gov.nih.nci.system.web.struts.action.DeleteAction.java Source code

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Here is the source code for gov.nih.nci.system.web.struts.action.DeleteAction.java

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/*L
 *  Copyright Ekagra Software Technologies Ltd.
 *  Copyright SAIC, SAIC-Frederick
 *
 *  Distributed under the OSI-approved BSD 3-Clause License.
 *  See http://ncip.github.com/cacore-sdk/LICENSE.txt for details.
 */

package gov.nih.nci.system.web.struts.action;

import java.io.InputStream;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;

import org.apache.cxf.jaxrs.client.WebClient;
import org.apache.log4j.Logger;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.dispatcher.SessionMap;
import org.acegisecurity.Authentication;
import javax.ws.rs.core.Response.Status;
import com.opensymphony.xwork2.ActionContext;
import org.apache.commons.codec.binary.Base64;
import org.jdom.Element;

/**
 * Delete Action using RESTful Delete Implementation
 * Given Resource URL is used to determine the resource and its Id
 * Upon confirmation, proceed to delete
 * Upon delete, display message by hiding delete buttons section
 * @author konkapv
 *
 */
public class DeleteAction extends RestQuery {

    private static final long serialVersionUID = 1234567890L;

    private static Logger log = Logger.getLogger(Result.class.getName());

    public String execute() throws Exception {
        init();
        HttpServletRequest request = ServletActionContext.getRequest();
        String targetClass = request.getParameter("target");
        if (targetClass == null || targetClass.trim().length() == 0) {
            request.setAttribute("Message", "Invalid target");
            return null;
        }

        String idCol = null;

        try {
            idCol = classCache.getClassIdName(Class.forName(targetClass));
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        if (idCol == null) {
            request.setAttribute("Message", "Invalid target");
            return null;
        }

        String idColValue = request.getParameter(idCol);
        if (idColValue == null || idColValue.trim().length() == 0) {
            request.setAttribute("Message", "Invalid target identifier");
            return null;
        }

        String confirm = request.getParameter("confirm");
        if (confirm == null || confirm.trim().length() == 0 || !confirm.equals("true"))
            return SUCCESS;

        String url = request.getRequestURL().toString();
        String restURL = url.substring(0, url.lastIndexOf("/"));
        WebClient client = WebClient.create(restURL);
        client.path("rest/" + targetClass.substring(targetClass.lastIndexOf(".") + 1, targetClass.length()) + "/"
                + idColValue);
        client.type("application/xml").accept("application/xml");
        SessionMap session = (SessionMap) ActionContext.getContext().get(ActionContext.SESSION.toString());
        org.acegisecurity.context.SecurityContext context = (org.acegisecurity.context.SecurityContext) session
                .get("ACEGI_SECURITY_CONTEXT");
        if (context != null) {
            Authentication authentication = context.getAuthentication();
            // authentication.getCredentials();
            String userName = ((org.acegisecurity.userdetails.User) authentication.getPrincipal()).getUsername();
            String password = authentication.getCredentials().toString();
            String base64encodedUsernameAndPassword = new String(
                    Base64.encodeBase64((userName + ":" + password).getBytes()));
            client.header("Authorization", "Basic " + base64encodedUsernameAndPassword);
        } else {
            if (secured) {
                request.setAttribute("message", "Invalid authentication");
                return SUCCESS;
            }

        }

        Response r = client.delete();

        if (r.getStatus() == Status.OK.getStatusCode()) {
            request.removeAttribute("confirm");
            request.setAttribute("successful", "1");
            // request.removeAttribute("confirm");

            InputStream is = (InputStream) r.getEntity();

            org.jdom.input.SAXBuilder builder = new org.jdom.input.SAXBuilder(false);
            org.jdom.Document jDoc = builder.build(is);
            Element root = jDoc.getRootElement();
            Element messageEle = root.getChild("message");
            request.setAttribute("message",
                    org.apache.commons.lang.StringEscapeUtils.escapeHtml(messageEle.getText()));
        } else {
            InputStream is = (InputStream) r.getEntity();

            org.jdom.input.SAXBuilder builder = new org.jdom.input.SAXBuilder(false);
            org.jdom.Document jDoc = builder.build(is);
            Element root = jDoc.getRootElement();
            Element message = root.getChild("message");
            String error = root.getText();
            if (message != null)
                error = message.getText();

            String messageStr = "Failed to create: " + error;
            request.setAttribute("message", org.apache.commons.lang.StringEscapeUtils.escapeHtml(messageStr));
        }
        return SUCCESS;
    }
}