oracle.ifs.fdk.impl.ah

Class MappedValueAttributeHandler

java.lang.Object

oracle.ifs.fdk.impl.ah.ReadOnlyAttributeHandler

oracle.ifs.fdk.impl.ah.MappedValueAttributeHandler

All Implemented Interfaces:

AttributeHandler

public class MappedValueAttributeHandler
extends ReadOnlyAttributeHandler

Attribute handler which can wrap another handler and map the return values to another value.

Constructor Summary

Constructors

Constructor and Description
MappedValueAttributeHandler(AttributeHandler ah, Map valueMap) Constructor.

Method Summary

Modifier and Type	Method and Description
boolean	canHandle(AttributeHandlerContext context) Returns true if this handler can handle the attribute request on the given object instance.
Object	getValue(AttributeHandlerContext context) Returns the value of an attribute.

Methods inherited from class oracle.ifs.fdk.impl.ah.ReadOnlyAttributeHandler

canUpdate, setValue

Methods inherited from class java.lang.Object

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

Constructor Detail

MappedValueAttributeHandler

public MappedValueAttributeHandler(AttributeHandler ah,
                                   Map valueMap)

Constructor.

Parameters:

ah - The attribute handler whose values are to be mapped.

valueMap - The map of values to be mapped. All possible values that the wrapepd attribute handler can return need to be in the map otherwise null will be returned for the non-existent values.

Method Detail

canHandle

public boolean canHandle(AttributeHandlerContext context)
                  throws FdkException,
                         IfsException

Description copied from interface: AttributeHandler

Returns true if this handler can handle the attribute request on the given object instance. The necessary information to determine which attribute is requested and what the underlying repository object is will be packaged in the context.

Parameters:

context - The context when this handler is called.

Throws:

FdkException - If a framework error occurs.

IfsException - If a repository exception occurs.

getValue

public Object getValue(AttributeHandlerContext context)
                throws FdkException,
                       IfsException

Description copied from interface: AttributeHandler

Returns the value of an attribute. This method must throw a RuntimeException if canHandle() returns false and this method is still being called.

Note that implementations which handle read-only attributes should subclass ReadOnlyAttributeHandler for convenience as they would need to provide the read side methods only.

Parameters:

context - The context when this handler is called.

Throws:

FdkException - If a framework error occurs.

IfsException - If a repository exception occurs.