This permits using a DirCache as a temporary storage area in memory
only, with no chance of it being written out to disk.
Signed-off-by: Shawn O. Pearce <spearce@xxxxxxxxxxx>
---
.../src/org/spearce/jgit/dircache/DirCache.java | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/org.spearce.jgit/src/org/spearce/jgit/dircache/DirCache.java b/org.spearce.jgit/src/org/spearce/jgit/dircache/DirCache.java
index b3c57ad..c5a4f91 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/dircache/DirCache.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/dircache/DirCache.java
@@ -111,6 +111,17 @@ static int cmp(final byte[] aPath, final int aLen, final byte[] bPath,
}
/**
+ * Create a new empty index which is never stored on disk.
+ *
+ * @return an empty cache which has no backing store file. The cache may not
+ * be read or written, but it may be queried and updated (in
+ * memory).
+ */
+ public static DirCache newInCore() {
+ return new DirCache(null);
+ }
+
+ /**
* Create a new in-core index representation and read an index from disk.
* <p>
* The new index will be read before it is returned to the caller. Read
@@ -297,6 +308,8 @@ void replace(final DirCacheEntry[] e, final int cnt) {
* library does not support.
*/
public void read() throws IOException, CorruptObjectException {
+ if (liveFile == null)
+ throw new IOException("DirCache does not have a backing file");
if (!liveFile.exists())
clear();
else if (liveFile.lastModified() != lastModified) {
@@ -407,6 +420,8 @@ private static boolean is_DIRC(final byte[] hdr) {
* hold the lock.
*/
public boolean lock() throws IOException {
+ if (liveFile == null)
+ throw new IOException("DirCache does not have a backing file");
final LockFile tmp = new LockFile(liveFile);
if (tmp.lock()) {
tmp.setNeedStatInformation(true);
@@ -515,6 +530,8 @@ public boolean commit() {
}
private void requireLocked(final LockFile tmp) {
+ if (liveFile == null)
+ throw new IllegalStateException("DirCache is not locked");
if (tmp == null)
throw new IllegalStateException("DirCache "
+ liveFile.getAbsolutePath() + " not locked.");
--
1.6.1.399.g0d272
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