Package io.micronaut.context.env

Interface PropertyPlaceholderResolver

All Known Subinterfaces:
ApplicationContext
All Known Implementing Classes:
DefaultApplicationContext, DefaultPropertyPlaceholderResolver
public interface PropertyPlaceholderResolver
Interface for implementations that resolve placeholders in configuration and annotations.
Since:
1.0
Author:
Graeme Rocher

  • Method Details

    • resolvePlaceholders

      Optional<String> resolvePlaceholders(String str)
      Resolve the placeholders and return an Optional String if it was possible to resolve them.
      Parameters:
      str - The placeholder to resolve
      Returns:
      The optional string or Optional.empty() if resolution was not possible

    • getPrefix

      @NonNull default @NonNull String getPrefix()
      Returns:
      The prefix used

    • resolveRequiredPlaceholders

      @NonNull default @NonNull String resolveRequiredPlaceholders(String str) throws ConfigurationException
      Resolve the placeholders and return a string if it was possible to resolve them.
      Parameters:
      str - The placeholder to resolve
      Returns:
      The resolved string
      Throws:
      ConfigurationException - If the placeholders could not be resolved

    • resolveRequiredPlaceholdersObject

      @NonNull default @NonNull Object resolveRequiredPlaceholdersObject(String str) throws ConfigurationException
      Resolve the placeholders in the given string. This behaves like resolveRequiredPlaceholders(String), except that when the whole input is a placeholder, the value is not converted to String but returned as-is.
      Parameters:
      str - The placeholder to resolve
      Returns:
      The resolved object or string
      Throws:
      ConfigurationException - If the placeholders could not be resolved

    • resolveRequiredPlaceholder

      @NonNull default <T> T resolveRequiredPlaceholder(String str, Class<T> type) throws ConfigurationException
      Resolves the value of a single placeholder.
      Type Parameters:
      T - The type the value should be converted to
      Parameters:
      str - The string containing the placeholder
      type - The class of the type
      Returns:
      The resolved value
      Throws:
      ConfigurationException - If multiple placeholders are found or if the placeholder could not be converted to the requested type

    • resolveOptionalPlaceholder

      default <T> Optional<T> resolveOptionalPlaceholder(String str, Class<T> type) throws ConfigurationException
      Resolves the optional value of a single placeholder.
      Type Parameters:
      T - The type the value should be converted to
      Parameters:
      str - The string containing the placeholder
      type - The class of the type
      Returns:
      The resolved optional value
      Throws:
      ConfigurationException
      Since:
      4.2.0