- java.lang.Object
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- java.beans.FeatureDescriptor
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- java.beans.PropertyDescriptor
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- java.beans.IndexedPropertyDescriptor
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public class IndexedPropertyDescriptor extends PropertyDescriptor
An IndexedPropertyDescriptor describes a property that acts like an array and has an indexed read and/or indexed write method to access specific elements of the array.An indexed property may also provide simple non-indexed read and write methods. If these are present, they read and write arrays of the type returned by the indexed read method.
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Constructor Summary
Constructors Constructor and Description IndexedPropertyDescriptor(String propertyName, Class<?> beanClass)
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.IndexedPropertyDescriptor(String propertyName, Class<?> beanClass, String readMethodName, String writeMethodName, String indexedReadMethodName, String indexedWriteMethodName)
This constructor takes the name of a simple property, and method names for reading and writing the property, both indexed and non-indexed.IndexedPropertyDescriptor(String propertyName, Method readMethod, Method writeMethod, Method indexedReadMethod, Method indexedWriteMethod)
This constructor takes the name of a simple property, and Method objects for reading and writing the property.
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Method Summary
Methods Modifier and Type Method and Description boolean
equals(Object obj)
Compares thisPropertyDescriptor
against the specified object.Class<?>
getIndexedPropertyType()
Returns the Java type info for the indexed property.Method
getIndexedReadMethod()
Gets the method that should be used to read an indexed property value.Method
getIndexedWriteMethod()
Gets the method that should be used to write an indexed property value.int
hashCode()
Returns a hash code value for the object.void
setIndexedReadMethod(Method readMethod)
Sets the method that should be used to read an indexed property value.void
setIndexedWriteMethod(Method writeMethod)
Sets the method that should be used to write an indexed property value.-
Methods inherited from class java.beans.PropertyDescriptor
createPropertyEditor, getPropertyEditorClass, getPropertyType, getReadMethod, getWriteMethod, isBound, isConstrained, setBound, setConstrained, setPropertyEditorClass, setReadMethod, setWriteMethod
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Methods inherited from class java.beans.FeatureDescriptor
attributeNames, getDisplayName, getName, getShortDescription, getValue, isExpert, isHidden, isPreferred, setDisplayName, setExpert, setHidden, setName, setPreferred, setShortDescription, setValue, toString
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Constructor Detail
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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.
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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.
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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.
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Method Detail
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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.
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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
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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.
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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
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getIndexedPropertyType
public Class<?> getIndexedPropertyType()
Returns the Java type info for the indexed property. Note that theClass
object may describe primitive Java types such asint
. 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, ornull
if the type cannot be determined
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equals
public boolean equals(Object obj)
Compares thisPropertyDescriptor
against the specified object. Returns true if the objects are the same. TwoPropertyDescriptor
s are the same if the read, write, property types, property editor and flags are equivalent.- Overrides:
equals
in classPropertyDescriptor
- 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
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hashCode
public int hashCode()
Returns a hash code value for the object. SeeObject.hashCode()
for a complete description.- Overrides:
hashCode
in classPropertyDescriptor
- Returns:
- a hash code value for this object.
- Since:
- 1.5
- See Also:
Object.equals(java.lang.Object)
,System.identityHashCode(java.lang.Object)
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Dokument erstellt 11/06/2005, zuletzt geändert 04/03/2020
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/java-api-rf-java/beans/IndexedPropertyDescriptor.html
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