From 21ffac73f08766ea06a289028f7479d04cb0ccff Mon Sep 17 00:00:00 2001
From: "Brian S. O'Neill" <bronee@gmail.com>
Date: Wed, 30 Aug 2006 02:06:57 +0000
Subject: Add LOB support

---
 .../java/com/amazon/carbonado/lob/FileBlob.java    | 112 +++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 src/main/java/com/amazon/carbonado/lob/FileBlob.java

(limited to 'src/main/java/com/amazon/carbonado/lob/FileBlob.java')

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);
+        }
+    }
+}
-- 
cgit v1.2.3