// 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); | |
} |