001/** 002 * Copyright 2015 DuraSpace, Inc. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.fcrepo.http.commons.exceptionhandlers; 017 018import static javax.ws.rs.core.Response.status; 019import static javax.ws.rs.core.Response.Status.BAD_REQUEST; 020import static org.slf4j.LoggerFactory.getLogger; 021 022import java.util.regex.Matcher; 023import java.util.regex.Pattern; 024 025import javax.ws.rs.core.Response; 026import javax.ws.rs.ext.ExceptionMapper; 027import javax.ws.rs.ext.Provider; 028 029import org.slf4j.Logger; 030 031import com.hp.hpl.jena.query.QueryParseException; 032 033 034/** 035 * Handles Sparql query parsing exceptions thrown when querying or updating. 036 * 037 * @author whikloj 038 * @since September 9, 2014 039 */ 040@Provider 041public class QueryParseExceptionMapper implements 042ExceptionMapper<QueryParseException> { 043 044 private static final Logger LOGGER = getLogger(QueryParseExceptionMapper.class); 045 046 @Override 047 public Response toResponse(final QueryParseException e) { 048 049 LOGGER.debug("Captured a query parse exception {}", e.getMessage()); 050 if (e.getMessage().matches(".* Unresolved prefixed name: .*")) { 051 final Pattern namespacePattern = 052 Pattern.compile("Unresolved prefixed name: (\\w+:\\w+)"); 053 final Matcher namespaceMatch = 054 namespacePattern.matcher(e.getMessage()); 055 if (namespaceMatch.find()) { 056 final String msg = 057 String.format( 058 "There are one or more undefined namespace(s) in your request [ %s ], " + 059 "please define them before retrying", 060 namespaceMatch.group(1)); 061 return status(BAD_REQUEST).entity(msg).build(); 062 } 063 } 064 065 return status(BAD_REQUEST).entity(e.getMessage()).build(); 066 } 067 068}