nturi.cpp

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/* nturi.cpp */
/*
 * Copyright information and license terms for this software can be
 * found in the file LICENSE that is included with the distribution
 */
 
#include <algorithm>
#include "validator.h"
 
#define epicsExportSharedSymbols
#include <pv/nturi.h>
#include <pv/ntutils.h>
 
using namespace std;
using namespace epics::pvData;
 
namespace epics { namespace nt {
 
static NTFieldPtr ntField = NTField::get();
 
namespace detail {
 
 
NTURIBuilder::shared_pointer NTURIBuilder::addQueryString(std::string const & name)
{
    if (std::find(queryFieldNames.begin(), queryFieldNames.end(), name) != queryFieldNames.end())
        throw std::runtime_error("duplicate query field name");
 
    queryFieldNames.push_back(name);
    queryTypes.push_back(pvString);
 
    return shared_from_this();
}
 
NTURIBuilder::shared_pointer NTURIBuilder::addQueryDouble(std::string const & name)
{
    if (std::find(queryFieldNames.begin(), queryFieldNames.end(), name) != queryFieldNames.end())
        throw std::runtime_error("duplicate query field name");
 
    queryFieldNames.push_back(name);
    queryTypes.push_back(pvDouble);
 
    return shared_from_this();
}
 
NTURIBuilder::shared_pointer NTURIBuilder::addQueryInt(std::string const & name)
{
    if (std::find(queryFieldNames.begin(), queryFieldNames.end(), name) != queryFieldNames.end())
        throw std::runtime_error("duplicate query field name");
 
    queryFieldNames.push_back(name);
    queryTypes.push_back(pvInt);
 
    return shared_from_this();
}
 
StructureConstPtr NTURIBuilder::createStructure()
{
    FieldBuilderPtr builder = getFieldCreate()->
        createFieldBuilder()->
        setId(NTURI::URI)->
        add("scheme", pvString);
 
    if (authority)
        builder->add("authority", pvString);
 
    builder->add("path", pvString);
 
    if (!queryFieldNames.empty())
    {
        FieldBuilderPtr nestedBuilder = builder->
             addNestedStructure("query");
 
        vector<string>::size_type len = queryFieldNames.size();
        for (vector<string>::size_type i = 0; i < len; i++)
            nestedBuilder->add(queryFieldNames[i], queryTypes[i]);
 
        builder = nestedBuilder->endNested();
    }
 
    size_t extraCount = extraFieldNames.size();
    for (size_t i = 0; i< extraCount; i++)
        builder->add(extraFieldNames[i], extraFields[i]);
 
    StructureConstPtr s = builder->createStructure();
 
    reset();
    return s;
}
 
NTURIBuilder::shared_pointer NTURIBuilder::addAuthority()
{
    authority = true;
    return shared_from_this();
}
 
PVStructurePtr NTURIBuilder::createPVStructure()
{
    return getPVDataCreate()->createPVStructure(createStructure());
}
 
NTURIPtr NTURIBuilder::create()
{
    return NTURIPtr(new NTURI(createPVStructure()));
}
 
NTURIBuilder::NTURIBuilder()
{
    reset();
}
 
void NTURIBuilder::reset()
{
    queryFieldNames.clear();
    queryTypes.clear();
    authority = false;
}
 
NTURIBuilder::shared_pointer NTURIBuilder::add(string const & name, FieldConstPtr const & field)
{
    extraFields.push_back(field);
    extraFieldNames.push_back(name);
    return shared_from_this();
}
 
}
 
const std::string NTURI::URI("epics:nt/NTURI:1.0");
 
NTURI::shared_pointer NTURI::wrap(PVStructurePtr const & pvStructure)
{
    if(!isCompatible(pvStructure)) return shared_pointer();
    return wrapUnsafe(pvStructure);
}
 
NTURI::shared_pointer NTURI::wrapUnsafe(PVStructurePtr const & pvStructure)
{
    return shared_pointer(new NTURI(pvStructure));
}
 
bool NTURI::is_a(StructureConstPtr const & structure)
{
    return NTUtils::is_a(structure->getID(), URI);
}
 
bool NTURI::is_a(PVStructurePtr const & pvStructure)
{
    return is_a(pvStructure->getStructure());
}
 
bool NTURI::isCompatible(StructureConstPtr const & structure)
{
    if (!structure)
        return false;
 
    Result result(structure);
 
    result
        .is<Structure>()
        .has<Scalar>("scheme")
        .has<Scalar>("path")
        .maybeHas<Scalar>("authority")
        .maybeHas<Structure>("query");
 
    StructureConstPtr query(structure->getField<Structure>("query"));
    if (query) {
        Result r(query);
        StringArray const & names(query->getFieldNames());
        StringArray::const_iterator it;
 
        for (it = names.begin(); it != names.end(); ++it)
            r.has<ScalarArray>(*it);
 
        result |= r;
    }
 
    return result.valid();
}
 
 
bool NTURI::isCompatible(PVStructurePtr const & pvStructure)
{
    if(!pvStructure) return false;
 
    return isCompatible(pvStructure->getStructure());
}
 
bool NTURI::isValid()
{
    return true;
}
 
NTURIBuilderPtr NTURI::createBuilder()
{
    return NTURIBuilderPtr(new detail::NTURIBuilder());
}
 
 
PVStructurePtr NTURI::getPVStructure() const
{
    return pvNTURI;
}
 
 
PVStringPtr NTURI::getScheme() const
{
    return pvNTURI->getSubField<PVString>("scheme");
}
 
PVStringPtr NTURI::getAuthority() const
{
    return pvNTURI->getSubField<PVString>("authority");
}
 
PVStringPtr NTURI::getPath() const
{
    return pvNTURI->getSubField<PVString>("path");
}
 
PVStructurePtr NTURI::getQuery() const
{
    return pvNTURI->getSubField<PVStructure>("query");
}
 
StringArray const & NTURI::getQueryNames() const
{
    return pvNTURI->getSubField<PVStructure>("query")->getStructure()->getFieldNames();
}
 
PVFieldPtr NTURI::getQueryField(std::string const & name) const
{
    return pvNTURI->getSubField("query." + name);
}
 
NTURI::NTURI(PVStructurePtr const & pvStructure) :
    pvNTURI(pvStructure)
{}
 
 
}}