| /******************************************************************************* |
| * Copyright (c) 2006, 2008 IBM 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.validation.internal.delegates; |
| |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.IContributor; |
| import org.eclipse.core.runtime.IExtensionPoint; |
| import org.eclipse.core.runtime.IExtensionRegistry; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.osgi.util.NLS; |
| import org.eclipse.wst.validation.internal.ValMessages; |
| import org.eclipse.wst.validation.internal.plugin.ValidationPlugin; |
| |
| /** |
| * This class reads the plug-in extension registry and registers each delegating |
| * validator descriptor with the delegates registry. |
| * |
| * @see ValidatorDelegatesRegistry |
| */ |
| class ValidatorDelegatesRegistryReader { |
| /** |
| * The delegate class attribute. |
| */ |
| static final String CLASS_ATTRIBUTE = "class"; //$NON-NLS-1$ |
| |
| /** |
| * The delegate element name. |
| */ |
| private static final String DELEGATE_ELEMENT = "delegate"; //$NON-NLS-1$ |
| |
| /** |
| * The validator delegates extension point id. |
| */ |
| private static final String EXTENSION_POINT_ID = "validatorDelegates"; //$NON-NLS-1$ |
| |
| /** |
| * The delegate name attribute. |
| */ |
| private static final String NAME_ATTRIBUTE = "name"; //$NON-NLS-1$ |
| |
| private static final String PLUGIN_ID = "org.eclipse.wst.validation"; //$NON-NLS-1$ |
| |
| /** |
| * The target id attribute name. |
| */ |
| private static final String TARGET_ATTRIBUTE = "target"; //$NON-NLS-1$ |
| |
| /** |
| * The validator registry where the descriptors being read will be placed. |
| */ |
| private ValidatorDelegatesRegistry registry; |
| |
| /** |
| * Constructor. |
| * |
| * @param registry |
| * The registry where the descriptors being read will be placed. |
| */ |
| public ValidatorDelegatesRegistryReader(ValidatorDelegatesRegistry registry) { |
| this.registry = registry; |
| } |
| |
| /** |
| * Reads a configuration element. |
| * |
| * @param element |
| * The platform configuration element being read. |
| */ |
| private void readElement(IConfigurationElement element) { |
| String elementName = element.getName(); |
| |
| if (elementName.equals(DELEGATE_ELEMENT)) { |
| String delegateID = element.getAttribute(CLASS_ATTRIBUTE); |
| String delegateName = element.getAttribute(NAME_ATTRIBUTE); |
| String targetValidatorID = element.getAttribute(TARGET_ATTRIBUTE); |
| |
| ValidatorDelegateDescriptor descriptor = new ValidatorDelegateDescriptor( |
| delegateID, element, delegateName, targetValidatorID); |
| |
| registry.add(descriptor); |
| } |
| } |
| |
| /** |
| * Read from the extensions registry and parse it. |
| */ |
| void readRegistry() { |
| IExtensionRegistry pluginRegistry = Platform.getExtensionRegistry(); |
| IExtensionPoint point = pluginRegistry.getExtensionPoint(PLUGIN_ID, |
| EXTENSION_POINT_ID); |
| |
| if (point != null) { |
| IConfigurationElement[] elements = point.getConfigurationElements(); |
| for (IConfigurationElement configurationElement : elements) { |
| try { |
| readElement(configurationElement); |
| } catch (Exception e) { |
| // we don't want all the validators to be rendered helpless |
| // by some |
| // rogue contribution, so, we catch any exception that |
| // occurs during |
| // initialization, log it, and continue on. |
| IContributor contributor = configurationElement.getContributor(); |
| String msg = NLS.bind(ValMessages.RogueValidator, contributor); |
| ValidationPlugin.getPlugin().logMessage(IStatus.ERROR, msg); |
| } |
| } |
| } |
| } |
| } |