[jdom-interest] XML escaping and unescaping

[John Caron]

I'm unsure if I have a basic misunderstanding, but its easy enough to 
create a String in Java like

    char[] cdata = new char[] { (char) 1 };
    String s = new String( cdata);

     Element.setText(s);

or

    Element.setText( XMLOutputter.escapeElementEntities(s))

that gets an exception like:

      The data "
" is not legal for a JDOM character content: 0x1 is not 
a legal XML character

I guess that means that the String has an illegal Unicode encoding  or 
something ? Or maybe I dont know how to extract the Unicode 
representation of the String ?
 

Jason Hunter wrote:

> XMLOutputter has escapeElementEntities() and escapeAttributeEntities() 
> that do what you want and have a pluggaable EscapeStrategy to handle 
> characters outside the selected output encoding.  We don't have code 
> to do the reverse as we rely on XML parsers for that.
>
> -jh-
>
> d.wall at computer.org wrote:
>
>> Does JDOM come with any utility routines that will take a String and 
>> make it XML safe?  And also a routine that takes an XML safe encoding 
>> and converts it back to a regular String?
>>
>> i.e.
>>
>> String -> XML Safe string -> String
>>
>> "This" -> "This"  -> "This"  (no change needed)
>> "4+3<4+4" -> "4+3&lt;4+4" -> "4+3<4+4"
>>
>> I only ask because I have some basic routines that do this, but they 
>> only map the following:
>>
>>  >   &gt;
>> <   &lt;
>> &   &amp;
>> '     &apos;
>> "    &quot;
>>
>> It currently doesn't deal with escaped character codes like &#039; It 
>> seems that putting data into XML and getting it back from XML is so 
>> common that there must be a general routine to do this rather than 
>> having to rely on my own implementation.
>>
>> Thanks,
>> David
>>
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