From c7642d11a5e493dee7bcee164efbdc42f7c7a447 Mon Sep 17 00:00:00 2001
From: Kushal Munir < kmunir@ca.ibm.com>
Date: Fri, 6 Apr 2007 17:04:14 +0000
Subject: [PATCH] [170916] [plan][efs] Fix and improve the RSE EFS integration.
 Implement childInfos() to get info about all children at once, rather than
 calling fetchInfo() for each child which would mean network access for each
 child. This is a big performance improvement.

---
 .../eclipse/filesystem/RSEFileStore.java      | 118 +++++++++++++++++-
 1 file changed, 117 insertions(+), 1 deletion(-)

diff --git a/rse/plugins/org.eclipse.rse.eclipse.filesystem/src/org/eclipse/rse/internal/eclipse/filesystem/RSEFileStore.java b/rse/plugins/org.eclipse.rse.eclipse.filesystem/src/org/eclipse/rse/internal/eclipse/filesystem/RSEFileStore.java
index 7d1103d238d..4e15266212b 100644
--- a/rse/plugins/org.eclipse.rse.eclipse.filesystem/src/org/eclipse/rse/internal/eclipse/filesystem/RSEFileStore.java
+++ b/rse/plugins/org.eclipse.rse.eclipse.filesystem/src/org/eclipse/rse/internal/eclipse/filesystem/RSEFileStore.java
@@ -18,7 +18,6 @@ package org.eclipse.rse.internal.eclipse.filesystem;
 
 import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
-import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -209,6 +208,123 @@ public class RSEFileStore extends FileStore implements IFileStore
 		return names;
 	}
 	
+	/**
+	 * @see org.eclipse.core.filesystem.provider.FileStore#childInfos(int, org.eclipse.core.runtime.IProgressMonitor)
+	 */
+	public IFileInfo[] childInfos(int options, IProgressMonitor monitor) throws CoreException {
+		
+		FileInfo[] infos;
+		
+		if (!_subSystem.isConnected()) {
+			
+			try {
+				_subSystem.connect(monitor);
+			}
+			catch (Exception e) {
+				throw new CoreException(new Status(IStatus.ERROR, Activator.getDefault().getBundle().getSymbolicName(), "Could not connect to subsystem", e)); //$NON-NLS-1$
+			}
+		}
+		
+		// at this point get the live remote file because we want to fetch the info about this file
+		try {
+			_remoteFile = _subSystem.getRemoteFileObject(_absolutePath);
+		}
+		catch (Exception e) {
+			throw new CoreException(new Status(IStatus.ERROR, Activator.getDefault().getBundle().getSymbolicName(), "Could not get remote file", e)); //$NON-NLS-1$
+		}
+		
+		if (_remoteFile == null || !_remoteFile.exists()) {
+			throw new CoreException(new Status(IStatus.ERROR, Activator.getDefault().getBundle().getSymbolicName(), "The file store does not exist")); //$NON-NLS-1$
+		}
+		
+		if (!_remoteFile.isStale() && _remoteFile.hasContents(RemoteChildrenContentsType.getInstance()) && !(_subSystem instanceof IFileServiceSubSystem))
+		{
+			Object[] children = _remoteFile.getContents(RemoteChildrenContentsType.getInstance());
+			
+			infos = new FileInfo[children.length];
+			                
+			for (int i = 0; i < children.length; i++)
+			{
+				IRemoteFile file = (IRemoteFile)(children[i]);
+				FileInfo info = new FileInfo(file.getName());
+				
+				if (!file.exists()) {
+					info.setExists(false);
+				}
+				else {
+					info.setExists(true);
+					info.setLastModified(file.getLastModified());
+					boolean isDir = file.isDirectory();
+					info.setDirectory(isDir);
+					info.setAttribute(EFS.ATTRIBUTE_READ_ONLY, !file.canWrite());
+					info.setAttribute(EFS.ATTRIBUTE_EXECUTABLE, file.isExecutable());
+					info.setAttribute(EFS.ATTRIBUTE_ARCHIVE, file.isArchive());
+					info.setAttribute(EFS.ATTRIBUTE_HIDDEN, file.isHidden());
+
+					if (!isDir) {
+						info.setLength(file.getLength());
+					}
+				}
+				
+				infos[i] = info;
+			}
+		}
+		else
+		{
+			try {
+				
+				IRemoteFile[] children = null;
+				
+				if (_subSystem instanceof FileServiceSubSystem) {
+					FileServiceSubSystem fileServiceSubSystem = ((FileServiceSubSystem)_subSystem);
+					IHostFile[] results = fileServiceSubSystem.getFileService().getFilesAndFolders(monitor, _remoteFile.getAbsolutePath(), "*"); //$NON-NLS-1$
+					IRemoteFileSubSystemConfiguration config = _subSystem.getParentRemoteFileSubSystemConfiguration();
+					RemoteFileFilterString filterString = new RemoteFileFilterString(config, _remoteFile.getAbsolutePath(), "*"); //$NON-NLS-1$
+					filterString.setShowFiles(true);
+					filterString.setShowSubDirs(true);
+					RemoteFileContext context = new RemoteFileContext(_subSystem, _remoteFile, filterString);
+					children = fileServiceSubSystem.getHostFileToRemoteFileAdapter().convertToRemoteFiles(fileServiceSubSystem, context, _remoteFile, results);
+				}
+				else {
+					children = _subSystem.listFoldersAndFiles(_remoteFile, "*", monitor); //$NON-NLS-1$
+				}
+				
+				infos = new FileInfo[children.length];
+				
+				for (int i = 0; i < children.length; i++)
+				{
+					IRemoteFile file = children[i];
+					FileInfo info = new FileInfo(file.getName());
+					
+					if (!file.exists()) {
+						info.setExists(false);
+					}
+					else {
+						info.setExists(true);
+						info.setLastModified(file.getLastModified());
+						boolean isDir = file.isDirectory();
+						info.setDirectory(isDir);
+						info.setAttribute(EFS.ATTRIBUTE_READ_ONLY, !file.canWrite());
+						info.setAttribute(EFS.ATTRIBUTE_EXECUTABLE, file.isExecutable());
+						info.setAttribute(EFS.ATTRIBUTE_ARCHIVE, file.isArchive());
+						info.setAttribute(EFS.ATTRIBUTE_HIDDEN, file.isHidden());
+
+						if (!isDir) {
+							info.setLength(file.getLength());
+						}
+					}
+					
+					infos[i] = info;
+				}		
+			}
+			catch (SystemMessageException e) {
+				infos = new FileInfo[0];
+			}
+		}
+		
+		return infos;
+	}
+
 	public IFileInfo fetchInfo(int options, IProgressMonitor monitor) throws CoreException {
 		
 		// connect if needed