org.archive.wayback.replay.charset

Class BaseEncodingSniffer

java.lang.Object

org.archive.wayback.replay.charset.BaseEncodingSniffer

All Implemented Interfaces:

EncodingSniffer

Direct Known Subclasses:

ByteOrderMarkSniffer, ContentTypeHeaderSniffer, PrescanMetadataSniffer, UniversalChardetSniffer

public abstract class BaseEncodingSniffer
extends Object
implements EncodingSniffer

Implements common utility methods for EncodingSniffer.

Field Summary

Fields

Modifier and Type	Field and Description
protected static String	CHARSET_TOKEN
protected static String	HTTP_CONTENT_TYPE_HEADER

Constructor Summary

Constructors

Constructor and Description
BaseEncodingSniffer()

Method Summary

Methods

Modifier and Type	Method and Description
protected String	contentTypeToCharset(String contentType) return character encoding from content-type, if specified and valid.
protected boolean	isCharsetSupported(String charsetName) test if charsetName is supported by Java.
protected String	mapCharset(String orig)
abstract String	sniff(Resource resource)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CHARSET_TOKEN

protected static final String CHARSET_TOKEN

See Also:

Constant Field Values

HTTP_CONTENT_TYPE_HEADER

protected static final String HTTP_CONTENT_TYPE_HEADER

See Also:

Constant Field Values

Constructor Detail

BaseEncodingSniffer

public BaseEncodingSniffer()

Method Detail

sniff

public abstract String sniff(Resource resource)

Specified by:

sniff in interface EncodingSniffer

isCharsetSupported

protected boolean isCharsetSupported(String charsetName)

test if charsetName is supported by Java.

Parameters:

charsetName - character encoding name

Returns:

true if supported.

contentTypeToCharset

protected String contentTypeToCharset(String contentType)

return character encoding from content-type, if specified and valid.

some encoding names are replaced. see mapCharset(String)

Parameters:

contentType - content-type text, ex. "text/html; charset=shift_jis"

Returns:

character encoding, ex. "shift_jis", or null character encoding is unspecified, or invalid.

mapCharset

protected String mapCharset(String orig)