+++ /dev/null
-/*
- * Copyright (C) 2013, Google Inc.
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-package org.eclipse.jgit.internal.storage.dfs;
-
-import static org.junit.Assert.assertEquals;
-
-import java.io.IOException;
-import java.io.InputStream;
-
-import org.eclipse.jgit.lib.Constants;
-import org.eclipse.jgit.util.RawParseUtils;
-import org.junit.Test;
-
-public class DfsOutputStreamTest {
- @Test
- public void testReadEmpty() throws IOException {
- DfsOutputStream os = newDfsOutputStream(8);
- os.write(Constants.encode(""));
- assertEquals("", readBuffered(os.openInputStream(0)));
- assertEquals("", readByByte(os.openInputStream(0)));
- assertEquals("", readBuffered(os.openInputStream(1)));
- assertEquals("", readByByte(os.openInputStream(1)));
- }
-
- @Test
- public void testRead() throws IOException {
- DfsOutputStream os = newDfsOutputStream(8);
- os.write(Constants.encode("data"));
- assertEquals("data", readBuffered(os.openInputStream(0)));
- assertEquals("data", readByByte(os.openInputStream(0)));
- assertEquals("ata", readBuffered(os.openInputStream(1)));
- assertEquals("ata", readByByte(os.openInputStream(1)));
- assertEquals("ta", readBuffered(os.openInputStream(2)));
- assertEquals("ta", readByByte(os.openInputStream(2)));
- assertEquals("a", readBuffered(os.openInputStream(3)));
- assertEquals("a", readByByte(os.openInputStream(3)));
- assertEquals("", readBuffered(os.openInputStream(4)));
- assertEquals("", readByByte(os.openInputStream(4)));
- assertEquals("", readBuffered(os.openInputStream(5)));
- assertEquals("", readByByte(os.openInputStream(5)));
- }
-
- @Test
- public void testReadSmallBuffer() throws IOException {
- DfsOutputStream os = newDfsOutputStream(8);
- os.write(Constants.encode("data"));
- assertEquals("data", readBuffered(os.openInputStream(0), 2));
- assertEquals("ata", readBuffered(os.openInputStream(1), 2));
- assertEquals("ta", readBuffered(os.openInputStream(2), 2));
- assertEquals("a", readBuffered(os.openInputStream(3), 2));
- assertEquals("", readBuffered(os.openInputStream(4), 2));
- assertEquals("", readBuffered(os.openInputStream(5), 2));
- }
-
- @Test
- public void testReadMultipleBlocks() throws IOException {
- DfsOutputStream os = newDfsOutputStream(2);
- os.write(Constants.encode("data"));
- assertEquals("data", readBuffered(os.openInputStream(0)));
- assertEquals("data", readByByte(os.openInputStream(0)));
- assertEquals("ata", readBuffered(os.openInputStream(1)));
- assertEquals("ata", readByByte(os.openInputStream(1)));
- assertEquals("ta", readBuffered(os.openInputStream(2)));
- assertEquals("ta", readByByte(os.openInputStream(2)));
- assertEquals("a", readBuffered(os.openInputStream(3)));
- assertEquals("a", readByByte(os.openInputStream(3)));
- assertEquals("", readBuffered(os.openInputStream(4)));
- assertEquals("", readByByte(os.openInputStream(4)));
- assertEquals("", readBuffered(os.openInputStream(5)));
- assertEquals("", readByByte(os.openInputStream(5)));
- }
-
- private static DfsOutputStream newDfsOutputStream(final int blockSize) {
- return new InMemoryOutputStream() {
- @Override
- public int blockSize() {
- return blockSize;
- }
- };
- }
-
- private static String readBuffered(InputStream is, int bufsize)
- throws IOException {
- StringBuilder out = new StringBuilder();
- byte[] buf = new byte[bufsize];
- while (true) {
- int n = is.read(buf, 0, buf.length);
- if (n < 0)
- break;
- out.append(RawParseUtils.decode(buf, 0, n));
- }
- return out.toString();
- }
-
- private static String readBuffered(InputStream is) throws IOException {
- return readBuffered(is, 64);
- }
-
- private static String readByByte(InputStream is) throws IOException {
- StringBuilder out = new StringBuilder();
- while (true) {
- int c = is.read();
- if (c < 0)
- break;
- out.append(RawParseUtils.decode(new byte[] {(byte) c}));
- }
- return out.toString();
- }
-}
package org.eclipse.jgit.internal.storage.dfs;
import java.io.IOException;
-import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
* to DFS errors.
*/
public abstract int read(long position, ByteBuffer buf) throws IOException;
-
- /**
- * Open a stream to read back a portion of already written data.
- * <p>
- * The writing position of the output stream is not affected by a read. The
- * input stream can be read up to the current writing position. Closing the
- * returned stream has no effect on the underlying {@link DfsOutputStream}.
- *
- * @param position
- * offset to read from.
- * @return new input stream
- */
- public InputStream openInputStream(final long position) {
- return new ReadBackStream(position);
- }
-
- private class ReadBackStream extends InputStream {
- private final ByteBuffer buf;
- private long position;
-
- private ReadBackStream(long position) {
- int bs = blockSize();
- this.position = position;
- buf = ByteBuffer.allocate(bs > 0 ? bs : 8192);
- buf.position(buf.limit());
- }
-
- @Override
- public int read(byte[] b, int off, int len) throws IOException {
- int cnt = 0;
- while (0 < len) {
- if (!buf.hasRemaining()) {
- buf.rewind();
- int nr = DfsOutputStream.this.read(position, buf);
- if (nr < 0) {
- buf.position(buf.limit());
- break;
- }
- position += nr;
- buf.flip();
- }
- int n = Math.min(len, buf.remaining());
- buf.get(b, off, n);
- off += n;
- len -= n;
- cnt += n;
- }
- if (cnt == 0 && len > 0) return -1;
- return cnt;
- }
-
- @Override
- public int read() throws IOException {
- byte[] b = new byte[1];
- int n = read(b);
- return n == 1 ? b[0] & 0xff : -1;
- }
- }
}
+++ /dev/null
-/*
- * Copyright (C) 2013, Google Inc.
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-package org.eclipse.jgit.internal.storage.dfs;
-
-import java.io.ByteArrayOutputStream;
-import java.nio.ByteBuffer;
-
-class InMemoryOutputStream extends DfsOutputStream {
- private final ByteArrayOutputStream dst = new ByteArrayOutputStream();
-
- private byte[] data;
-
- @Override
- public void write(byte[] buf, int off, int len) {
- data = null;
- dst.write(buf, off, len);
- }
-
- @Override
- public int read(long position, ByteBuffer buf) {
- byte[] d = getData();
- int n = Math.min(buf.remaining(), d.length - (int) position);
- if (n <= 0)
- return -1;
- buf.put(d, (int) position, n);
- return n;
- }
-
- byte[] getData() {
- if (data == null)
- data = dst.toByteArray();
- return data;
- }
-
- @Override
- public void flush() {
- // Default implementation does nothing;
- }
-
- @Override
- public void close() {
- flush();
- }
-}
projects / jgit.git / commitdiff