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RefDatabase: add hasRefs convenience method 

Callers can now say:

 db.getRefDatabase().hasRefs()

rather than the more verbose:

 !db.getRefDatabase().getAllRefs().isEmpty()

The default implementation simply uses getAllRefs().isEmpty(), but a
derived class could possibly override the method with a more efficient
implementation.

Change-Id: I5244520708a1a7d9adb351f10e43fc39d98e22a1
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
This commit is contained in:
David Pursehouse 2018-04-27 21:49:08 +09:00 committed by Matthias Sohn
parent d4f3ae0c43
commit 9fb724f1b9
2 changed files with 13 additions and 1 deletions
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2
org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/debug/RebuildCommitGraph.java
View File

@ -115,7 +115,7 @@ class RebuildCommitGraph extends TextBuiltin {
/** {@inheritDoc} */
@Override
protected void run() throws Exception {
if (!really && !db.getRefDatabase().getAllRefs().isEmpty()) {
if (!really && db.getRefDatabase().hasRefs()) {
File directory = db.getDirectory();
String absolutePath = directory == null ? "null" //$NON-NLS-1$
: directory.getAbsolutePath();

12
org.eclipse.jgit/src/org/eclipse/jgit/lib/RefDatabase.java
View File

@ -407,6 +407,18 @@ public List<Ref> getAllRefs() throws IOException {
return getRefsByPrefix(ALL);
}
/**
* Check if any refs exist in the ref database.
*
* @return true if the database has refs.
* @throws java.io.IOException
* the reference space cannot be accessed.
* @since 5.0
*/
public boolean hasRefs() throws IOException {
return !getAllRefs().isEmpty();
}
/**
* Get the additional reference-like entities from the repository.
* <p>