| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 javax.faces.el; |
| |
| /** |
| * Provides methods to read, write and inspect properties of javabeans, Maps, |
| * Arrays and Lists. This class is used by such things as the ValueBinding |
| * implementation and the ManagedBeanBuilder to access JSF beans. |
| * |
| * See the javadoc of the <a href="http://java.sun.com/j2ee/javaserverfaces/1.1_01/docs/api/index.html">JSF Specification</a> |
| * for more details. |
| * |
| * @author Thomas Spiegl (latest modification by $Author$) |
| * @version $Revision$ $Date$ |
| */ |
| public abstract class PropertyResolver |
| { |
| |
| public PropertyResolver() |
| { |
| } |
| |
| /** |
| * Returns the datatype of the specified element within a list or array. |
| * <p> |
| * Param base must be of type Array or List. |
| */ |
| public abstract Class getType(Object base, int index) |
| throws EvaluationException, PropertyNotFoundException; |
| |
| /** |
| * Returns the datatype of the specified javabean property on the |
| * specified object. |
| * <p> |
| * Param base may be a map, in which case param property is used |
| * as a key into the map, and the type of the object with that key |
| * is returned. If there is no such key in the map, then Object.class |
| * is returned. |
| * <p> |
| * Otherwise java.beans.Introspector is used to determine the actual |
| * property type. If the base bean has no such property then a |
| * PropertyNotFoundException is thrown. |
| * |
| * @param base must not be null. |
| * @param property must be of type String, must not be null and |
| * must not be an empty string. |
| */ |
| public abstract Class getType(Object base, java.lang.Object property) |
| throws EvaluationException, PropertyNotFoundException; |
| |
| /** |
| * Return the specified element from a list or array. |
| * <p> |
| * Param base must be of type Array or List. When the array is of a |
| * primitive type, the appropriate wrapper is returned. |
| * <p> |
| * Null is returned when param index is "out of bounds" for the provided |
| * base object. |
| * |
| * @throws ReferenceSyntaxException if the base object is not an Array |
| * or List. |
| */ |
| public abstract Object getValue(Object base, int index) |
| throws EvaluationException, PropertyNotFoundException; |
| |
| /** |
| * Return the current value of the specified property on the base |
| * object. |
| * <p> |
| * If base is a Map, then Map.get(property) is returned. Null is |
| * returned if there is no entry with that key. |
| * <p> |
| * Otherwise, java.beans.Introspector is applied to the base object |
| * to find the associated PropertyDescriptor and the specified |
| * read method is invoked. |
| * |
| * @throws PropertyNotFoundException if the provided object does |
| * not have the specified property. |
| */ |
| public abstract Object getValue(Object base, java.lang.Object property) |
| throws EvaluationException, PropertyNotFoundException; |
| |
| public abstract boolean isReadOnly(Object base, int index) |
| throws EvaluationException, PropertyNotFoundException; |
| |
| public abstract boolean isReadOnly(Object base, java.lang.Object property) |
| throws EvaluationException, PropertyNotFoundException; |
| |
| /** |
| * Replace the object at the specified index within the base collection |
| * with the provided value. |
| * <p> |
| * Param base is expected to be an Array or List object. |
| * |
| * @throws EvaluationException if the base object is not an Array or List. |
| * @throws PropertyNotFoundException if the index is "out of bounds". |
| */ |
| public abstract void setValue(Object base, int index, java.lang.Object value) |
| throws EvaluationException, PropertyNotFoundException; |
| |
| /** |
| * Set the named property on the base object to the provided value. |
| */ |
| public abstract void setValue(Object base, Object property, java.lang.Object value) |
| throws EvaluationException, PropertyNotFoundException; |
| } |