Package org.apache.sis.internal.storage.wkt

Class StoreProvider.Peek

java.lang.Object

org.apache.sis.internal.storage.wkt.FirstKeywordPeek

org.apache.sis.internal.storage.wkt.StoreProvider.Peek

Enclosing class:

StoreProvider

static final class StoreProvider.Peek
extends FirstKeywordPeek

The object to use for verifying if the first keyword is a WKT one. This object contains the set of recognized WKT keywords.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final StoreProvider.Peek	INSTANCE	The unique instance.
private final Set<String>	keywords	The set of WKT keywords.
(package private) static final int	MIN_LENGTH	Length of the shortest keyword.

Fields inherited from class org.apache.sis.internal.storage.wkt.FirstKeywordPeek

ACCEPT, COMMENT, IGNORE, maxLength, READ_AHEAD_LIMIT, REJECT

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Peek()	Creates the unique instance.

Method Summary

Modifier and Type	Method	Description
protected ProbeResult	forKeyword(char[] keyword, int length)	Returns the value to be returned by StoreProvider.probeContent(StorageConnector) for the given WKT keyword.
protected boolean	isPostKeyword(int c)	Returns true if the given first non-white character after the keyword is one of the expected characters.
(package private) final Set<String>	keywords()	Returns the keywords for test purpose.

Methods inherited from class org.apache.sis.internal.storage.wkt.FirstKeywordPeek

getAuxiliaryPath, isKeywordChar, probeContent, probeContent

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

static final StoreProvider.Peek INSTANCE

The unique instance.

MIN_LENGTH

static final int MIN_LENGTH

Length of the shortest keyword.

See Also:

• Constant Field Values

keywords

private final Set<String> keywords

The set of WKT keywords.

Constructor Details

Peek

private Peek()

Creates the unique instance.

Method Details

keywords

final Set<String> keywords()

Returns the keywords for test purpose.

isPostKeyword

protected boolean isPostKeyword(int c)

Returns true if the given first non-white character after the keyword is one of the expected characters.

Specified by:

isPostKeyword in class FirstKeywordPeek

Parameters:

c - the first non-white character after the keyword, or -1 if we reached the end of stream.

Returns:

true if the given character is one of the expected post-keyword characters.

forKeyword

protected ProbeResult forKeyword(char[] keyword,
 int length)

Returns the value to be returned by StoreProvider.probeContent(StorageConnector) for the given WKT keyword. This method changes the case to match the one used in the keywords map, then verify if the keyword that we found is one of the known WKT keywords. Keywords with the "CRS" suffix are WKT 2 while keywords with the "CS" suffix are WKT 1.

Specified by:

forKeyword in class FirstKeywordPeek

Parameters:

keyword - the first keyword found in the input. May be null if length is zero.

length - number of valid characters in keyword.

Returns:

ProbeResult.SUPPORTED if the given storage seems to be readable.