NetscapeCookieFile: Make hash static and group overloaded write

Issues reported by downstream analyzers.

The "hash" method can be static.

It is a good practice to group overloaded methods. Move the write(URL)
method with the other writes.

Change-Id: Ia42c0d7081333edcb77e58d5e627929d29672490
Signed-off-by: Ivan Frade <ifrade@google.com>

org.eclipse.jgit/src/org/eclipse/jgit/internal/transport/http/NetscapeCookieFile.java

@@ -277,64 +277,6 @@ public final class NetscapeCookieFile {
 		return cookie;
 	}
 
-	/**
-	 * Writes all the cookies being maintained in the set being returned by
-	 * {@link #getCookies(boolean)} to the underlying file.
-	 * <p>
-	 * Session-cookies will not be persisted.
-	 *
-	 * @param url
-	 *            url for which to write the cookies (important to derive
-	 *            default values for non-explicitly set attributes)
-	 * @throws IOException
-	 *             if the underlying cookie file could not be read or written or
-	 *             a problem with the lock file
-	 * @throws InterruptedException
-	 *             if the thread is interrupted while waiting for the lock
-	 */
-	public void write(URL url) throws IOException, InterruptedException {
-		try {
-			byte[] cookieFileContent = getFileContentIfModified();
-			if (cookieFileContent != null) {
-				LOG.debug("Reading the underlying cookie file '{}' " //$NON-NLS-1$
-						+ "as it has been modified since " //$NON-NLS-1$
-						+ "the last access", //$NON-NLS-1$
-						path);
-				// reread new changes if necessary
-				Set<HttpCookie> cookiesFromFile = NetscapeCookieFile
-						.parseCookieFile(cookieFileContent, creationDate);
-				this.cookies = mergeCookies(cookiesFromFile, cookies);
-			}
-		} catch (FileNotFoundException e) {
-			// ignore if file previously did not exist yet!
-		}
-
-		ByteArrayOutputStream output = new ByteArrayOutputStream();
-		try (Writer writer = new OutputStreamWriter(output,
-				StandardCharsets.US_ASCII)) {
-			write(writer, cookies, url, creationDate);
-		}
-		LockFile lockFile = new LockFile(path.toFile());
-		for (int retryCount = 0; retryCount < LOCK_ACQUIRE_MAX_RETRY_COUNT; retryCount++) {
-			if (lockFile.lock()) {
-				try {
-					lockFile.setNeedSnapshot(true);
-					lockFile.write(output.toByteArray());
-					if (!lockFile.commit()) {
-						throw new IOException(MessageFormat.format(
-								JGitText.get().cannotCommitWriteTo, path));
-					}
-				} finally {
-					lockFile.unlock();
-				}
-				return;
-			}
-			Thread.sleep(LOCK_ACQUIRE_RETRY_SLEEP);
-		}
-		throw new IOException(
-				MessageFormat.format(JGitText.get().cannotLock, lockFile));
-	}
-
 	/**
 	 * Read the underying file and return its content but only in case it has
 	 * been modified since the last access.
@@ -395,10 +337,68 @@ public final class NetscapeCookieFile {
 
 	}
 
-	private byte[] hash(final byte[] in) {
+	private static byte[] hash(final byte[] in) {
 		return Constants.newMessageDigest().digest(in);
 	}
 
+	/**
+	 * Writes all the cookies being maintained in the set being returned by
+	 * {@link #getCookies(boolean)} to the underlying file.
+	 * <p>
+	 * Session-cookies will not be persisted.
+	 *
+	 * @param url
+	 *            url for which to write the cookies (important to derive
+	 *            default values for non-explicitly set attributes)
+	 * @throws IOException
+	 *             if the underlying cookie file could not be read or written or
+	 *             a problem with the lock file
+	 * @throws InterruptedException
+	 *             if the thread is interrupted while waiting for the lock
+	 */
+	public void write(URL url) throws IOException, InterruptedException {
+		try {
+			byte[] cookieFileContent = getFileContentIfModified();
+			if (cookieFileContent != null) {
+				LOG.debug("Reading the underlying cookie file '{}' " //$NON-NLS-1$
+						+ "as it has been modified since " //$NON-NLS-1$
+						+ "the last access", //$NON-NLS-1$
+						path);
+				// reread new changes if necessary
+				Set<HttpCookie> cookiesFromFile = NetscapeCookieFile
+						.parseCookieFile(cookieFileContent, creationDate);
+				this.cookies = mergeCookies(cookiesFromFile, cookies);
+			}
+		} catch (FileNotFoundException e) {
+			// ignore if file previously did not exist yet!
+		}
+
+		ByteArrayOutputStream output = new ByteArrayOutputStream();
+		try (Writer writer = new OutputStreamWriter(output,
+				StandardCharsets.US_ASCII)) {
+			write(writer, cookies, url, creationDate);
+		}
+		LockFile lockFile = new LockFile(path.toFile());
+		for (int retryCount = 0; retryCount < LOCK_ACQUIRE_MAX_RETRY_COUNT; retryCount++) {
+			if (lockFile.lock()) {
+				try {
+					lockFile.setNeedSnapshot(true);
+					lockFile.write(output.toByteArray());
+					if (!lockFile.commit()) {
+						throw new IOException(MessageFormat.format(
+								JGitText.get().cannotCommitWriteTo, path));
+					}
+				} finally {
+					lockFile.unlock();
+				}
+				return;
+			}
+			Thread.sleep(LOCK_ACQUIRE_RETRY_SLEEP);
+		}
+		throw new IOException(
+				MessageFormat.format(JGitText.get().cannotLock, lockFile));
+	}
+
 	/**
 	 * Writes the given cookies to the file in the Netscape Cookie File Format
 	 * (also used by curl).