PushCertificate: implement hashCode/equals/toString

Change-Id: Ib588a3f47492cee5e5e6274a3b088678919a0fa0

org.eclipse.jgit/src/org/eclipse/jgit/transport/PushCertificate.java

@@ -50,6 +50,7 @@ import static org.eclipse.jgit.transport.PushCertificateParser.VERSION;
 
 import java.text.MessageFormat;
 import java.util.List;
+import java.util.Objects;
 
 import org.eclipse.jgit.internal.JGitText;
 
@@ -216,4 +217,45 @@ public class PushCertificate {
 		}
 		return sb.toString();
 	}
+
+	@Override
+	public int hashCode() {
+		return signature.hashCode();
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (!(o instanceof PushCertificate)) {
+			return false;
+		}
+		PushCertificate p = (PushCertificate) o;
+		return version.equals(p.version)
+				&& pusher.equals(p.pusher)
+				&& Objects.equals(pushee, p.pushee)
+				&& nonceStatus == p.nonceStatus
+				&& signature.equals(p.signature)
+				&& commandsEqual(this, p);
+	}
+
+	private static boolean commandsEqual(PushCertificate c1, PushCertificate c2) {
+		if (c1.commands.size() != c2.commands.size()) {
+			return false;
+		}
+		for (int i = 0; i < c1.commands.size(); i++) {
+			ReceiveCommand cmd1 = c1.commands.get(i);
+			ReceiveCommand cmd2 = c2.commands.get(i);
+			if (!cmd1.getOldId().equals(cmd2.getOldId())
+					|| !cmd1.getNewId().equals(cmd2.getNewId())
+					|| !cmd1.getRefName().equals(cmd2.getRefName())) {
+				return false;
+			}
+		}
+		return true;
+	}
+
+	@Override
+	public String toString() {
+		return getClass().getSimpleName() + '['
+				 + toText() + signature + ']';
+	}
 }