();
  43                 } finally {
  44                         Thread.currentThread().setContextClassLoader(currentCcl);
  45                 }
  46                 this.appUrl = bundleContext.getBundle().getEntry(path);
  47                 load();
  48         }
  49
  50         private void load() {
  51 //              try (Reader reader = new InputStreamReader(appUrl.openStream())) {
  52 //                      scriptEngine.eval(reader);
  53 //              } catch (IOException | ScriptException e) {
  54 //                      log.warn("Cannot execute " + appUrl, e);
  55 //              }
  56
  57                 try {
  58                         scriptEngine.eval("load('" + appUrl + "')");
  59                 } catch (ScriptException e) {
  60                         log.warn("Cannot execute " + appUrl, e);
  61                 }
  62
  63         }
  64
  65         // public ScriptUiProvider(ScriptEngine scriptEngine, String script) throws
  66         // ScriptException {
  67         // super();
  68         // this.scriptEngine = scriptEngine;
  69         // this.script = script;
  70         // bindings = scriptEngine.createBindings();
  71         // scriptEngine.eval(script, bindings);
  72         // }
  73
  74         @Override
  75         public Control createUi(Composite parent, Node context) throws RepositoryException {
  76                 long begin = System.currentTimeMillis();
  77                 // if (bindings == null) {
  78                 // bindings = scriptEngine.createBindings();
  79                 // try {
  80                 // scriptEngine.eval(script, bindings);
  81                 // } catch (ScriptException e) {
  82                 // log.warn("Cannot evaluate script", e);
  83                 // }
  84                 // }
  85                 // Bindings bindings = scriptEngine.createBindings();
  86                 // bindings.put("parent", parent);
  87                 // bindings.put("context", context);
  88                 // URL appUrl = bundleContext.getBundle().getEntry(path);
  89                 // try (Reader reader = new InputStreamReader(appUrl.openStream())) {
  90                 // scriptEngine.eval(reader,bindings);
  91                 // } catch (IOException | ScriptException e) {
  92                 // log.warn("Cannot execute " + appUrl, e);
  93                 // }
  94
  95                 if (development)
  96                         load();
  97
  98                 Invocable invocable = (Invocable) scriptEngine;
  99                 try {
 100                         invocable.invokeFunction("createUi", parent, context);
 101                 } catch (NoSuchMethodException e) {
 102                         // TODO Auto-generated catch block
 103                         e.printStackTrace();
 104                 } catch (ScriptException e) {
 105                         // TODO Auto-generated catch block
 106                         e.printStackTrace();
 107                 }
 108
 109                 long duration = System.currentTimeMillis() - begin;
 110                 if (log.isTraceEnabled())
 111                         log.trace(appUrl + " UI in " + duration + " ms");
 112                 return null;
 113         }
 114
 115 }