| // Copyright 2006 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry5.ioc.services; |
| |
| /** |
| * A wrapper around the JavaBean Introspector that allows more manageable access to JavaBean properties of objects. |
| * <p/> |
| * <p/> |
| * Only provides access to <em>simple</em> properties. Indexed properties are ignored. |
| */ |
| public interface PropertyAccess |
| { |
| /** |
| * Reads the value of a property. |
| * |
| * @throws UnsupportedOperationException if the property is write only |
| * @throws IllegalArgumentException if property does not exist |
| */ |
| Object get(Object instance, String propertyName); |
| |
| /** |
| * Updates the value of a property. |
| * |
| * @throws UnsupportedOperationException if the property is read only |
| * @throws IllegalArgumentException if property does not exist |
| */ |
| void set(Object instance, String propertyName, Object value); |
| |
| /** |
| * Returns the adapter for a particular object instance. A convienience over invoking {@link #getAdapter(Class)}. |
| */ |
| ClassPropertyAdapter getAdapter(Object instance); |
| |
| /** |
| * Returns the adapter used to access properties within the indicated class. |
| */ |
| ClassPropertyAdapter getAdapter(Class forClass); |
| |
| /** |
| * Discards all stored property access information, discarding all created class adapters. |
| */ |
| void clearCache(); |
| } |