org.springframework.core.env

## Class PropertySourcesPropertyResolver

- java.lang.Object
- - org.springframework.core.env.AbstractPropertyResolver
  - - org.springframework.core.env.PropertySourcesPropertyResolver

- All Implemented Interfaces:
    ConfigurablePropertyResolver, PropertyResolver

      public class PropertySourcesPropertyResolver
      extends AbstractPropertyResolver

  `PropertyResolver` implementation that resolves property values against an underlying set of `PropertySources`.
  Since:
    3.1
  Author:
    Chris Beams
  See Also:
    `PropertySource`, `PropertySources`, `AbstractEnvironment`

- - ### Field Summary

    - ### Fields inherited from class org.springframework.core.env.AbstractPropertyResolver

      `conversionService, logger`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `PropertySourcesPropertyResolver(PropertySources propertySources)` Create a new resolver against the given property sources.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `containsProperty(String key)` Return whether the given property key is available for resolution, i.e., the value for the given key is not `null`.
    `String` | `getProperty(String key)` Return the property value associated with the given key, or `null` if the key cannot be resolved.
    `<T> T` | `getProperty(String key, Class<T> targetValueType)` Return the property value associated with the given key, or `null` if the key cannot be resolved.
    `<T> Class<T>` | `getPropertyAsClass(String key, Class<T> targetValueType)` Convert the property value associated with the given key to a `Class` of type `T` or `null` if the key cannot be resolved.

    - ### Methods inherited from class org.springframework.core.env.AbstractPropertyResolver

      `getConversionService, getProperty, getProperty, getRequiredProperty, getRequiredProperty, resolveNestedPlaceholders, resolvePlaceholders, resolveRequiredPlaceholders, setConversionService, setIgnoreUnresolvableNestedPlaceholders, setPlaceholderPrefix, setPlaceholderSuffix, setRequiredProperties, setValueSeparator, validateRequiredProperties`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### PropertySourcesPropertyResolver

          public PropertySourcesPropertyResolver(PropertySources propertySources)

      Create a new resolver against the given property sources.
      Parameters:
        `propertySources` - the set of `PropertySource` objects to use

  - ### Method Detail

    - #### containsProperty

          public boolean containsProperty(String key)

      Description copied from interface: `PropertyResolver`
      Return whether the given property key is available for resolution, i.e., the value for the given key is not `null`.

    - #### getProperty

          public String getProperty(String key)

      Description copied from interface: `PropertyResolver`
      Return the property value associated with the given key, or `null` if the key cannot be resolved.
      Parameters:
        `key` - the property name to resolve
      See Also:
        `PropertyResolver.getProperty(String, String)`, `PropertyResolver.getProperty(String, Class)`, `PropertyResolver.getRequiredProperty(String)`

    - #### getProperty

          public <T> T getProperty(String key,
                          Class<T> targetValueType)

      Description copied from interface: `PropertyResolver`
      Return the property value associated with the given key, or `null` if the key cannot be resolved.
      Parameters:
        `key` - the property name to resolve
        `targetValueType` - the expected type of the property value
      See Also:
        `PropertyResolver.getRequiredProperty(String, Class)`

    - #### getPropertyAsClass

          public <T> Class<T> getPropertyAsClass(String key,
                                        Class<T> targetValueType)

      Description copied from interface: `PropertyResolver`
      Convert the property value associated with the given key to a `Class` of type `T` or `null` if the key cannot be resolved.
      See Also:
        `PropertyResolver.getProperty(String, Class)`