/*
* $Id$
*
* 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.struts2.showcase.action;
import com.opensymphony.xwork2.ActionSupport;
import org.apache.log4j.Logger;
import org.apache.struts2.showcase.dao.Dao;
import org.apache.struts2.showcase.model.IdEntity;
import java.io.Serializable;
import java.util.Collection;
/**
* AbstractCRUDAction.
*/
public abstract class AbstractCRUDAction extends ActionSupport {
private static final Logger log = Logger.getLogger(AbstractCRUDAction.class);
private Collection availableItems;
private String[] toDelete;
protected abstract Dao getDao();
public Collection getAvailableItems() {
return availableItems;
}
public String[] getToDelete() {
return toDelete;
}
public void setToDelete(String[] toDelete) {
this.toDelete = toDelete;
}
public String list() throws Exception {
this.availableItems = getDao().findAll();
if (log.isDebugEnabled()) {
log.debug("AbstractCRUDAction - [list]: " + (availableItems != null ? "" + availableItems.size() : "no") + " items found");
}
return execute();
}
public String delete() throws Exception {
if (toDelete != null) {
int count = 0;
for (int i = 0, j = toDelete.length; i < j; i++) {
count = count + getDao().delete(toDelete[i]);
}
if (log.isDebugEnabled()) {
log.debug("AbstractCRUDAction - [delete]: " + count + " items deleted.");
}
}
return SUCCESS;
}
/**
* Utility method for fetching already persistent object from storage for usage in params-prepare-params cycle.
*
* @param tryId The id to try to get persistent object for
* @param tryObject The object, induced by first params invocation, possibly containing id to try to get persistent
* object for
* @return The persistent object, if found. <tt>null</tt> otherwise.
*/
protected IdEntity fetch(Serializable tryId, IdEntity tryObject) {
IdEntity result = null;
if (tryId != null) {
result = getDao().get(tryId);
} else if (tryObject != null) {
result = getDao().get(tryObject.getId());
}
return result;
}
}