diff options
| author | Brian S. O'Neill <bronee@gmail.com> | 2006-08-30 02:06:57 +0000 |
|---|---|---|
| committer | Brian S. O'Neill <bronee@gmail.com> | 2006-08-30 02:06:57 +0000 |
| commit | 21ffac73f08766ea06a289028f7479d04cb0ccff (patch) | |
| tree | 88e292be0cb4f8813a075f99062baf3a0eaa9763 /src/main/java/com/amazon/carbonado/lob/FileBlob.java | |
| parent | 04b06d8fa2ced539126f74f4d8a19c29b62c5730 (diff) | |
Add LOB support
Diffstat (limited to 'src/main/java/com/amazon/carbonado/lob/FileBlob.java')
| -rw-r--r-- | src/main/java/com/amazon/carbonado/lob/FileBlob.java | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/main/java/com/amazon/carbonado/lob/FileBlob.java b/src/main/java/com/amazon/carbonado/lob/FileBlob.java new file mode 100644 index 0000000..c351361 --- /dev/null +++ b/src/main/java/com/amazon/carbonado/lob/FileBlob.java @@ -0,0 +1,112 @@ +/*
+ * Copyright 2006 Amazon Technologies, Inc. or its affiliates.
+ * Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
+ * of Amazon Technologies, Inc. or its affiliates. All rights reserved.
+ *
+ * Licensed 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 com.amazon.carbonado.lob;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.RandomAccessFile;
+
+import com.amazon.carbonado.FetchException;
+import com.amazon.carbonado.PersistException;
+
+import com.amazon.carbonado.spi.RAFInputStream;
+import com.amazon.carbonado.spi.RAFOutputStream;
+
+/**
+ * Implementation of a Blob which is backed by a File.
+ *
+ * @author Brian S O'Neill
+ */
+public class FileBlob extends AbstractBlob {
+ private final File mFile;
+
+ public FileBlob(File file) {
+ mFile = file;
+ }
+
+ public InputStream openInputStream() throws FetchException {
+ return openInputStream(0, -1);
+ }
+
+ public InputStream openInputStream(long pos) throws FetchException {
+ return openInputStream(pos, -1);
+ }
+
+ public InputStream openInputStream(long pos, int bufferSize) throws FetchException {
+ try {
+ RandomAccessFile raf = new RandomAccessFile(mFile, "r");
+ if (pos != 0) {
+ raf.seek(pos);
+ }
+ InputStream in = new RAFInputStream(raf);
+ if (bufferSize < 0) {
+ in = new BufferedInputStream(in);
+ } else if (bufferSize > 0) {
+ in = new BufferedInputStream(in, bufferSize);
+ }
+ return in;
+ } catch (IOException e) {
+ throw new FetchException(e);
+ }
+ }
+
+ public long getLength() throws FetchException {
+ return mFile.length();
+ }
+
+ public OutputStream openOutputStream() throws PersistException {
+ return openOutputStream(0, -1);
+ }
+
+ public OutputStream openOutputStream(long pos) throws PersistException {
+ return openOutputStream(pos, -1);
+ }
+
+ public OutputStream openOutputStream(long pos, int bufferSize) throws PersistException {
+ try {
+ RandomAccessFile raf = new RandomAccessFile(mFile, "rw");
+ if (pos != 0) {
+ raf.seek(pos);
+ }
+ OutputStream out = new RAFOutputStream(raf);
+ if (bufferSize < 0) {
+ out = new BufferedOutputStream(out);
+ } else if (bufferSize > 0) {
+ out = new BufferedOutputStream(out, bufferSize);
+ }
+ return out;
+ } catch (IOException e) {
+ throw new PersistException(e);
+ }
+ }
+
+ public void setLength(long length) throws PersistException {
+ try {
+ RandomAccessFile raf = new RandomAccessFile(mFile, "rw");
+ raf.setLength(length);
+ raf.close();
+ } catch (IOException e) {
+ throw new PersistException(e);
+ }
+ }
+}
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