Java tutorial
/* * ==================================================================== * This file is part of the ebXML Registry by Icar Cnr v3.2 * ("eRICv32" in the following disclaimer). * * "eRICv32" 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. * * "eRICv32" 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 Version 3 * along with "eRICv32". If not, see <http://www.gnu.org/licenses/>. * * eRICv32 is a forked, derivative work, based on: * - freebXML Registry, a royalty-free, open source implementation of the ebXML Registry standard, * which was published under the "freebxml License, Version 1.1"; * - ebXML OMAR v3.2 Edition, published under the GNU GPL v3 by S. Krushe & P. Arwanitis. * * All derivative software changes and additions are made under * * Copyright (C) 2013 Ing. Antonio Messina <messina@pa.icar.cnr.it> * * This software consists of voluntary contributions made by many * individuals on behalf of the freebxml Software Foundation. For more * information on the freebxml Software Foundation, please see * "http://www.freebxml.org/". * * This product includes software developed by the Apache Software * Foundation (http://www.apache.org/). * * ==================================================================== */ package it.cnr.icar.eric.server.interfaces.rest; import it.cnr.icar.eric.common.BindingUtility; import it.cnr.icar.eric.common.exceptions.ObjectNotFoundException; import it.cnr.icar.eric.common.exceptions.UnimplementedException; import it.cnr.icar.eric.server.util.ServerResourceBundle; import java.io.IOException; import java.util.List; import java.util.Locale; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.xml.registry.InvalidRequestException; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import javax.xml.registry.RegistryException; import org.oasis.ebxml.registry.bindings.rim.ExtrinsicObjectType; import org.oasis.ebxml.registry.bindings.rim.RegistryObjectType; /** * * @author Uday Subbarayan(mailto:uday.s@sun.com) * @version */ public class UserDefinedURLHandler extends URLHandler { @SuppressWarnings("unused") private Log log = LogFactory.getLog(this.getClass()); @SuppressWarnings("unused") private BindingUtility bu = BindingUtility.getInstance(); protected UserDefinedURLHandler() { } UserDefinedURLHandler(HttpServletRequest request, HttpServletResponse response) throws RegistryException { super(request, response); } /** * Processes a Get Request */ void processGetRequest() throws IOException, RegistryException, InvalidRequestException, UnimplementedException, ObjectNotFoundException { try { //First see if URL matches a repositoryItem getRepositoryItemByURI(); } catch (ObjectNotFoundException e) { //No match on repository item so see if it matches a RegistryObject getRegistryObjectByURI(); } } /** * Attempt to get a RepositoryItem by its URI. * */ private List<?> getRepositoryItemByURI() throws IOException, RegistryException, ObjectNotFoundException { List<?> results = null; String pathInfo = request.getPathInfo(); //If path begins with a '/' then we also need to check for same patch but without leading '/' //because zip files with relative entry paths when cataloged do not have the leading '/' String pathInfo2 = new String(pathInfo); if (pathInfo2.charAt(0) == '/') { pathInfo2 = pathInfo2.substring(1); } try { ExtrinsicObjectType ro = null; String queryString = "SELECT eo.* FROM ExtrinsicObject eo, Slot s " + "WHERE (s.value='" + pathInfo + "' OR s.value='" + pathInfo2 + "') AND " + "s.name_='" + BindingUtility.CANONICAL_SLOT_CONTENT_LOCATOR + "' AND s.parent=eo.id"; results = submitQueryAs(queryString, currentUser); if (results.size() == 0) { throw new ObjectNotFoundException(ServerResourceBundle.getInstance() .getString("message.noRepositoryItemFound", new Object[] { pathInfo })); } else if (results.size() == 1) { ro = (ExtrinsicObjectType) results.get(0); writeRepositoryItem(ro); } else { throw new RegistryException(ServerResourceBundle.getInstance() .getString("message.duplicateRegistryObjects", new Object[] { pathInfo })); } } catch (NullPointerException e) { e.printStackTrace(); throw new RegistryException( it.cnr.icar.eric.server.common.Utility.getInstance().getStackTraceFromThrowable(e)); } return results; } /** * Attempt to get a RegistryObject by its URI. * */ private List<?> getRegistryObjectByURI() throws IOException, RegistryException, ObjectNotFoundException { List<?> results = null; @SuppressWarnings("unused") Locale locale = request.getLocale(); String pathInfo = request.getPathInfo(); try { RegistryObjectType ro = null; String queryString = "SELECT ro.* FROM RegistryObject ro, Slot s " + "WHERE s.value='" + pathInfo + "' AND " + "s.name_='" + BindingUtility.CANONICAL_SLOT_LOCATOR + "' AND s.parent=ro.id"; results = submitQueryAs(queryString, currentUser); if (results.size() == 0) { throw new ObjectNotFoundException(ServerResourceBundle.getInstance() .getString("message.noRegistryObjectFound", new Object[] { pathInfo })); } else if (results.size() == 1) { ro = (RegistryObjectType) results.get(0); writeRegistryObject(ro); } else { throw new RegistryException(ServerResourceBundle.getInstance() .getString("message.duplicateRegistryObjects", new Object[] { pathInfo })); } } catch (NullPointerException e) { e.printStackTrace(); throw new RegistryException( it.cnr.icar.eric.server.common.Utility.getInstance().getStackTraceFromThrowable(e)); } if ((results == null) || (results.size() == 0)) { throw new ObjectNotFoundException(ServerResourceBundle.getInstance() .getString("message.noRegistryObjectFound", new Object[] { pathInfo })); } return results; } }