| /* |
| * 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 org.apache.empire.struts2.websample.web.actiontypes; |
| |
| import org.apache.empire.data.Record; |
| import org.apache.empire.data.bean.BeanClass; |
| import org.apache.empire.data.bean.BeanRecordProxy; |
| import org.apache.empire.exceptions.ItemNotFoundException; |
| import org.apache.empire.exceptions.NotSupportedException; |
| import org.apache.empire.struts2.actionsupport.BeanActionSupport; |
| import org.apache.empire.struts2.actionsupport.SessionPersistence; |
| import org.apache.empire.struts2.exceptions.InvalidFormDataException; |
| |
| import com.opensymphony.xwork2.interceptor.NoParameters; |
| |
| |
| /** |
| * BeanDetailAction |
| * <p> |
| * This class allows using a JavaBean or Data Transfer Object (DTO) for form data processing. |
| * Metadata for the Beans should be provided using the BeanClass and BeanProperty classes. |
| * </p> |
| * @author Rainer |
| */ |
| public abstract class BeanDetailAction<T> extends DetailAction |
| implements NoParameters // set this to provide custom parameter handling |
| { |
| protected final BeanActionSupport<T> beanSupport; |
| |
| /** |
| * Constructs a BeanDetailAction from a BeanRecordProxy object |
| * @param record the BeanRecordProxy for the bean |
| * @param persistence persistence level |
| */ |
| public BeanDetailAction(BeanRecordProxy<T> record, SessionPersistence persistence) |
| { |
| beanSupport = new BeanActionSupport<T>(this, record, persistence); |
| } |
| |
| /** |
| * Constructs a BeanDetailAction from a BeanClass definition |
| * @param beanClass the bean class defining the bean's metadata |
| * @param persistence persistence level |
| */ |
| public BeanDetailAction(BeanClass beanClass, SessionPersistence persistence) |
| { |
| beanSupport = new BeanActionSupport<T>(this, beanClass, persistence); |
| } |
| |
| /** |
| * Returns the Record interface implmentation for the bean. |
| * @return the Record interface implementation for the bean. |
| */ |
| public Record getRecord() |
| { |
| return beanSupport.getRecord(); |
| } |
| |
| @Override |
| public String doCreate() |
| { |
| T bean = createBean(); |
| if (bean==null) |
| { // Must have an action error set! |
| if (!hasActionError()) |
| setActionError(new NotSupportedException(beanSupport, "createBean")); |
| return doCancel(); |
| } |
| beanSupport.setData(bean); |
| return INPUT; |
| } |
| |
| @Override |
| public String doLoad() |
| { |
| // Read Record |
| Object[] key = beanSupport.getActionParamKey(); |
| if (key!=null) |
| { // Load the bean |
| T bean = loadBean(key); |
| if (bean==null) |
| { // Must have an action error set! |
| if (!hasActionError()) |
| setActionError(new ItemNotFoundException(beanSupport.getRecordKeyString())); |
| return doCancel(); |
| } |
| beanSupport.setData(bean); |
| } |
| // Check if record is valid |
| if (beanSupport.isValid()==false) |
| { |
| setActionError(new InvalidFormDataException()); |
| return doCancel(); |
| } |
| // Test |
| return INPUT; |
| } |
| |
| @Override |
| public String doDelete() |
| { |
| Object[] key = null; |
| if (beanSupport.hasActionKey(true)) |
| { |
| if (beanSupport.getActionParamNewFlag()==false) |
| key = beanSupport.getActionParamKey(); |
| } |
| else |
| { // Get the bean key |
| if (beanSupport.getRecord().isNew()==false) |
| key = beanSupport.getRecordKeyValues(); |
| } |
| // Delete the bean |
| if (key!=null && deleteBean(key)==false) |
| { // An Error has occurred; |
| return doCancel(); |
| } |
| // Clear Data |
| beanSupport.setData(null); |
| return RETURN; |
| } |
| |
| @Override |
| public String doSave() { |
| |
| // bean Support |
| if (beanSupport.isValid()==false) |
| { // Create new or reload existing item |
| T bean; |
| if (beanSupport.getActionParamNewFlag()) |
| { // crate new Item |
| bean = createBean(); |
| } |
| else |
| { // reload existing item |
| bean = loadBean(beanSupport.getActionParamKey()); |
| } |
| if (bean==null) |
| { // Must have an action error set! |
| if (!hasActionError()) |
| setActionError(new ItemNotFoundException(beanSupport.getRecordKeyString())); |
| return doCancel(); |
| } |
| beanSupport.setData(bean); |
| } |
| else if (beanSupport.getRecord().isNew()==false) |
| { // Check whether we have the right key |
| if (!beanSupport.checkKey()) |
| { // Record's don't match |
| setActionError(new InvalidFormDataException()); |
| return doCancel(); |
| } |
| } |
| // LoadFormData |
| if (beanSupport.loadFormData()==false) |
| { // Error loading form data |
| return INPUT; |
| } |
| |
| // Save the record |
| boolean isNew = beanSupport.getRecord().isNew(); |
| if (saveBean(beanSupport.getData(), isNew)==false) |
| { // Error saving bean |
| return INPUT; |
| } |
| |
| // Record has been saved successfully |
| // beanSupport.updateSessionKey(); |
| beanSupport.setData(null); |
| |
| return RETURN; |
| } |
| |
| // ------- overridables ------- |
| |
| /** |
| * Returns the bean for the supplied object key. |
| * If an error occurs the function must set an action error and return null. |
| * @return the bean object |
| */ |
| protected abstract T createBean(); |
| |
| /** |
| * Returns the bean for the supplied object key. |
| * If an error occurs the function must set an action error and return null. |
| * @param key the bean's key values |
| * @return the bean object |
| */ |
| protected abstract T loadBean(Object[] key); |
| |
| /** |
| * Saves a bean object |
| * @param bean |
| * @param isNew true the bean is a newly created object or false otherwise |
| * @return true if the bean has been stored successfully or false otherwise |
| */ |
| protected abstract boolean saveBean(T bean, boolean isNew); |
| |
| /** |
| * Deletes a bean object |
| * @param key |
| * @return true if the bean has been stored successfully or false otherwise |
| */ |
| protected abstract boolean deleteBean(Object[] key); |
| |
| } |