001 /* 002 * Copyright © 2008, 2009 Pedro Agulló Soliveres. 003 * 004 * This file is part of DirectJNgine. 005 * 006 * DirectJNgine is free software: you can redistribute it and/or modify 007 * it under the terms of the GNU Lesser General Public License as published by 008 * the Free Software Foundation, either version 3 of the License. 009 * 010 * Commercial use is permitted to the extent that the code/component(s) 011 * do NOT become part of another Open Source or Commercially developed 012 * licensed development library or toolkit without explicit permission. 013 * 014 * DirectJNgine is distributed in the hope that it will be useful, 015 * but WITHOUT ANY WARRANTY; without even the implied warranty of 016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 017 * GNU Lesser General Public License for more details. 018 * 019 * You should have received a copy of the GNU Lesser General Public License 020 * along with DirectJNgine. If not, see <http://www.gnu.org/licenses/>. 021 * 022 * This software uses the ExtJs library (http://extjs.com), which is 023 * distributed under the GPL v3 license (see http://extjs.com/license). 024 */ 025 026 package com.softwarementors.extjs.djn.gson; 027 028 import com.google.gson.JsonParseException; 029 import com.softwarementors.extjs.djn.DirectJNgineException; 030 import com.softwarementors.extjs.djn.StringUtils; 031 import com.softwarementors.extjs.djn.api.RegisteredStandardMethod; 032 import com.softwarementors.extjs.djn.router.processor.ResponseData; 033 034 public class JsonException extends DirectJNgineException { 035 private static final long serialVersionUID = 4992911540391211769L; 036 037 private JsonException( String message, Throwable cause ) { 038 super(message, cause); 039 040 assert !StringUtils.isEmpty(message); 041 assert cause != null; 042 } 043 044 public static JsonException forFailedConversionFromResponseToJson(ResponseData response, Throwable ex) { 045 assert response != null; 046 assert ex != null; 047 048 return new JsonException( "Failed attempt to convert a response to json. " + response.getFullLogDescription(), ex ); 049 } 050 051 public static JsonException forFailedConversionFromJsonStringToMethodParameters(RegisteredStandardMethod method, String jsonParametersString, 052 Class<?>[] parameterTypes, JsonParseException ex) 053 { 054 assert method != null; 055 assert jsonParametersString != null; 056 assert parameterTypes != null; 057 assert ex != null; 058 059 StringBuilder typeNames = getCommaSeparatedTypeNames(parameterTypes); 060 return new JsonException( "Failed attempt to convert from a json string to java method parameters. Method='" + method.getFullName() + "', Json string='" + 061 jsonParametersString + "', ExpectedTypes='" + typeNames + "'", ex ); 062 } 063 064 private static StringBuilder getCommaSeparatedTypeNames(Class<?>[] parameterTypes) 065 { 066 StringBuilder typeNames = new StringBuilder(); 067 for( int i = 0; i < parameterTypes.length -1; i++ ) { 068 Class<?> type = parameterTypes[i]; 069 typeNames.append( type.getName() + ", "); 070 } 071 if( parameterTypes.length > 0 ) { 072 typeNames.append( parameterTypes[parameterTypes.length-1].getName()); 073 } 074 return typeNames; 075 } 076 }