Question

Hy,

I’m expiriencing logical troubles at reading a file, line for line. I know you can do this with BufferedReader, but sometimes I have “values” which are written in more lines, which would be important.

Sample of the file im reading:

   <#FIELD NAME = DESC> Some text that goes

        over multiple lines

        which is needed</#FIELD>

    <#FIELD NAME = TEMP> some values are just a single line</#FIELD>

I need to parse the Field Name, which would be TEMP or DESC like above, and then extract the value between those brackets <#FIELD NAME =DESC>important values </#FIELD>. But I’m not really sure how to “recognize” that an entry has a multiple line value or a single value line and then save it to a variable, when using BufferedReader.

I would really appreciate any hint or example to direct me into the right direction !

Because reading it line for line, did not help me progress… I will not post the whole code as I think there is a more easier way to read it and you will get an idea of what I’ve done so far by this little snippet.

if (line.contains("<#FIELD NAME = AUTOR>"))
{
    String autor = line.substring(line.indexOf(">") + 1, line.indexOf("</#"));
    metaData.setAutor(autor.trim());
}
else if (line.contains("<#FIELD NAME = DOKUMENTNR>"))
{
    String dokumentnr = line.substring(line.indexOf(">") + 1, line.indexOf("</#"));
    metaData.setDoukumentnr(dokumentnr.trim());
    ...

Answer 1

try something like

public string ReadField(BufferedReader reader) 
{
    string line = reader.readLine();
    while (line.indexOf("</#FIELD>") == -1)
    {
        line += reader.readLine(); // This does not preserve line breaks
    }

    return line;
}

In the original code, something like

string line = ReadField(myReader); // This reads up to the next field

if(line.contains("<#FIELD NAME = AUTOR>")){
   String autor = line.substring(line.indexOf(">")+1,line.indexOf("</#"));
   metaData.setAutor(autor.trim());
} else if(line.contains("<#FIELD NAME = DOKUMENTNR>")) {
   String dokumentnr = line.substring(line.indexOf(">")+1,line.indexOf("</#"));
   metaData.setDoukumentnr(dokumentnr.trim());
}