程序包 org.apache.skywalking.apm.util

Enum Class PropertyPlaceholderHelper

java.lang.Object

java.lang.Enum<PropertyPlaceholderHelper>

org.apache.skywalking.apm.util.PropertyPlaceholderHelper

所有已实现的接口:

Serializable, Comparable<PropertyPlaceholderHelper>, Constable

public enum PropertyPlaceholderHelper
extends Enum<PropertyPlaceholderHelper>

Utility class for working with Strings that have placeholder values in them. A placeholder takes the form ${name}. Using PropertyPlaceholderHelper these placeholders can be substituted for user-supplied values.

Values for substitution can be supplied using a Properties instance or using a PropertyPlaceholderHelper.PlaceholderResolver.

嵌套类概要

嵌套类

修饰符和类型	类	说明
static interface	PropertyPlaceholderHelper.PlaceholderResolver	Strategy interface used to resolve replacement values for placeholders contained in Strings.

从类继承的嵌套类/接口 java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

枚举常量概要

枚举常量

枚举常量	说明
INSTANCE

方法概要

修饰符和类型	方法	说明
protected String	parseStringValue(String value, PropertyPlaceholderHelper.PlaceholderResolver placeholderResolver, Set<String> visitedPlaceholders)
String	replacePlaceholders(String value, Properties properties)	Replaces all placeholders of format ${name} with the corresponding property from the supplied Properties.
String	replacePlaceholders(String value, PropertyPlaceholderHelper.PlaceholderResolver placeholderResolver)	Replaces all placeholders of format ${name} with the value returned from the supplied PropertyPlaceholderHelper.PlaceholderResolver.
static PropertyPlaceholderHelper	valueOf(String name)	Returns the enum constant of this class with the specified name.
static PropertyPlaceholderHelper[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

从类继承的方法 java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

INSTANCE

public static final PropertyPlaceholderHelper INSTANCE

方法详细资料

values

public static PropertyPlaceholderHelper[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

返回:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static PropertyPlaceholderHelper valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - 如果参数为空值

replacePlaceholders

public String replacePlaceholders(String value,
 Properties properties)

Replaces all placeholders of format ${name} with the corresponding property from the supplied Properties.

参数:

value - the value containing the placeholders to be replaced

properties - the Properties to use for replacement

返回:

the supplied value with placeholders replaced inline

replacePlaceholders

public String replacePlaceholders(String value,
 PropertyPlaceholderHelper.PlaceholderResolver placeholderResolver)

Replaces all placeholders of format ${name} with the value returned from the supplied PropertyPlaceholderHelper.PlaceholderResolver.

参数:

value - the value containing the placeholders to be replaced

placeholderResolver - the PlaceholderResolver to use for replacement

返回:

the supplied value with placeholders replaced inline

parseStringValue

protected String parseStringValue(String value,
 PropertyPlaceholderHelper.PlaceholderResolver placeholderResolver,
 Set<String> visitedPlaceholders)