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Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class IndexedPropertyDescriptor - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.beans
Class IndexedPropertyDescriptor

java.lang.Object
  |
  +--java.beans.FeatureDescriptor
        |
        +--java.beans.PropertyDescriptor
              |
              +--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

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 getterName, String setterName, String indexedGetterName, String indexedSetterName)           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 getter, Method setter, Method indexedGetter, Method indexedSetter)           This constructor takes the name of a simple property, and Method objects for reading and writing the property.

 

Method Summary
Class	getIndexedPropertyType()           Gets the Class object of the indexed properties' type.
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.
void	setIndexedReadMethod(Method getter)           Sets the method that should be used to read an indexed property value.
void	setIndexedWriteMethod(Method setter)           Sets the method that should be used to write an indexed property value.

 

Methods inherited from class java.beans.PropertyDescriptor

getPropertyEditorClass, getPropertyType, getReadMethod, getWriteMethod, isBound, isConstrained, setBound, setConstrained, setPropertyEditorClass, setReadMethod, setWriteMethod

 

Methods inherited from class java.beans.FeatureDescriptor

attributeNames, getDisplayName, getName, getShortDescription, getValue, isExpert, isHidden, isPreferred, setDisplayName, setExpert, setHidden, setName, setPreferred, setShortDescription, setValue

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

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.

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IndexedPropertyDescriptor

public IndexedPropertyDescriptor(String propertyName,
                                 Class beanClass,
                                 String getterName,
                                 String setterName,
                                 String indexedGetterName,
                                 String indexedSetterName)
                          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.

getterName - 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.

setterName - 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.

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

indexedSetterName - 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 getter,
                                 Method setter,
                                 Method indexedGetter,
                                 Method indexedSetter)
                          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.

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

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

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

indexedSetter - 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.

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setIndexedReadMethod

public void setIndexedReadMethod(Method getter)
                          throws IntrospectionException

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

Parameters:

getter - The new indexed getter method.

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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 setter)
                           throws IntrospectionException

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

Parameters:

getter - The new indexed setter method.

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getIndexedPropertyType

public Class getIndexedPropertyType()

Gets the Class object of the indexed properties' type. This is the type that will be returned by the indexedReadMethod.

Returns:

The Java Class for the indexed properties type. Note that the Class may describe a primitive Java type such as "int".

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