Lazy XHTML prefix generation
----------------------------
Key: TIKA-131
URL: https://issues.apache.org/jira/browse/TIKA-131
Project: Tika
Issue Type: Improvement
Components: parser
Reporter: Jukka Zitting
Assignee: Jukka Zitting
Priority: Minor
The XHTMLContentHandler utility class is used by many Tika parsers to generate
XHTML output. Among other things, the XHTMLContentHandler automatically
generates the following XHTML skeleton:
<html xmlns="http://www.w3.org/1999/xhtml";>
<head>
<title>...</title>
</head>
<body>
...
</body>
</html>
The <title/> tag (and potentially other metadata in future) is based on the
Metadata.TITLE property of the document being parsed. Unfortunately that
metadata is often not yet available when the XHTML generation is started, as a
typical usage pattern is:
XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata);
xhtml.startDocument();
// parse the document
xhtml.endDocument();
We can avoid the problem in many cases by postponing the XHTML prefix
generation to when the parser actually starts to produce some SAX events.
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