| /******************************************************************************* |
| * Copyright (c) 2001, 2007 Oracle Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Oracle Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jst.pagedesigner.itemcreation.internal; |
| |
| |
| /** |
| * A registry reader that lazy initializes a list of uri-sensitive |
| * extensions |
| * |
| * @author cbateman |
| * |
| */ |
| public final class TagCreatorFactoryRegistryReader |
| { |
| // TODO: move this logic into the ElementEditFacRegistryReader |
| // private static Map<String, List<ITagCreatorFactory>> _handlers = null; |
| // |
| // /** |
| // * @param uri the uri to get a list of factories for |
| // * @return all available handers for the ext-pt |
| // */ |
| // public static synchronized List<ITagCreatorFactory> getAllHandlers(final String uri) |
| // { |
| // if (_handlers == null) { |
| // _handlers = readAllHandlers(); |
| // } |
| // return _handlers.get(uri); |
| // } |
| // |
| // private static Map<String, List<ITagCreatorFactory>> readAllHandlers() |
| // { |
| // final Map<String, List<ExtElement>> map = |
| // new HashMap<String, List<ExtElement>>(); |
| // |
| // IExtensionPoint extensionPoint = Platform.getExtensionRegistry() |
| // .getExtensionPoint(PDPlugin.getPluginId(), |
| // IJMTConstants.TAG_CREATOR_FACTORY_EXT_NAME); |
| // IExtension[] extensions = extensionPoint.getExtensions(); |
| // |
| // for (int i = 0; i < extensions.length; i++) |
| // { |
| // IExtension ext = extensions[i]; |
| // IConfigurationElement[] tagCreationHandlers = ext |
| // .getConfigurationElements(); |
| // |
| // for (int j = 0; j < tagCreationHandlers.length; j++) { |
| // if (tagCreationHandlers[j].getName().equals( |
| // IJMTConstants.TAG_CREATOR_FACTORY_ELEMENT_NAME)) |
| // { |
| // try |
| // { |
| // final ExtElement extElement = |
| // new ExtElement(tagCreationHandlers[j]); |
| // List<ExtElement> elements = |
| // map.get(extElement.getUri()); |
| // |
| // if (elements == null) |
| // { |
| // elements = new ArrayList<ExtElement>(); |
| // map.put(extElement.getUri(), elements); |
| // } |
| // |
| // elements.add(extElement); |
| // } |
| // catch (CoreException ce) |
| // { |
| // PDPlugin.getLogger(ExtElement.class) |
| // .error("Error.ProblemLoadingExtensionPoint", ce); |
| // } |
| // } |
| // } |
| // } |
| // |
| // final Map<String, List<ITagCreatorFactory>> handlers = |
| // new HashMap<String, List<ITagCreatorFactory>>(); |
| // |
| // // now loop through the extensions, looking for collisions |
| // // on the same uri |
| // for (String uri : map.keySet()) |
| // { |
| // List<ExtElement> elements = map.get(uri); |
| // |
| // if (elements.size() > 1) |
| // { |
| // Collections.sort(elements); |
| // |
| // MultiStatus chainedStatus = new MultiStatus(PDPlugin.getPluginId(), 0, "Collision detected in ITagCreatorFactory extensions for uri: "+uri+". Factories will be queried in the following order with the first contender to provide a ITagCreator winning", |
| // new Throwable()); |
| // |
| // for (ExtElement element : elements) |
| // { |
| // IStatus status = |
| // new Status(IStatus.WARNING, PDPlugin.getPluginId(), element.getClassName()); |
| // chainedStatus.add(status); |
| // } |
| // |
| // PDPlugin.log(chainedStatus); |
| // } |
| // |
| // List<ITagCreatorFactory> factories = |
| // new ArrayList<ITagCreatorFactory>(); |
| // |
| // for (ExtElement element : elements) |
| // { |
| // factories.add(element.getFactoryInstance()); |
| // } |
| // |
| // handlers.put(uri, factories); |
| // } |
| // |
| // return handlers; |
| // } |
| // |
| // private static class ExtElement implements Comparable<ExtElement> |
| // { |
| // private final IConfigurationElement _element; |
| // |
| // private final ITagCreatorFactory _factoryInstance; |
| // |
| // ExtElement(IConfigurationElement element) throws CoreException |
| // { |
| // _element = element; |
| // |
| // final String uri = getUri(); |
| // final String factory = getClassName(); |
| // |
| // if (uri == null || factory == null) |
| // { |
| // throw new CoreException(new Status(IStatus.ERROR,PDPlugin.getPluginId(), "uri and factory must not be null: uri="+uri+", factory="+factory)); |
| // } |
| // |
| // Object obj = _element.createExecutableExtension("factory"); |
| // |
| // if (obj instanceof ITagCreatorFactory) |
| // { |
| // _factoryInstance = (ITagCreatorFactory) obj; |
| // } |
| // else |
| // { |
| // throw new CoreException(new Status(IStatus.ERROR,PDPlugin.getPluginId(), "Factory must be instanceof ITagCreatorFactory")); |
| // } |
| // } |
| // |
| // /** |
| // * @return the uri |
| // */ |
| // public String getUri() { |
| // return _element.getAttribute("uri"); |
| // } |
| // |
| // /** |
| // * @return the class name |
| // */ |
| // public String getClassName() { |
| // return _element.getAttribute("factory"); |
| // } |
| // |
| // /** |
| // * @return the factory instance or null |
| // */ |
| // public ITagCreatorFactory getFactoryInstance() |
| // { |
| // return _factoryInstance; |
| // } |
| // |
| // /* |
| // * Two elements compare by the canonical comparision of their |
| // * contributor's bundle name string |
| // */ |
| // public int compareTo(ExtElement o) |
| // { |
| // return _element.getContributor().getName().compareTo |
| // (o._element.getContributor().getName()); |
| // } |
| // |
| // @Override |
| // public boolean equals(Object obj) |
| // { |
| // // ensure that x.equals(y) iff x.compareTo(y) == 0 |
| // if (obj instanceof ExtElement) |
| // { |
| // return compareTo((ExtElement) obj) == 0; |
| // } |
| // |
| // return false; |
| // } |
| // |
| // @Override |
| // public int hashCode() |
| // { |
| // // ensure that x.equals(y) => x.hashCode == y.hashCode |
| // return _element.getContributor().getName().hashCode(); |
| // } |
| // } |
| } |
