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Diffstat (limited to 'plugins/org.eclipse.sirius.diagram/src-core/org/eclipse/sirius/diagram/business/api/diagramtype/DiagramTypeDescriptorRegistry.java')
| -rw-r--r-- | plugins/org.eclipse.sirius.diagram/src-core/org/eclipse/sirius/diagram/business/api/diagramtype/DiagramTypeDescriptorRegistry.java | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/plugins/org.eclipse.sirius.diagram/src-core/org/eclipse/sirius/diagram/business/api/diagramtype/DiagramTypeDescriptorRegistry.java b/plugins/org.eclipse.sirius.diagram/src-core/org/eclipse/sirius/diagram/business/api/diagramtype/DiagramTypeDescriptorRegistry.java deleted file mode 100644 index e2de919338..0000000000 --- a/plugins/org.eclipse.sirius.diagram/src-core/org/eclipse/sirius/diagram/business/api/diagramtype/DiagramTypeDescriptorRegistry.java +++ /dev/null @@ -1,198 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2009, 2015 THALES GLOBAL SERVICES. - * This program and the accompanying materials - * are made available under the terms of the Eclipse Public License 2.0 - * which accompanies this distribution, and is available at - * https://www.eclipse.org/legal/epl-2.0/ - * - * SPDX-License-Identifier: EPL-2.0 - * - * Contributors: - * Obeo - initial API and implementation - *******************************************************************************/ -package org.eclipse.sirius.diagram.business.api.diagramtype; - -import java.text.MessageFormat; -import java.util.Collection; -import java.util.Collections; -import java.util.HashSet; - -import org.eclipse.core.runtime.CoreException; -import org.eclipse.core.runtime.IConfigurationElement; -import org.eclipse.core.runtime.IExtension; -import org.eclipse.core.runtime.IExtensionPoint; -import org.eclipse.core.runtime.IExtensionRegistry; -import org.eclipse.core.runtime.Platform; -import org.eclipse.sirius.diagram.Messages; -import org.eclipse.sirius.viewpoint.SiriusPlugin; - -/** - * Registry for all diagram types. - * <p> - * Warning: This class implements a NON thread safe singleton. You have to - * synchronize calls if you use the shared instance in a multi threads - * environment. - * </p> - * - * @author ymortier - */ -public final class DiagramTypeDescriptorRegistry { - - /** Diagram type extension point ID. */ - private static final String DIAGRAM_TYPE_EP_ID = "org.eclipse.sirius.diagram.diagramTypeProvider"; //$NON-NLS-1$ - - /** The diagram description provider attribute. */ - private static final String DIAGRAM_DESCRIPTION_PROVIDER_ATTR = "descriptionProvider"; //$NON-NLS-1$ - - /** The label attribute. */ - private static final String LABEL_ATTRIBUTE = "label"; //$NON-NLS-1$ - - private static DiagramTypeDescriptorRegistry instance; - - /** All providers. */ - private Collection<IDiagramTypeDescriptor> allProviders; - - /** - * Avoid instantiation from external. - */ - private DiagramTypeDescriptorRegistry() { - // empty. - } - - /** - * Returns the shared instance. - * - * @return the shared instance. - */ - public static DiagramTypeDescriptorRegistry getInstance() { - if (instance == null) { - instance = new DiagramTypeDescriptorRegistry(); - } - return instance; - } - - /** - * Returns all diagram type descriptors. The returned collection is - * unmodifiable. All attempts to modify the result will fail with a - * {@link UnsupportedOperationException}. - * - * @return all diagram type descriptors (the returned collection is - * unmodifiable). - */ - public Collection<IDiagramTypeDescriptor> getAllDiagramTypeDescriptors() { - return Collections.unmodifiableCollection(this.internalGetAllDiagramTypeDescriptors()); - } - - /** - * Registers the given diagram type descriptors. - * - * @param diagramTypeDescriptor - * the diagram type descriptors to register. - */ - public void registerDiagramTypeDescriptor(final IDiagramTypeDescriptor diagramTypeDescriptor) { - this.internalGetAllDiagramTypeDescriptors().add(diagramTypeDescriptor); - } - - /** - * Unregsiters the given diagram type descriptors. - * - * @param diagramTypeDescriptor - * the diagram type descriptors to register. - */ - public void unregisterDiagramTypeDescriptor(final IDiagramTypeDescriptor diagramTypeDescriptor) { - this.internalGetAllDiagramTypeDescriptors().remove(diagramTypeDescriptor); - } - - /** - * Returns all descriptors. Lazy loads the desciptor that used the - * diagramDescriptionProvider extension point. - * - * @return all descriptors. - */ - private Collection<IDiagramTypeDescriptor> internalGetAllDiagramTypeDescriptors() { - if (this.allProviders == null) { - this.allProviders = new HashSet<IDiagramTypeDescriptor>(); - this.loadDescriptors(); - } - return this.allProviders; - } - - /** - * Load descriptors from plugin. - */ - private void loadDescriptors() { - final IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry(); - final IExtensionPoint ep = extensionRegistry.getExtensionPoint(DIAGRAM_TYPE_EP_ID); - for (final IExtension extension : ep.getExtensions()) { - final IConfigurationElement[] ces = extension.getConfigurationElements(); - for (final IConfigurationElement ce : ces) { - try { - final Object provider = ce.createExecutableExtension(DIAGRAM_DESCRIPTION_PROVIDER_ATTR); - if (provider instanceof IDiagramDescriptionProvider) { - final String label = ce.getAttribute(LABEL_ATTRIBUTE); - final IDiagramTypeDescriptor descriptor = new PluginDiagramTypeDescriptor(label, (IDiagramDescriptionProvider) provider); - allProviders.add(descriptor); - } else { - SiriusPlugin.getDefault().error(MessageFormat.format(Messages.DiagramTypeDescriptorRegistry_loadingErrorMsg, extension.getLabel()), new ClassCastException()); - } - } catch (final CoreException e) { - SiriusPlugin.getDefault().error(MessageFormat.format(Messages.DiagramTypeDescriptorRegistry_loadingErrorMsg, extension.getLabel()), e); - SiriusPlugin.getDefault().getLog().log(e.getStatus()); - } - } - } - } - - /** - * Basic implementation of {@link IDiagramTypeDescriptor} for the - * diagramType extension. - * - * @author ymortier - */ - private static class PluginDiagramTypeDescriptor implements IDiagramTypeDescriptor { - - /** The label of the diagram type. */ - private String label; - - /** The Diagram Description provider. */ - private IDiagramDescriptionProvider diagramDescriptionProvider; - - /** - * Creates a new diagram type descriptor with the given label and - * diagram description provider. - * - * @param label - * the label of the diagram type. - * @param diagramDescriptionProvider - * the diagram description provider. - * @throws IllegalArgumentException - * if one of the arguments is <code>null</code>. - */ - PluginDiagramTypeDescriptor(final String label, final IDiagramDescriptionProvider diagramDescriptionProvider) throws IllegalArgumentException { - this.label = label; - this.diagramDescriptionProvider = diagramDescriptionProvider; - } - - /** - * {@inheritDoc} - * - * @see org.eclipse.sirius.diagram.business.api.diagramtype.IDiagramTypeDescriptor#getDiagramDescriptionProvider() - */ - @Override - public IDiagramDescriptionProvider getDiagramDescriptionProvider() { - return this.diagramDescriptionProvider; - } - - /** - * {@inheritDoc} - * - * @see org.eclipse.sirius.diagram.business.api.diagramtype.IDiagramTypeDescriptor#getLabel() - */ - @Override - public String getLabel() { - return label; - } - - } - -} |