examples/NameParse.cpp File Reference

example: parse good and bad element names More...

Include dependency graph for NameParse.cpp:

Functions
void	tryParse (ImageFile imf, ustring pathName)
	Try various parsing functions on an element name.
int	main (int, char **)
	Example use of element name parsing functions.

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Detailed Description

example: parse good and bad element names

Also see listing at end of this page for source without line numbers (to cut&paste from).

/*** NameParse.cpp example: parse good and bad element names */
#include <iostream>
#include "E57Foundation.h"
using namespace e57;
using namespace std;

void tryParse(ImageFile imf, ustring pathName) {
    cout << "pathName=" << pathName << endl;

    try {
        ustring prefix, localPart;
        imf.elementNameParse(pathName, prefix, localPart);
        cout << "  prefix=\"" << prefix << "\" localPart=\"" << localPart << "\"" << endl;
    } catch(E57Exception& ex) {
        if (ex.errorCode() == E57_ERROR_BAD_PATH_NAME)
            cout << "  Is not legal element name" << endl;
    }

    if (imf.isElementNameExtended(pathName))
        cout << "  Is extended element name" << endl;
    else
        cout << "  Is not extended element name" << endl;
}

int main(int /*argc*/, char** /*argv*/) {
    try {
        ImageFile imf("temp._e57", "w");

        tryParse(imf, "bar");
        tryParse(imf, "foo:bar");

        imf.close(); // don't forget to explicitly close the ImageFile
    } catch(E57Exception& ex) {
        ex.report(__FILE__, __LINE__, __FUNCTION__);
        return(-1);
    }
    return(0);
}

This example program illustrates the element parsing functions of ImageFile. See the HelloWorld.cpp example for discussion of the use of include files, constructing an ImageFile, and the try/catch block to handle exceptions.

A write-mode ImageFile is created in source line 31. A test function is called with two example element names in source lines 33-34. The parsing functions don't actually check to see if there are objects defined with the given path names or element names, they just test whether they are syntactically correct. The ImageFile::isElementNameExtended functions only checks to see if a prefix is used, and not if it is declared in the ImageFile.

The output lines 2-3 show that "bar" can be parsed and it is not extended. The output lines 5-6 show that "foo:bar" can be parsed and it is extended.

The following console output is produced:

The XML section of the temp._e57 E57 file produced by this example program is as follows:

Here is the source code without line numbers to cut&paste from:

/*** NameParse.cpp example: parse good and bad element names */
#include <iostream>
#include "E57Foundation.h"
using namespace e57;
using namespace std;

void tryParse(ImageFile imf, ustring pathName) {
    cout << "pathName=" << pathName << endl;

    try {
        ustring prefix, localPart;
        imf.elementNameParse(pathName, prefix, localPart);
        cout << "  prefix=\"" << prefix << "\" localPart=\"" << localPart << "\"" << endl;
    } catch(E57Exception& ex) {
        if (ex.errorCode() == E57_ERROR_BAD_PATH_NAME)
            cout << "  Is not legal element name" << endl;
    }

    if (imf.isElementNameExtended(pathName))
        cout << "  Is extended element name" << endl;
    else
        cout << "  Is not extended element name" << endl;
}

int main(int /*argc*/, char** /*argv*/) {
    try {
        ImageFile imf("temp._e57", "w");

        tryParse(imf, "bar");
        tryParse(imf, "foo:bar");

        imf.close(); // don't forget to explicitly close the ImageFile
    } catch(E57Exception& ex) {
        ex.report(__FILE__, __LINE__, __FUNCTION__);
        return(-1);
    }
    return(0);
}