PropertyDescriptor

AI-generated Key Takeaways

• The PropertyDescriptor class describes a single property of a Java Bean, providing information about its type, read and write methods, and constraints.

• It inherits from FeatureDescriptor and provides methods to access and modify property attributes.

• Includes constructors to initialize a PropertyDescriptor using property name, bean class, and getter/setter methods or names.

• PropertyEditor support isn't available in j2objc due to its dependency on AWT classes.

• Offers methods like getPropertyType, getReadMethod, getWriteMethod to retrieve property information and setReadMethod, setWriteMethod to modify it.

public class PropertyDescriptor extends FeatureDescriptor

Known Direct Subclasses IndexedPropertyDescriptor IndexedPropertyDescriptor

Describes one Java Bean property. NOTE: PropertyEditor support is not available in j2objc, since it depends on core AWT classes.

Public Constructor Summary

	PropertyDescriptor(String propertyName, Class<?> beanClass, String getterName, String setterName)
	PropertyDescriptor(String propertyName, Method getter, Method setter)
	PropertyDescriptor(String propertyName, Class<?> beanClass)

Public Method Summary

boolean	equals(Object object) Compares this instance with the specified object and indicates if they are equal.
Class<?>	getPropertyType()
Method	getReadMethod()
Method	getWriteMethod()
int	hashCode() Returns an integer hash code for this object.
boolean	isBound()
boolean	isConstrained()
void	setBound(boolean bound)
void	setConstrained(boolean constrained)
void	setReadMethod(Method getter)
void	setWriteMethod(Method setter)

Inherited Method Summary

From class java.beans.FeatureDescriptor

Enumeration<String>	attributeNames() Enumerates the attribute names.
String	getDisplayName() Gets the display name or getName() if not set.
String	getName() Gets the name.
String	getShortDescription() Gets the short description or getDisplayName() if not set.
Object	getValue(String attributeName) Gets the value associated with the named attribute.
boolean	isExpert() Indicates if this feature is an expert feature.
boolean	isHidden() Indicates if this feature is hidden.
boolean	isPreferred() Indicates if this feature is preferred.
void	setDisplayName(String displayName) Sets the display name.
void	setExpert(boolean expert) Sets the expert indicator.
void	setHidden(boolean hidden) Sets the hidden indicator.
void	setName(String name) Sets the name.
void	setPreferred(boolean preferred) Sets the preferred indicator.
void	setShortDescription(String text) Sets the short description.
void	setValue(String attributeName, Object value) Sets the value for the named attribute.

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

Public Constructors

public PropertyDescriptor (String propertyName, Class<?> beanClass, String getterName, String setterName)

Parameters

propertyName
beanClass
getterName
setterName

Throws

IntrospectionException

public PropertyDescriptor (String propertyName, Method getter, Method setter)

Parameters

propertyName
getter
setter

Throws

IntrospectionException

public PropertyDescriptor (String propertyName, Class<?> beanClass)

Parameters

propertyName
beanClass

Throws

IntrospectionException

Public Methods

public boolean equals (Object object)

Compares this instance with the specified object and indicates if they are equal. In order to be equal, o must represent the same object as this instance using a class-specific comparison. The general contract is that this comparison should be reflexive, symmetric, and transitive. Also, no object reference other than null is equal to null.

The default implementation returns true only if this == o. See Writing a correct equals method if you intend implementing your own equals method.

The general contract for the equals and hashCode() methods is that if equals returns true for any two objects, then hashCode() must return the same value for these objects. This means that subclasses of Object usually override either both methods or neither of them.

Parameters

object	the object to compare this instance with.

Returns

• true if the specified object is equal to this Object; false otherwise.

public Class<?> getPropertyType ()

public Method getReadMethod ()

public Method getWriteMethod ()

public int hashCode ()

Returns an integer hash code for this object. By contract, any two objects for which equals(Object) returns true must return the same hash code value. This means that subclasses of Object usually override both methods or neither method.

Note that hash values must not change over time unless information used in equals comparisons also changes.

See Writing a correct hashCode method if you intend implementing your own hashCode method.

Returns

• this object's hash code.

public boolean isBound ()

public boolean isConstrained ()

public void setBound (boolean bound)

Parameters

bound

public void setConstrained (boolean constrained)

Parameters

constrained

public void setReadMethod (Method getter)

Parameters

getter

Throws

IntrospectionException

public void setWriteMethod (Method setter)

Parameters

setter

Throws

IntrospectionException