rosparam_utils.cpp

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// -*- mode: c++ -*-
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#include "jsk_topic_tools/rosparam_utils.h"

namespace jsk_topic_tools
{
  double getXMLDoubleValue(XmlRpc::XmlRpcValue val)
  {
    switch(val.getType())
    {
    case XmlRpc::XmlRpcValue::TypeInt:
    {
      return (double)((int)val);
    }
    case XmlRpc::XmlRpcValue::TypeDouble:
    {
      return (double)val;
    }
    default:
    {
      throw std::runtime_error("the value cannot be converted into double");
    }
    }
  }
  
  bool readVectorParameter(ros::NodeHandle& nh,
                           const std::string& param_name,
                           std::vector<double>& result)
  {
    if (nh.hasParam(param_name)) {
      XmlRpc::XmlRpcValue v;
      nh.param(param_name, v, v);
      if (v.getType() == XmlRpc::XmlRpcValue::TypeArray) {
        result.resize(v.size());
        for (size_t i = 0; i < v.size(); i++) {
          result[i] = getXMLDoubleValue(v[i]);
        }
        return true;
      }
      else {
        return false;
      }
    }
    else {
      return false;
    }
  }

  bool readVectorParameter(ros::NodeHandle& nh,
                           const std::string& param_name,
                           std::vector<std::vector<double> >& result)
  {
    if (nh.hasParam(param_name)) {
      XmlRpc::XmlRpcValue v_toplevel;
      nh.param(param_name, v_toplevel, v_toplevel);
      if (v_toplevel.getType() == XmlRpc::XmlRpcValue::TypeArray) {
        result.resize(v_toplevel.size());
        for (size_t i = 0; i < v_toplevel.size(); i++) {
          // ensure v[i] is an array
          XmlRpc::XmlRpcValue nested_v = v_toplevel[i];
          if (nested_v.getType() == XmlRpc::XmlRpcValue::TypeArray) {
            std::vector<double> nested_std_vector(nested_v.size());
            for (size_t j = 0; j < nested_v.size(); j++) {
              nested_std_vector[j] = getXMLDoubleValue(nested_v[j]);
            }
            result[i] = nested_std_vector;
          }
          else {
            return false;
          }
        }
        return true;
      }
      else {
        return false;
      }
    }
    else {
      return false;
    }
  }

  bool readVectorParameter(ros::NodeHandle& nh,
                           const std::string& param_name,
                           std::vector<std::vector<std::string> >& result)
  {
    if (nh.hasParam(param_name)) {
      XmlRpc::XmlRpcValue v_toplevel;
      nh.param(param_name, v_toplevel, v_toplevel);
      if (v_toplevel.getType() == XmlRpc::XmlRpcValue::TypeArray) {
        result.resize(v_toplevel.size());
        for (size_t i = 0; i < v_toplevel.size(); i++) {
          // ensure v[i] is an array
          XmlRpc::XmlRpcValue nested_v = v_toplevel[i];
          if (nested_v.getType() == XmlRpc::XmlRpcValue::TypeArray) {
            std::vector<std::string> nested_std_vector(nested_v.size());
            for (size_t j = 0; j < nested_v.size(); j++) {
              if (nested_v[j].getType() == XmlRpc::XmlRpcValue::TypeString) {
                nested_std_vector[j] = (std::string)nested_v[j];
              }
              else {
                return false;
              }
            }
            result[i] = nested_std_vector;
          }
          else {
            return false;
          }
        }
        return true;
      }
      else {
        return false;
      }
    }
    else {
      return false;
    }
  }
  
  bool readVectorParameter(ros::NodeHandle& nh,
                           const std::string& param_name,
                           std::vector<std::string>& result)
  {
    if (nh.hasParam(param_name)) {
      XmlRpc::XmlRpcValue v;
      nh.param(param_name, v, v);
      if (v.getType() == XmlRpc::XmlRpcValue::TypeArray) {
        result.resize(v.size());
        for (size_t i = 0; i < result.size(); i++) {
          if (v[i].getType() == XmlRpc::XmlRpcValue::TypeString) {
            result[i] = (std::string)v[i];
          }
          else {
            throw std::runtime_error(
              "the value cannot be converted into std::string");
          }
        }
        return true;
      }
      else {
        return false;
      }
    }
    else {
      return false;
    }
  }

  
}