Java java.beans Class IndexedPropertyDescriptor（JDK8）

Constructor Detail

• IndexedPropertyDescriptor

  public IndexedPropertyDescriptor(String propertyName,
                                   Class<?> beanClass)
                            throws IntrospectionException

  This constructor constructs an IndexedPropertyDescriptor for a property that follows the standard Java conventions by having getFoo and setFoo accessor methods, for both indexed access and array access.

  Thus if the argument name is "fred", it will assume that there is an indexed reader method "getFred", a non-indexed (array) reader method also called "getFred", an indexed writer method "setFred", and finally a non-indexed writer method "setFred".

  Parameters:

  propertyName - The programmatic name of the property.

  beanClass - The Class object for the target bean.

  Throws:

  IntrospectionException - if an exception occurs during introspection.

• IndexedPropertyDescriptor

  public IndexedPropertyDescriptor(String propertyName,
                                   Class<?> beanClass,
                                   String readMethodName,
                                   String writeMethodName,
                                   String indexedReadMethodName,
                                   String indexedWriteMethodName)
                            throws IntrospectionException

  This constructor takes the name of a simple property, and method names for reading and writing the property, both indexed and non-indexed.

  Parameters:

  propertyName - The programmatic name of the property.

  beanClass - The Class object for the target bean.

  readMethodName - The name of the method used for reading the property values as an array. May be null if the property is write-only or must be indexed.

  writeMethodName - The name of the method used for writing the property values as an array. May be null if the property is read-only or must be indexed.

  indexedReadMethodName - The name of the method used for reading an indexed property value. May be null if the property is write-only.

  indexedWriteMethodName - The name of the method used for writing an indexed property value. May be null if the property is read-only.

  Throws:

  IntrospectionException - if an exception occurs during introspection.

• IndexedPropertyDescriptor

  public IndexedPropertyDescriptor(String propertyName,
                                   Method readMethod,
                                   Method writeMethod,
                                   Method indexedReadMethod,
                                   Method indexedWriteMethod)
                            throws IntrospectionException

  This constructor takes the name of a simple property, and Method objects for reading and writing the property.

  Parameters:

  propertyName - The programmatic name of the property.

  readMethod - The method used for reading the property values as an array. May be null if the property is write-only or must be indexed.

  writeMethod - The method used for writing the property values as an array. May be null if the property is read-only or must be indexed.

  indexedReadMethod - The method used for reading an indexed property value. May be null if the property is write-only.

  indexedWriteMethod - The method used for writing an indexed property value. May be null if the property is read-only.

  Throws:

  IntrospectionException - if an exception occurs during introspection.

Method Detail

• getIndexedReadMethod

  public Method getIndexedReadMethod()

  Gets the method that should be used to read an indexed property value.

  Returns:

  The method that should be used to read an indexed property value. May return null if the property isn't indexed or is write-only.

• setIndexedReadMethod

  public void setIndexedReadMethod(Method readMethod)
                            throws IntrospectionException

  Sets the method that should be used to read an indexed property value.

  Parameters:

  readMethod - The new indexed read method.

  Throws:

  IntrospectionException - if an exception occurs during introspection.

• getIndexedWriteMethod

  public Method getIndexedWriteMethod()

  Gets the method that should be used to write an indexed property value.

  Returns:

  The method that should be used to write an indexed property value. May return null if the property isn't indexed or is read-only.

• setIndexedWriteMethod

  public void setIndexedWriteMethod(Method writeMethod)
                             throws IntrospectionException

  Sets the method that should be used to write an indexed property value.

  Parameters:

  writeMethod - The new indexed write method.

  Throws:

  IntrospectionException - if an exception occurs during introspection.

• getIndexedPropertyType

  public Class<?> getIndexedPropertyType()

  Returns the Java type info for the indexed property. Note that the Class object may describe primitive Java types such as int. This type is returned by the indexed read method or is used as the parameter type of the indexed write method.

  Returns:

  the Class object that represents the Java type info, or null if the type cannot be determined

• equals

  public boolean equals(Object obj)

  Compares this PropertyDescriptor against the specified object. Returns true if the objects are the same. Two PropertyDescriptors are the same if the read, write, property types, property editor and flags are equivalent.

  Overrides:

  equals in class PropertyDescriptor

  Parameters:

  obj - the reference object with which to compare.

  Returns:

  true if this object is the same as the obj argument; false otherwise.

  Since:

  1.4

  See Also:

  Object.hashCode(), HashMap

• hashCode

  public int hashCode()

  Returns a hash code value for the object. See Object.hashCode() for a complete description.

  Overrides:

  hashCode in class PropertyDescriptor

  Returns:

  a hash code value for this object.

  Since:

  1.5

  See Also:

  Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)