Some applications want to dereference an ObjectId back to a tree,
and they don't care what type of object the ObjectId supplied is
actually of. If its an annotated tag we can peel the tag back to
either a tree, or a commit, and a commit can be peeled back to its
only tree. So parseTree is a simple API for ^{tree}.
Signed-off-by: Shawn O. Pearce <spearce@xxxxxxxxxxx>
---
.../src/org/spearce/jgit/revwalk/RevWalk.java | 35 ++++++++++++++++++++
1 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/org.spearce.jgit/src/org/spearce/jgit/revwalk/RevWalk.java b/org.spearce.jgit/src/org/spearce/jgit/revwalk/RevWalk.java
index 946486c..42ec2a2 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/revwalk/RevWalk.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/revwalk/RevWalk.java
@@ -612,6 +612,41 @@ public class RevWalk implements Iterable<RevCommit> {
}
/**
+ * Locate a reference to a tree.
+ * <p>
+ * This method only returns successfully if the tree object exists, is
+ * verified to be a tree, and was parsed without error.
+ *
+ * @param id
+ * name of the tree object, or a commit or annotated tag that may
+ * reference a tree.
+ * @return reference to the tree object. Never null.
+ * @throws MissingObjectException
+ * the supplied tree does not exist.
+ * @throws IncorrectObjectTypeException
+ * the supplied id is not a tree, a commit or an annotated tag.
+ * @throws IOException
+ * a pack file or loose object could not be read.
+ */
+ public RevTree parseTree(final AnyObjectId id)
+ throws MissingObjectException, IncorrectObjectTypeException,
+ IOException {
+ RevObject c = parseAny(id);
+ while (c instanceof RevTag) {
+ c = ((RevTag) c).getObject();
+ parse(c);
+ }
+ if (c instanceof RevCommit) {
+ c = ((RevCommit) c).getTree();
+ parse(c);
+ }
+ final RevTree t = (RevTree) c;
+ if (db.openObject(t).getType() != Constants.OBJ_TREE)
+ throw new IncorrectObjectTypeException(t, Constants.TYPE_TREE);
+ return t;
+ }
+
+ /**
* Locate a reference to any object and immediately parse its content.
* <p>
* This method only returns successfully if the object exists and was parsed
--
1.5.6.3.569.ga9185
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