001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/enterprise/control/RPCWebEvent.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2008 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstr. 19
030 53115 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042
043 ---------------------------------------------------------------------------*/
044 package org.deegree.enterprise.control;
045
046 import java.io.BufferedReader;
047 import java.io.StringReader;
048
049 import javax.servlet.ServletRequest;
050 import javax.servlet.http.HttpServletRequest;
051
052 /**
053 * @author Administrator
054 */
055
056 public class RPCWebEvent extends WebEvent {
057
058 /**
059 *
060 */
061 private static final long serialVersionUID = 1L;
062 /**
063 *
064 */
065 private RPCMethodCall mc = null;
066
067
068 /** Creates a new instance of RPCWebEvent */
069 public RPCWebEvent(HttpServletRequest request) {
070 super( request );
071 }
072
073 /** Creates a new instance of RPCWebEvent */
074 public RPCWebEvent(HttpServletRequest request, RPCMethodCall mc) {
075 super( request );
076 this.mc = mc;
077 }
078
079 /** Creates a new instance of RPCWebEvent */
080 public RPCWebEvent(FormEvent parent, RPCMethodCall mc) {
081 super( (HttpServletRequest)parent.getSource() );
082 this.mc = mc;
083 }
084
085 /**
086 * returns the the RPC methodcall extracted from the <tt>HttpServletRequest</tt>
087 * passed to the first constructor.
088 */
089 public RPCMethodCall getRPCMethodCall() {
090 if ( mc == null ) {
091 try {
092 mc = getMethodCall( (ServletRequest)this.getSource() );
093 } catch (Exception e) {
094 e.printStackTrace();
095 }
096 }
097 return mc;
098 }
099
100 /**
101 * extracts the RPC method call from the
102 * @param request
103 * @throws RPCException
104 */
105 private RPCMethodCall getMethodCall(ServletRequest request ) throws RPCException {
106
107 StringBuffer sb = new StringBuffer(1000);
108 try {
109 BufferedReader br = request.getReader();
110 String line = null;
111 while ( (line = br.readLine() ) != null ) {
112 sb.append( line );
113 }
114 br.close();
115 } catch (Exception e) {
116 throw new RPCException( "Error reading stream from servlet\n" + e.toString() );
117 }
118
119 String s = sb.toString();
120 int pos1 = s.indexOf( "<methodCall>" );
121 int pos2 = s.indexOf( "</methodCall>" );
122 if ( pos1 < 0 ) {
123 throw new RPCException( "request doesn't contain a RPC methodCall" );
124 }
125 s = s.substring( pos1, pos2 + 13 );
126
127 StringReader reader = new StringReader( s );
128 RPCMethodCall mc = RPCFactory.createRPCMethodCall( reader );
129
130 return mc;
131 }
132 }