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Invocation.hpp
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Invocation.hpp
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/******************************************************************************
* Copyright (c) 2011, Michael P. Gerlek (mpg@flaxen.com)
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Hobu, Inc. or Flaxen Geo Consulting nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
****************************************************************************/
#pragma once
#include <pdal/pdal_internal.hpp>
#include "Script.hpp"
#include "Environment.hpp"
#include <pdal/Dimension.hpp>
#include <pdal/PointView.hpp>
namespace pdal
{
namespace plang
{
class PDAL_DLL Invocation
{
public:
Invocation(const Script&);
~Invocation();
void compile();
void resetArguments();
// creates a Python variable pointing to a (one dimensional) C array
// adds the new variable to the arguments dictionary
void insertArgument(std::string const& name,
uint8_t* data,
Dimension::Type t,
point_count_t count);
void *extractResult(const std::string& name,
Dimension::Type dataType);
bool hasOutputVariable(const std::string& name) const;
// returns true iff the called python function returns true,
// as would be used for a predicate function
// (that is, the return value is NOT an error indicator)
bool execute();
// after a call to execute, this function will return you a list of
// the names in the 'outs' dictionary (this is used by the
// BufferedInvocation class to find the returned data -- faster to
// examine what's already in there than it is to iterate over all the
// possible names from the schema)
void getOutputNames(std::vector<std::string>& names);
void begin(PointView& view, MetadataNode m);
void end(PointView& view, MetadataNode m);
private:
void cleanup();
Script m_script;
PyObject* m_bytecode;
PyObject* m_module;
PyObject* m_dictionary;
PyObject* m_function;
PyObject* m_varsIn;
PyObject* m_varsOut;
PyObject* m_scriptArgs;
PyObject* m_scriptResult;
std::vector<PyObject*> m_pyInputArrays;
Invocation& operator=(Invocation const& rhs); // nope
std::vector<void *> m_buffers;
PyObject* m_metadata_PyObject;
PyObject* m_schema_PyObject;
PyObject* m_srs_PyObject;
};
} // namespace plang
} // namespace pdal