[PATCH JGIT] Allow writeObject() write to OutputStream

["Daniel Cheng (aka SDiZ)" <j16sdiz+freenet@gmail.com>]

Signed-off-by: Daniel Cheng (aka SDiZ) <j16sdiz+freenet@gmail.com>
---

This patch make factor out the object writing code in ObjectWriter,
allow it to write to any OutputStream. 
Subclass class may then override
  writeObject(final int type, long len, InputStream is, boolean store)
to make it write to alternative locations.

There are some discussion on devl@freenetproject.org to use raw 
(uncompressed) object to freenet. This patch allow the testing.

 .../src/org/spearce/jgit/lib/ObjectWriter.java     |   93 +++++++++++---------
 1 files changed, 50 insertions(+), 43 deletions(-)

diff --git a/org.spearce.jgit/src/org/spearce/jgit/lib/ObjectWriter.java b/org.spearce.jgit/src/org/spearce/jgit/lib/ObjectWriter.java
index 546cc68..97acae4 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/lib/ObjectWriter.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/lib/ObjectWriter.java
@@ -45,6 +45,7 @@
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.security.MessageDigest;
 import java.util.zip.Deflater;
@@ -297,8 +298,52 @@ public ObjectId computeBlobSha1(final long len, final InputStream is)
 		return writeObject(Constants.OBJ_BLOB, len, is, false);
 	}
 
-	ObjectId writeObject(final int type, long len, final InputStream is,
-			boolean store) throws IOException {
+	protected ObjectId writeObject(final int type, long len,
+			final InputStream is, final OutputStream deflateStream)
+			throws IOException {
+		md.reset();
+
+		byte[] header;
+		int n;
+
+		header = Constants.encodedTypeString(type);
+		md.update(header);
+		if (deflateStream != null)
+			deflateStream.write(header);
+
+		md.update((byte) ' ');
+		if (deflateStream != null)
+			deflateStream.write((byte) ' ');
+
+		header = Constants.encodeASCII(len);
+		md.update(header);
+		if (deflateStream != null)
+			deflateStream.write(header);
+
+		md.update((byte) 0);
+		if (deflateStream != null)
+			deflateStream.write((byte) 0);
+
+		while (len > 0
+				&& (n = is.read(buf, 0, (int) Math.min(len, buf.length))) > 0) {
+			md.update(buf, 0, n);
+			if (deflateStream != null)
+				deflateStream.write(buf, 0, n);
+			len -= n;
+		}
+
+		if (len != 0)
+			throw new IOException("Input did not match supplied length. " + len
+					+ " bytes are missing.");
+
+		if (deflateStream != null)
+			deflateStream.close();
+
+		return ObjectId.fromRaw(md.digest());
+	}
+
+	protected ObjectId writeObject(final int type, long len,
+			final InputStream is, boolean store) throws IOException {
 		final File t;
 		final DeflaterOutputStream deflateStream;
 		final FileOutputStream fileStream;
@@ -312,7 +357,6 @@ ObjectId writeObject(final int type, long len, final InputStream is,
 			fileStream = null;
 		}
 
-		md.reset();
 		if (store) {
 			def.reset();
 			deflateStream = new DeflaterOutputStream(fileStream, def);
@@ -320,46 +364,9 @@ ObjectId writeObject(final int type, long len, final InputStream is,
 			deflateStream = null;
 
 		try {
-			byte[] header;
-			int n;
-
-			header = Constants.encodedTypeString(type);
-			md.update(header);
-			if (deflateStream != null)
-				deflateStream.write(header);
-
-			md.update((byte) ' ');
-			if (deflateStream != null)
-				deflateStream.write((byte) ' ');
-
-			header = Constants.encodeASCII(len);
-			md.update(header);
-			if (deflateStream != null)
-				deflateStream.write(header);
-
-			md.update((byte) 0);
-			if (deflateStream != null)
-				deflateStream.write((byte) 0);
-
-			while (len > 0
-					&& (n = is.read(buf, 0, (int) Math.min(len, buf.length))) > 0) {
-				md.update(buf, 0, n);
-				if (deflateStream != null)
-					deflateStream.write(buf, 0, n);
-				len -= n;
-			}
-
-			if (len != 0)
-				throw new IOException("Input did not match supplied length. "
-						+ len + " bytes are missing.");
-
-			if (deflateStream != null ) {
-				deflateStream.close();
-				if (t != null)
-					t.setReadOnly();
-			}
-
-			id = ObjectId.fromRaw(md.digest());
+			id = writeObject(type, len, is, deflateStream);
+			if (t != null)
+				t.setReadOnly();
 		} finally {
 			if (id == null && deflateStream != null) {
 				try {
-- 
1.6.2