CaloLVL1_ID.cxx

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
#include "CaloIdentifier/CaloLVL1_ID.h"
#include "AtlasDetDescr/AtlasDetectorID.h"
#include "IdDict/IdDictDictionary.h"
#include "IdDict/IdDictField.h"
#include "IdDict/IdDictMgr.h"
#include "IdDict/IdDictRegion.h"
#include "CxxUtils/StrFormat.h"
#include "Identifier/IdentifierHash.h"
#include "Identifier/RangeIterator.h"
#include <algorithm>
#include <cassert>
#include <cmath>
#include <cstdio>
#include <iostream>
#include <set>
#include <string>
 
 
using CxxUtils::strformat;
 
 
CaloLVL1_ID::CaloLVL1_ID() :
    AtlasDetectorID("CaloLVL1_ID", "Reg_Lvl1")
  , m_lvl1_region_index(0)
  , m_CALO_INDEX(999) 
  , m_DETZSIDE_INDEX(999) 
  , m_SAMPLING_INDEX(999) 
  , m_REGION_INDEX(999) 
  , m_ETA_INDEX(999)
  , m_PHI_INDEX(999)
  , m_LAYER_INDEX(999)
  , m_dict(nullptr)
  , m_tower_hash_max(0) 
  , m_layer_hash_max(0) 
  , m_region_hash_max(0) 
 
{
 
}
 
CaloLVL1_ID:: ~CaloLVL1_ID()= default;
 
 
 
IdContext  
CaloLVL1_ID::region_context      () const
{
    ExpandedIdentifier id;
    return {id, 0, m_REGION_INDEX};
}
 
IdContext  
CaloLVL1_ID::tower_context        () const
{
    ExpandedIdentifier id;
    return {id, 0, m_PHI_INDEX};
}
 
IdContext  
CaloLVL1_ID::layer_context        () const
{
    ExpandedIdentifier id;
    return {id, 0, m_LAYER_INDEX};
}
 
 
 
int  CaloLVL1_ID::get_id  (const IdentifierHash& hash_id, Identifier& id, const IdContext* context) const
{
  int result = 1;
  id.clear();
 
  size_t begin = (context) ? context->begin_index(): 0;
  // cannot get hash if end is 0:
  size_t end   = (context) ? context->end_index()  : 0; 
 
  if (0 == begin) { 
    if (m_REGION_INDEX == end) {
      if (hash_id < (unsigned int)(m_region_vec.end() - m_region_vec.begin())) 
    {
      id = m_region_vec[hash_id];
      result = 0;
    } 
      else 
    {
      ATH_MSG_ERROR("hash_id out of range " << hash_id);
    }
    }
    else if (m_PHI_INDEX == end) {
      if (hash_id < (unsigned int)(m_tower_vec.end() - m_tower_vec.begin())) {
    id = m_tower_vec[hash_id];
    result = 0;
      } 
      else 
    {
      ATH_MSG_ERROR("hash_id out of range " << hash_id);
    }
    }
    else if(m_LAYER_INDEX == end) { 
      if (hash_id < (unsigned int)(m_layer_vec.end() - m_layer_vec.begin())) {
    id = m_layer_vec[hash_id];
    result = 0;
      } 
      else 
    {
      ATH_MSG_ERROR("hash_id out of range " << hash_id);
    }
    }
  }
  return(result);
}
 
int  CaloLVL1_ID::get_hash  (const Identifier& id, IdentifierHash& hash_id, const IdContext* context) const
{
  hash_id = 0;
  int result = 1;
 
  size_t begin = (context) ? context->begin_index(): 0;
  size_t end   = (context) ? context->end_index()  : 0; 
 
  if (0 == begin) {
    if (m_REGION_INDEX  == end) {
      Identifier redId = region_id (id);
      std::vector<Identifier>::const_iterator it = std::lower_bound(m_region_vec.begin(),m_region_vec.end(),redId);
      if ( it != m_region_vec.end() ){
    hash_id = it - m_region_vec.begin();
    result = 0;
      }
    }
    else if (m_PHI_INDEX  == end) {
 
      Identifier redId = tower_id (id);
 
      std::vector<Identifier>::const_iterator it = std::lower_bound(m_tower_vec.begin(),m_tower_vec.end(),redId);
      if ( it != m_tower_vec.end() ){
    hash_id = it - m_tower_vec.begin();
    result = 0;
      }
    }
    else if (m_LAYER_INDEX  == end) {
 
      std::vector<Identifier>::const_iterator it = std::lower_bound(m_layer_vec.begin(),m_layer_vec.end(),id);
      if ( it != m_layer_vec.end() ){
    hash_id = it - m_layer_vec.begin();
    result = 0;
      }
    }
 
    else {
      std::string errorMessage =
        "Error in CaloLVL1_ID::get_hash, invalid context ";
      throw CaloID_Exception(errorMessage , 10);
    }
  }
 
  return (result);
}
 
 
 
 
int  CaloLVL1_ID::initialize_from_dictionary (const IdDictMgr& dict_mgr)
{
  ATH_MSG_INFO("initialize_from_dictionary");
 
  // Check whether this helper should be reinitialized
  if (!reinitialize(dict_mgr)) {
    ATH_MSG_DEBUG("Request to reinitialize not satisfied - tags have not changed");
    return (0);
  }
  else {
    ATH_MSG_DEBUG("(Re)initialize");
  }
 
  
  // init base object
  if(AtlasDetectorID::initialize_from_dictionary(dict_mgr)) return (1);
 
  // Register version of the Calorimeter dictionary
  if (register_dict_tag(dict_mgr, "Calorimeter")) return(1);
 
  m_dict = dict_mgr.find_dictionary ("Calorimeter"); 
  if(!m_dict) 
    {
      ATH_MSG_ERROR("initialize_from_dict - cannot access LVL1Calorimeter dictionary");
      return(1);
    }
  
  // Initialize the field indices
  if(initLevelsFromDict()) return (1);
 
 
   // Find values for the calo and  LVL1 (neg) fields
    int caloValue   = -1;
    if (m_dict->get_label_value("subdet", "Calorimeter", caloValue)) 
      {
    ATH_MSG_ERROR("Could not get value for label 'Calorimeter' of field 'subdet' in dictionary " << m_dict->name());
        return (1);
      }
 
    int lvl1CaloValue   = -1;
    // negative half
    //    if (m_dict->get_label_value("DetZside", "negative_lvl1_side", lvl1CaloValue)) 
    // positive half  FLG 12 Jul 07: negative side -> problem for test beam
    if (m_dict->get_label_value("DetZside", "positive_lvl1_side", lvl1CaloValue)) 
      {
    ATH_MSG_ERROR("Could not get value for label 'positive_lvl1_side' of field 'DetZside in dictionary" << m_dict->name());
    return (1);
    }
 
    // Set up id for region and range prefix
    // NOTE: negative value is good enough to get multirange since the
    // regions are symmetric in +/-eta
    // FLG Jul 07: EXCEPT FOR CTB !!!!!!!!!!
 
    ExpandedIdentifier reg_id;
    reg_id.add(caloValue);
    reg_id.add(lvl1CaloValue); 
    Range prefix;
    m_full_region_range = m_dict->build_multirange(reg_id, group(), prefix, "region");
    m_full_tower_range = m_dict->build_multirange(reg_id, group(), prefix, "phi");
    m_full_layer_range = m_dict->build_multirange(reg_id, group(), prefix);
 
    // Setup the hash tables
    if(init_hashes()) return (1);
 
    // Setup hash tables for finding neighbors
    if(init_neighbors()) return (1);     
 
    ATH_MSG_DEBUG("CaloLVL1_ID::initialize_from_dict : ");
    ATH_MSG_DEBUG(" tower range -> " << (std::string)m_full_tower_range);
    ATH_MSG_DEBUG(" layer range -> " << (std::string)m_full_layer_range);
 
    // Setup for hash calculation
 
    // Regions have uniform eta/phi granularity 
    // The lookup table only needs to contain the
    // hash offset for each region, the first eta index
    // and the number of phi cells.
 
    // The implementation requires:
 
    //   1) a lookup table for each region containing hash offset,
    //      etamin and nphi
    //   2) a decoder to access the "index" corresponding to the
    //      pnz/samp/reg fields. These fields use 6 bits, so the
    //      vector has a length of 64 for 16 regions.
 
 
    // Create decoder for fields pnz to region
    IdDictFieldImplementation::size_type bits = 
    m_lvl1_impl.bits() +
    m_sampling_impl.bits() +
    m_region_impl.bits();
    IdDictFieldImplementation::size_type bits_offset = m_lvl1_impl.bits_offset();
    m_pnz_reg_impl.set_bits(bits, bits_offset);
    int size = (1 << bits);
 
    // Set up vector as lookup table for hash calculation.
    m_hash_calcs.resize(size);
 
    for (unsigned int i = 0; i < m_region_hash_max; ++i) {
 
      Identifier regId = region_id(i) ;
 
      HashCalc hc;
      
      int etamin = eta_min(regId);
      Identifier min = tower_id ( regId, etamin, 0);
      IdentifierHash min_hash = tower_hash_binary_search(min);
      hc.m_hash   = min_hash;
      hc.m_etamin = etamin;
      hc.m_nphi   = phi_max(min)+1 ;
      m_hash_calcs[m_pnz_reg_impl.unpack(min)] = hc;
 
      if (m_pnz_reg_impl.unpack(min) >= size) 
    {
      ATH_MSG_DEBUG("Min > " << size);
      ATH_MSG_DEBUG(" " << show_to_string(min));
      ATH_MSG_DEBUG(" " << m_pnz_reg_impl.unpack(min));
    }
    }
 
    // Check hash calculation
    for (unsigned int i = 0; i < m_tower_hash_max; ++i) {
    Identifier id = tower_id(i);
    if (tower_hash(id) != i) 
      {
        ATH_MSG_ERROR("*****  Error tower ranges, id, hash, i = " << show_to_string(id));
        ATH_MSG_ERROR(" , " << tower_hash(id));
        ATH_MSG_ERROR(" , " << i);
      }
    }
    
  return 0;
 
}
 
 
 
 
int CaloLVL1_ID::eta_min(const Identifier regId) const
{
  ExpandedIdentifier expId;
  IdContext region_cntxt = region_context();
  if(!get_expanded_id(regId, expId, &region_cntxt)) {
    int result = -999;
    for (unsigned int i = 0; i < m_full_tower_range.size(); ++i) {
      const Range& range = m_full_tower_range[i];
      if (range.match(expId)) {
    const Range::field& eta_field = range[m_ETA_INDEX];
    if (not eta_field.empty()) {
      int etamin = eta_field.get_minimum();
      if (-999 == result) {
        result = etamin;
      }
      else {
        if (etamin < result) result = etamin;
      }
    }
      }
    }
    return (result);
  }
  return (-999);
}
 
int CaloLVL1_ID::eta_max(const Identifier regId) const
{
  ExpandedIdentifier expId;
  IdContext region_cntxt = region_context();
  if(!get_expanded_id(regId, expId, &region_cntxt)) {
    int result = -999;
    for (unsigned int i = 0; i < m_full_tower_range.size(); ++i) {
      const Range& range = m_full_tower_range[i];
      if (range.match(expId)) {
    const Range::field& eta_field = range[m_ETA_INDEX];
    if (not eta_field.empty()) {
      int etamax = eta_field.get_maximum();
      if (result < etamax) result = etamax;
    }
      }
    }
    return (result);
  }
  return (-999);  // default
}
 
int CaloLVL1_ID::phi_max(const Identifier regId) const
{
  ExpandedIdentifier expId;
  IdContext region_cntxt = region_context();
  if(!get_expanded_id(regId, expId, &region_cntxt)) {
    int result = -999;
    for (unsigned int i = 0; i < m_full_tower_range.size(); ++i) {
      const Range& range = m_full_tower_range[i];
      if (range.match(expId)) {
    const Range::field& phi_field = range[m_PHI_INDEX];
    if (not phi_field.empty()) {
      int phimax = phi_field.get_maximum();
      if (result < phimax) result = phimax;
    }
      }
    }
    return (result);
  }
  return (-999);  // default
}
 
int CaloLVL1_ID::layer_max(const Identifier regId) const
{
  ExpandedIdentifier expId;
  IdContext region_cntxt = region_context();
  if(!get_expanded_id(regId, expId, &region_cntxt)) {
    int result = -999;
    for (unsigned int i = 0; i < m_full_layer_range.size(); ++i) {
      const Range& range = m_full_layer_range[i];
      if (range.match(expId)) {
    const Range::field& lay_field = range[m_LAYER_INDEX];
    if (not lay_field.empty()) {
      int laymax = lay_field.get_maximum();
      if (result < laymax) result = laymax;
    }
      }
    }
    return (result);
  }
  return (-999);  // default
}
 
int             
CaloLVL1_ID::get_prev_in_phi(const IdentifierHash& id, IdentifierHash& prev) const
{
    unsigned short index = id;
    if (index < m_prev_phi_vec.size()) {
        if (m_prev_phi_vec[index] == NOT_VALID_HASH) return (1);
        prev =  m_prev_phi_vec[index];
        return (0);
    }
    return (1);
}
 
int             
CaloLVL1_ID::get_next_in_phi(const IdentifierHash& id, IdentifierHash& next) const
{
    unsigned short index = id;
    if (index < m_next_phi_vec.size()) {
        if (m_next_phi_vec[index] == NOT_VALID_HASH) return (1);
        next =  m_next_phi_vec[index];
        return (0);
    }
    return (1);
}
 
int             
CaloLVL1_ID::get_prev_in_eta(const IdentifierHash& id, IdentifierHash& prev) const
{
    unsigned short index = id;
    if (index < m_prev_eta_vec.size()) {
        if (m_prev_eta_vec[index] == NOT_VALID_HASH) return (1);
        prev =  m_prev_eta_vec[index];
        return (0);
    }
    return (1);
}
 
int
CaloLVL1_ID::get_next_in_eta(const IdentifierHash& id, IdentifierHash& next) const
{
    unsigned short index = id;
    if (index < m_next_eta_vec.size()) {
        if (m_next_eta_vec[index] == NOT_VALID_HASH) return (1);
        next =  m_next_eta_vec[index];
        return (0);
    }
    return (1);
}
 
 
  int  CaloLVL1_ID::get_expanded_id  (const Identifier& id, ExpandedIdentifier& exp_id, const IdContext* context) const
{
    // We assume that the context is >= region
    exp_id.clear();
    exp_id << calo_field_value()
       << pos_neg_z(id)
       << sampling(id)
       << region(id);
    if(context && context->end_index() >= m_ETA_INDEX) {
    exp_id << eta(id);
    if(context->end_index() >= m_PHI_INDEX) {
        exp_id << phi(id);
        if(context->end_index() >= m_LAYER_INDEX) {
        exp_id << layer(id);
        }
    }
    }
    return (0);
}
 
void CaloLVL1_ID::tower_id_checks   ( int pos_neg_z, int sampling, int region,
                      int eta,       int phi ) const
{  
  // Fill expanded id
  ExpandedIdentifier id(calo_exp());
  id << pos_neg_z << sampling << region << eta << phi;
 
  if (!m_full_tower_range.match(id)) { 
    std::string errorMessage = "CaloLVL1_ID::tower_id() result is not OK: ID, range = "
      + std::string(id) + " , " + (std::string)m_full_tower_range;
    throw CaloID_Exception(errorMessage , 2);
  }
}
 
 
void CaloLVL1_ID::tower_id_checks   ( const Identifier regionId,
                      int eta,  int phi ) const 
{
  // Fill expanded id
    ExpandedIdentifier id; 
 
    IdContext context = region_context();
    if (get_expanded_id(regionId, id, &context)) {
      std::string errorMessage = "CaloLVL1_ID::tower_id(regionId) result is not OK: ID= "
                           + show_to_string(regionId) ;
      throw CaloID_Exception(errorMessage , 2);
    }
 
    id << eta << phi;
 
    if (!m_full_tower_range.match(id)) {
      std::string errorMessage = "CaloLVL1_ID::tower_id(regionId,field values) result is not OK: ID, range = "
                                + std::string(id) + " , " + (std::string)m_full_tower_range;
      throw CaloID_Exception(errorMessage , 2);
    }
}
 
void CaloLVL1_ID::region_id_checks (int pos_neg_z, int sampling, int region)const 
{
    // Fill expanded id
    ExpandedIdentifier id(calo_exp());
    id << pos_neg_z << sampling << region ;
 
    if (!m_full_region_range.match(id)) { 
      std::string errorMessage = "CaloLVL1_ID::region_id() result is not OK: ID, range = "
    + std::string(id) + " , " + (std::string)m_full_region_range;
      throw CaloID_Exception(errorMessage , 2);
  }
}
 
void CaloLVL1_ID::layer_id_checks   ( int pos_neg_z, int sampling, int region,
                      int eta,       int phi,      int layer ) const
{  
    // Fill expanded id
    ExpandedIdentifier id(calo_exp());
    id << pos_neg_z << sampling << region << eta << phi << layer;
 
    if (!m_full_layer_range.match(id)) { 
      std::string errorMessage = "CaloLVL1_ID::layer_id(field values) result is not OK: ID, range = "
                                + std::string(id) + " , " + (std::string)m_full_layer_range;
      throw CaloID_Exception(errorMessage , 2);
    }
}
 
void CaloLVL1_ID::layer_id_checks   ( const Identifier towerId,
                      int layer ) const
{
    // Fill expanded id
    ExpandedIdentifier id; 
 
    IdContext context = layer_context();
    if (get_expanded_id(towerId, id, &context)) {
      std::string errorMessage = "CaloLVL1_ID::layer_id(towerId, layer) result is not OK: ID= "
                           + show_to_string(towerId) ;
      throw CaloID_Exception(errorMessage , 2);
    }
 
    id << layer;
 
    if (!m_full_layer_range.match(id)) {
      std::string errorMessage = "CaloLVL1_ID::layer_id(towerId) result is not OK: ID, range = "
                                + (std::string)id + " , " + (std::string)m_full_layer_range;
      throw CaloID_Exception(errorMessage , 2);
    }
}
 
 
int   CaloLVL1_ID::initLevelsFromDict()
{
  if(!m_dict) 
    {
      ATH_MSG_ERROR("initLevelsFromDict - dictionary NOT initialized");
      return (1);
    }
 
  // Find out which identifier field corresponds to each level.
 
  m_CALO_INDEX       = 999 ;
  m_DETZSIDE_INDEX   = 999 ;
  m_SAMPLING_INDEX   = 999 ; 
  m_REGION_INDEX     = 999 ;
  m_ETA_INDEX        = 999 ;
  m_PHI_INDEX        = 999 ;
  m_LAYER_INDEX      = 999 ;
 
  // Save index to a LVL1 region for unpacking - search with region name
  const IdDictRegion* reg = m_dict->find_region("Lvl1_0");
  if (reg) 
    {
      m_lvl1_region_index = reg->index();
    }
  else 
    {
      ATH_MSG_ERROR("initLevelsFromDict - unable to find lvl1 region ");
      return (1);
    }
  
  // Fing a LVL1 region
  const IdDictField* field = m_dict->find_field("subdet") ;
  if (field) {
    m_CALO_INDEX = field->index();
  }
  else 
    {
      ATH_MSG_ERROR("initLevelsFromDict - unable to find 'subdet' field ");
      return (1);
    }
  
  field = m_dict->find_field("DetZside") ;
  if (field) {
    m_DETZSIDE_INDEX = field->index();
  }
  else 
    {
      ATH_MSG_ERROR("initLevelsFromDict - unable to find 'DetZside' field ");
      return (1);
    }
 
 field = m_dict->find_field("LVL1sampling") ;
  if (field) {
    m_SAMPLING_INDEX = field->index();
  }
  else 
    {
      ATH_MSG_ERROR("initLevelsFromDict - unable to find 'LVL1sampling' field ");
      return (1);
    }
  
  field = m_dict->find_field("region") ;
  if (field) {
    m_REGION_INDEX = field->index();
  }
  else 
    {
      ATH_MSG_ERROR("initLevelsFromDict - unable to find 'region' field ");
      return (1);
  }
 
  field = m_dict->find_field("eta") ;
  if (field) {
    m_ETA_INDEX = field->index();
  }
  else 
    {
      ATH_MSG_ERROR("initLevelsFromDict - unable to find 'eta' field ");
      return (1);
    }
  
  field = m_dict->find_field("phi") ;
  if (field) {
    m_PHI_INDEX = field->index();
  }
  else 
    {
      ATH_MSG_ERROR("initLevelsFromDict - unable to find 'phi' field ");
      return (1);
    }
  
  field = m_dict->find_field("layer") ;
  if (field) {
    m_LAYER_INDEX = field->index();
  }
  else 
    {
      ATH_MSG_ERROR("initLevelsFromDict - unable to find 'layer' field ");
      return (1);
    }
  
  // Set the field implementations
 
  const IdDictRegion& region = m_dict->region(m_lvl1_region_index);
 
  m_calo_impl     = region.implementation(m_CALO_INDEX);
  m_lvl1_impl     = region.implementation(m_DETZSIDE_INDEX);
  m_sampling_impl = region.implementation(m_SAMPLING_INDEX);
  m_region_impl   = region.implementation(m_REGION_INDEX);
  m_eta_impl      = region.implementation(m_ETA_INDEX);
  m_phi_impl      = region.implementation(m_PHI_INDEX);
  m_layer_impl    = region.implementation(m_LAYER_INDEX);
 
  ATH_MSG_DEBUG("decode index and bit fields for each level: ");
  ATH_MSG_DEBUG("calo  " << m_calo_impl.show_to_string());
  ATH_MSG_DEBUG("detzside  " << m_lvl1_impl.show_to_string());
  ATH_MSG_DEBUG("samp  " << m_sampling_impl.show_to_string());
  ATH_MSG_DEBUG("reg  " << m_region_impl.show_to_string());
  ATH_MSG_DEBUG("eta  " << m_eta_impl.show_to_string());
  ATH_MSG_DEBUG("phi  " << m_phi_impl.show_to_string());
  ATH_MSG_DEBUG("layer  " << m_layer_impl.show_to_string());
 
  return(0) ;
}
 
 
int   CaloLVL1_ID::init_hashes()
{
  // tower hash
  m_tower_hash_max = m_full_tower_range.cardinality();
  m_tower_vec.resize(m_tower_hash_max);
  unsigned int nids = 0;
  std::set<Identifier> ids;
  for (unsigned int i = 0; i < m_full_tower_range.size(); ++i) {
    const Range& range = m_full_tower_range[i];
    ConstRangeIterator rit(range);
    auto first = rit.begin();
    auto last  = rit.end();
    for (; first != last; ++first) {
      const ExpandedIdentifier& exp_id = (*first);
      Identifier tow_id = tower_id   ( exp_id[m_DETZSIDE_INDEX],
                       exp_id[m_SAMPLING_INDEX], 
                       exp_id[m_REGION_INDEX] ,
                       exp_id[m_ETA_INDEX] ,
                       exp_id[m_PHI_INDEX] ) ;
      if(!(ids.insert(tow_id)).second)
    {
      ATH_MSG_ERROR("init_hashes duplicated id for TT id. nids= " << nids << " compact Id " << show_to_string(tow_id));
    }
      nids++;
    }
  }
  if(ids.size() != m_tower_hash_max) 
    {
      ATH_MSG_ERROR("init_hashes set size NOT EQUAL to hash max. size " << ids.size() << " hash max " << m_tower_hash_max);
      return (1);
  }
 
  nids=0;
  std::set<Identifier>::const_iterator first = ids.begin();
  std::set<Identifier>::const_iterator last  = ids.end();
  for (;first != last && nids < m_tower_vec.size(); ++first) {
    m_tower_vec[nids] = (*first) ;
    nids++;
  }
 
  // layer hash
  m_layer_hash_max = m_full_layer_range.cardinality();
  m_layer_vec.resize(m_layer_hash_max);
  nids = 0;
  ids.clear();
  for (unsigned int i = 0; i < m_full_layer_range.size(); ++i) 
    {
      const Range& range = m_full_layer_range[i];
      ConstRangeIterator rit(range);
      auto first = rit.begin();
      auto last  = rit.end();
      for (; first != last; ++first) 
    {
      const ExpandedIdentifier& exp_id = (*first);
      Identifier lay_id = layer_id   ( exp_id[m_DETZSIDE_INDEX],
                       exp_id[m_SAMPLING_INDEX], 
                       exp_id[m_REGION_INDEX] ,
                       exp_id[m_ETA_INDEX] ,
                       exp_id[m_PHI_INDEX] ,
                       exp_id[m_LAYER_INDEX] );
      if(!(ids.insert(lay_id)).second)
        {
          ATH_MSG_ERROR("init_hashes duplicated id for extended TT id. nids= " << nids << " compact Id " << show_to_string(lay_id));
        }
      nids++;
    }
    }
  if(ids.size() != m_layer_hash_max) 
    {
      ATH_MSG_ERROR("init_hashes set size NOT EQUAL to hash max. size " << ids.size() << " hash max " << m_layer_hash_max);
      return (1);
  }
 
  nids=0;
  first = ids.begin();
  last  = ids.end();
  for (;first != last && nids < m_layer_vec.size(); ++first) {
    m_layer_vec[nids] = (*first) ;
    nids++;
  }
 
 
  // region hash
  m_region_hash_max = m_full_region_range.cardinality();
  m_region_vec.resize(m_region_hash_max);
  nids = 0;
  ids.clear();
  for (unsigned int i = 0; i < m_full_region_range.size(); ++i) {
    const Range& range = m_full_region_range[i];
    ConstRangeIterator rit(range);
    auto first = rit.begin();
    auto last  = rit.end();
    for (; first != last; ++first) {
      const ExpandedIdentifier& exp_id = (*first);
      Identifier reg_id = region_id   ( exp_id[m_DETZSIDE_INDEX],
                    exp_id[m_SAMPLING_INDEX], 
                    exp_id[m_REGION_INDEX] );
      if(!(ids.insert(reg_id)).second)
    {
      ATH_MSG_ERROR("init_hashes duplicated id for region id. nids= " << nids << " compact Id " << show_to_string(reg_id));
    }
      nids++;
    }
  }
  if(ids.size() != m_region_hash_max) 
    {
      ATH_MSG_ERROR("init_hashes set size NOT EQUAL to region hash max. size " << ids.size() << " region hash max " << m_region_hash_max);
      return (1);
    }
  nids=0;
  first = ids.begin();
  last  = ids.end();
  for (;first != last && nids < m_region_vec.size(); ++first) {
    m_region_vec[nids] = (*first) ;
    nids++;
  }
 
  return (0);                   
}
 
 
 
int   CaloLVL1_ID::init_neighbors()
{
  m_prev_phi_vec.resize(m_tower_hash_max, NOT_VALID_HASH);
  m_next_phi_vec.resize(m_tower_hash_max, NOT_VALID_HASH);
  m_prev_eta_vec.resize(m_tower_hash_max, NOT_VALID_HASH);
  m_next_eta_vec.resize(m_tower_hash_max, NOT_VALID_HASH);
  for (unsigned int i = 0; i < m_full_tower_range.size(); ++i) {
    const Range& range = m_full_tower_range[i];
    ConstRangeIterator rit(range);
    const Range::field& eta_field = range[m_ETA_INDEX];
    const Range::field& phi_field = range[m_PHI_INDEX];
    auto first = rit.begin();
    auto last  = rit.end();
    for (; first != last; ++first) {
      const ExpandedIdentifier& exp_id = (*first);
      ExpandedIdentifier::element_type previous_eta;
      ExpandedIdentifier::element_type next_eta;
      ExpandedIdentifier::element_type previous_phi;
      ExpandedIdentifier::element_type next_phi;
      bool peta = eta_field.get_previous(exp_id[m_ETA_INDEX], previous_eta);
      bool neta = eta_field.get_next    (exp_id[m_ETA_INDEX], next_eta);
      bool pphi = phi_field.get_previous(exp_id[m_PHI_INDEX], previous_phi);
      bool nphi = phi_field.get_next    (exp_id[m_PHI_INDEX], next_phi);
      
      IdContext tcontext = tower_context();
      
      // Get and save region id to speed things up
      Identifier reg_id = region_id   ( exp_id[m_DETZSIDE_INDEX],
                    exp_id[m_SAMPLING_INDEX], 
                    exp_id[m_REGION_INDEX] );
      
      // First get primary hash id
      IdentifierHash hash_id;
      Identifier id = tower_id (reg_id, 
                exp_id[m_ETA_INDEX],
                exp_id[m_PHI_INDEX]);
      if (get_hash(id, hash_id,&tcontext)) 
    {
      ATH_MSG_ERROR("init_neighbors - unable to get hash, compact");
      return (1);
    }
      
      // index for the subsequent arrays
      unsigned short index = hash_id;
      assert (hash_id < m_prev_phi_vec.size());
      assert (hash_id < m_next_phi_vec.size());
      assert (hash_id < m_prev_eta_vec.size());
      assert (hash_id < m_next_eta_vec.size());
 
      if (pphi) {
    // Get previous phi hash id
    id = tower_id (reg_id, 
               exp_id[m_ETA_INDEX],
               previous_phi);
    // forward to compact -> hash
    if (get_hash(id, hash_id,&tcontext)) 
      {
        ATH_MSG_ERROR("init_neighbors - unable to get previous phi hash, exp/compact");
        return (1);
      }
    m_prev_phi_vec[index] = hash_id;
      }
 
      if (nphi) {
    // Get next phi hash id
    id = tower_id (reg_id, 
               exp_id[m_ETA_INDEX],
               next_phi);
    // forward to compact -> hash
    if (get_hash(id, hash_id,&tcontext)) 
      {
        ATH_MSG_ERROR("init_neighbors - unable to get next phi hash, exp/compact");
        return (1);
    }
    m_next_phi_vec[index] = hash_id;
      }
      if (peta) {
    // Get previous eta hash id
    id = tower_id (reg_id, 
               previous_eta,
               exp_id[m_PHI_INDEX]);
    // forward to compact -> hash
    if (get_hash(id, hash_id,&tcontext)) 
      {
        ATH_MSG_ERROR("init_neighbors - unable to get previous eta hash, exp/compact");
        return (1);
      }
    m_prev_eta_vec[index] = hash_id;
      }
      
      if (neta) {
    // Get next eta hash id
    id = tower_id (reg_id, 
               next_eta,
               exp_id[m_PHI_INDEX]);
    // forward to compact -> hash
    if (get_hash(id, hash_id,&tcontext)) 
      {
        ATH_MSG_ERROR("init_neighbors - unable to get next eta hash, exp/compact");
        return (1);
      }
    m_next_eta_vec[index] = hash_id;
      } // end neta cond
    } // end loop on identifiers
  } // end loop on ranges
  return (0);
}