org.springframework.beans.factory.xml

## Class SimpleConstructorNamespaceHandler

- java.lang.Object
- - org.springframework.beans.factory.xml.SimpleConstructorNamespaceHandler

- All Implemented Interfaces:
    NamespaceHandler

      public class SimpleConstructorNamespaceHandler
      extends Object
      implements NamespaceHandler

  Simple `NamespaceHandler` implementation that maps custom attributes directly through to bean properties. An important point to note is that this `NamespaceHandler` does not have a corresponding schema since there is no way to know in advance all possible attribute names.

  An example of the usage of this `NamespaceHandler` is shown below:

       <bean id="author" class="..TestBean" c:name="Enescu" c:work-ref="compositions"/>

  Here the '`c:name`' corresponds directly to the '`name` ' argument declared on the constructor of class '`TestBean`'. The '`c:work-ref`' attributes corresponds to the '`work`' argument and, rather than being the concrete value, it contains the name of the bean that will be considered as a parameter. Note: This implementation supports only named parameters - there is no support for indexes or types. Further more, the names are used as hints by the container which, by default, does type introspection.
  Author:
    Costin Leau
  See Also:
    `SimplePropertyNamespaceHandler`

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `SimpleConstructorNamespaceHandler()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `BeanDefinitionHolder` | `decorate(Node node, BeanDefinitionHolder definition, ParserContext parserContext)` Parse the specified `Node` and decorate the supplied `BeanDefinitionHolder`, returning the decorated definition.
    `void` | `init()` Invoked by the `DefaultBeanDefinitionDocumentReader` after construction but before any custom elements are parsed.
    `BeanDefinition` | `parse(Element element, ParserContext parserContext)` Parse the specified `Element` and register any resulting `BeanDefinitions` with the `BeanDefinitionRegistry` that is embedded in the supplied `ParserContext`.

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

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

- - ### Constructor Detail

    - #### SimpleConstructorNamespaceHandler

          public SimpleConstructorNamespaceHandler()

  - ### Method Detail

    - #### init

          public void init()

      Description copied from interface: `NamespaceHandler`
      Invoked by the `DefaultBeanDefinitionDocumentReader` after construction but before any custom elements are parsed.
      Specified by:
        `init` in interface `NamespaceHandler`
      See Also:
        `NamespaceHandlerSupport.registerBeanDefinitionParser(String, BeanDefinitionParser)`

    - #### parse

          public BeanDefinition parse(Element element,
                             ParserContext parserContext)

      Description copied from interface: `NamespaceHandler`
      Parse the specified `Element` and register any resulting `BeanDefinitions` with the `BeanDefinitionRegistry` that is embedded in the supplied `ParserContext`.

      Implementations should return the primary `BeanDefinition` that results from the parse phase if they wish to be used nested inside (for example) a `&lt;property&gt;` tag.

      Implementations may return `null` if they will not be used in a nested scenario.

      Specified by:
        `parse` in interface `NamespaceHandler`
      Parameters:
        `element` - the element that is to be parsed into one or more `BeanDefinitions`
        `parserContext` - the object encapsulating the current state of the parsing process
      Returns:
        the primary `BeanDefinition` (can be `null` as explained above)

    - #### decorate

          public BeanDefinitionHolder decorate(Node node,
                                      BeanDefinitionHolder definition,
                                      ParserContext parserContext)

      Description copied from interface: `NamespaceHandler`
      Parse the specified `Node` and decorate the supplied `BeanDefinitionHolder`, returning the decorated definition.

      The `Node` may be either an `Attr` or an `Element`, depending on whether a custom attribute or element is being parsed.

      Implementations may choose to return a completely new definition, which will replace the original definition in the resulting `BeanFactory`.

      The supplied `ParserContext` can be used to register any additional beans needed to support the main definition.

      Specified by:
        `decorate` in interface `NamespaceHandler`
      Parameters:
        `node` - the source element or attribute that is to be parsed
        `definition` - the current bean definition
        `parserContext` - the object encapsulating the current state of the parsing process
      Returns:
        the decorated definition (to be registered in the BeanFactory), or simply the original bean definition if no decoration is required. A `null` value is strictly speaking invalid, but will be leniently treated like the case where the original bean definition gets returned.