org.argeo.cms.ui/src/org/argeo/cms/script/ScriptUi.java

   1 package org.argeo.cms.script;
   2
   3 import java.io.IOException;
   4 import java.io.InputStreamReader;
   5 import java.io.Reader;
   6 import java.net.URL;
   7
   8 import javax.jcr.Node;
   9 import javax.jcr.RepositoryException;
  10 import javax.script.Invocable;
  11 import javax.script.ScriptEngine;
  12 import javax.script.ScriptEngineManager;
  13 import javax.script.ScriptException;
  14
  15 import org.apache.commons.logging.Log;
  16 import org.apache.commons.logging.LogFactory;
  17 import org.argeo.cms.ui.CmsUiProvider;
  18 import org.eclipse.swt.widgets.Composite;
  19 import org.eclipse.swt.widgets.Control;
  20 import org.osgi.framework.BundleContext;
  21 import org.osgi.framework.wiring.BundleWiring;
  22
  23 public class ScriptUi implements CmsUiProvider {
  24         private final static Log log = LogFactory.getLog(ScriptUi.class);
  25
  26         private boolean development = true;
  27         private ScriptEngine scriptEngine;
  28
  29         private URL appUrl;
  30         // private BundleContext bundleContext;
  31         // private String path;
  32
  33         // private Bindings bindings;
  34         // private String script;
  35
  36         public ScriptUi(BundleContext bundleContext, String path) {
  37                 ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
  38                 ClassLoader bundleCl = bundleContext.getBundle().adapt(BundleWiring.class).getClassLoader();
  39                 ClassLoader currentCcl = Thread.currentThread().getContextClassLoader();
  40                 try {
  41                         Thread.currentThread().setContextClassLoader(bundleCl);
  42                         scriptEngine = scriptEngineManager.getEngineByName("JavaScript");
  43                         scriptEngine.put(CmsScriptRwtApplication.BC, bundleContext);
  44                 } catch (Exception e) {
  45                         e.printStackTrace();
  46                 } finally {
  47                         Thread.currentThread().setContextClassLoader(currentCcl);
  48                 }
  49                 this.appUrl = bundleContext.getBundle().getEntry(path);
  50                 load();
  51         }
  52
  53         private void load() {
  54 //              try (Reader reader = new InputStreamReader(appUrl.openStream())) {
  55 //                      scriptEngine.eval(reader);
  56 //              } catch (IOException | ScriptException e) {
  57 //                      log.warn("Cannot execute " + appUrl, e);
  58 //              }
  59
  60                 try {
  61                         scriptEngine.eval("load('" + appUrl + "')");
  62                 } catch (ScriptException e) {
  63                         log.warn("Cannot execute " + appUrl, e);
  64                 }
  65
  66         }
  67
  68         // public ScriptUiProvider(ScriptEngine scriptEngine, String script) throws
  69         // ScriptException {
  70         // super();
  71         // this.scriptEngine = scriptEngine;
  72         // this.script = script;
  73         // bindings = scriptEngine.createBindings();
  74         // scriptEngine.eval(script, bindings);
  75         // }
  76
  77         @Override
  78         public Control createUi(Composite parent, Node context) throws RepositoryException {
  79                 long begin = System.currentTimeMillis();
  80                 // if (bindings == null) {
  81                 // bindings = scriptEngine.createBindings();
  82                 // try {
  83                 // scriptEngine.eval(script, bindings);
  84                 // } catch (ScriptException e) {
  85                 // log.warn("Cannot evaluate script", e);
  86                 // }
  87                 // }
  88                 // Bindings bindings = scriptEngine.createBindings();
  89                 // bindings.put("parent", parent);
  90                 // bindings.put("context", context);
  91                 // URL appUrl = bundleContext.getBundle().getEntry(path);
  92                 // try (Reader reader = new InputStreamReader(appUrl.openStream())) {
  93                 // scriptEngine.eval(reader,bindings);
  94                 // } catch (IOException | ScriptException e) {
  95                 // log.warn("Cannot execute " + appUrl, e);
  96                 // }
  97
  98                 if (development)
  99                         load();
 100
 101                 Invocable invocable = (Invocable) scriptEngine;
 102                 try {
 103                         invocable.invokeFunction("createUi", parent, context);
 104                 } catch (NoSuchMethodException e) {
 105                         // TODO Auto-generated catch block
 106                         e.printStackTrace();
 107                 } catch (ScriptException e) {
 108                         // TODO Auto-generated catch block
 109                         e.printStackTrace();
 110                 }
 111
 112                 long duration = System.currentTimeMillis() - begin;
 113                 if (log.isDebugEnabled())
 114                         log.debug(appUrl + " UI in " + duration + " ms");
 115                 return null;
 116         }
 117
 118 }