org.eclipse.ui.intro/src/org/eclipse/ui/internal/intro/impl/model/util/FindSupport.java - platform/eclipse.platform.ua - Git at Google

 /*******************************************************************************
  * Copyright (c) 2003, 2007 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.ui.internal.intro.impl.model.util;

 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;

 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.core.runtime.Platform;
 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(Platform.getNL());

 	private static String[] buildNLVariants(String nl) {
 		ArrayList<String> 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);
 	}

     /**
      * Proposed API for Platform in Eclispe 3.2.
      * Same as @link #find(Bundle, IPath) except multiple entries can be
      * returned if more than one entry matches the path in the host and
      * any of its fragments.
      *
      * @param bundle
      * @param path
      * @return an array of entries which match the given path.  An empty
      * array is returned if no matches are found.
      */
     public static URL[] findEntries(Bundle bundle, IPath path) {
         return findEntries(bundle, path, null);
     }

     /**
 	 * Proposed API for Platform in Eclipse 3.2. Same as @link #find(Bundle, IPath) except multiple
 	 * entries can be returned if more than one entry matches the path in the host and any of its
 	 * fragments.
 	 *
 	 * @param bundle
 	 * @param path
 	 * @param override
 	 * @return an array of entries which match the given path. An empty array is returned if no
 	 *         matches are found.
 	 */
 	public static URL[] findEntries(Bundle bundle, IPath path, Map<String, String> override) {
 		List<URL> results = new ArrayList<>(1);
         find(bundle, path, override, results);
         return (URL[]) results.toArray(new URL[results.size()]);
     }

 	/**
 	 * See doc on @link Platform#find(Bundle, IPath, Map) Platform#find(Bundle, IPath, Map)
 	 */
 	public static URL find(Bundle b, IPath path, Map<String, String> override) {
         return find(b, path, override, null);
     }

 	private static URL find(Bundle b, IPath path, Map<String, String> override, List<URL> multiple) {
 		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, multiple);
 			if (result == null || multiple != null)
 				result = findInFragments(b, Path.EMPTY, multiple);
             return result;
 		}

 		// Now check for paths without variable substitution
 		String first = path.segment(0);
 		if (first.charAt(0) != '$') {
 			result = findInPlugin(b, path, multiple);
 			if (result == null || multiple != null)
 				result = findInFragments(b, path, multiple);
             return result;
 		}

 		// Worry about variable substitution
 		IPath rest = path.removeFirstSegments(1);
 		if (first.equalsIgnoreCase("$nl$")) //$NON-NLS-1$
 			return findNL(b, rest, override, multiple);
 		if (first.equalsIgnoreCase("$os$")) //$NON-NLS-1$
 			return findOS(b, rest, override, multiple);
 		if (first.equalsIgnoreCase("$ws$")) //$NON-NLS-1$
 			return findWS(b, rest, override, multiple);
 		if (first.equalsIgnoreCase("$files$")) //$NON-NLS-1$
 			return null;

 		return null;
 	}

 	private static URL findOS(Bundle b, IPath path, Map<String, String> override, List<URL> multiple) {
 		String os = null;
 		if (override != null)
 			// check for override
 			os = override.get("$os$"); //$NON-NLS-1$
 		if (os == null)
 			// use default
 			os = Platform.getOS();
 		if (os.length() == 0)
 			return null;

 		// Now do the same for osarch
 		String osArch = null;
 		if (override != null)
 			// check for override
 			osArch = (String) override.get("$arch$"); //$NON-NLS-1$
 		if (osArch == null)
 			// use default
 			osArch = Platform.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, multiple);
 			if (result != null && multiple == null)
 				return result;
 			result = findInFragments(b, filePath, multiple);
 			if (result != null && multiple == 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, multiple);
 		if (result != null && multiple == null)
 			return result;
 		return findInFragments(b, path, multiple);
 	}

 	private static URL findWS(Bundle b, IPath path, Map<String, String> override, List<URL> multiple) {
 		String ws = null;
 		if (override != null)
 			// check for override
 			ws = override.get("$ws$"); //$NON-NLS-1$
 		if (ws == null)
 			// use default
 			ws = Platform.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, multiple);
 		if (result != null && multiple == null)
 			return result;
 		result = findInFragments(b, filePath, multiple);
 		if (result != null && multiple == 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, multiple);
 		if (result != null && multiple == null)
 			return result;
 		return findInFragments(b, path, multiple);
 	}

 	private static URL findNL(Bundle b, IPath path, Map<String, String> override, List<URL> multiple) {
 		String nl = null;
 		String[] nlVariants = null;
 		if (override != null)
 			// check for override
 			nl = override.get("$nl$"); //$NON-NLS-1$
 		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, multiple);
 			if (result != null && multiple == null)
 				return result;
 			result = findInFragments(b, filePath, multiple);
 			if (result != null && multiple == 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, multiple);
 		if (result != null && multiple == null)
 			return result;
 		return findInFragments(b, path, multiple);
 	}

 	private static URL findInPlugin(Bundle b, IPath filePath, List<URL> multiple) {
 		URL result = b.getEntry(filePath.toString());
         if (result != null && multiple != null)
             multiple.add(result);
         return result;
 	}

 	private static URL findInFragments(Bundle b, IPath filePath, List<URL> multiple) {
 		Bundle[] fragments = Platform.getFragments(b);
 		if (fragments == null)
 			return null;

 		// multiple.ensureCapacity(fragments.length + 1);
 		URL fileURL = null;
 		int i = 0;
 		while (i < fragments.length && fileURL == null) {
 			fileURL = fragments[i].getEntry(filePath.toString());
             if (fileURL != null && multiple != null) {
                 multiple.add(fileURL);
                 fileURL = null;
             }
 			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, null);
 			if (url == null)
 				url = findInFragments(bundle, file, null);
 		} else {
 			url = FindSupport.find(bundle, file);
 		}
 		if (url != null)
 			return url.openStream();
 		throw new IOException("Cannot find " + file.toString()); //$NON-NLS-1$
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2003, 2007 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.ui.internal.intro.impl.model.util;

	import java.io.IOException;
	import java.io.InputStream;
	import java.net.URL;
	import java.util.ArrayList;
	import java.util.List;
	import java.util.Map;

	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.core.runtime.Platform;
	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(Platform.getNL());

	private static String[] buildNLVariants(String nl) {
	ArrayList<String> 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);
	}

	/**
	* Proposed API for Platform in Eclispe 3.2.
	* Same as @link #find(Bundle, IPath) except multiple entries can be
	* returned if more than one entry matches the path in the host and
	* any of its fragments.
	*
	* @param bundle
	* @param path
	* @return an array of entries which match the given path. An empty
	* array is returned if no matches are found.
	*/
	public static URL[] findEntries(Bundle bundle, IPath path) {
	return findEntries(bundle, path, null);
	}

	/**
	* Proposed API for Platform in Eclipse 3.2. Same as @link #find(Bundle, IPath) except multiple
	* entries can be returned if more than one entry matches the path in the host and any of its
	* fragments.
	*
	* @param bundle
	* @param path
	* @param override
	* @return an array of entries which match the given path. An empty array is returned if no
	* matches are found.
	*/
	public static URL[] findEntries(Bundle bundle, IPath path, Map<String, String> override) {
	List<URL> results = new ArrayList<>(1);
	find(bundle, path, override, results);
	return (URL[]) results.toArray(new URL[results.size()]);
	}

	/**
	* See doc on @link Platform#find(Bundle, IPath, Map) Platform#find(Bundle, IPath, Map)
	*/
	public static URL find(Bundle b, IPath path, Map<String, String> override) {
	return find(b, path, override, null);
	}

	private static URL find(Bundle b, IPath path, Map<String, String> override, List<URL> multiple) {
	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, multiple);
	if (result == null \|\| multiple != null)
	result = findInFragments(b, Path.EMPTY, multiple);
	return result;
	}

	// Now check for paths without variable substitution
	String first = path.segment(0);
	if (first.charAt(0) != '$') {
	result = findInPlugin(b, path, multiple);
	if (result == null \|\| multiple != null)
	result = findInFragments(b, path, multiple);
	return result;
	}

	// Worry about variable substitution
	IPath rest = path.removeFirstSegments(1);
	if (first.equalsIgnoreCase("$nl$")) //$NON-NLS-1$
	return findNL(b, rest, override, multiple);
	if (first.equalsIgnoreCase("$os$")) //$NON-NLS-1$
	return findOS(b, rest, override, multiple);
	if (first.equalsIgnoreCase("$ws$")) //$NON-NLS-1$
	return findWS(b, rest, override, multiple);
	if (first.equalsIgnoreCase("$files$")) //$NON-NLS-1$
	return null;

	return null;
	}

	private static URL findOS(Bundle b, IPath path, Map<String, String> override, List<URL> multiple) {
	String os = null;
	if (override != null)
	// check for override
	os = override.get("$os$"); //$NON-NLS-1$
	if (os == null)
	// use default
	os = Platform.getOS();
	if (os.length() == 0)
	return null;

	// Now do the same for osarch
	String osArch = null;
	if (override != null)
	// check for override
	osArch = (String) override.get("$arch$"); //$NON-NLS-1$
	if (osArch == null)
	// use default
	osArch = Platform.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, multiple);
	if (result != null && multiple == null)
	return result;
	result = findInFragments(b, filePath, multiple);
	if (result != null && multiple == 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, multiple);
	if (result != null && multiple == null)
	return result;
	return findInFragments(b, path, multiple);
	}

	private static URL findWS(Bundle b, IPath path, Map<String, String> override, List<URL> multiple) {
	String ws = null;
	if (override != null)
	// check for override
	ws = override.get("$ws$"); //$NON-NLS-1$
	if (ws == null)
	// use default
	ws = Platform.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, multiple);
	if (result != null && multiple == null)
	return result;
	result = findInFragments(b, filePath, multiple);
	if (result != null && multiple == 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, multiple);
	if (result != null && multiple == null)
	return result;
	return findInFragments(b, path, multiple);
	}

	private static URL findNL(Bundle b, IPath path, Map<String, String> override, List<URL> multiple) {
	String nl = null;
	String[] nlVariants = null;
	if (override != null)
	// check for override
	nl = override.get("$nl$"); //$NON-NLS-1$
	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, multiple);
	if (result != null && multiple == null)
	return result;
	result = findInFragments(b, filePath, multiple);
	if (result != null && multiple == 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, multiple);
	if (result != null && multiple == null)
	return result;
	return findInFragments(b, path, multiple);
	}

	private static URL findInPlugin(Bundle b, IPath filePath, List<URL> multiple) {
	URL result = b.getEntry(filePath.toString());
	if (result != null && multiple != null)
	multiple.add(result);
	return result;
	}

	private static URL findInFragments(Bundle b, IPath filePath, List<URL> multiple) {
	Bundle[] fragments = Platform.getFragments(b);
	if (fragments == null)
	return null;

	// multiple.ensureCapacity(fragments.length + 1);
	URL fileURL = null;
	int i = 0;
	while (i < fragments.length && fileURL == null) {
	fileURL = fragments[i].getEntry(filePath.toString());
	if (fileURL != null && multiple != null) {
	multiple.add(fileURL);
	fileURL = null;
	}
	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, null);
	if (url == null)
	url = findInFragments(bundle, file, null);
	} else {
	url = FindSupport.find(bundle, file);
	}
	if (url != null)
	return url.openStream();
	throw new IOException("Cannot find " + file.toString()); //$NON-NLS-1$
	}

	}