--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.symbian.tools.mtw.core/src/org/symbian/tools/tmw/core/internal/projects/ProjectProvider.java	Mon Aug 09 15:18:34 2010 -0700
@@ -0,0 +1,78 @@
+/**
+ * Copyright (c) 2010 Symbian Foundation and/or its subsidiary(-ies).
+ * All rights reserved.
+ * This component and the accompanying materials are made available
+ * under the terms of the License "Eclipse Public License v1.0"
+ * which accompanies this distribution, and is available
+ * at the URL "http://www.eclipse.org/legal/epl-v10.html".
+ *
+ * Initial Contributors:
+ * Symbian Foundation - initial contribution.
+ * Contributors:
+ * Description:
+ * Overview:
+ * Details:
+ * Platforms/Drives/Compatibility:
+ * Assumptions/Requirement/Pre-requisites:
+ * Failures and causes:
+ */
+package org.symbian.tools.tmw.core.internal.projects;
+
+import org.eclipse.core.expressions.EvaluationContext;
+import org.eclipse.core.expressions.EvaluationResult;
+import org.eclipse.core.expressions.Expression;
+import org.eclipse.core.expressions.ExpressionConverter;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.symbian.tools.tmw.core.TMWCore;
+import org.symbian.tools.tmw.core.projects.IMTWProject;
+import org.symbian.tools.tmw.core.projects.IMTWProjectProvider;
+
+public class ProjectProvider implements IMTWProjectProvider {
+    private final IConfigurationElement element;
+    private final Expression expression;
+    private IMTWProjectProvider provider;
+
+    public ProjectProvider(IConfigurationElement element) throws CoreException {
+        this.element = element;
+        IConfigurationElement[] children = element.getChildren("enablement");
+        if (children.length == 1) {
+            expression = ExpressionConverter.getDefault().perform(children[0]);
+        } else {
+            expression = null;
+            if (children.length > 1) {
+                TMWCore.log(
+                        "Project extension in plugin %s has several <enablement> elements. All expressions will be ignored.",
+                        element.getNamespaceIdentifier());
+            }
+        }
+    }
+
+    public IMTWProject create(IProject project) {
+        return getProvider().create(project);
+    }
+
+    private IMTWProjectProvider getProvider() {
+        if (provider == null) {
+            try {
+                provider = (IMTWProjectProvider) element.createExecutableExtension("class");
+            } catch (CoreException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        return provider;
+    }
+
+    public boolean isSupportedProject(final IProject project) {
+        try {
+            final EvaluationResult result = expression.evaluate(new EvaluationContext(null, project));
+            if (!EvaluationResult.FALSE.equals(result)) {
+                return getProvider().isSupportedProject(project);
+            }
+        } catch (CoreException e) {
+            TMWCore.log(null, e);
+        }
+        return false;
+    }
+}