DeleteActionLink.java

/*
 * 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 ro.nextreports.server.web.action;

import javax.jcr.ReferentialIntegrityException;

import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.spring.injection.annot.SpringBean;
import org.springframework.transaction.TransactionSystemException;

import ro.nextreports.server.domain.Entity;
import ro.nextreports.server.exception.NotFoundException;
import ro.nextreports.server.exception.ReferenceException;
import ro.nextreports.server.service.StorageService;
import ro.nextreports.server.util.StorageUtil;
import ro.nextreports.server.web.NextServerSession;
import ro.nextreports.server.web.common.behavior.AlertBehavior;
import ro.nextreports.server.web.common.event.AjaxUpdateEvent;
import ro.nextreports.server.web.core.EntityBrowserPanel;
import ro.nextreports.server.web.core.action.ActionConfirmAjaxLink;
import ro.nextreports.server.web.core.action.ActionContext;
import ro.nextreports.server.web.core.event.SelectEntityEvent;

import java.util.List;
import java.util.ArrayList;

/**
 * @author Decebal Suiu
 */
public class DeleteActionLink extends ActionConfirmAjaxLink {
	
	// max number of references to show to user
	private static final int MAX_REFERENCES=10;

    @SpringBean
    private StorageService storageService;

    public DeleteActionLink(ActionContext actionContext, String message) {
        super(actionContext, message);
    }

    public void executeAction(AjaxRequestTarget target) {
        EntityBrowserPanel panel = findParent(EntityBrowserPanel.class);
        if (getActionContext().isMenuAction()) {
            NextServerSession.get().setSearchContext(null);
            panel.restoreWorkspace(target);
        }

        String entityPath = getActionContext().getEntity().getPath();
        List<String> ids  = new ArrayList<String>();
        for (Entity entity : getActionContext().getEntities()) {
            ids.add(entity.getId());
        }        
        try {
            try {
                // IMPORTANT : see EntitiesRemoveAdvice , ReportRemovedAdvice, SchedulerJobRemovedAdvice,
                // UserRemovedAdvice
                storageService.removeEntitiesById(ids);
            } catch (TransactionSystemException e) {
                if (e.getRootCause() instanceof ReferentialIntegrityException) {
                    throw new ReferenceException(e.getRootCause());
                }
            }
            
            if (panel.isForward(target)) {
                new AjaxUpdateEvent(this, target).fire();
            } else {
                Entity parent = storageService.getEntity(StorageUtil.getParentPath(entityPath));
                new SelectEntityEvent(this, target, parent).fire();
            }
		} catch (ReferenceException e) {
			String message = e.getMessage();
			try {				
				List<String> refs = storageService.getReferences(ids);				
				if (refs.size() > 0) {
					StringBuilder sb = new StringBuilder(getString("References.exists"));
					sb.append(":\\n\\n");
					int no = 1;
					for (int i=0; i<refs.size(); i++) {
						if (i < MAX_REFERENCES) {
							sb.append(refs.get(i));
							sb.append("\\n");
						} else {
							break;
						}
					}
					if (MAX_REFERENCES < refs.size()) {
						sb.append("...\\n");
					}
					message = sb.toString();					
				}
			} catch (Throwable e1) {				
				e1.printStackTrace();
			}			
			add(new AlertBehavior(message));
			target.add(this);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}