001: package com.quadcap.http.servlets.jsp;
002:
003: /* Copyright 1999 - 2003 Quadcap Software. All rights reserved.
004: *
005: * This software is distributed under the Quadcap Free Software License.
006: * This software may be used or modified for any purpose, personal or
007: * commercial. Open Source redistributions are permitted. Commercial
008: * redistribution of larger works derived from, or works which bundle
009: * this software requires a "Commercial Redistribution License"; see
010: * http://www.quadcap.com/purchase.
011: *
012: * Redistributions qualify as "Open Source" under one of the following terms:
013: *
014: * Redistributions are made at no charge beyond the reasonable cost of
015: * materials and delivery.
016: *
017: * Redistributions are accompanied by a copy of the Source Code or by an
018: * irrevocable offer to provide a copy of the Source Code for up to three
019: * years at the cost of materials and delivery. Such redistributions
020: * must allow further use, modification, and redistribution of the Source
021: * Code under substantially the same terms as this license.
022: *
023: * Redistributions of source code must retain the copyright notices as they
024: * appear in each source code file, these license terms, and the
025: * disclaimer/limitation of liability set forth as paragraph 6 below.
026: *
027: * Redistributions in binary form must reproduce this Copyright Notice,
028: * these license terms, and the disclaimer/limitation of liability set
029: * forth as paragraph 6 below, in the documentation and/or other materials
030: * provided with the distribution.
031: *
032: * The Software is provided on an "AS IS" basis. No warranty is
033: * provided that the Software is free of defects, or fit for a
034: * particular purpose.
035: *
036: * Limitation of Liability. Quadcap Software shall not be liable
037: * for any damages suffered by the Licensee or any third party resulting
038: * from use of the Software.
039: */
040:
041: import java.util.Hashtable;
042:
043: import java.io.File;
044: import java.io.FileInputStream;
045: import java.io.IOException;
046:
047: import com.quadcap.util.Debug;
048:
049: /**
050: * This class implements a JSP class loader
051: *
052: * @author Stan Bailes
053: */
054: public class JspClassLoader extends ClassLoader {
055: File root;
056:
057: public JspClassLoader(ClassLoader parent, File root) {
058: super (parent);
059: this .root = root;
060: }
061:
062: public Class loadClass(String name) throws ClassNotFoundException {
063: return loadClass(name, true);
064: }
065:
066: //- //#ifdef JDK11
067: //- Hashtable cache = new Hashtable();
068: //-
069: //- public Class loadClass(String name, boolean resolve)
070: //- throws ClassNotFoundException
071: //- {
072: //- Class c = (Class)cache.get(name);
073: //- if (c == null) {
074: //- c = findClass(name);
075: //- cache.put(name, c);
076: //- }
077: //- if (resolve)
078: //- resolveClass(c);
079: //- return c;
080: //- }
081: //-
082: //#endif
083:
084: public Class findClass(String name) throws ClassNotFoundException {
085: //#ifdef DEBUG
086: if (Trace.level() > 1) {
087: Debug.println("JspClassLoader.findClass(" + name + ")");
088: }
089: //#endif
090: byte[] b = loadClassData(name);
091: return defineClass(name, b, 0, b.length);
092: }
093:
094: private byte[] loadClassData(String name)
095: throws ClassNotFoundException {
096: try {
097: String fileName = name.replace('.', File.separatorChar);
098: File classFile = new File(root, fileName + ".class");
099: int len = (int) (classFile.length());
100: byte[] b = new byte[len];
101: FileInputStream f = new FileInputStream(classFile);
102: f.read(b);
103: f.close();
104: return b;
105: } catch (IOException e) {
106: throw new ClassNotFoundException("error loading class: "
107: + e.toString());
108: }
109: }
110:
111: }
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