--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.symbian.tools.mtw.ui/src/org/symbian/tools/mtw/internal/deployment/DeploymentTargetTypeDescriptor.java	Wed Jul 28 14:07:39 2010 -0700
@@ -0,0 +1,148 @@
+/**
+ * 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.mtw.internal.deployment;
+
+import java.util.Map;
+import java.util.WeakHashMap;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.jobs.ISchedulingRule;
+import org.eclipse.jface.resource.ImageDescriptor;
+import org.symbian.tools.mtw.core.projects.IMTWProject;
+import org.symbian.tools.mtw.ui.MTWCoreUI;
+import org.symbian.tools.mtw.ui.deployment.IDeploymentTarget;
+import org.symbian.tools.mtw.ui.deployment.IDeploymentTargetType;
+
+public final class DeploymentTargetTypeDescriptor implements IDeploymentTargetType {
+    public class NullProvider implements IDeploymentTargetType {
+        public IDeploymentTarget[] getTargets(IMTWProject project) {
+            return null;
+        }
+
+        public void discoverTargets(IProgressMonitor monitor) throws CoreException {
+            // Do nothing
+        }
+
+        public IDeploymentTarget findTarget(IMTWProject project, String id) {
+            return null;
+        }
+
+        public boolean targetsDiscovered() {
+            return true;
+        }
+
+        public ISchedulingRule getSchedulingRule(IDeploymentTarget target) {
+            return null; // No scheduling
+        }
+    }
+
+    private static final DeploymentTargetWrapper[] NO_TARGETS = new DeploymentTargetWrapper[0];
+    private final IConfigurationElement element;
+    private IDeploymentTargetType type;
+    private final Map<IDeploymentTarget, DeploymentTargetWrapper> wrappers = new WeakHashMap<IDeploymentTarget, DeploymentTargetWrapper>();
+    private ImageDescriptor imageDescriptor = null;
+
+    public DeploymentTargetTypeDescriptor(IConfigurationElement element) {
+        this.element = element;
+    }
+
+    public boolean supports(IMTWProject project) {
+        // We will support more declarative filtering later
+        return true;
+    }
+
+    public DeploymentTargetWrapper[] getTargets(IMTWProject project) {
+        final DeploymentTargetWrapper[] targets = wrap(getProvider().getTargets(project));
+        return targets != null ? targets : NO_TARGETS;
+    }
+
+    private DeploymentTargetWrapper[] wrap(IDeploymentTarget[] targets) {
+        final DeploymentTargetWrapper[] w = new DeploymentTargetWrapper[targets.length];
+        for (int i = 0; i < targets.length; i++) {
+            final IDeploymentTarget target = targets[i];
+            DeploymentTargetWrapper wrapper = wrappers.get(target);
+            if (wrapper == null) {
+                wrapper = new DeploymentTargetWrapper(target, this);
+                wrappers.put(target, wrapper);
+            }
+            w[i] = wrapper;
+        }
+        return w;
+    }
+
+    public void discoverTargets(IProgressMonitor monitor) throws CoreException {
+        getProvider().discoverTargets(monitor);
+    }
+
+    public IDeploymentTarget findTarget(IMTWProject project, String id) {
+        return getProvider().findTarget(project, id);
+    }
+
+    private synchronized IDeploymentTargetType getProvider() {
+        if (type == null) {
+            try {
+                type = (IDeploymentTargetType) element.createExecutableExtension("class");
+            } catch (CoreException e) {
+                MTWCoreUI.log("Cannot instantiate provider " + getId(), e);
+                type = new NullProvider();
+            }
+        }
+        return type;
+    }
+
+    public String getId() {
+        return element.getAttribute("id");
+    }
+
+    public boolean targetsDiscovered() {
+        return getProvider().targetsDiscovered();
+    }
+
+    public int getPriority() {
+        final String attribute = element.getAttribute("priority");
+        if (attribute != null && attribute.trim().length() > 0) {
+            try {
+                return Integer.parseInt(attribute);
+            } catch (NumberFormatException e) {
+                MTWCoreUI.log(String.format("%s is not a valid priority value for %s provider", attribute, getId()),
+                        null);
+            }
+        }
+        return 0;
+    }
+
+    public ImageDescriptor getImageDescriptor() {
+        if (imageDescriptor == null) {
+            final String image = element.getAttribute("icon");
+            if (image == null) {
+                imageDescriptor = ImageDescriptor.getMissingImageDescriptor();
+            } else {
+                imageDescriptor = MTWCoreUI.imageDescriptorFromPlugin(element.getNamespaceIdentifier(), image);
+            }
+        }
+        return imageDescriptor;
+    }
+
+    public ISchedulingRule getSchedulingRule(IDeploymentTarget target) {
+        return type.getSchedulingRule(target);
+    }
+
+}