| // 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.services; |
| |
| /** |
| * Encapsulates persisted property information for an entire page. |
| */ |
| public interface PersistentFieldBundle |
| { |
| /** |
| * Checks to see if a persistent value has been stored for the indicated component and field. TODO: This method can |
| * probably be removed; it doesn't look like its used (instead, we if check getValue() returns null). |
| * |
| * @param componentId the nested id of the component (within the page), may be null or blank for the root component |
| * of the page |
| * @param fieldName the name of the field whose value was persisted |
| * @return true if a change has been stored |
| */ |
| boolean containsValue(String componentId, String fieldName); |
| |
| /** |
| * @param componentId the nested if of the component (within the page), may be null or blank for the root component |
| * of the page |
| * @param fieldName the name of the field whose value was persisted |
| * @return the persisted value, possibly null |
| */ |
| Object getValue(String componentId, String fieldName); |
| } |