com.bluexml.xforms.actions.DeleteAction.java Source code

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Here is the source code for com.bluexml.xforms.actions.DeleteAction.java

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/*
Copyright (C) 2007-2011  BlueXML - www.bluexml.com
    
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
    
*/

package com.bluexml.xforms.actions;

import java.util.Map;

import org.apache.commons.lang.StringUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

import com.bluexml.side.form.utils.DOMUtil;
import com.bluexml.xforms.controller.navigation.Page;
import com.bluexml.xforms.hook.actions.AbstractTransactionalAction;
import com.bluexml.xforms.messages.MsgId;
import com.bluexml.xforms.messages.MsgPool;

/**
 * The Class DeleteAction.<br>
 * Delete the edited instance
 */
public class DeleteAction extends AbstractTransactionalAction {

    private String elementId;

    /*
     * (non-Javadoc)
     * 
     * @see com.bluexml.xforms.actions.AbstractAction#getActionCaption()
     */
    @Override
    public String getActionCaption() {
        return MsgPool.getMsg(MsgId.CAPTION_BUTTON_DELETE);
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.bluexml.xforms.actions.AbstractAction#getActionName()
     */
    @Override
    public String getActionName() {
        return MsgId.INT_ACT_CODE_DELETE.getText();
    }

    @Override
    protected void prepareSubmit() {
        // delete element
        deleteNode();
    }

    @Override
    protected void afterSubmit() {
        // unstack last page
        Page currentPage = navigationPath.popCurrentPage();
        Map<String, String> initParams = currentPage.getInitParams();

        String url = StringUtils.trimToNull(initParams.get(MsgId.PARAM_NEXT_PAGE_DELETE.getText()));

        if (url == null) { // #1656
            // there may be something specified in the Xtension property of this form
            url = controller.getXtensionNextPageDelete(currentPage.getFormName(), currentPage.getFormType());
        }

        if (StringUtils.trimToNull(url) != null) {
            String nextPageUrl = buildRedirectionUrlWithParams(url, currentPage);
            super.redirectClient(nextPageUrl);
        } else {
            // previous page by default
            boolean empty = navigationPath.isEmpty();
            if (empty) {
                currentPage.setDataId(null);
                // forward to create if no page exists
                navigationPath.pushPage(currentPage);
            } else {
                // removes reference in current form
                if (elementId != null) {
                    controller.removeReference(navigationPath.peekCurrentPage().getNode(), elementId);

                }
            }
            setSubmissionDefaultLocation(getServletURL(), result);
        }
    }

    /**
     * Delete node.
     * 
     * @return the string
     */
    private void deleteNode() {
        elementId = DOMUtil.getNodeValueByTagName(node, MsgId.INT_INSTANCE_SIDEID.getText(), false);
        // #977: deletes fail to be performed in form's
        if (elementId == null) {
            Element root = ((Document) node).getDocumentElement();
            Element data = DOMUtil.getFirstElement(root);
            elementId = DOMUtil.getNodeValueByTagName(data, MsgId.INT_INSTANCE_SIDEID.getText(), false);
        }
        // #977
        // we should always have a valid Id here
        if (elementId != null) {
            controller.delete(transaction, elementId);
        } else {
            navigationPath.setStatusMsg("Delete was NOT performed: no object ID.");
        }
    }

}