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 java.lang.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 from(java.io.Reader) and fromWildcards(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
java.util.List<java.util.Map.Entry<java.util.function.Predicate<Config.Key>,java.lang.String>>	data() Returns the predicate/replacement value pairs.
static OverrideSource.OverrideData	empty() Creates an OverrideData object containing no overrides.
static OverrideSource.OverrideData	from(java.util.List<java.util.Map.Entry<java.util.function.Predicate<Config.Key>,java.lang.String>> data) Creates OverrideData from a List of predicate/replacement pairs.
static OverrideSource.OverrideData	from(java.io.Reader reader) Creates OverrideData from a Reader.
static OverrideSource.OverrideData	fromWildcards(java.util.List<java.util.Map.Entry<java.lang.String,java.lang.String>> wildcards) Creates OverrideData from a List of String pairs.

Methods inherited from class java.lang.Object

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

Method Detail

from

public static OverrideSource.OverrideData from(java.util.List<java.util.Map.Entry<java.util.function.Predicate<Config.Key>,java.lang.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

fromWildcards

public static OverrideSource.OverrideData fromWildcards(java.util.List<java.util.Map.Entry<java.lang.String,java.lang.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

from

public static OverrideSource.OverrideData from(java.io.Reader reader)
                                        throws java.io.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:

java.io.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 java.util.List<java.util.Map.Entry<java.util.function.Predicate<Config.Key>,java.lang.String>> data()

Returns the predicate/replacement value pairs.

Returns:

a list of pairs of predicate and replacement value