Package org.apache.tika.parser.html
Class HtmlEncodingDetector
- java.lang.Object
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- org.apache.tika.parser.html.HtmlEncodingDetector
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- All Implemented Interfaces:
Serializable
,EncodingDetector
public class HtmlEncodingDetector extends Object implements EncodingDetector
Character encoding detector for determining the character encoding of a HTML document based on the potential charset parameter found in a Content-Type http-equiv meta tag somewhere near the beginning. Especially useful for determining the type among multiple closely related encodings (ISO-8859-*) for which other types of encoding detection are unreliable.- Since:
- Apache Tika 1.2
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description HtmlEncodingDetector()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Charset
detect(InputStream input, Metadata metadata)
Detects the character encoding of the given text document, ornull
if the encoding of the document can not be detected.int
getMarkLimit()
void
setMarkLimit(int markLimit)
How far into the stream to read for charset detection.
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Method Detail
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detect
public Charset detect(InputStream input, Metadata metadata) throws IOException
Description copied from interface:EncodingDetector
Detects the character encoding of the given text document, ornull
if the encoding of the document can not be detected.If the document input stream is not available, then the first argument may be
null
. Otherwise the detector may read bytes from the start of the stream to help in encoding detection. The given stream is guaranteed to support themark feature
and the detector is expected tomark
the stream before reading any bytes from it, and toreset
the stream before returning. The stream must not be closed by the detector.The given input metadata is only read, not modified, by the detector.
- Specified by:
detect
in interfaceEncodingDetector
- Parameters:
input
- text document input stream, ornull
metadata
- input metadata for the document- Returns:
- detected character encoding, or
null
- Throws:
IOException
- if the document input stream could not be read
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getMarkLimit
public int getMarkLimit()
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setMarkLimit
@Field public void setMarkLimit(int markLimit)
How far into the stream to read for charset detection. Default is 8192.- Parameters:
markLimit
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