org.springframework.ui

## Class ExtendedModelMap

- java.lang.Object
- - java.util.AbstractMap<K,V>
  - - java.util.HashMap<K,V>
    - - java.util.LinkedHashMap<String,Object>
      - - org.springframework.ui.ModelMap
        - - org.springframework.ui.ExtendedModelMap

- All Implemented Interfaces:
    Serializable, Cloneable, Map<String,Object>, Model
  Direct Known Subclasses:
    BindingAwareModelMap

      public class ExtendedModelMap
      extends ModelMap
      implements Model

  Subclass of `ModelMap` that implements the `Model` interface. Java 5 specific like the `Model` interface itself.
  Since:
    2.5.1
  Author:
    Juergen Hoeller
  See Also:
    Serialized Form

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class java.util.AbstractMap

      `AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ExtendedModelMap()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `ExtendedModelMap` | `addAllAttributes(Collection<?> attributeValues)` Copy all attributes in the supplied `Collection` into this `Map`, using attribute name generation for each element.
    `ExtendedModelMap` | `addAllAttributes(Map<String,?> attributes)` Copy all attributes in the supplied `Map` into this `Map`.
    `ExtendedModelMap` | `addAttribute(Object attributeValue)` Add the supplied attribute to this `Map` using a `generated name`.
    `ExtendedModelMap` | `addAttribute(String attributeName, Object attributeValue)` Add the supplied attribute under the supplied name.
    `Map<String,Object>` | `asMap()` Return the current set of model attributes as a Map.
    `ExtendedModelMap` | `mergeAttributes(Map<String,?> attributes)` Copy all attributes in the supplied `Map` into this `Map`, with existing objects of the same name taking precedence (i.e.

    - ### Methods inherited from class org.springframework.ui.ModelMap

      `addAllObjects, addAllObjects, addObject, addObject, containsAttribute`

    - ### Methods inherited from class java.util.LinkedHashMap

      `clear, containsValue, get, removeEldestEntry`

    - ### Methods inherited from class java.util.HashMap

      `clone, containsKey, entrySet, isEmpty, keySet, put, putAll, remove, size, values`

    - ### Methods inherited from class java.util.AbstractMap

      `equals, hashCode, toString`

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

      `finalize, getClass, notify, notifyAll, wait, wait, wait`

    - ### Methods inherited from interface org.springframework.ui.Model

      `containsAttribute`

    - ### Methods inherited from interface java.util.Map

      `containsKey, entrySet, equals, hashCode, isEmpty, keySet, put, putAll, remove, size, values`

- - ### Constructor Detail

    - #### ExtendedModelMap

          public ExtendedModelMap()

  - ### Method Detail

    - #### addAttribute

          public ExtendedModelMap addAttribute(String attributeName,
                                      Object attributeValue)

      Description copied from class: `ModelMap`
      Add the supplied attribute under the supplied name.
      Specified by:
        `addAttribute` in interface `Model`
      Overrides:
        `addAttribute` in class `ModelMap`
      Parameters:
        `attributeName` - the name of the model attribute (never `null`)
        `attributeValue` - the model attribute value (can be `null`)

    - #### addAttribute

          public ExtendedModelMap addAttribute(Object attributeValue)

      Description copied from class: `ModelMap`
      Add the supplied attribute to this `Map` using a `generated name`.

      Note: Empty `Collections` are not added to the model when using this method because we cannot correctly determine the true convention name. View code should check for `null` rather than for empty collections as is already done by JSTL tags.

      Specified by:
        `addAttribute` in interface `Model`
      Overrides:
        `addAttribute` in class `ModelMap`
      Parameters:
        `attributeValue` - the model attribute value (never `null`)

    - #### addAllAttributes

          public ExtendedModelMap addAllAttributes(Collection<?> attributeValues)

      Description copied from class: `ModelMap`
      Copy all attributes in the supplied `Collection` into this `Map`, using attribute name generation for each element.
      Specified by:
        `addAllAttributes` in interface `Model`
      Overrides:
        `addAllAttributes` in class `ModelMap`
      See Also:
        `ModelMap.addAttribute(Object)`

    - #### addAllAttributes

          public ExtendedModelMap addAllAttributes(Map<String,?> attributes)

      Description copied from class: `ModelMap`
      Copy all attributes in the supplied `Map` into this `Map`.
      Specified by:
        `addAllAttributes` in interface `Model`
      Overrides:
        `addAllAttributes` in class `ModelMap`
      See Also:
        `ModelMap.addAttribute(String, Object)`

    - #### mergeAttributes

          public ExtendedModelMap mergeAttributes(Map<String,?> attributes)

      Description copied from class: `ModelMap`
      Copy all attributes in the supplied `Map` into this `Map`, with existing objects of the same name taking precedence (i.e. not getting replaced).
      Specified by:
        `mergeAttributes` in interface `Model`
      Overrides:
        `mergeAttributes` in class `ModelMap`

    - #### asMap

          public Map<String,Object> asMap()

      Description copied from interface: `Model`
      Return the current set of model attributes as a Map.
      Specified by:
        `asMap` in interface `Model`