lgoldstein commented on a change in pull request #206: URL: https://github.com/apache/mina-sshd/pull/206#discussion_r737584656
########## File path: sshd-sftp/src/main/java/org/apache/sshd/sftp/server/RemoteDirectoryHandle.java ########## @@ -0,0 +1,81 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.sshd.sftp.server; + +import java.io.Closeable; +import java.io.IOException; +import java.util.Iterator; +import java.util.NoSuchElementException; + +import org.apache.sshd.sftp.client.SftpClient; +import org.apache.sshd.sftp.client.SftpClient.DirEntry; +import org.apache.sshd.sftp.client.fs.SftpPath; +import org.apache.sshd.sftp.client.impl.SftpIterableDirEntry; + +public class RemoteDirectoryHandle extends Handle implements Iterator<SftpClient.DirEntry> { + + private final SftpIterableDirEntry entries; + + private Iterator<SftpClient.DirEntry> iterator; + + private boolean atStart = true; + + private boolean done; + + protected RemoteDirectoryHandle(SftpSubsystem subsystem, SftpPath file, String handle) throws IOException { + super(subsystem, file, handle); + entries = new SftpIterableDirEntry(file.getFileSystem().getClient(), file.toString()); + } + + public boolean atStart() { Review comment: I recommend using `isAtStart()` to conform with Java beans conventions (even though this is not a bean...) ########## File path: sshd-sftp/src/main/java/org/apache/sshd/sftp/server/RemoteDirectoryHandle.java ########## @@ -0,0 +1,81 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.sshd.sftp.server; + +import java.io.Closeable; +import java.io.IOException; +import java.util.Iterator; +import java.util.NoSuchElementException; + +import org.apache.sshd.sftp.client.SftpClient; +import org.apache.sshd.sftp.client.SftpClient.DirEntry; +import org.apache.sshd.sftp.client.fs.SftpPath; +import org.apache.sshd.sftp.client.impl.SftpIterableDirEntry; + +public class RemoteDirectoryHandle extends Handle implements Iterator<SftpClient.DirEntry> { + + private final SftpIterableDirEntry entries; + + private Iterator<SftpClient.DirEntry> iterator; + + private boolean atStart = true; + + private boolean done; + + protected RemoteDirectoryHandle(SftpSubsystem subsystem, SftpPath file, String handle) throws IOException { + super(subsystem, file, handle); + entries = new SftpIterableDirEntry(file.getFileSystem().getClient(), file.toString()); + } + + public boolean atStart() { + return atStart; + } + + @Override + public boolean hasNext() { + if (done) { + return false; + } + if (iterator == null) { + iterator = entries.iterator(); + } + done = !iterator.hasNext(); + return !done; + } + + @Override + public DirEntry next() { + if (!hasNext()) { + throw new NoSuchElementException(); Review comment: Recommend adding some informative text to the exception - e.g., `"No more entries to iterate for " + getPath()` so that if it occurs the user will know what directory was being iterated ########## File path: sshd-sftp/src/main/java/org/apache/sshd/sftp/server/RemoteDirectoryHandle.java ########## @@ -0,0 +1,81 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.sshd.sftp.server; + +import java.io.Closeable; +import java.io.IOException; +import java.util.Iterator; +import java.util.NoSuchElementException; + +import org.apache.sshd.sftp.client.SftpClient; +import org.apache.sshd.sftp.client.SftpClient.DirEntry; +import org.apache.sshd.sftp.client.fs.SftpPath; +import org.apache.sshd.sftp.client.impl.SftpIterableDirEntry; + +public class RemoteDirectoryHandle extends Handle implements Iterator<SftpClient.DirEntry> { + + private final SftpIterableDirEntry entries; + + private Iterator<SftpClient.DirEntry> iterator; + + private boolean atStart = true; + + private boolean done; + + protected RemoteDirectoryHandle(SftpSubsystem subsystem, SftpPath file, String handle) throws IOException { + super(subsystem, file, handle); + entries = new SftpIterableDirEntry(file.getFileSystem().getClient(), file.toString()); + } + + public boolean atStart() { + return atStart; + } + + @Override + public boolean hasNext() { + if (done) { + return false; + } + if (iterator == null) { + iterator = entries.iterator(); + } + done = !iterator.hasNext(); + return !done; + } + + @Override + public DirEntry next() { + if (!hasNext()) { + throw new NoSuchElementException(); + } + atStart = false; + return iterator.next(); + } + + @Override + public void close() throws IOException { + super.close(); Review comment: What if `super.close()` throws an exception ? the code after it will not be executed. Perhaps better: ```java try { super.close(); } finally { ... the rest of the code ... } ``` ########## File path: sshd-sftp/src/main/java/org/apache/sshd/sftp/server/SftpEventListener.java ########## @@ -155,6 +155,21 @@ default void readingEntries( // ignored } + /** + * About to read entries from a remote directory - <B>Note:</B> might not be the 1st time it is called for the + * directory in case several iterations are required in order to go through all the entries in the directory + * + * @param session The {@link ServerSession} through which the request was handled + * @param remoteHandle The (opaque) assigned handle for the directory + * @param localHandle The associated {@link RemoteDirectoryHandle} + * @throws IOException If failed to handle the call + * @see #readEntries(ServerSession, String, RemoteDirectoryHandle, Map) readEntries + */ + default void readingEntries(ServerSession session, String remoteHandle, RemoteDirectoryHandle localHandle) Review comment: I think that overloading the method is not a good idea - let's rename this `readingRemoteEntries` ########## File path: sshd-sftp/src/main/java/org/apache/sshd/sftp/server/SftpEventListener.java ########## @@ -172,6 +187,24 @@ default void readEntries( // ignored } + /** + * Result of reading entries from a remote directory - <B>Note:</B> it may be a <U>partial</U> result if the + * directory contains more entries than can be accommodated in the response + * + * @param session The {@link ServerSession} through which the request was handled + * @param remoteHandle The (opaque) assigned handle for the directory + * @param localHandle The associated {@link RemoteDirectoryHandle} + * @param entries A {@link Map} of the listed entries - key = short name, value = {@link Path} of the + * sub-entry + * @throws IOException If failed to handle the call + */ + default void readEntries( Review comment: I think that overloading the method is not a good idea - let's rename this `readRemoteEntries` -- This is an automated message from the Apache Git Service. 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