| /******************************************************************************* |
| * Copyright (c) 2010 BSI Business Systems Integration AG. |
| * 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: |
| * BSI Business Systems Integration AG - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.scout.sdk.ui.internal.extensions; |
| |
| import java.util.HashMap; |
| import java.util.TreeMap; |
| |
| 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.scout.commons.CompositeObject; |
| import org.eclipse.scout.sdk.ui.extensions.ICodeIdParser; |
| import org.eclipse.scout.sdk.ui.extensions.ICodeIdProvider; |
| import org.eclipse.scout.sdk.ui.internal.ScoutSdkUi; |
| import org.eclipse.scout.sdk.util.internal.sigcache.SignatureCache; |
| import org.eclipse.scout.sdk.workspace.IScoutBundle; |
| |
| public final class CodeIdExtensionPoint { |
| |
| private final static String EXTENSION_POINT_NAME = "codeId"; |
| private final static String CODE_ID_PROVIDER_EXT_NAME = "codeIdProvider"; |
| private final static String CODE_ID_PARSER_EXT_NAME = "codeIdParser"; |
| private final static String ATTRIB_CLASS = "class"; |
| private final static String ATTRIB_GENERIC_TYPE = "genericType"; |
| private final static String ATTRIB_PRIO = "priority"; |
| |
| private final static Object codeIdProviderExtensionsCacheLock = new Object(); |
| private static volatile ICodeIdProvider[] codeIdProviderExtensions; |
| |
| private final static Object codeIdParsersExtensionsCacheLock = new Object(); |
| private static HashMap<String, TreeMap<CompositeObject, ICodeIdParser>> codeIdParsers; |
| |
| private CodeIdExtensionPoint() { |
| } |
| |
| /** |
| * @return all extensions in the prioritized order. |
| */ |
| private static ICodeIdProvider[] getCodeIdProviderExtensions() { |
| synchronized (codeIdProviderExtensionsCacheLock) { |
| if (codeIdProviderExtensions == null) { |
| TreeMap<CompositeObject, ICodeIdProvider> providers = new TreeMap<CompositeObject, ICodeIdProvider>(); |
| IExtensionRegistry reg = Platform.getExtensionRegistry(); |
| IExtensionPoint xp = reg.getExtensionPoint(ScoutSdkUi.PLUGIN_ID, EXTENSION_POINT_NAME); |
| IExtension[] extensions = xp.getExtensions(); |
| for (IExtension extension : extensions) { |
| IConfigurationElement[] providerElememts = extension.getConfigurationElements(); |
| for (int i = 0; i < providerElememts.length; i++) { |
| IConfigurationElement providerElememt = providerElememts[i]; |
| if (CODE_ID_PROVIDER_EXT_NAME.equals(providerElememt.getName())) { |
| String className = providerElememt.getAttribute(ATTRIB_CLASS); |
| |
| ScoutSdkUi.logInfo("found code id provider: " + className); |
| try { |
| ICodeIdProvider provider = (ICodeIdProvider) providerElememt.createExecutableExtension(ATTRIB_CLASS); |
| providers.put(new CompositeObject(getPriority(providerElememt), i, provider), provider); |
| } |
| catch (Throwable t) { |
| ScoutSdkUi.logError("register code id provider: " + className, t); |
| } |
| } |
| } |
| } |
| codeIdProviderExtensions = providers.values().toArray(new ICodeIdProvider[providers.size()]); |
| } |
| } |
| return codeIdProviderExtensions; |
| } |
| |
| private static int getPriority(IConfigurationElement element) { |
| int priority = 0; |
| try { |
| String prio = element.getAttribute(ATTRIB_PRIO); |
| priority = Integer.MAX_VALUE - Integer.parseInt(prio); /* descending order: highest prio first */ |
| } |
| catch (Exception e) { |
| ScoutSdkUi.logWarning("could not parse priority of " + EXTENSION_POINT_NAME + " extension '" + element.getName() + "'", e); |
| } |
| return priority; |
| } |
| |
| private static HashMap<String, TreeMap<CompositeObject, ICodeIdParser>> getCodeIdParsers() { |
| synchronized (codeIdParsersExtensionsCacheLock) { |
| if (codeIdParsers == null) { |
| HashMap<String, TreeMap<CompositeObject, ICodeIdParser>> parsers = new HashMap<String, TreeMap<CompositeObject, ICodeIdParser>>(); |
| IExtensionRegistry reg = Platform.getExtensionRegistry(); |
| IExtensionPoint xp = reg.getExtensionPoint(ScoutSdkUi.PLUGIN_ID, EXTENSION_POINT_NAME); |
| IExtension[] extensions = xp.getExtensions(); |
| for (IExtension extension : extensions) { |
| IConfigurationElement[] codeIdElements = extension.getConfigurationElements(); |
| for (int i = 0; i < codeIdElements.length; i++) { |
| IConfigurationElement parserElememt = codeIdElements[i]; |
| if (CODE_ID_PARSER_EXT_NAME.equals(parserElememt.getName())) { |
| String className = parserElememt.getAttribute(ATTRIB_CLASS); |
| String genericTypeSignature = SignatureCache.createTypeSignature(parserElememt.getAttribute(ATTRIB_GENERIC_TYPE)); |
| int prio = getPriority(parserElememt); |
| ScoutSdkUi.logInfo("found code id parser: " + className); |
| |
| try { |
| ICodeIdParser parser = (ICodeIdParser) parserElememt.createExecutableExtension(ATTRIB_CLASS); |
| TreeMap<CompositeObject, ICodeIdParser> typeParsers = parsers.get(genericTypeSignature); |
| if (typeParsers == null) { |
| typeParsers = new TreeMap<CompositeObject, ICodeIdParser>(); |
| parsers.put(genericTypeSignature, typeParsers); |
| } |
| typeParsers.put(new CompositeObject(prio, i, parser), parser); |
| } |
| catch (Throwable t) { |
| ScoutSdkUi.logError("register code id parser: " + className, t); |
| } |
| } |
| } |
| } |
| codeIdParsers = parsers; |
| } |
| return codeIdParsers; |
| } |
| } |
| |
| public static ICodeIdParser getCodeIdParser(String genericType) { |
| TreeMap<CompositeObject, ICodeIdParser> parsers = getCodeIdParsers().get(genericType); |
| if (parsers != null && parsers.size() > 0) { |
| return parsers.values().iterator().next(); |
| } |
| return null; |
| } |
| |
| public static String getNextCodeId(IScoutBundle projectGroup, String genericSignature) { |
| String value = null; |
| ICodeIdProvider[] providers = getCodeIdProviderExtensions(); |
| for (ICodeIdProvider p : providers) { |
| try { |
| value = p.getNextId(projectGroup, genericSignature); |
| if (value != null) { |
| break; |
| } |
| } |
| catch (Throwable e) { |
| ScoutSdkUi.logWarning("Exception in codeIdExtension '" + p.getClass().getName() + "'", e); |
| } |
| } |
| return value; |
| } |
| } |