CODEWITHSUNDEEP
javaxmlsax
user278064
user278064

Reputation: 10180

SAX XML Java Entities problem

I've a problem with SAX and Java.

I'm parsing the dblp digital library database xml file (which enumerates journal, conferences, paper). The XML file is very large (> 700MB).

However, my problem is that when the callback characters() returns, if the string retrieved contains several entities, the method only returns the string starting from the last entity characters found.

i.e.: R&uuml;diger Mecke is the original author name held between <author> tags

üdiger Mecke is the result

(The String returned from characters (ch[], start, length) method).

I would like to know:

  1. how to prevent the PArser to automatically resolve entities?
  2. how to solve the truncated characters problem previously described?

Upvotes: 3

Views: 1550

Answers (2)

SanSentinel
SanSentinel

Reputation: 66

characters() is not guaranteed to return of all the characters in a single call. From the Javadoc:

The Parser will call this method to report each chunk of character data. SAX parsers may return all contiguous character data in a single chunk, or they may split it into several chunks.

You need to append the characters returned in all of the calls, something like:

private StringBuffer tempValue = new StringBuffer();

startElement()
{
    tempValue.setLength(0); // clear buffer...
}

characters(characters(char[] ch, int start, int length)
{
    tempValue.append(ch, start, length); // append to buffer
}

endElement()
{
    String value = tempValue.toString(); // use characters in buffer...
}

Upvotes: 4

Don Roby
Don Roby

Reputation: 41135

  1. I don't think you can turn off entity resolution.

  2. The characters method can be called multiple times for a single tag, and you have to collect the characters across the multiple calls rather than expecting them all to arrive at once.

Upvotes: 2

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