Package org.apache.commons.beanutils2

# Class DynaProperty

java.lang.Object
org.apache.commons.beanutils2.DynaProperty

public class DynaProperty extends Object

The metadata describing an individual property of a DynaBean.

The meta contains an optional content type property (`getContentType()`) for use by mapped and iterated properties. A mapped or iterated property may choose to indicate the type it expects. The DynaBean implementation may choose to enforce this type on its entries. Alternatively, an implementation may choose to ignore this property. All keys for maps must be of type String so no meta data is needed for map keys.

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected Class<?>`
  `contentType`
  The (optional) type of content elements for indexed `DynaProperty`
  `static final DynaProperty[]`
  `EMPTY_ARRAY`
  Empty array.
  `protected String`
  `name`
  Property name
  `protected Class<?>`
  `type`
  Property type

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `DynaProperty(String name)`
  Constructs a property that accepts any data type.
  `DynaProperty(String name, Class<?> type)`
  Constructs a property of the specified data type.
  `DynaProperty(String name, Class<?> type, Class<?> contentType)`
  Constructs an indexed or mapped `DynaProperty` that supports (pseudo)-introspection of the content type.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `boolean`
  `equals(Object obj)`
  Checks this instance against the specified Object for equality.
  `Class<?>`
  `getContentType()`
  Gets the (optional) type of the indexed content for `DynaProperty`'s that support this feature.
  `String`
  `getName()`
  Gets the name of this property.
  `Class<?>`
  `getType()`
  Gets the Java class representing the data type of the underlying property values.
  `int`
  `hashCode()`
  `boolean`
  `isIndexed()`
  Does this property represent an indexed value (ie an array or List)?
  `boolean`
  `isMapped()`
  Does this property represent a mapped value (ie a Map)?
  `String`
  `toString()`
  Gets a String representation of this Object.

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

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

- ## Field Details

  - ### EMPTY_ARRAY

    public static final DynaProperty[] EMPTY_ARRAY
    Empty array.

  - ### name

    protected String name
    Property name

  - ### type

    protected transient Class<?> type
    Property type

  - ### contentType

    protected transient Class<?> contentType
    The (optional) type of content elements for indexed `DynaProperty`

- ## Constructor Details

  - ### DynaProperty

    public DynaProperty(String name)
    Constructs a property that accepts any data type.
    Parameters:
      `name` - Name of the property being described

  - ### DynaProperty

    public DynaProperty(String name, Class<?> type)
    Constructs a property of the specified data type.
    Parameters:
      `name` - Name of the property being described
      `type` - Java class representing the property data type

  - ### DynaProperty

    public DynaProperty(String name, Class<?> type, Class<?> contentType)
    Constructs an indexed or mapped `DynaProperty` that supports (pseudo)-introspection of the content type.
    Parameters:
      `name` - Name of the property being described
      `type` - Java class representing the property data type
      `contentType` - Class that all indexed or mapped elements are instances of

- ## Method Details

  - ### equals

    public boolean equals(Object obj)
    Checks this instance against the specified Object for equality. Overrides the default reference test for equality provided by `Object.equals(Object)`
    Overrides:
      `equals` in class `Object`
    Parameters:
      `obj` - The object to compare to
    Returns:
      `true` if object is a dyna property with the same name type and content type, otherwise `false`
    Since:
      1.8.0

  - ### getContentType

    public Class<?> getContentType()
    Gets the (optional) type of the indexed content for `DynaProperty`'s that support this feature.

    There are issues with serializing primitive class types on certain JVM versions (including Java 1.3). Therefore, this field must not be serialized using the standard methods.

    Returns:
      the Class for the content type if this is an indexed `DynaProperty` and this feature is supported. Otherwise null.

  - ### getName

    public String getName()
    Gets the name of this property.
    Returns:
      the name of the property

  - ### getType

    public Class<?> getType()

    Gets the Java class representing the data type of the underlying property values.

    There are issues with serializing primitive class types on certain JVM versions (including Java 1.3). Therefore, this field must not be serialized using the standard methods.

    Please leave this field as `transient`

    Returns:
      the property type

  - ### hashCode

    public int hashCode()
    Overrides:
      `hashCode` in class `Object`
    Returns:
      the hash code for this dyna property
    Since:
      1.8.0
    See Also:
      - `Object.hashCode()`

  - ### isIndexed

    public boolean isIndexed()
    Does this property represent an indexed value (ie an array or List)?
    Returns:
      `true` if the property is indexed (i.e. is a List or array), otherwise `false`

  - ### isMapped

    public boolean isMapped()
    Does this property represent a mapped value (ie a Map)?
    Returns:
      `true` if the property is a Map otherwise `false`

  - ### toString

    public String toString()
    Gets a String representation of this Object.
    Overrides:
      `toString` in class `Object`
    Returns:
      a String representation of the dyna property