Package io.helidon.config.spi

Class OverrideSource.OverrideData

java.lang.Object

io.helidon.config.spi.OverrideSource.OverrideData

Enclosing interface:

OverrideSource

public static final class OverrideSource.OverrideData
extends Object

Group of config override settings.

OverrideData supports the * wildcard character which represents one or more regex word characters: [a-zA-Z_0-9]. In particular the create(java.io.Reader) and createFromWildcards(java.util.List<java.util.Map.Entry<java.lang.String, java.lang.String>>) static factory methods deal with pairs of Strings; the first is a possible wildcard expression, and the second is the replacement value the config system will use as it loads any Config value node with a key that matches the wildcard expression.

Method Summary

Modifier and Type	Method and Description
static OverrideSource.OverrideData	create(List<Map.Entry<Predicate<Config.Key>,String>> data) Creates OverrideData from a List of predicate/replacement pairs.
static OverrideSource.OverrideData	create(Reader reader) Creates OverrideData from a Reader.
static OverrideSource.OverrideData	createFromWildcards(List<Map.Entry<String,String>> wildcards) Creates OverrideData from a List of String pairs.
List<Map.Entry<Predicate<Config.Key>,String>>	data() Returns the predicate/replacement value pairs.
static OverrideSource.OverrideData	empty() Creates an OverrideData object containing no overrides.

Methods inherited from class java.lang.Object

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

Method Detail

create

public static OverrideSource.OverrideData create(List<Map.Entry<Predicate<Config.Key>,String>> data)

Creates OverrideData from a List of predicate/replacement pairs. This method does not use wildcarding.

Parameters:

data - the predicate/replacement pairs

Returns:

OverrideData containing the specified pairs

createFromWildcards

public static OverrideSource.OverrideData createFromWildcards(List<Map.Entry<String,String>> wildcards)

Creates OverrideData from a List of String pairs.

Parameters:

wildcards - List of pairs of wildcard expressions and corresponding replacement values

Returns:

OverrideData object containing the Predicate/String pairs corresponding to the wildcard/replacement pairs

create

public static OverrideSource.OverrideData create(Reader reader)
                                          throws IOException

Creates OverrideData from a Reader. The Reader should provide lines in Java Properties file format. In each line the String to the left of the = sign is either a Config.Key or a wildcard expressions as described above. The String to the right of the = sign is the replacement value.

Parameters:

reader - a source

Returns:

a new instance

Throws:

IOException - when an error occurred when reading from the reader

empty

public static OverrideSource.OverrideData empty()

Creates an OverrideData object containing no overrides.

Returns:

an empty object

data

public List<Map.Entry<Predicate<Config.Key>,String>> data()

Returns the predicate/replacement value pairs.

Returns:

a list of pairs of predicate and replacement value