Xerces C++ Problem - .NET Framework

mearvk

I am unable to get Xerces to write out attributes from a struct which
I am able to print out and verify is correct. The structs are defined
below as is subsection of the output.

Expand|Select|Wrap|Line Numbers

  
int DDAS_XML_Handler::writeResultDocument( int job_id, int

num_results, DDAS_CLIENT_RESULT_DATA* results )

{

try

{
 
DOMElement* data_row;

DOMElement* coeff;

DOMElement* root;
 
DOMAttr* sse_attr;

DOMAttr* bin_rep_attr;

DOMAttr* def_num_attr;

DOMAttr* index_attr;

DOMAttr* value_attr;

DOMAttr* job_id_attr;
 
XMLCh* data_row_ch      =

XMLString::transcode("data_row");

XMLCh* sse_ch           = XMLString::transcode("SSE");

XMLCh* bin_rep_ch       =

XMLString::transcode("binary_representation");

XMLCh* def_num_ch       =

XMLString::transcode("definition_number");

XMLCh* coeff_ch         =

XMLString::transcode("coefficient");

XMLCh* index_ch         =

XMLString::transcode("index");

XMLCh* value_ch         =

XMLString::transcode("value");

XMLCh* job_id_ch        =

XMLString::transcode("jobID");
 
//printDCRD(results);
 
//create a DOM

DOMImplementation* impl =

DOMImplementationRegistry::getDOMImplementation(XMLString::transcode("Range"));

DOMDocument* doc        = impl->createDocument(0,

XMLString::transcode("job_results"), 0);
 
//document root

root = doc->getDocumentElement();
 
//root's job ID attribute

job_id_attr     = doc->createAttribute(job_id_ch);
 
//add the job_id attribute to root tag

char* job_buffer = new char[128];

sprintf( job_buffer, "%i", job_id );

XMLString::trim(job_buffer);

job_id_attr-

                >setValue(XMLString::transcode(job_buffer));
 
root->setAttributeNode(job_id_attr);

delete[] job_buffer;
 
//for each data row

for( int i=0; i<num_results; i++ )

{

data_row        = doc-

                >createElement(data_row_ch);
 
sse_attr        = doc-

                >createAttribute(sse_ch);
 
bin_rep_attr    = doc-

                >createAttribute(bin_rep_ch);
 
def_num_attr    = doc-

                >createAttribute(def_num_ch);
 
//set SSE value

char* sse_buffer = new char[128];

sprintf( sse_buffer, "%f", results->SSEs[i] );
 
//set binary representation value

char* br_buffer = new char[128];

sprintf( br_buffer, "%s", results-

                >bin_reps[i] );
 
//set defintion number value

char* dn_buffer = new char[128];

sprintf( dn_buffer, "%s", results-

                >def_nums[i] );
 
//trim strings

XMLString::trim(sse_buffer);

XMLString::trim(br_buffer);

XMLString::trim(dn_buffer);
 
//convert to XMLCh*

XMLCh* sse_val     =

XMLString::transcode(sse_buffer);

XMLCh* bin_rep_val =

XMLString::transcode(br_buffer);

XMLCh* def_num_val =

XMLString::transcode(dn_buffer);
 
//set attr values

sse_attr    ->setValue(sse_val);

bin_rep_attr->setValue(bin_rep_val);

def_num_attr->setValue(def_num_val);
 
//append attribute nodes to data row

data_row->setAttributeNode(sse_attr);

data_row->setAttributeNode(bin_rep_attr);

data_row->setAttributeNode(def_num_attr);
 
//append data row to root

root->appendChild(data_row);
 
//free memory

delete[] sse_buffer;

delete[] br_buffer;

delete[] dn_buffer;

XMLString::release(&sse_val);

XMLString::release(&bin_rep_val);

XMLString::release(&def_num_val);
 
//handle coefficients on a per data row basis

for( unsigned int j=0; j<results->coefficients-

                >size; j++)
 
{

//create coefficient element

coeff = doc->createElement(coeff_ch);
 
//create attribute nodes

index_attr = doc-

                >createAttribute(index_ch);
 
value_attr = doc-

                >createAttribute(value_ch);
 
//request some space for conversion

char* index_buffer = new char[128];

char* value_buffer = new char[128];
 
//convert from numeric to char*

sprintf( index_buffer, "%i", results-

                >coefficients[i].index[j] );
 
sprintf( value_buffer, "%f", results-

                >coefficients[i].values[j] );
 
//remove whitespace

XMLString::trim(index_buffer);

XMLString::trim(value_buffer);
 
//create values as XMLCh*

XMLCh* index_val =

XMLString::transcode(index_buffer);

XMLCh* value_val =

XMLString::transcode(value_buffer);
 
//set values

index_attr->setValue(index_val);

value_attr->setValue(value_val);
 
coeff->setAttributeNode(index_attr);

coeff->setAttributeNode(value_attr);
 
//append coefficient to data row

data_row->appendChild(coeff);
 
//free memory

delete[] index_buffer;

delete[] value_buffer;
 
}//end inner for loop
 
}//end outer for loop
 
//DOM serializer

DOMWriter* writer = ((DOMImplementationLS*)impl)-

                >createDOMWriter();
 
//request some space for URL

char* buffer = new char[512];
 
//create URL based on job ID

sprintf( buffer, "%sjob_%u_results.xml",

DDAS_RESULT_URL, job_id );
 
//remove whitespace

XMLString::trim(buffer);
 
//create URL as XMLCh*

XMLCh* url_ch = XMLString::transcode(buffer);
 
//set output type

LocalFileFormatTarget local_file( url_ch );
 
//set some formatting options

if (writer-

                >canSetFeature(XMLUni::fgDOMWRTDiscardDefaultContent, true))
 
writer-

                >setFeature(XMLUni::fgDOMWRTDiscardDefaultContent, true);
 
if (writer-

                >canSetFeature(XMLUni::fgDOMWRTFormatPrettyPrint, true))
 
writer-

                >setFeature(XMLUni::fgDOMWRTFormatPrettyPrint, true);
 
//actually write the root node to file

writer->writeNode(&local_file, *root);
 
//free resources

writer  ->release();

doc     ->release();

delete[] buffer;
 
return 1;
 
}

catch( XMLException& e)

{

char* message =

XMLString::transcode( e.getMessage() );

cerr << "The following error occurred during

the DOM creation: " << message << endl;

XMLString::release( &message );

}

}

Here are the structs used:

Expand|Select|Wrap|Line Numbers

  
struct REGRESSION_COEFFICIENTS

{

//which column are talking about

int*            index;
 
//the value of the linear coefficient

double*         values;
 
//the size of the struct

unsigned int    size;

};
 
///A struct used to hold the client result data

struct DDAS_CLIENT_RESULT_DATA

{

/// The binary representation of the definition number -

serves to disambiguate endianess

char**          bin_reps;
 
/// The decimal representation of the combination of

independent variables used in this regression (1011 base 2 == 11 base

10)

char**          def_nums;
 
/// The sum of squared error for the linear regression

double*         SSEs;
 
/// How many results are contained in the struct

unsigned int   size;
 
//regression coefficients

REGRESSION_COEFFICIENTS* coefficients;

};

And here is a sample of the output:

[OUTPUT]

<data_row SSE="137.527403 " binary_represen tation="1010111 011111001"
definition_numb er="44793">
<coefficient index="0" value="-0.000977"/>
<coefficient index="1" value="0.000000 "/>
<coefficient index="2" value="0.000000 "/>
<coefficient index="3" value="-66123751426.362 999"/>
<coefficient index="4" value="0.000088 "/>
<coefficient index="5" value="10958014 73.097510"/>
<coefficient index="6" value="0.003840 "/>
<coefficient index="7" value="-26494374893.985 001"/>
<coefficient index="8" value="0.000000 "/>
<coefficient index="9" value="0.097907 "/>
<coefficient index="10" value="0.004219 "/>
<coefficient index="11" value="66123751 426.363098"/>
<coefficient index="12" value="0.000000 "/>
<coefficient index="13" value="-1095801473.1025 00"/>
<coefficient index="14" value="0.000000 "/>
<coefficient index="15" value="26494374 894.009701"/>
</data_row>

<data_row SSE="137.533380 " binary_represen tation=""
definition_numb er="">
<coefficient index="0" value="-0.001039"/>
<coefficient index="1" value="0.097757 "/>
<coefficient index="2" value="75825857 3.171398"/>
<coefficient index="3" value="-35123845436.044 098"/>
<coefficient index="4" value="0.000000 "/>
<coefficient index="5" value="0.000000 "/>
<coefficient index="6" value="-464164413.89040 3"/>
<coefficient index="7" value="0.024555 "/>
<coefficient index="8" value="0.000000 "/>
<coefficient index="9" value="0.000000 "/>
<coefficient index="10" value="-758258573.16723 3"/>
<coefficient index="11" value="35123845 436.044197"/>
<coefficient index="12" value="0.000016 "/>
<coefficient index="13" value="-0.004898"/>
<coefficient index="14" value="46416441 3.894253"/>
<coefficient index="15" value="0.000000 "/>
</data_row>

<data_row SSE="137.533796 " binary_represen tation="0111111 011P>V"
definition_numb er="32457">
<coefficient index="0" value="-0.001034"/>
<coefficient index="1" value="0.000000 "/>
<coefficient index="2" value="0.000000 "/>
<coefficient index="3" value="-35209041045.623 802"/>
<coefficient index="4" value="0.000000 "/>
<coefficient index="5" value="0.000000 "/>
<coefficient index="6" value="-425970878.52097 1"/>
<coefficient index="7" value="0.024583 "/>
<coefficient index="8" value="0.000000 "/>
<coefficient index="9" value="0.097997 "/>
<coefficient index="10" value="0.004175 "/>
<coefficient index="11" value="35209041 045.623802"/>
<coefficient index="12" value="-0.000016"/>
<coefficient index="13" value="-0.004899"/>
<coefficient index="14" value="42597087 8.524831"/>
<coefficient index="15" value="0.000000 "/>
</data_row>

[/OUTPUT]
Some of the output is correct, some is there but erroneous, some is
missing altogether. Each data_row element should have a
definition_numb er with some value between 0 and (2^16)-1. The binary
representation is merely the binary representation of the decimal
value. I have spent many hours trying to figure out what the error
is. Again, I am able to print the struct (printDCRD) at the beginning
of the method and verify that the data contained therein is correct
and present.

So, if anyone can lend me some attention cycles, I'd greatly
appreciate it.

Thanks ahead.

Jun 27 '08 #1

Subscribe Reply

1924

mearvk

On May 9, 7:26*pm, mearvk <mea...@gmail.c omwrote:

I am unable to get Xerces to write out attributes from a struct which
I am able to print out and verify is correct. The structs are defined
below as is subsection of the output.

Expand|Select|Wrap|Line Numbers

int DDAS_XML_Handler::writeResultDocument( int job_id, int

num_results, DDAS_CLIENT_RESULT_DATA* results )

* * * * {

* * * * * * * * try

* * * * * * * * {

* * * * * * * * DOMElement* data_row;

* * * * * * * * DOMElement* coeff;

* * * * * * * * DOMElement* root;

* * * * * * * * DOMAttr* sse_attr;

* * * * * * * * DOMAttr* bin_rep_attr;

* * * * * * * * DOMAttr* def_num_attr;

* * * * * * * * DOMAttr* index_attr;

* * * * * * * * DOMAttr* value_attr;

* * * * * * * * DOMAttr* job_id_attr;

* * * * * * * * XMLCh* data_row_ch * * *=

XMLString::transcode("data_row");

* * * * * * * * XMLCh* sse_ch * * * * * = XMLString::transcode("SSE");

* * * * * * * * XMLCh* bin_rep_ch * * * =

XMLString::transcode("binary_representation");

* * * * * * * * XMLCh* def_num_ch * * * =

XMLString::transcode("definition_number");

* * * * * * * * XMLCh* coeff_ch * * * * =

XMLString::transcode("coefficient");

* * * * * * * * XMLCh* index_ch * * * * =

XMLString::transcode("index");

* * * * * * * * XMLCh* value_ch * * * * =

XMLString::transcode("value");

* * * * * * * * XMLCh* job_id_ch * * * *=

XMLString::transcode("jobID");

* * * * * * * * //printDCRD(results);

* * * * * * * * //create a DOM

* * * * * * * * DOMImplementation* impl =

DOMImplementationRegistry::getDOMImplementation(XMLString::transcode("Range*"));

* * * * * * * * DOMDocument* doc * * * *= impl->createDocument(0,

XMLString::transcode("job_results"), 0);

* * * * * * * * //document root

* * * * * * * * root = doc->getDocumentElement();

* * * * * * * * //root's job ID attribute

* * * * * * * * job_id_attr * * = doc->createAttribute(job_id_ch);

* * * * * * * * //add the job_id attribute to root tag

* * * * * * * * char* job_buffer = new char[128];

* * * * * * * * sprintf( job_buffer, "%i", job_id );

* * * * * * * * XMLString::trim(job_buffer);

* * * * * * * * job_id_attr->setValue(XMLString::transcode(job_buffer));

* * * * * * * * root->setAttributeNode(job_id_attr);

* * * * * * * * delete[] job_buffer;

* * * * * * * * //for each data row

* * * * * * * * for( int i=0; i<num_results; i++ )

* * * * * * * * {

* * * * * * * * * * * * data_row * * * *= doc->createElement(data_row_ch);

* * * * * * * * * * * * sse_attr * * * *= doc->createAttribute(sse_ch);

* * * * * * * * * * * * bin_rep_attr * *= doc->createAttribute(bin_rep_ch);

* * * * * * * * * * * * def_num_attr * *= doc-

createAttribute(def_num_ch);

* * * * * * * * * * * * //set SSE value

* * * * * * * * * * * * char* sse_buffer = new char[128];

* * * * * * * * * * * * sprintf( sse_buffer, "%f",results->SSEs[i] );

* * * * * * * * * * * * //set binary representation value

* * * * * * * * * * * * char* br_buffer = new char[128];

* * * * * * * * * * * * sprintf( br_buffer, "%s", results-

bin_reps[i] );

* * * * * * * * * * * * //set defintion number value

* * * * * * * * * * * * char* dn_buffer = new char[128];

* * * * * * * * * * * * sprintf( dn_buffer, "%s", results-

def_nums[i] );

* * * * * * * * * * * * //trim strings

* * * * * * * * * * * * XMLString::trim(sse_buffer);

* * * * * * * * * * * * XMLString::trim(br_buffer);

* * * * * * * * * * * * XMLString::trim(dn_buffer);

* * * * * * * * * * * * //convert to XMLCh*

* * * * * * * * * * * * XMLCh* sse_val * * =

XMLString::transcode(sse_buffer);

* * * * * * * * * * * * XMLCh* bin_rep_val =

XMLString::transcode(br_buffer);

* * * * * * * * * * * * XMLCh* def_num_val =

XMLString::transcode(dn_buffer);

* * * * * * * * * * * * //set attr values

* * * * * * * * * * * * sse_attr * *->setValue(sse_val);

* * * * * * * * * * * * bin_rep_attr->setValue(bin_rep_val);

* * * * * * * * * * * * def_num_attr->setValue(def_num_val);

* * * * * * * * * * * * //append attribute nodes to data row

* * * * * * * * * * * * data_row->setAttributeNode(sse_attr);

* * * * * * * * * * * * data_row->setAttributeNode(bin_rep_attr);

* * * * * * * * * * * * data_row->setAttributeNode(def_num_attr);

* * * * * * * * * * * * //append data row to root

* * * * * * * * * * * * root->appendChild(data_row);

* * * * * * * * * * * * //free memory

* * * * * * * * * * * * delete[] sse_buffer;

* * * * * * * * * * * * delete[] br_buffer;

* * * * * * * * * * * * delete[] dn_buffer;

* * * * * * * * * * * * XMLString::release(&sse_val);

* * * * * * * * * * * * XMLString::release(&bin_rep_val);

* * * * * * * * * * * * XMLString::release(&def_num_val);

* * * * * * * * * * * * //handle coefficients on aper data row basis

* * * * * * * * * * * * for( unsigned int j=0; j<results->coefficients->size; j++)

* * * * * * * * * * * * {

* * * * * * * * * * * * * * * * //create coefficient element

* * * * * * * * * * * * * * * * coeff = doc->createElement(coeff_ch);

* * * * * * * * * * * * * * * * //create attribute nodes

* * * * * * * * * * * * * * * * index_attr= doc->createAttribute(index_ch);

* * * * * * * * * * * * * * * * value_attr= doc-

createAttribute(value_ch);

* * * * * * * * * * * * * * * * //request some space for conversion

* * * * * * * * * * * * * * * * char* index_buffer = new char[128];

* * * * * * * * * * * * * * * * char* value_buffer = new char[128];

* * * * * * * * * * * * * * * * //convert from numeric to char*

* * * * * * * * * * * * * * * * sprintf( index_buffer, "%i", results->coefficients[i].index[j] );

* * * * * * * * * * * * * * * * sprintf( value_buffer, "%f", results-

coefficients[i].values[j] );

* * * * * * * * * * * * * * * * //remove whitespace

* * * * * * * * * * * * * * * * XMLString::trim(index_buffer);

* * * * * * * * * * * * * * * * XMLString::trim(value_buffer);

* * * * * * * * * * * * * * * * //create values as XMLCh*

* * * * * * * * * * * * * * * * XMLCh* index_val =

XMLString::transcode(index_buffer);

* * * * * * * * * * * * * * * * XMLCh* value_val =

XMLString::transcode(value_buffer);

* * * * * * * * * * * * * * * * //set values

* * * * * * * * * * * * * * * * index_attr->setValue(index_val);

* * * * * * * * * * * * * * * * value_attr->setValue(value_val);

* * * * * * * * * * * * * * * * coeff->setAttributeNode(index_attr);

* * * * * * * * * * * * * * * * coeff->setAttributeNode(value_attr);

* * * * * * * * * * * * * * * * //append coefficient to data row

* * * * * * * * * * * * * * * * data_row->appendChild(coeff);

* * * * * * * * * * * * * * * * //free memory

* * * * * * * * * * * * * * * * delete[] index_buffer;

* * * * * * * * * * * * * * * * delete[] value_buffer;

* * * * * * * * * * * * }//end inner for loop

* * * * * * * * }//end outer for loop

* * * * * * * * //DOM serializer

* * * * * * * * DOMWriter* writer = ((DOMImplementationLS*)impl)-

createDOMWriter();

* * * * * * * * //request some space for URL

* * * * * * * * char* buffer = new char[512];

* * * * * * * * //create URL based on job ID

* * * * * * * * sprintf( buffer, "%sjob_%u_results.xml",

DDAS_RESULT_URL, job_id );

* * * * * * * * //remove whitespace

* * * * * * * * XMLString::trim(buffer);

* * * * * * * * //create URL as XMLCh*

* * * * * * * * XMLCh* url_ch = XMLString::transcode(buffer);

* * * * * * * * //set output type

* * * * * * * * LocalFileFormatTarget local_file( url_ch );

* * * * * * * * //set some formatting options

* * * * * * * * if (writer->canSetFeature(XMLUni::fgDOMWRTDiscardDefaultContent, true))

* * * * * * * * * * * * writer->setFeature(XMLUni::fgDOMWRTDiscardDefaultContent, true);

* * * * * * * * if (writer->canSetFeature(XMLUni::fgDOMWRTFormatPrettyPrint, true))

* * * * * * * * * * * * writer-

setFeature(XMLUni::fgDOMWRTFormatPrettyPrint, true);

* * * * * * * * //actually write the root node to file

* * * * * * * * writer->writeNode(&local_file, *root);

* * * * * * * * //free resources

* * * * * * * * writer *->release();

* * * * * * * * doc * * ->release();

* * * * * * * * delete[] buffer;

* * * * * * * * return 1;

* * * * * * * * }

* * * * * * * * catch( XMLException& e)

* * * * * * * * {

* * * * * * * * * * * * char* message =

XMLString::transcode( e.getMessage() );

* * * * * * * * * * * * cerr << "The following error occurred during

the DOM creation: " << message << endl;

* * * * * * * * * * * * XMLString::release( &message );

* * * * * * * * }

* * * * }

Here are the structs used:

Expand|Select|Wrap|Line Numbers

 
struct REGRESSION_COEFFICIENTS

{

* * * * //which column are talking about

* * * * int* * * * * * *index;

* * * * //the value of the linear coefficient

* * * * double* * * * * values;

* * * * //the size of the struct

* * * * unsigned int * *size;

};

///A struct used to hold the client result data

struct DDAS_CLIENT_RESULT_DATA

{

* * * * /// The binary representation of the definition number -

serves to disambiguate endianess

* * * * char** * * * * *bin_reps;

* * * * /// The decimal representation of the combination of

independent variables used in this regression (1011 base 2 == 11 base

10)

* * * * char** * * * * *def_nums;

* * * * /// The sum of squared error for the linear regression

* * * * double* * * * * SSEs;

* * * * /// How many results are contained in the struct

* * * * unsigned int * size;

* * * * //regression coefficients

* * * * REGRESSION_COEFFICIENTS* coefficients;

};

And here is a sample of the output:

[OUTPUT]

* <data_row SSE="137.527403 " binary_represen tation="1010111 011111001"
definition_numb er="44793">
* * <coefficient index="0" value="-0.000977"/>
* * <coefficient index="1" value="0.000000 "/>
* * <coefficient index="2" value="0.000000 "/>
* * <coefficient index="3" value="-66123751426.362 999"/>
* * <coefficient index="4" value="0.000088 "/>
* * <coefficient index="5" value="10958014 73.097510"/>
* * <coefficient index="6" value="0.003840 "/>
* * <coefficient index="7" value="-26494374893.985 001"/>
* * <coefficient index="8" value="0.000000 "/>
* * <coefficient index="9" value="0.097907 "/>
* * <coefficient index="10" value="0.004219 "/>
* * <coefficient index="11" value="66123751 426.363098"/>
* * <coefficient index="12" value="0.000000 "/>
* * <coefficient index="13" value="-1095801473.1025 00"/>
* * <coefficient index="14" value="0.000000 "/>
* * <coefficient index="15" value="26494374 894.009701"/>
* </data_row>

* <data_row SSE="137.533380 " binary_represen tation=""
definition_numb er="">
* * <coefficient index="0" value="-0.001039"/>
* * <coefficient index="1" value="0.097757 "/>
* * <coefficient index="2" value="75825857 3.171398"/>
* * <coefficient index="3" value="-35123845436.044 098"/>
* * <coefficient index="4" value="0.000000 "/>
* * <coefficient index="5" value="0.000000 "/>
* * <coefficient index="6" value="-464164413.89040 3"/>
* * <coefficient index="7" value="0.024555 "/>
* * <coefficient index="8" value="0.000000 "/>
* * <coefficient index="9" value="0.000000 "/>
* * <coefficient index="10" value="-758258573.16723 3"/>
* * <coefficient index="11" value="35123845 436.044197"/>
* * <coefficient index="12" value="0.000016 "/>
* * <coefficient index="13" value="-0.004898"/>
* * <coefficient index="14" value="46416441 3.894253"/>
* * <coefficient index="15" value="0.000000 "/>
* </data_row>

* <data_row SSE="137.533796 " binary_represen tation="0111111 011P>V"
definition_numb er="32457">
* * <coefficient index="0" value="-0.001034"/>
* * <coefficient index="1" value="0.000000 "/>
* * <coefficient index="2" value="0.000000 "/>
* * <coefficient index="3" value="-35209041045.623 802"/>
* * <coefficient index="4" value="0.000000 "/>
* * <coefficient index="5" value="0.000000 "/>
* * <coefficient index="6" value="-425970878.52097 1"/>
* * <coefficient index="7" value="0.024583 "/>
* * <coefficient index="8" value="0.000000 "/>
* * <coefficient index="9" value="0.097997 "/>
* * <coefficient index="10" value="0.004175 "/>
* * <coefficient index="11" value="35209041 045.623802"/>
* * <coefficient index="12" value="-0.000016"/>
* * <coefficient index="13" value="-0.004899"/>
* * <coefficient index="14" value="42597087 8.524831"/>
* * <coefficient index="15" value="0.000000 "/>
* </data_row>

[/OUTPUT]

Some of the output is correct, some is there but erroneous, some is
missing altogether. Each data_row element should have a
definition_numb er with some value between 0 and (2^16)-1. The binary
representation is merely the binary representation of the decimal
value. I have spent many hours trying to figure out what the error
is. *Again, I am able to print the struct (printDCRD) at the beginning
of the method and verify that the data contained therein is correct
and present.

So, if anyone can lend me some attention cycles, I'd greatly
appreciate it.

Thanks ahead. Anyone?

Jun 27 '08 #2

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