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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