org.springframework.beans.factory.config

## Class ConstructorArgumentValues

- java.lang.Object
- - org.springframework.beans.factory.config.ConstructorArgumentValues

-     public class ConstructorArgumentValues
      extends Object

  Holder for constructor argument values, typically as part of a bean definition.

  Supports values for a specific index in the constructor argument list as well as for generic argument matches by type.

  Since:
    09.11.2003
  Author:
    Juergen Hoeller
  See Also:
    `BeanDefinition.getConstructorArgumentValues()`

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `ConstructorArgumentValues.ValueHolder` Holder for a constructor argument value, with an optional type attribute indicating the target type of the actual constructor argument.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ConstructorArgumentValues()` Create a new empty ConstructorArgumentValues object.
    `ConstructorArgumentValues(ConstructorArgumentValues original)` Deep copy constructor.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addArgumentValues(ConstructorArgumentValues other)` Copy all given argument values into this object, using separate holder instances to keep the values independent from the original object.
    `void` | `addGenericArgumentValue(ConstructorArgumentValues.ValueHolder newValue)` Add a generic argument value to be matched by type or name (if available).
    `void` | `addGenericArgumentValue(Object value)` Add a generic argument value to be matched by type.
    `void` | `addGenericArgumentValue(Object value, String type)` Add a generic argument value to be matched by type.
    `void` | `addIndexedArgumentValue(int index, ConstructorArgumentValues.ValueHolder newValue)` Add an argument value for the given index in the constructor argument list.
    `void` | `addIndexedArgumentValue(int index, Object value)` Add an argument value for the given index in the constructor argument list.
    `void` | `addIndexedArgumentValue(int index, Object value, String type)` Add an argument value for the given index in the constructor argument list.
    `void` | `clear()` Clear this holder, removing all argument values.
    `boolean` | `equals(Object other)`
    `int` | `getArgumentCount()` Return the number of argument values held in this instance, counting both indexed and generic argument values.
    `ConstructorArgumentValues.ValueHolder` | `getArgumentValue(int index, Class<?> requiredType)` Look for an argument value that either corresponds to the given index in the constructor argument list or generically matches by type.
    `ConstructorArgumentValues.ValueHolder` | `getArgumentValue(int index, Class<?> requiredType, String requiredName)` Look for an argument value that either corresponds to the given index in the constructor argument list or generically matches by type.
    `ConstructorArgumentValues.ValueHolder` | `getArgumentValue(int index, Class<?> requiredType, String requiredName, Set<ConstructorArgumentValues.ValueHolder> usedValueHolders)` Look for an argument value that either corresponds to the given index in the constructor argument list or generically matches by type.
    `ConstructorArgumentValues.ValueHolder` | `getGenericArgumentValue(Class<?> requiredType)` Look for a generic argument value that matches the given type.
    `ConstructorArgumentValues.ValueHolder` | `getGenericArgumentValue(Class<?> requiredType, String requiredName)` Look for a generic argument value that matches the given type.
    `ConstructorArgumentValues.ValueHolder` | `getGenericArgumentValue(Class<?> requiredType, String requiredName, Set<ConstructorArgumentValues.ValueHolder> usedValueHolders)` Look for the next generic argument value that matches the given type, ignoring argument values that have already been used in the current resolution process.
    `List<ConstructorArgumentValues.ValueHolder>` | `getGenericArgumentValues()` Return the list of generic argument values.
    `ConstructorArgumentValues.ValueHolder` | `getIndexedArgumentValue(int index, Class<?> requiredType)` Get argument value for the given index in the constructor argument list.
    `ConstructorArgumentValues.ValueHolder` | `getIndexedArgumentValue(int index, Class<?> requiredType, String requiredName)` Get argument value for the given index in the constructor argument list.
    `Map<Integer,ConstructorArgumentValues.ValueHolder>` | `getIndexedArgumentValues()` Return the map of indexed argument values.
    `int` | `hashCode()`
    `boolean` | `hasIndexedArgumentValue(int index)` Check whether an argument value has been registered for the given index.
    `boolean` | `isEmpty()` Return if this holder does not contain any argument values, neither indexed ones nor generic ones.

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

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

- - ### Constructor Detail

    - #### ConstructorArgumentValues

          public ConstructorArgumentValues()

      Create a new empty ConstructorArgumentValues object.

    - #### ConstructorArgumentValues

          public ConstructorArgumentValues(ConstructorArgumentValues original)

      Deep copy constructor.
      Parameters:
        `original` - the ConstructorArgumentValues to copy

  - ### Method Detail

    - #### addArgumentValues

          public void addArgumentValues(ConstructorArgumentValues other)

      Copy all given argument values into this object, using separate holder instances to keep the values independent from the original object.

      Note: Identical ValueHolder instances will only be registered once, to allow for merging and re-merging of argument value definitions. Distinct ValueHolder instances carrying the same content are of course allowed.

    - #### addIndexedArgumentValue

          public void addIndexedArgumentValue(int index,
                                     Object value)

      Add an argument value for the given index in the constructor argument list.
      Parameters:
        `index` - the index in the constructor argument list
        `value` - the argument value

    - #### addIndexedArgumentValue

          public void addIndexedArgumentValue(int index,
                                     Object value,
                                     String type)

      Add an argument value for the given index in the constructor argument list.
      Parameters:
        `index` - the index in the constructor argument list
        `value` - the argument value
        `type` - the type of the constructor argument

    - #### addIndexedArgumentValue

          public void addIndexedArgumentValue(int index,
                                     ConstructorArgumentValues.ValueHolder newValue)

      Add an argument value for the given index in the constructor argument list.
      Parameters:
        `index` - the index in the constructor argument list
        `newValue` - the argument value in the form of a ValueHolder

    - #### hasIndexedArgumentValue

          public boolean hasIndexedArgumentValue(int index)

      Check whether an argument value has been registered for the given index.
      Parameters:
        `index` - the index in the constructor argument list

    - #### getIndexedArgumentValue

          public ConstructorArgumentValues.ValueHolder getIndexedArgumentValue(int index,
                                                                      Class<?> requiredType)

      Get argument value for the given index in the constructor argument list.
      Parameters:
        `index` - the index in the constructor argument list
        `requiredType` - the type to match (can be `null` to match untyped values only)
      Returns:
        the ValueHolder for the argument, or `null` if none set

    - #### getIndexedArgumentValue

          public ConstructorArgumentValues.ValueHolder getIndexedArgumentValue(int index,
                                                                      Class<?> requiredType,
                                                                      String requiredName)

      Get argument value for the given index in the constructor argument list.
      Parameters:
        `index` - the index in the constructor argument list
        `requiredType` - the type to match (can be `null` to match untyped values only)
        `requiredName` - the type to match (can be `null` to match unnamed values only)
      Returns:
        the ValueHolder for the argument, or `null` if none set

    - #### getIndexedArgumentValues

          public Map<Integer,ConstructorArgumentValues.ValueHolder> getIndexedArgumentValues()

      Return the map of indexed argument values.
      Returns:
        unmodifiable Map with Integer index as key and ValueHolder as value
      See Also:
        `ConstructorArgumentValues.ValueHolder`

    - #### addGenericArgumentValue

          public void addGenericArgumentValue(Object value)

      Add a generic argument value to be matched by type.

      Note: A single generic argument value will just be used once, rather than matched multiple times.

      Parameters:
        `value` - the argument value

    - #### addGenericArgumentValue

          public void addGenericArgumentValue(Object value,
                                     String type)

      Add a generic argument value to be matched by type.

      Note: A single generic argument value will just be used once, rather than matched multiple times.

      Parameters:
        `value` - the argument value
        `type` - the type of the constructor argument

    - #### addGenericArgumentValue

          public void addGenericArgumentValue(ConstructorArgumentValues.ValueHolder newValue)

      Add a generic argument value to be matched by type or name (if available).

      Note: A single generic argument value will just be used once, rather than matched multiple times.

      Parameters:
        `newValue` - the argument value in the form of a ValueHolder

        Note: Identical ValueHolder instances will only be registered once, to allow for merging and re-merging of argument value definitions. Distinct ValueHolder instances carrying the same content are of course allowed.

    - #### getGenericArgumentValue

          public ConstructorArgumentValues.ValueHolder getGenericArgumentValue(Class<?> requiredType)

      Look for a generic argument value that matches the given type.
      Parameters:
        `requiredType` - the type to match
      Returns:
        the ValueHolder for the argument, or `null` if none set

    - #### getGenericArgumentValue

          public ConstructorArgumentValues.ValueHolder getGenericArgumentValue(Class<?> requiredType,
                                                                      String requiredName)

      Look for a generic argument value that matches the given type.
      Parameters:
        `requiredType` - the type to match
        `requiredName` - the name to match
      Returns:
        the ValueHolder for the argument, or `null` if none set

    - #### getGenericArgumentValue

          public ConstructorArgumentValues.ValueHolder getGenericArgumentValue(Class<?> requiredType,
                                                                      String requiredName,
                                                                      Set<ConstructorArgumentValues.ValueHolder> usedValueHolders)

      Look for the next generic argument value that matches the given type, ignoring argument values that have already been used in the current resolution process.
      Parameters:
        `requiredType` - the type to match (can be `null` to find an arbitrary next generic argument value)
        `requiredName` - the name to match (can be `null` to not match argument values by name)
        `usedValueHolders` - a Set of ValueHolder objects that have already been used in the current resolution process and should therefore not be returned again
      Returns:
        the ValueHolder for the argument, or `null` if none found

    - #### getGenericArgumentValues

          public List<ConstructorArgumentValues.ValueHolder> getGenericArgumentValues()

      Return the list of generic argument values.
      Returns:
        unmodifiable List of ValueHolders
      See Also:
        `ConstructorArgumentValues.ValueHolder`

    - #### getArgumentValue

          public ConstructorArgumentValues.ValueHolder getArgumentValue(int index,
                                                               Class<?> requiredType)

      Look for an argument value that either corresponds to the given index in the constructor argument list or generically matches by type.
      Parameters:
        `index` - the index in the constructor argument list
        `requiredType` - the parameter type to match
      Returns:
        the ValueHolder for the argument, or `null` if none set

    - #### getArgumentValue

          public ConstructorArgumentValues.ValueHolder getArgumentValue(int index,
                                                               Class<?> requiredType,
                                                               String requiredName)

      Look for an argument value that either corresponds to the given index in the constructor argument list or generically matches by type.
      Parameters:
        `index` - the index in the constructor argument list
        `requiredType` - the parameter type to match
        `requiredName` - the parameter name to match
      Returns:
        the ValueHolder for the argument, or `null` if none set

    - #### getArgumentValue

          public ConstructorArgumentValues.ValueHolder getArgumentValue(int index,
                                                               Class<?> requiredType,
                                                               String requiredName,
                                                               Set<ConstructorArgumentValues.ValueHolder> usedValueHolders)

      Look for an argument value that either corresponds to the given index in the constructor argument list or generically matches by type.
      Parameters:
        `index` - the index in the constructor argument list
        `requiredType` - the parameter type to match (can be `null` to find an untyped argument value)
        `requiredName` - the parameter name to match (can be `null` to find an unnamed argument value)
        `usedValueHolders` - a Set of ValueHolder objects that have already been used in the current resolution process and should therefore not be returned again (allowing to return the next generic argument match in case of multiple generic argument values of the same type)
      Returns:
        the ValueHolder for the argument, or `null` if none set

    - #### getArgumentCount

          public int getArgumentCount()

      Return the number of argument values held in this instance, counting both indexed and generic argument values.

    - #### isEmpty

          public boolean isEmpty()

      Return if this holder does not contain any argument values, neither indexed ones nor generic ones.

    - #### clear

          public void clear()

      Clear this holder, removing all argument values.

    - #### equals

          public boolean equals(Object other)

      Overrides:
        `equals` in class `Object`

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `Object`