//----------------------------------------------------------------------
// Includes
//----------------------------------------------------------------------
#include "MantidDataHandling/Load.h"
#include "MantidAPI/FileProperty.h"
#include "MantidAPI/IEventWorkspace.h"
#include "MantidAPI/IWorkspaceProperty.h"
#include "MantidKernel/ArrayProperty.h"
#include "MantidAPI/LoadAlgorithmFactory.h"
#include "MantidAPI/AlgorithmManager.h"
namespace Mantid
{
namespace DataHandling
{
// Register the algorithm into the algorithm factory
DECLARE_ALGORITHM(Load);
/// Sets documentation strings for this algorithm
void Load::initDocs()
{
this->setWikiSummary("Attempts to load a given file by finding an appropriate Load algorithm. ");
this->setOptionalMessage("Attempts to load a given file by finding an appropriate Load algorithm.");
}
using namespace Kernel;
using namespace API;
//--------------------------------------------------------------------------
// Public methods
//--------------------------------------------------------------------------
/// Default constructor
Load::Load() : IDataFileChecker(), m_baseProps()
{
}
/**
* Override setPropertyValue
* @param name The name of the property
* @param value The value of the property as a string
*/
void Load::setPropertyValue(const std::string &name, const std::string &value)
{
IDataFileChecker_sptr loader;
if( name == "Filename" )
{
// This call makes resolving the filename easier
IDataFileChecker::setPropertyValue(name, value);
loader = getFileLoader(getPropertyValue(name));
}
else
{
const std::string loaderName = getProperty("LoaderName");
if( !loaderName.empty() )
{
loader = boost::static_pointer_cast<IDataFileChecker>(
API::AlgorithmManager::Instance().createUnmanaged(loaderName));
loader->initialize();
}
}
if( loader ) declareLoaderProperties(loader);
// Set the property after some may have been redeclared
if( name != "Filename") IDataFileChecker::setPropertyValue(name, value);
}
//--------------------------------------------------------------------------
// Private methods
//--------------------------------------------------------------------------
/**
* Quick file always returns false here
* @param filePath :: File path
* @param nread :: Number of bytes read
* @param header :: A buffer containing the nread bytes
*/
bool Load::quickFileCheck(const std::string& filePath,size_t nread,const file_header& header)
{
(void)filePath; (void)nread; (void)header;
return false;
}
/**
* File check by looking at the structure of the data file
* @param filePath :: The full file path
* @returns -1
*/
int Load::fileCheck(const std::string& filePath)
{
(void)filePath;
return -1;
}
/**
* Get a shared pointer to the load algorithm with highest preference for loading
* @param filePath :: path of the file
* @returns A shared pointer to the unmanaged algorithm
*/
API::IDataFileChecker_sptr Load::getFileLoader(const std::string& filePath)
{
/* Open the file and read in the first bufferSize bytes - these will
* be used to determine the type of the file
*/
FILE* fp = fopen(filePath.c_str(), "rb");
if (fp == NULL)
{
throw Kernel::Exception::FileError("Unable to open the file:", filePath);
}
file_header header;
int nread = fread(&header,sizeof(unsigned char), g_hdr_bytes, fp);
// Ensure the character string is null terminated.
header.full_hdr[g_hdr_bytes] = '\0';
if (nread == -1)
{
fclose(fp);
}
if (fclose(fp) != 0)
{
throw std::runtime_error("Error while closing file \"" + filePath + "\"");
}
// Iterate through all loaders and attempt to find the best qualified for the job.
// Each algorithm has a quick and long file check. The long version returns an integer
// giving its certainty about be able to load the file. The highest wins.
std::vector<std::string> loaderNames = API::LoadAlgorithmFactory::Instance().getKeys();
int highestPref(0);
API::IDataFileChecker_sptr winningLoader;
std::vector<std::string>::const_iterator cend = loaderNames.end();
for( std::vector<std::string>::const_iterator citr = loaderNames.begin(); citr != cend;
++citr )
{
IDataFileChecker_sptr loader = API::LoadAlgorithmFactory::Instance().create(*citr);
if( loader->quickFileCheck(filePath, nread, header) )
{
int pref = loader->fileCheck(filePath);
// Can't just pick the first as there might be one later in the list with a higher
// preference
if( pref > highestPref )
{
highestPref = pref;
winningLoader = loader;
}
}
}
if( !winningLoader )
{
// Clear what may have been here previously
setPropertyValue("LoaderName", "");
throw std::runtime_error("Cannot find a loader for \"" + filePath + "\"");
}
setPropertyValue("LoaderName", winningLoader->name());
winningLoader->initialize();
return winningLoader;
}
/**
* Declare any additional properties of the concrete loader here
* @param loader A pointer to the concrete loader
*/
void Load::declareLoaderProperties(const IDataFileChecker_sptr loader)
{
// If we have switch loaders then the concrete loader will have different properties
// so take care of ensuring Load has the correct ones
const std::vector<Property*> existingProps = this->getProperties();
for( size_t i = 0; i < existingProps.size(); ++i )
{
const std::string name = existingProps[i]->name();
if( m_baseProps.find(name) != m_baseProps.end() ||
loader->existsProperty(name) )
{
continue;
}
this->removeProperty(name);
}
const std::vector<Property*> &loaderProps = loader->getProperties();
const std::string filePropName(loader->filePropertyName());
size_t numProps(loaderProps.size());
for (size_t i = 0; i < numProps; ++i)
{
Property* loadProp = loaderProps[i];
if( loadProp->name() == filePropName ) continue;
try
{
declareProperty(loadProp->clone(), loadProp->documentation());
}
catch(Exception::ExistsError&)
{
// Already exists as a static property
continue;
}
}
}
/// Initialisation method.
void Load::init()
{
std::vector<std::string> exts;
exts.push_back(".raw");
exts.push_back(".s*");
exts.push_back(".add");
exts.push_back(".nxs");
exts.push_back(".nx5");
exts.push_back(".xml");
exts.push_back(".n*");
exts.push_back(".dat");
exts.push_back(".txt");
exts.push_back(".csv");
exts.push_back(".spe");
declareProperty(new FileProperty("Filename", "", FileProperty::Load, exts),
"The name of the file to read, including its full or relative\n"
"path. (N.B. case sensitive if running on Linux).");
declareProperty(new WorkspaceProperty<Workspace>("OutputWorkspace", "",Direction::Output),
"The name of the workspace that will be created, filled with the\n"
"read-in data and stored in the Analysis Data Service.");
declareProperty("LoaderName", std::string(""), "A string containing the name of the concrete loader used",
Direction::Output);
// Save for later what the base Load properties are
const std::vector<Property*> & props = this->getProperties();
for( size_t i = 0; i < this->propertyCount(); ++i )
{
m_baseProps.insert(props[i]->name());
}
}
/**
* Executes the algorithm.
*/
void Load::exec()
{
const std::string loaderName = getPropertyValue("LoaderName");
if( loaderName.empty() )
{
throw std::invalid_argument("Cannot find loader, LoaderName property has not been set.");
}
IDataFileChecker_sptr loader = createLoader(loaderName,0,1);
g_log.information() << "Using " << loaderName << " version " << loader->version() << ".\n";
///get the list properties for the concrete loader load algorithm
const std::vector<Kernel::Property*> & loader_props = loader->getProperties();
// Loop through and set the properties on the sub algorithm
std::vector<Kernel::Property*>::const_iterator itr;
for (itr = loader_props.begin(); itr != loader_props.end(); ++itr)
{
const std::string propName = (*itr)->name();
if( this->existsProperty(propName) )
{
loader->setPropertyValue(propName, getPropertyValue(propName));
}
else if( propName == loader->filePropertyName() )
{
loader->setPropertyValue(propName, getPropertyValue("Filename"));
}
}
// Execute the concrete loader
loader->execute();
// Set the workspace. Deals with possible multiple periods
setOutputWorkspace(loader);
}
/**
* Create the concrete instance use for the actual loading.
* @param name :: The name of the loader to instantiate
* @param startProgress :: The percentage progress value of the overall
* algorithm where this child algorithm starts
* @param endProgress :: The percentage progress value of the overall
* algorithm where this child algorithm ends
* @param logging :: Set to false to disable logging from the child algorithm
*/
API::IDataFileChecker_sptr Load::createLoader(const std::string & name, const double startProgress,
const double endProgress, const bool logging) const
{
IDataFileChecker_sptr loader = boost::static_pointer_cast<IDataFileChecker>(
API::AlgorithmManager::Instance().createUnmanaged(name));
loader->initialize();
if( !loader )
{
throw std::runtime_error("Cannot create loader for \"" + getPropertyValue("Filename") + "\"");
}
//Set as a child so that we are in control of output storage
loader->setChild(true);
loader->setLogging(logging);
// If output workspaces are nameless, give them a temporary name to satisfy validator
const std::vector< Property*> &props = loader->getProperties();
for (unsigned int i = 0; i < props.size(); ++i)
{
if (props[i]->direction() == Direction::Output &&
dynamic_cast<IWorkspaceProperty*>(props[i]) )
{
if ( props[i]->value().empty() ) props[i]->setValue("LoadChildWorkspace");
}
}
if (startProgress >= 0. && endProgress > startProgress && endProgress <= 1.)
{
loader->addObserver(m_progressObserver);
setChildStartProgress(startProgress);
setChildEndProgress(endProgress);
}
return loader;
}
/**
* Set the output workspace(s) if the load's return workspace has type API::Workspace
* @param loader :: Shared pointer to load algorithm
*/
void Load::setOutputWorkspace(const API::IDataFileChecker_sptr loader)
{
// Go through each OutputWorkspace property and check whether we need to make a counterpart here
const std::vector<Property*> loaderProps = loader->getProperties();
const size_t count = loader->propertyCount();
for( size_t i = 0; i < count; ++i )
{
Property *prop = loaderProps[i];
if( dynamic_cast<IWorkspaceProperty*>(prop) && prop->direction() == Direction::Output )
{
const std::string & name = prop->name();
if( !this->existsProperty(name) )
{
declareProperty(new WorkspaceProperty<Workspace>(name, loader->getPropertyValue(name),
Direction::Output));
}
Workspace_sptr wkspace = getOutputWorkspace(name, loader);
setProperty(name, wkspace);
}
}
}
/**
* Return an output workspace property dealing with the lack of connection between of
* WorkspaceProperty types
* @param propName :: The name of the property
* @param loader :: The loader algorithm
* @returns A pointer to the OutputWorkspace property of the sub algorithm
*/
API::Workspace_sptr Load::getOutputWorkspace(const std::string & propName,
const API::IDataFileChecker_sptr loader) const
{
// @todo Need to try and find a better way using the getValue methods
try
{
return loader->getProperty(propName);
}
catch(std::runtime_error&)
{
}
// Try a MatrixWorkspace
try
{
MatrixWorkspace_sptr childWS = loader->getProperty(propName);
return childWS;
}
catch(std::runtime_error&)
{
}
// EventWorkspace
try
{
IEventWorkspace_sptr childWS = loader->getProperty(propName);
return childWS;
}
catch(std::runtime_error&)
{
}
return Workspace_sptr();
}
} // namespace DataHandling
} // namespace Mantid