001 //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/enterprise/control/ajax/JSONEvent.java $
002 /*---------------- FILE HEADER ------------------------------------------
003 This file is part of deegree.
004 Copyright (C) 2001-2008 by:
005 Department of Geography, University of Bonn
006 http://www.giub.uni-bonn.de/deegree/
007 lat/lon GmbH
008 http://www.lat-lon.de
009
010 This library is free software; you can redistribute it and/or
011 modify it under the terms of the GNU Lesser General Public
012 License as published by the Free Software Foundation; either
013 version 2.1 of the License, or (at your option) any later version.
014 This library 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 GNU
017 Lesser General Public License for more details.
018 You should have received a copy of the GNU Lesser General Public
019 License along with this library; if not, write to the Free Software
020 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
021 Contact:
022
023 Andreas Poth
024 lat/lon GmbH
025 Aennchenstr. 19
026 53177 Bonn
027 Germany
028 E-Mail: poth@lat-lon.de
029
030 Prof. Dr. Klaus Greve
031 Department of Geography
032 University of Bonn
033 Meckenheimer Allee 166
034 53115 Bonn
035 Germany
036 E-Mail: greve@giub.uni-bonn.de
037 ---------------------------------------------------------------------------*/
038
039 package org.deegree.enterprise.control.ajax;
040
041 import java.io.IOException;
042 import java.io.InputStreamReader;
043 import java.lang.reflect.Method;
044 import java.lang.reflect.Type;
045 import java.util.Map;
046
047 import javax.servlet.ServletContext;
048 import javax.servlet.ServletException;
049 import javax.servlet.http.HttpServletRequest;
050
051 import org.deegree.framework.log.ILogger;
052 import org.deegree.framework.log.LoggerFactory;
053 import org.deegree.framework.util.FileUtils;
054 import org.stringtree.json.JSONReader;
055
056 /**
057 *
058 *
059 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
060 * @author last edited by: $Author: jmays $
061 *
062 * @version. $Revision: 23820 $, $Date: 2010-04-26 08:17:25 +0200 (Mo, 26 Apr 2010) $
063 */
064 public class JSONEvent extends WebEvent {
065
066 private static final long serialVersionUID = 6459849162427895987L;
067
068 private static final ILogger LOG = LoggerFactory.getLogger( JSONEvent.class );
069
070 private Map<String, ?> json;
071
072
073
074 /**
075 *
076 * @param servletContext
077 * @param request
078 * @throws ServletException
079 */
080 @SuppressWarnings("unchecked")
081 JSONEvent( ServletContext servletContext, HttpServletRequest request ) throws ServletException {
082 super( servletContext, request, null );
083 JSONReader reader = new JSONReader();
084 String string = null;
085 try {
086 LOG.logDebug( "request character encoding: " + request.getCharacterEncoding() );
087
088 InputStreamReader isr = null;
089 if ( request.getCharacterEncoding() != null ) {
090 isr = new InputStreamReader( request.getInputStream(), request.getCharacterEncoding() );
091 } else {
092 // always use UTF-8 because XMLHttpRequest normally uses this encoding
093 isr = new InputStreamReader( request.getInputStream(), "UTF-8" );
094 }
095 string = FileUtils.readTextFile( isr ).toString();
096 } catch ( IOException e ) {
097 LOG.logError( e.getMessage(), e );
098 throw new ServletException( "can not parse json: " + json, e );
099 }
100 json = (Map<String, ?>) reader.read( string );
101 LOG.logDebug( "request parameter: " + json );
102 }
103
104 @SuppressWarnings("unchecked")
105 @Override
106 public Map getParameter() {
107 return json;
108 }
109
110 /**
111 *
112 * @param bean
113 */
114 void setBean( String bean ) {
115 this.bean = bean;
116 }
117
118 @Override
119 public Object getAsBean()
120 throws Exception {
121 Class<?> clzz = Class.forName( bean );
122 Object bean = clzz.newInstance();
123 Method[] methods = clzz.getMethods();
124 for ( Method method : methods ) {
125 if ( method.getName().startsWith( "set" ) ) {
126 String var = method.getName().substring( 4, method.getName().length() );
127 var = method.getName().substring( 3, 4 ).toLowerCase() + var;
128 Object val = json.get( var );
129 Type type = method.getGenericParameterTypes()[0];
130 if ( val != null ) {
131 method.invoke( bean, ((Class<?>)type).cast( val ) );
132 }
133 }
134 }
135 return bean;
136 }
137
138 }