ReadMetadataElement.cc

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// This file is part of the "NcML Module" project, a BES module designed
// to allow NcML files to be used to be used as a wrapper to add
// AIS to existing datasets of any format.
//
// Copyright (c) 2009 OPeNDAP, Inc.
// Author: Michael Johnson  <m.johnson@opendap.org>
//
// For more information, please also see the main website: http://opendap.org/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// Please see the files COPYING and COPYRIGHT for more information on the GLPL.
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
#include "ReadMetadataElement.h"
#include "NetcdfElement.h"
#include "NCMLDebug.h"
#include "NCMLParser.h"
#include "NCMLUtil.h"

namespace ncml_module
{

  const string ReadMetadataElement::_sTypeName = "readMetadata";
  const vector<string> ReadMetadataElement::_sValidAttributes = vector<string>();

  ReadMetadataElement::ReadMetadataElement()
  : RCObjectInterface()
  , NCMLElement(0)
  {
  }

  ReadMetadataElement::ReadMetadataElement(const ReadMetadataElement& proto)
  : RCObjectInterface()
  , NCMLElement(proto)
  {
  }

  ReadMetadataElement::~ReadMetadataElement()
  {
  }

  const string&
  ReadMetadataElement::getTypeName() const
  {
    return _sTypeName;
  }

  ReadMetadataElement*
  ReadMetadataElement::clone() const
  {
    return new ReadMetadataElement(*this);
  }

  void
  ReadMetadataElement::setAttributes(const XMLAttributeMap&  attrs)
  {
    // make sure that none are specifed, basically.  We'll list them out in here if we get any
    // which is why this rather than check map size and throw.
    validateAttributes(attrs, _sValidAttributes);
  }

  void
  ReadMetadataElement::handleBegin()
  {
    if (!_parser->isScopeNetcdf())
        {
          THROW_NCML_PARSE_ERROR(_parser->getParseLineNumber(),
              "Got <readMetadata/> while not within <netcdf>");
        }
    NetcdfElement* dataset = _parser->getCurrentDataset();
    VALID_PTR(dataset);

    // Like Highlander, there can be only one!
    if (dataset->getProcessedMetadataDirective())
      {
      THROW_NCML_PARSE_ERROR(_parser->getParseLineNumber(),
          "Got " + toString() +
          " element but we already got a metadata directive"
          " for the current dataset!  Only one may be specified.");
      }
    dataset->setProcessedMetadataDirective();
  }

  void
  ReadMetadataElement::handleContent(const string& content)
  {
    if (!NCMLUtil::isAllWhitespace(content))
      {
        THROW_NCML_PARSE_ERROR(_parser->getParseLineNumber(),
            "Got non-whitespace for element content and didn't expect it."
            " Element=" + toString() + " content=\"" +
            content + "\"");
      }
  }

  void
  ReadMetadataElement::handleEnd()
  {
  }

  string
  ReadMetadataElement::toString() const
  {
    return "<" + _sTypeName + ">";
  }
}