java.beans

Class IndexedPropertyDescriptor

Inhoudsopgave

  • 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.

    • 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

      • 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

      • 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

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Document heeft de 11/06/2005 gemaakt, de laatste keer de 04/03/2020 gewijzigd
Bron van het afgedrukte document:https://www.gaudry.be/nl/java-api-rf-java/beans/indexedpropertydescriptor.html

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