fix issue #305 Debugger slow when watching variables (#203)

* fix issue #305 Debugger slow when watching variables

* Use the source containers from source lookup provider.

Author: andxu

com.microsoft.java.debug.plugin/src/main/java/com/microsoft/java/debug/plugin/internal/eval/JdtEvaluationProvider.java

@@ -28,7 +28,6 @@
 import org.apache.commons.lang3.reflect.FieldUtils;
 import org.eclipse.core.resources.IWorkspaceRoot;
 import org.eclipse.core.resources.ResourcesPlugin;
-import org.eclipse.core.runtime.CoreException;
 import org.eclipse.debug.core.DebugException;
 import org.eclipse.debug.core.ILaunch;
 import org.eclipse.debug.core.ILaunchConfiguration;
@@ -37,7 +36,7 @@
 import org.eclipse.debug.core.model.ISourceLocator;
 import org.eclipse.debug.core.model.IStackFrame;
 import org.eclipse.debug.core.sourcelookup.AbstractSourceLookupDirector;
-import org.eclipse.debug.core.sourcelookup.containers.ProjectSourceContainer;
+import org.eclipse.debug.core.sourcelookup.ISourceContainer;
 import org.eclipse.jdt.core.IJavaProject;
 import org.eclipse.jdt.debug.core.IJavaStackFrame;
 import org.eclipse.jdt.debug.eval.ICompiledExpression;
@@ -52,6 +51,8 @@
 import com.microsoft.java.debug.core.adapter.Constants;
 import com.microsoft.java.debug.core.adapter.IDebugAdapterContext;
 import com.microsoft.java.debug.core.adapter.IEvaluationProvider;
+import com.microsoft.java.debug.core.adapter.ISourceLookUpProvider;
+import com.microsoft.java.debug.plugin.internal.JdtSourceLookUpProvider;
 import com.microsoft.java.debug.plugin.internal.JdtUtils;
 import com.sun.jdi.StackFrame;
 import com.sun.jdi.ThreadReference;
@@ -319,7 +320,8 @@ private void ensureDebugTarget(VirtualMachine vm, ThreadReference thread, int de
             }
 
             if (launch == null) {
-                launch = createILaunchMock(project);
+                ISourceLookUpProvider sourceProvider = context.getProvider(ISourceLookUpProvider.class);
+                launch = createILaunchMock(project, ((JdtSourceLookUpProvider) sourceProvider).getSourceContainers());
             }
 
             debugTarget = new JDIDebugTarget(launch, vm, "", false, false, null, false) {
@@ -331,7 +333,7 @@ protected synchronized void initialize() {
         }
     }
 
-    private static ILaunch createILaunchMock(IJavaProject project) {
+    private static ILaunch createILaunchMock(IJavaProject project, ISourceContainer[] containers) {
         return new ILaunch() {
             private AbstractSourceLookupDirector locator;
 
@@ -405,9 +407,8 @@ public ISourceLocator getSourceLocator() {
                 locator = new JavaSourceLookupDirector();
 
                 try {
-                    locator.setSourceContainers(
-                            new ProjectSourceContainer(project.getProject(), true).getSourceContainers());
-                } catch (CoreException e) {
+                    locator.setSourceContainers(containers);
+                } catch (Exception e) {
                     logger.severe(String.format("Cannot initialize JavaSourceLookupDirector: %s", e.toString()));
                 }
                 locator.initializeParticipants();