fdo#46102: Load Java scripts with class loaders that actually find them

ScriptMetaData.createURL produces weird URLs (ending in "/ucb/", and potentially
still containing vnd.sun.star.expand: prefix) that are apparently good for
loading documents for editing via UCBStreamHandler, but cannot meaningfully be
passed to a URLClassLoader.

It is unclear to me how the Java script provider shall ever have found the
script jars in the past.

scripting/java/com/sun/star/script/framework/container/ScriptMetaData.java

@@ -50,7 +50,14 @@ import com.sun.star.script.framework.io.UCBStreamHandler;
 
 import com.sun.star.ucb.XSimpleFileAccess2;
 
+import com.sun.star.uno.AnyConverter;
 import com.sun.star.uno.UnoRuntime;
+import com.sun.star.uno.XComponentContext;
+
+import com.sun.star.uri.UriReferenceFactory;
+import com.sun.star.uri.XVndSunStarExpandUrl;
+
+import com.sun.star.util.XMacroExpander;
 
 public class ScriptMetaData extends ScriptEntry implements Cloneable {
     private boolean hasSource = false;
@@ -246,7 +253,8 @@ public class ScriptMetaData extends ScriptEntry implements Cloneable {
         return "\nParcelLocation = " + getParcelLocation() + "\nLocationPlaceHolder = " + locationPlaceHolder + super.toString();
     }
 
-    public URL[] getClassPath() throws java.net.MalformedURLException
+    public URL[] getClassPath(XComponentContext context)
+        throws java.net.MalformedURLException
     {
     try
     {
@@ -274,7 +282,7 @@ public class ScriptMetaData extends ScriptEntry implements Cloneable {
         {
             String relativeClasspath =  (String)stk.nextElement();
             String pathToProcess  = PathUtils.make_url( parcelPath, relativeClasspath);
-            URL url = createURL( pathToProcess );
+            URL url = expandURL( context, pathToProcess );
             if ( url != null )
             {
                 classPathVec.add (  url  );
@@ -283,7 +291,7 @@ public class ScriptMetaData extends ScriptEntry implements Cloneable {
         }
         if ( classPathVec.size() == 0)
         {
-            URL url = createURL( parcelPath );
+            URL url = expandURL( context, parcelPath );
             if ( url != null )
             {
                 classPathVec.add(url);
@@ -300,6 +308,38 @@ public class ScriptMetaData extends ScriptEntry implements Cloneable {
     }
 
     }
+
+    private URL expandURL(XComponentContext context, String url)
+        throws java.net.MalformedURLException
+    {
+        XVndSunStarExpandUrl exp = UnoRuntime.queryInterface(
+            XVndSunStarExpandUrl.class,
+            UriReferenceFactory.create(context).parse(url));
+        String expurl;
+        if (exp == null) {
+            expurl = url;
+        } else {
+            XMacroExpander expander;
+            try {
+                expander = (XMacroExpander) AnyConverter.toObject(
+                    XMacroExpander.class,
+                    context.getValueByName(
+                        "/singletons/com.sun.star.util.theMacroExpander"));
+            } catch (com.sun.star.lang.IllegalArgumentException e) {
+                throw new RuntimeException(e);
+            }
+            try {
+                expurl = exp.expand(expander);
+            } catch (com.sun.star.lang.IllegalArgumentException e) {
+                java.net.MalformedURLException e2 =
+                    new java.net.MalformedURLException(e.toString());
+                e2.initCause(e);
+                throw e2;
+            }
+        }
+        return new URL(expurl);
+    }
+
     private URL createURL( String path ) throws java.net.MalformedURLException
     {
         URL url = null;

scripting/java/com/sun/star/script/framework/provider/ClassLoaderFactory.java

@@ -31,6 +31,7 @@ import java.net.*;
 
 import com.sun.star.script.framework.log.LogUtils;
 import com.sun.star.script.framework.container.ScriptMetaData;
+import com.sun.star.uno.XComponentContext;
 
 /**
  *  Class Loader Factory
@@ -42,11 +43,12 @@ public class ClassLoaderFactory
 {
     private ClassLoaderFactory() {}
 
-    public static ClassLoader getURLClassLoader( ScriptMetaData scriptData )
+    public static ClassLoader getURLClassLoader(
+        XComponentContext context, ScriptMetaData scriptData )
         throws NoSuitableClassLoaderException, MalformedURLException
     {
         ClassLoader parent = scriptData.getClass().getClassLoader();
-        URL[] classPath = scriptData.getClassPath();
+        URL[] classPath = scriptData.getClassPath(context);
         LogUtils.DEBUG("Classpath has length " + classPath.length );
         for ( int i=0; i < classPath.length; i++ )
         {

scripting/java/com/sun/star/script/framework/provider/beanshell/ScriptEditorForBeanShell.java

@@ -202,7 +202,8 @@ public class ScriptEditorForBeanShell
             try {
                 ClassLoader cl = null;
                 try {
-                    cl = ClassLoaderFactory.getURLClassLoader( entry );
+                    cl = ClassLoaderFactory.getURLClassLoader(
+                        context.getComponentContext(), entry );
                 }
                 catch (Exception ignore) // TODO re-examine error handling
                 {

scripting/java/com/sun/star/script/framework/provider/beanshell/ScriptProviderForBeanShell.java

@@ -196,7 +196,8 @@ class ScriptImpl implements XScript
             ClassLoader cl = null;
             URL sourceUrl = null;
             try {
-                cl = ClassLoaderFactory.getURLClassLoader( metaData );
+                cl = ClassLoaderFactory.getURLClassLoader(
+                    m_xContext, metaData );
                 sourceUrl = metaData.getSourceURL();
             }
             catch ( java.net.MalformedURLException mfu )

scripting/java/com/sun/star/script/framework/provider/java/ScriptProviderForJava.java

@@ -205,7 +205,7 @@ class ScriptImpl implements XScript
             try {
                 LogUtils.DEBUG( "Classloader starting..." );
                 scriptLoader = ClassLoaderFactory.getURLClassLoader(
-                        metaData );
+                    m_xContext, metaData );
                 LogUtils.DEBUG( "Classloader finished..." );
             }
             catch (MalformedURLException mfe )

scripting/java/com/sun/star/script/framework/provider/javascript/ScriptProviderForJavaScript.java

@@ -195,7 +195,8 @@ class ScriptImpl implements XScript
             ClassLoader cl = null;
             URL sourceUrl = null;
             try {
-                cl = ClassLoaderFactory.getURLClassLoader( metaData );
+                cl = ClassLoaderFactory.getURLClassLoader(
+                    m_xContext, metaData );
                 sourceUrl = metaData.getSourceURL();
             }
             catch ( java.net.MalformedURLException mfu )