org.spearce.jgit/src/org/spearce/jgit/lib/DeltaRefPackedObjectLoader.java

   1 package org.spearce.jgit.lib;
   2
   3 import java.io.IOException;
   4
   5 import org.spearce.jgit.errors.MissingObjectException;
   6
   7 /** Reads a deltaified object which uses an {@link ObjectId} to find its base. */
   8 class DeltaRefPackedObjectLoader extends DeltaPackedObjectLoader {
   9     private final ObjectId deltaBase;
  10
  11     DeltaRefPackedObjectLoader(final PackFile pr, final long offset,
  12             final int deltaSz, final ObjectId base) {
  13         super(pr, offset, deltaSz);
  14         deltaBase = base;
  15     }
  16
  17     protected ObjectLoader getBaseLoader() throws IOException {
  18         final ObjectLoader or = pack.get(deltaBase,
  19                 new byte[Constants.OBJECT_ID_LENGTH]);
  20         if (or == null)
  21             throw new MissingObjectException(deltaBase, "delta base");
  22         return or;
  23     }
  24 }