| /******************************************************************************* |
| * Copyright (c) 2006, 2016 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.help.internal.index; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.IExtensionRegistry; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.help.AbstractIndexProvider; |
| import org.eclipse.help.IIndexContribution; |
| import org.eclipse.help.internal.HelpPlugin; |
| import org.eclipse.help.internal.util.ResourceLocator; |
| import org.xml.sax.SAXParseException; |
| |
| /* |
| * Provides index data from index XML files to the help system. |
| */ |
| public class IndexFileProvider extends AbstractIndexProvider { |
| |
| private static final String ERROR_READING_HELP_KEYWORD_INDEX_FILE = "Error reading help keyword index file /\""; //$NON-NLS-1$ |
| public static final String EXTENSION_POINT_ID_INDEX = HelpPlugin.PLUGIN_ID + ".index"; //$NON-NLS-1$ |
| public static final String ELEMENT_NAME_INDEX = "index"; //$NON-NLS-1$ |
| public static final String ATTRIBUTE_NAME_FILE = "file"; //$NON-NLS-1$ |
| |
| @Override |
| public IIndexContribution[] getIndexContributions(String locale) { |
| List<IIndexContribution> contributions = new ArrayList<>(); |
| IndexFile[] indexFiles = getIndexFiles(locale); |
| IndexFileParser parser = new IndexFileParser(); |
| for (int i=0;i<indexFiles.length;++i) { |
| IndexFile indexFile = indexFiles[i]; |
| try { |
| IIndexContribution toc = parser.parse(indexFile); |
| contributions.add(toc); |
| } catch (SAXParseException spe) { |
| StringBuilder buffer = new StringBuilder(ERROR_READING_HELP_KEYWORD_INDEX_FILE); |
| buffer.append(getIndexFilePath(indexFile)); |
| buffer.append("\" at line "); //$NON-NLS-1$ |
| buffer.append(spe.getLineNumber()); |
| buffer.append(". "); //$NON-NLS-1$ |
| buffer.append(spe.getMessage()); |
| |
| // Use the contained exception. |
| Exception x = spe; |
| if (spe.getException() != null) |
| x = spe.getException(); |
| HelpPlugin.logError(buffer.toString(), x); |
| |
| } |
| catch (Throwable t) { |
| String msg = ERROR_READING_HELP_KEYWORD_INDEX_FILE + getIndexFilePath(indexFile) + "\" (skipping file)"; //$NON-NLS-1$ |
| HelpPlugin.logError(msg, t); |
| } |
| } |
| return contributions.toArray(new IIndexContribution[contributions.size()]); |
| } |
| |
| private String getIndexFilePath(IndexFile indexFile) { |
| String pluginId = indexFile.getPluginId(); |
| String file = indexFile.getFile(); |
| return ResourceLocator.getErrorPath(pluginId, file, indexFile.getLocale()); |
| } |
| |
| /* |
| * Returns all available IndexFiles for the given locale. |
| */ |
| private IndexFile[] getIndexFiles(String locale) { |
| List<IndexFile> indexFiles = new ArrayList<>(); |
| IExtensionRegistry registry = Platform.getExtensionRegistry(); |
| IConfigurationElement[] elements = registry.getConfigurationElementsFor(EXTENSION_POINT_ID_INDEX); |
| for (int i=0;i<elements.length;++i) { |
| IConfigurationElement elem = elements[i]; |
| String pluginId = elem.getContributor().getName(); |
| if (elem.getName().equals(ELEMENT_NAME_INDEX)) { |
| String file = elem.getAttribute(ATTRIBUTE_NAME_FILE); |
| IndexFile indexFile = new IndexFile(pluginId, file, locale); |
| indexFiles.add(indexFile); |
| } |
| } |
| return indexFiles.toArray(new IndexFile[indexFiles.size()]); |
| } |
| } |