| /******************************************************************************* |
| * Copyright (c) 2003, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.core.internal.runtime; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.util.ArrayList; |
| import java.util.Map; |
| import org.eclipse.core.runtime.IPath; |
| import org.eclipse.core.runtime.Path; |
| import org.osgi.framework.Bundle; |
| |
| // This class provides implements the find* methods exposed on Platform. |
| // It does the lookup in bundles and fragments and does the variable replacement. |
| public class FindSupport { |
| private static String[] NL_JAR_VARIANTS = buildNLVariants(InternalPlatform.getDefault().getNL()); |
| |
| private static String[] buildNLVariants(String nl) { |
| ArrayList result = new ArrayList(); |
| IPath base = new Path("nl"); //$NON-NLS-1$ |
| |
| IPath path = new Path(nl.replace('_', '/')); |
| while (path.segmentCount() > 0) { |
| result.add(base.append(path).toString()); |
| // for backwards compatibility only, don't replace the slashes |
| if (path.segmentCount() > 1) |
| result.add(base.append(path.toString().replace('/', '_')).toString()); |
| path = path.removeLastSegments(1); |
| } |
| |
| return (String[]) result.toArray(new String[result.size()]); |
| } |
| |
| /** |
| * See doc on @link Platform#find(Bundle, IPath) Platform#find(Bundle, IPath) |
| */ |
| public static URL find(Bundle bundle, IPath path) { |
| return find(bundle, path, null); |
| } |
| |
| /** |
| * See doc on @link Platform#find(Bundle, IPath, Map) Platform#find(Bundle, IPath, Map) |
| */ |
| public static URL find(Bundle b, IPath path, Map override) { |
| if (path == null) |
| return null; |
| |
| URL result = null; |
| |
| // Check for the empty or root case first |
| if (path.isEmpty() || path.isRoot()) { |
| // Watch for the root case. It will produce a new |
| // URL which is only the root directory (and not the |
| // root of this plugin). |
| result = findInPlugin(b, Path.EMPTY); |
| if (result == null) |
| result = findInFragments(b, Path.EMPTY); |
| return result; |
| } |
| |
| // Now check for paths without variable substitution |
| String first = path.segment(0); |
| if (first.charAt(0) != '$') { |
| result = findInPlugin(b, path); |
| if (result == null) |
| result = findInFragments(b, path); |
| return result; |
| } |
| |
| // Worry about variable substitution |
| IPath rest = path.removeFirstSegments(1); |
| if (first.equalsIgnoreCase("$nl$")) //$NON-NLS-1$ |
| return findNL(b, rest, override); |
| if (first.equalsIgnoreCase("$os$")) //$NON-NLS-1$ |
| return findOS(b, rest, override); |
| if (first.equalsIgnoreCase("$ws$")) //$NON-NLS-1$ |
| return findWS(b, rest, override); |
| if (first.equalsIgnoreCase("$files$")) //$NON-NLS-1$ |
| return null; |
| |
| return null; |
| } |
| |
| private static URL findOS(Bundle b, IPath path, Map override) { |
| String os = null; |
| if (override != null) |
| try { |
| // check for override |
| os = (String) override.get("$os$"); //$NON-NLS-1$ |
| } catch (ClassCastException e) { |
| // just in case |
| } |
| if (os == null) |
| // use default |
| os = InternalPlatform.getDefault().getOS(); |
| if (os.length() == 0) |
| return null; |
| |
| // Now do the same for osarch |
| String osArch = null; |
| if (override != null) |
| try { |
| // check for override |
| osArch = (String) override.get("$arch$"); //$NON-NLS-1$ |
| } catch (ClassCastException e) { |
| // just in case |
| } |
| if (osArch == null) |
| // use default |
| osArch = InternalPlatform.getDefault().getOSArch(); |
| if (osArch.length() == 0) |
| return null; |
| |
| URL result = null; |
| IPath base = new Path("os").append(os).append(osArch); //$NON-NLS-1$ |
| // Keep doing this until all you have left is "os" as a path |
| while (base.segmentCount() != 1) { |
| IPath filePath = base.append(path); |
| result = findInPlugin(b, filePath); |
| if (result != null) |
| return result; |
| result = findInFragments(b, filePath); |
| if (result != null) |
| return result; |
| base = base.removeLastSegments(1); |
| } |
| // If we get to this point, we haven't found it yet. |
| // Look in the plugin and fragment root directories |
| result = findInPlugin(b, path); |
| if (result != null) |
| return result; |
| return findInFragments(b, path); |
| } |
| |
| private static URL findWS(Bundle b, IPath path, Map override) { |
| String ws = null; |
| if (override != null) |
| try { |
| // check for override |
| ws = (String) override.get("$ws$"); //$NON-NLS-1$ |
| } catch (ClassCastException e) { |
| // just in case |
| } |
| if (ws == null) |
| // use default |
| ws = InternalPlatform.getDefault().getWS(); |
| IPath filePath = new Path("ws").append(ws).append(path); //$NON-NLS-1$ |
| // We know that there is only one segment to the ws path |
| // e.g. ws/win32 |
| URL result = findInPlugin(b, filePath); |
| if (result != null) |
| return result; |
| result = findInFragments(b, filePath); |
| if (result != null) |
| return result; |
| // If we get to this point, we haven't found it yet. |
| // Look in the plugin and fragment root directories |
| result = findInPlugin(b, path); |
| if (result != null) |
| return result; |
| return findInFragments(b, path); |
| } |
| |
| private static URL findNL(Bundle b, IPath path, Map override) { |
| String nl = null; |
| String[] nlVariants = null; |
| if (override != null) |
| try { |
| // check for override |
| nl = (String) override.get("$nl$"); //$NON-NLS-1$ |
| } catch (ClassCastException e) { |
| // just in case |
| } |
| nlVariants = nl == null ? NL_JAR_VARIANTS : buildNLVariants(nl); |
| if (nl != null && nl.length() == 0) |
| return null; |
| |
| URL result = null; |
| for (int i = 0; i < nlVariants.length; i++) { |
| IPath filePath = new Path(nlVariants[i]).append(path); |
| result = findInPlugin(b, filePath); |
| if (result != null) |
| return result; |
| result = findInFragments(b, filePath); |
| if (result != null) |
| return result; |
| } |
| // If we get to this point, we haven't found it yet. |
| // Look in the plugin and fragment root directories |
| result = findInPlugin(b, path); |
| if (result != null) |
| return result; |
| return findInFragments(b, path); |
| } |
| |
| private static URL findInPlugin(Bundle b, IPath filePath) { |
| return b.getEntry(filePath.toString()); |
| } |
| |
| private static URL findInFragments(Bundle b, IPath filePath) { |
| Bundle[] fragments = InternalPlatform.getDefault().getFragments(b); |
| if (fragments == null) |
| return null; |
| |
| URL fileURL = null; |
| int i = 0; |
| while (i < fragments.length && fileURL == null) { |
| fileURL = fragments[i].getEntry(filePath.toString()); |
| i++; |
| } |
| return fileURL; |
| } |
| |
| /** |
| * See doc on @link Platform#openStream(Bundle, IPath, boolean) Platform#Platform#openStream(Bundle, IPath, boolean) |
| */ |
| public static final InputStream openStream(Bundle bundle, IPath file, boolean localized) throws IOException { |
| URL url = null; |
| if (!localized) { |
| url = findInPlugin(bundle, file); |
| if (url == null) |
| url = findInFragments(bundle, file); |
| } else { |
| url = FindSupport.find(bundle, file); |
| } |
| if (url != null) |
| return url.openStream(); |
| throw new IOException("Cannot find " + file.toString()); //$NON-NLS-1$ |
| } |
| |
| } |