/* -------------------------------------------------------------------------- *
 *                                   OpenMM                                   *
 * -------------------------------------------------------------------------- *
 * This is part of the OpenMM molecular simulation toolkit.                   *
 * See https://openmm.org/development.                                        *
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 * Portions copyright (c) 2025 Stanford University and the Authors.           *
 * Authors: Peter Eastman                                                     *
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#include "openmm/CustomVolumeForce.h"
#include "openmm/internal/AssertionUtilities.h"
#include "openmm/internal/CustomVolumeForceImpl.h"

using namespace OpenMM;
using namespace std;

CustomVolumeForce::CustomVolumeForce(const string& energy) : energyExpression(energy) {
}

const string& CustomVolumeForce::getEnergyFunction() const {
    return energyExpression;
}

void CustomVolumeForce::setEnergyFunction(const std::string& energy) {
    energyExpression = energy;
}

int CustomVolumeForce::addGlobalParameter(const string& name, double defaultValue) {
    globalParameters.push_back(GlobalParameterInfo(name, defaultValue));
    return globalParameters.size()-1;
}

const string& CustomVolumeForce::getGlobalParameterName(int index) const {
    ASSERT_VALID_INDEX(index, globalParameters);
    return globalParameters[index].name;
}

void CustomVolumeForce::setGlobalParameterName(int index, const string& name) {
    ASSERT_VALID_INDEX(index, globalParameters);
    globalParameters[index].name = name;
}

double CustomVolumeForce::getGlobalParameterDefaultValue(int index) const {
    ASSERT_VALID_INDEX(index, globalParameters);
    return globalParameters[index].defaultValue;
}

void CustomVolumeForce::setGlobalParameterDefaultValue(int index, double defaultValue) {
    ASSERT_VALID_INDEX(index, globalParameters);
    globalParameters[index].defaultValue = defaultValue;
}

ForceImpl* CustomVolumeForce::createImpl() const {
    return new CustomVolumeForceImpl(*this);
}

int CustomVolumeForce::getNumGlobalParameters() const {
    return globalParameters.size();
}
