From b6269d550cecd7879d159b94dffa25122784db38 Mon Sep 17 00:00:00 2001
From: scott snyder <sss@karma>
Date: Thu, 17 Oct 2019 19:11:35 +0200
Subject: [PATCH] MuonIdHelpers: Add methods to test for the existence of
 subdetector helpers.

Add MuonIdHelperTool::has*IdHelper(), to provide a correct way of testing
for the presence of the subdetector helpers.
---
 .../MuonIdHelpers/MuonIdHelperTool.h           | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/MuonSpectrometer/MuonIdHelpers/MuonIdHelpers/MuonIdHelperTool.h b/MuonSpectrometer/MuonIdHelpers/MuonIdHelpers/MuonIdHelperTool.h
index f6f6a429b12..ad5f78bcea1 100644
--- a/MuonSpectrometer/MuonIdHelpers/MuonIdHelpers/MuonIdHelperTool.h
+++ b/MuonSpectrometer/MuonIdHelpers/MuonIdHelpers/MuonIdHelperTool.h
@@ -118,21 +118,39 @@ namespace Muon {
     /** @brief access to MdtIdHelper */
     const MdtIdHelper& mdtIdHelper() const { return *m_mdtIdHelper; }
 
+    /** @brief Test presence of MdtIdHelper */
+    bool hasMdtIdHelper() const { return m_mdtIdHelper != nullptr; }
+
     /** @brief access to RpcIdHelper */
     const RpcIdHelper& rpcIdHelper() const { return *m_rpcIdHelper; }
 
+    /** @brief Test presence of RpcIdHelper */
+    bool hasRpcIdHelper() const { return m_rpcIdHelper != nullptr; }
+
     /** @brief access to TgcIdHelper */
     const TgcIdHelper& tgcIdHelper() const { return *m_tgcIdHelper; }
 
+    /** @brief Test presence of TgcIdHelper */
+    bool hasTgcIdHelper() const { return m_tgcIdHelper != nullptr; }
+
     /** @brief access to CscIdHelper */
     const CscIdHelper& cscIdHelper() const { return *m_cscIdHelper; }
 
+    /** @brief Test presence of CscIdHelper */
+    bool hasCscIdHelper() const { return m_cscIdHelper != nullptr; }
+
     /** @brief access to TgcIdHelper */
     const sTgcIdHelper& stgcIdHelper() const { return *m_stgcIdHelper; }
 
+    /** @brief Test presence of sTgcIdHelper */
+    bool hassTgcIdHelper() const { return m_stgcIdHelper != nullptr; }
+
     /** @brief access to CscIdHelper */
     const MmIdHelper& mmIdHelper() const { return *m_mmIdHelper; }
 
+    /** @brief Test presence of sTgcIdHelper */
+    bool hasMmIdHelper() const { return m_mmIdHelper != nullptr; }
+
     /** @brief calculate chamber index from Identifier */
     MuonStationIndex::ChIndex chamberIndex( const Identifier& id ) const;
 
-- 
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