Package 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:

  • Constructor Details

    • ConstructorArgumentValues

      public ConstructorArgumentValues()
      Create a new empty ConstructorArgumentValues object.

    • ConstructorArgumentValues

      public ConstructorArgumentValues(ConstructorArgumentValues original)
      Deep copy constructor.
      Parameters:
      original - the ConstructorArgumentValues to copy

  • Method Details

    • addArgumentValues

      public void addArgumentValues(@Nullable 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, @Nullable 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, @Nullable 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

      @Nullable public ConstructorArgumentValues.ValueHolder getIndexedArgumentValue(int index, @Nullable 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

      @Nullable public ConstructorArgumentValues.ValueHolder getIndexedArgumentValue(int index, @Nullable Class<?> requiredType, @Nullable 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, or empty String to match any name)
      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:

    • 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

      @Nullable 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

      @Nullable 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

      @Nullable public ConstructorArgumentValues.ValueHolder getGenericArgumentValue(@Nullable Class<?> requiredType, @Nullable String requiredName, @Nullable 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, or empty String to match any 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:

    • getArgumentValue

      @Nullable 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

      @Nullable 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

      @Nullable public ConstructorArgumentValues.ValueHolder getArgumentValue(int index, @Nullable Class<?> requiredType, @Nullable String requiredName, @Nullable 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, or empty String to match any name)
      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(@Nullable Object other)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object