1 /**

     2  * Copyright (c) 2010 Symbian Foundation and/or its subsidiary(-ies).

     3  * All rights reserved.

     4  * This component and the accompanying materials are made available

     5  * under the terms of the License "Eclipse Public License v1.0"

     6  * which accompanies this distribution, and is available

     7  * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8  *

     9  * Initial Contributors:

    10  * Symbian Foundation - initial contribution.

    11  * Contributors:

    12  * Description:

    13  * Overview:

    14  * Details:

    15  * Platforms/Drives/Compatibility:

    16  * Assumptions/Requirement/Pre-requisites:

    17  * Failures and causes:

    18  */

    19 package org.symbian.tools.tmw.previewer.internal;

    20 

    21 import java.io.InputStream;

    22 import java.util.HashMap;

    23 import java.util.Map;

    24 

    25 import org.eclipse.core.resources.IFile;

    26 import org.eclipse.core.resources.IProject;

    27 import org.eclipse.core.runtime.CoreException;

    28 import org.eclipse.core.runtime.IConfigurationElement;

    29 import org.eclipse.core.runtime.IPath;

    30 import org.eclipse.core.runtime.Platform;

    31 import org.symbian.tools.tmw.core.TMWCore;

    32 import org.symbian.tools.tmw.core.projects.ITMWProject;

    33 import org.symbian.tools.tmw.core.runtimes.IMobileWebRuntime;

    34 import org.symbian.tools.tmw.previewer.PreviewerPlugin;

    35 import org.symbian.tools.tmw.previewer.core.IApplicationLayoutProvider;

    36 import org.symbian.tools.tmw.previewer.core.IPreviewerExtensionsManager;

    37 

    38 public class PreviewerExtensionsManagerImpl implements IPreviewerExtensionsManager {

    39     public static final class LazyProvider implements IApplicationLayoutProvider {

    40         private final IConfigurationElement element;

    41         private IApplicationLayoutProvider instance;

    42 

    43         public LazyProvider(IConfigurationElement element) {

    44             this.element = element;

    45         }

    46 

    47         public IPath getResourcePath(IFile file) {

    48             return getDelegate().getResourcePath(file);

    49         }

    50 

    51         private IApplicationLayoutProvider getDelegate() {

    52             if (instance == null) {

    53                 try {

    54                     instance = (IApplicationLayoutProvider) element.createExecutableExtension("class");

    55                 } catch (CoreException e) {

    56                     PreviewerPlugin.log(e);

    57                     instance = new IApplicationLayoutProvider() {

    58 

    59                         public IPath getResourcePath(IFile file) {

    60                             return null;

    61                         }

    62 

    63                         public InputStream getResourceFromPath(IProject project, IPath path) {

    64                             return null;

    65                         }

    66 

    67                         public IFile getWorkspaceFile(IProject project, IPath applicationPath) {

    68                             return null;

    69                         }

    70                     };

    71                 }

    72             }

    73             return instance;

    74         }

    75 

    76         public InputStream getResourceFromPath(IProject project, IPath path) throws CoreException {

    77             return getDelegate().getResourceFromPath(project, path);

    78         }

    79 

    80         public IFile getWorkspaceFile(IProject project, IPath applicationPath) throws CoreException {

    81             return getDelegate().getWorkspaceFile(project, applicationPath);

    82         }

    83     }

    84 

    85     private Map<IMobileWebRuntime, IApplicationLayoutProvider> providers;

    86 

    87     public IApplicationLayoutProvider getLayoutProvider(IProject project) {

    88         final ITMWProject p = TMWCore.create(project);

    89         if (p != null && p.getTargetRuntime() != null) {

    90             checkRegistry();

    91             return providers.get(p.getTargetRuntime());

    92         }

    93         return null;

    94     }

    95 

    96     private synchronized void checkRegistry() {

    97         if (providers == null) {

    98             providers = new HashMap<IMobileWebRuntime, IApplicationLayoutProvider>();

    99             final IConfigurationElement[] configuration = Platform.getExtensionRegistry().getConfigurationElementsFor(

   100                     PreviewerPlugin.PLUGIN_ID, "layoutProviders");

   101             for (IConfigurationElement element : configuration) {

   102                 final String runtimeId = element.getAttribute("runtime-id");

   103                 final String version = element.getAttribute("runtime-version");

   104                 final IMobileWebRuntime runtime = TMWCore.getRuntimesManager().getRuntime(runtimeId, version);

   105                 if (runtime != null) {

   106                     providers.put(runtime, new LazyProvider(element));

   107                 } else {

   108                     PreviewerPlugin.log(String.format("Runtime %s:$s referenced from %s was not found", runtimeId,

   109                             version, element.getContributor().getName()), null);

   110                 }

   111             }

   112         }

   113     }

   114 }