| /******************************************************************************* |
| * Copyright (c) 2005, 2007 BEA Systems, Inc. |
| * 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: |
| * tyeung@bea.com - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.apt.core.internal.util; |
| |
| import java.io.BufferedOutputStream; |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import org.eclipse.core.resources.IContainer; |
| import org.eclipse.core.resources.IFile; |
| import org.eclipse.core.resources.IFolder; |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.resources.ResourcesPlugin; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.jdt.apt.core.internal.AptPlugin; |
| |
| /** |
| * Simple utility class to encapsulate an mkdirs() that avoids a timing issue |
| * in the jdk. |
| */ |
| public final class FileSystemUtil |
| { |
| private FileSystemUtil() {} |
| |
| /** |
| * If the given resource is a folder, then recursively deleted all derived |
| * files and folders contained within it. Delete the folder if it becomes empty |
| * and if itself is also a derived resource. |
| * If the given resource is a file, delete it iff it is a derived resource. |
| * The resource is left untouched if it is no a folder or a file. |
| * @param resource |
| * @return <code>true</code> iff the resource has been deleted. |
| * @throws CoreException |
| */ |
| public static boolean deleteDerivedResources(final IResource resource) |
| throws CoreException |
| { |
| if (null == resource) { |
| return false; |
| } |
| if( resource.getType() == IResource.FOLDER ){ |
| boolean deleteFolder = resource.isDerived(); |
| IResource[] members = ((IFolder)resource).members(); |
| for( int i=0, len=members.length; i<len; i++ ){ |
| deleteFolder &= deleteDerivedResources(members[i]); |
| } |
| if( deleteFolder ){ |
| deleteResource(resource); |
| return true; |
| } |
| return false; |
| } |
| else if( resource.getType() == IResource.FILE ){ |
| if( resource.isDerived() ){ |
| deleteResource(resource); |
| return true; |
| } |
| return false; |
| } |
| // will skip pass everything else. |
| else |
| return false; |
| } |
| |
| /** |
| * Delete a resource without throwing an exception. |
| */ |
| private static void deleteResource(IResource resource) { |
| try { |
| resource.delete(true, null); |
| } catch (CoreException e) { |
| // might have been concurrently deleted |
| if (resource.exists()) { |
| AptPlugin.log(e, "Unable to delete derived resource " + resource); //$NON-NLS-1$ |
| } |
| } |
| } |
| |
| public static void mkdirs( File parent ) |
| { |
| if ( parent == null ) |
| return; |
| |
| // It is necessary to synchronize to prevent timing issues while creating the parent directories |
| // We can be codegening multiple files that go into the same directory at the same time. |
| synchronized (FileSystemUtil.class) { |
| if (!parent.exists()) { |
| boolean succeed = false; |
| for (int i = 0 ; !succeed && i < 5 ; i++) |
| succeed = parent.mkdirs(); |
| } |
| } |
| } |
| |
| public static void makeDerivedParentFolders (IContainer container) throws CoreException { |
| // synchronize the "does it exist - if not, create it" sequence. |
| if ((container instanceof IFolder) && !container.exists()) { |
| makeDerivedParentFolders(container.getParent()); |
| try { |
| ((IFolder)container).create(true, true, null); |
| } |
| catch (CoreException e) { |
| // Ignore race condition where another thread created the folder at the |
| // same time, causing checkDoesNotExist() to throw within create(). |
| if (!container.exists()) { |
| throw e; |
| } |
| } |
| container.setDerived(true); |
| } |
| } |
| |
| /** |
| * Returns the contents of a file as a string in UTF8 format |
| */ |
| public static String getContentsOfIFile(IFile file) throws IOException, CoreException { |
| return getContents(file.getContents(true)); |
| } |
| |
| public static String getContentsOfFile(File file) throws IOException { |
| return getContents(new FileInputStream(file)); |
| } |
| |
| private static String getContents(InputStream in) throws IOException { |
| try { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| byte[] buffer = new byte[512]; |
| int len; |
| while ((len = in.read(buffer)) > 0) { |
| out.write(buffer, 0, len); |
| } |
| out.close(); |
| String s = new String(out.toByteArray(), "UTF8"); //$NON-NLS-1$ |
| return s; |
| } |
| finally { |
| try {in.close();} catch (IOException ioe) {} |
| } |
| } |
| |
| /** |
| * Stores a string into an Eclipse file in UTF8 format. The file |
| * will be created if it does not already exist. |
| * @throws IOException, CoreException |
| */ |
| public static void writeStringToIFile(IFile file, String contents) throws IOException, CoreException { |
| byte[] data = contents.getBytes("UTF8"); //$NON-NLS-1$ |
| ByteArrayInputStream input = new ByteArrayInputStream(data); |
| if (file.exists()) { |
| if (file.isReadOnly()) { |
| // provide opportunity to checkout read-only .factorypath file |
| ResourcesPlugin.getWorkspace().validateEdit(new IFile[]{file}, null); |
| } |
| file.setContents(input, true, false, null); |
| } |
| else { |
| // Even with FORCE, create() will still throw if the file already exists. |
| file.create(input, IResource.FORCE, null); |
| } |
| } |
| |
| /** |
| * Stores a string into an ordinary workspace file in UTF8 format. |
| * The file will be created if it does not already exist. |
| * @throws IOException |
| */ |
| public static void writeStringToFile(File file, String contents) throws IOException { |
| byte[] data = contents.getBytes("UTF8"); //$NON-NLS-1$ |
| OutputStream out = new BufferedOutputStream(new FileOutputStream(file)); |
| try { |
| for (byte b : data) { |
| out.write(b); |
| } |
| } |
| finally { |
| try {out.close();} catch (IOException ioe) {} |
| } |
| } |
| |
| /** |
| * Return true if the content of the streams is identical, |
| * false if not. |
| */ |
| public static boolean compareStreams(InputStream is1, InputStream is2) { |
| try { |
| int b1 = is1.read(); |
| while(b1 != -1) { |
| int b2 = is2.read(); |
| if(b1 != b2) { |
| return false; |
| } |
| b1 = is1.read(); |
| } |
| |
| int b2 = is2.read(); |
| if(-1 != b2) { |
| return false; |
| } |
| return true; |
| } |
| catch (IOException ioe) { |
| return false; |
| } |
| } |
| } |