cpp/galago/contrib/indri/src/XMLWriter.cpp

   1 /*==========================================================================
   2  * Copyright (c) 2004 University of Massachusetts.  All Rights Reserved.
   3  *
   4  * Use of the Lemur Toolkit for Language Modeling and Information Retrieval
   5  * is subject to the terms of the software license set forth in the LICENSE
   6  * file included with this software, and also available at
   7  * http://www.lemurproject.org/license.html
   8  *
   9  *==========================================================================
  10  */
  11
  12
  13 //
  14 // XMLWriter
  15 //
  16 // 8 October 2003 - tds
  17 //
  18
  19 #include "indri/XMLWriter.hpp"
  20
  21 void indri::xml::XMLWriter::_writeChar( char ch, std::string& output ) const {
  22   output += ch;
  23 }
  24
  25 void indri::xml::XMLWriter::_writeTabs( int tabs, std::string& output ) const {
  26   for( int i=0; i<tabs; i++ ) {
  27     _writeChar( '\t', output );
  28   }
  29 }
  30
  31 void indri::xml::XMLWriter::_writeTag( const std::string& tag, const indri::xml::XMLNode::MAttributes& attributes, std::string& output, bool opening ) const {
  32   _writeChar( '<', output );
  33
  34   if( !opening ) {
  35     _writeChar( '/', output );
  36   }
  37   output += tag;
  38
  39   if( opening ) {
  40     indri::xml::XMLNode::MAttributes::const_iterator iter;
  41     for( iter = attributes.begin(); iter != attributes.end(); iter++ ) {
  42       _writeChar( ' ', output );
  43       output += iter->first;
  44
  45       _writeChar( '=', output );
  46       _writeChar( '\"', output );
  47       output += iter->second;
  48       _writeChar( '\"', output );
  49     }
  50   }
  51
  52   _writeChar( '>', output );
  53 }
  54
  55 void indri::xml::XMLWriter::_writeEndOfLine( std::string& output ) const {
  56   _writeChar( '\n', output );
  57 }
  58
  59 void indri::xml::XMLWriter::_writeXML( int tabs, const indri::xml::XMLNode* node, std::string& output ) const {
  60   // write opening tag
  61   _writeTabs( tabs, output );
  62   _writeTag( node->getName(), node->getAttributes(), output, true );
  63
  64   if( node->getChildren().size() ) {
  65     _writeEndOfLine( output );
  66
  67     for( unsigned int i=0; i<node->getChildren().size(); i++ ) {
  68       _writeXML( tabs+1, (node->getChildren())[i], output );
  69     }
  70
  71     _writeTabs( tabs, output );
  72   } else {
  73     output += node->getValue();
  74   }
  75
  76   _writeTag( node->getName(), node->getAttributes(), output, false );
  77   _writeEndOfLine( output );
  78 }
  79
  80 indri::xml::XMLWriter::XMLWriter( indri::xml::XMLNode* node ) : _node(node)
  81 {
  82 }
  83
  84 void indri::xml::XMLWriter::write( std::string& output ) {
  85   _writeXML( 0, _node, output );
  86 }
  87