Source Code Cross Referenced for BeanRepository.java in  » Web-Server » Rimfaxe-Web-Server » com » rimfaxe » webserver » compiler » jsp » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Server » Rimfaxe Web Server » com.rimfaxe.webserver.compiler.jsp 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * The Apache Software License, Version 1.1
003:         *
004:         * Copyright (c) 1999 The Apache Software Foundation.  All rights 
005:         * reserved.
006:         *
007:         * Redistribution and use in source and binary forms, with or without
008:         * modification, are permitted provided that the following conditions
009:         * are met:
010:         *
011:         * 1. Redistributions of source code must retain the above copyright
012:         *    notice, this list of conditions and the following disclaimer. 
013:         *
014:         * 2. Redistributions in binary form must reproduce the above copyright
015:         *    notice, this list of conditions and the following disclaimer in
016:         *    the documentation and/or other materials provided with the
017:         *    distribution.
018:         *
019:         * 3. The end-user documentation included with the redistribution, if
020:         *    any, must include the following acknowlegement:  
021:         *       "This product includes software developed by the 
022:         *        Apache Software Foundation (http://www.apache.org/)."
023:         *    Alternately, this acknowlegement may appear in the software itself,
024:         *    if and wherever such third-party acknowlegements normally appear.
025:         *
026:         * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
027:         *    Foundation" must not be used to endorse or promote products derived
028:         *    from this software without prior written permission. For written 
029:         *    permission, please contact apache@apache.org.
030:         *
031:         * 5. Products derived from this software may not be called "Apache"
032:         *    nor may "Apache" appear in their names without prior written
033:         *    permission of the Apache Group.
034:         *
035:         * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
036:         * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
037:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
038:         * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
039:         * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
040:         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
041:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
042:         * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
043:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
044:         * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
045:         * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
046:         * SUCH DAMAGE.
047:         * ====================================================================
048:         *
049:         * This software consists of voluntary contributions made by many
050:         * individuals on behalf of the Apache Software Foundation.  For more
051:         * information on the Apache Software Foundation, please see
052:         * <http://www.apache.org/>.
053:         *
054:         */
055:        package com.rimfaxe.webserver.compiler.jsp;
056:
057:        import java.util.Vector;
058:        import java.util.Enumeration;
059:        import java.util.Hashtable;
060:
061:        import java.beans.Beans;
062:        import java.beans.BeanInfo;
063:        import java.beans.PropertyDescriptor;
064:
065:        import javax.servlet.ServletException;
066:
067:        /**
068:         * Holds instances of {session, application, page}-scoped beans 
069:         *
070:         * @author Mandar Raje
071:         * @author Lars Andersen
072:         */
073:        public class BeanRepository {
074:
075:            Vector sessionBeans;
076:            Vector pageBeans;
077:            Vector appBeans;
078:            Vector requestBeans;
079:            Hashtable beanTypes;
080:            ClassLoader loader;
081:
082:            public BeanRepository() {
083:                sessionBeans = new Vector(11);
084:                pageBeans = new Vector(11);
085:                appBeans = new Vector(11);
086:                requestBeans = new Vector(11);
087:                beanTypes = new Hashtable();
088:                loader = ClassLoader.getSystemClassLoader();
089:            }
090:
091:            public boolean checkSessionBean(String s) {
092:                return sessionBeans.contains(s);
093:            }
094:
095:            public void addSessionBean(String s, String type)
096:                    throws JasperException {
097:                sessionBeans.addElement(s);
098:                putBeanType(s, type);
099:            }
100:
101:            public boolean hasSessionBeans() {
102:                return !sessionBeans.isEmpty();
103:            }
104:
105:            public Enumeration getSessionBeans() {
106:                return sessionBeans.elements();
107:            }
108:
109:            public boolean checkApplicationBean(String s) {
110:                return appBeans.contains(s);
111:            }
112:
113:            public void addApplicationBean(String s, String type)
114:                    throws JasperException {
115:                appBeans.addElement(s);
116:                putBeanType(s, type);
117:            }
118:
119:            public boolean hasApplicationBeans() {
120:                return !appBeans.isEmpty();
121:            }
122:
123:            public Enumeration getApplicationBeans() {
124:                return appBeans.elements();
125:            }
126:
127:            public boolean checkRequestBean(String s) {
128:                return requestBeans.contains(s);
129:            }
130:
131:            public void addRequestBean(String s, String type)
132:                    throws JasperException {
133:                requestBeans.addElement(s);
134:                putBeanType(s, type);
135:            }
136:
137:            public boolean hasRequestBeans() {
138:                return !requestBeans.isEmpty();
139:            }
140:
141:            public Enumeration getRequestBeans() {
142:                return requestBeans.elements();
143:            }
144:
145:            public boolean checkPageBean(String s) {
146:                return pageBeans.contains(s);
147:            }
148:
149:            public void addPageBean(String s, String type)
150:                    throws JasperException {
151:                pageBeans.addElement(s);
152:                putBeanType(s, type);
153:            }
154:
155:            public boolean hasPageBeans() {
156:                return !pageBeans.isEmpty();
157:            }
158:
159:            public Enumeration getPageBeans() {
160:                return pageBeans.elements();
161:            }
162:
163:            public boolean ClassFound(String clsname)
164:                    throws ClassNotFoundException {
165:                Class cls = null;
166:                //try {
167:                cls = loader.loadClass(clsname);
168:                //} catch (ClassNotFoundException ex) {
169:                //return false;
170:                //}
171:                return !(cls == null);
172:            }
173:
174:            public Class getBeanType(String bean) throws JasperException {
175:                Class cls = null;
176:                try {
177:                    //System.out.println("Try to load bean -> "+bean+"  in "+beanTypes.get(bean));
178:                    cls = loader.loadClass((String) beanTypes.get(bean));
179:                } catch (ClassNotFoundException ex) {
180:                    throw new JasperException(ex);
181:                }
182:                return cls;
183:            }
184:
185:            public void putBeanType(String bean, String type)
186:                    throws JasperException {
187:                try {
188:                    beanTypes.put(bean, type);
189:                } catch (Exception ex) {
190:                    throw new JasperException(ex);
191:                }
192:            }
193:
194:            //public void putBeanType (String bean, Class type) {
195:            //beanTypes.put (bean, type);
196:            //}
197:
198:            public void removeBeanType(String bean) {
199:                beanTypes.remove(bean);
200:            }
201:
202:            // Not sure if this is the correct way.
203:            // After pageContext is finalised this will change.
204:            public boolean checkVariable(String bean) {
205:                return (checkPageBean(bean) || checkSessionBean(bean)
206:                        || checkRequestBean(bean) || checkApplicationBean(bean));
207:            }
208:
209:            // Ideally this method should belong to the utils.
210:            public Class getClass(String clsname) throws ClassNotFoundException {
211:                Class cls = null;
212:                if (clsname != null) {
213:                    cls = loader.loadClass(clsname);
214:                }
215:                return cls;
216:            }
217:
218:            public boolean beanFound(String beanName)
219:                    throws ClassNotFoundException {
220:                try {
221:                    Beans.instantiate(Thread.currentThread()
222:                            .getContextClassLoader(), beanName);
223:                    return true;
224:                } catch (java.io.IOException ex) {
225:                    // Ignore it for the time being.
226:                    return false;
227:                }
228:            }
229:        }
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