com.sun.appserv.server.util.PreprocessorUtil Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jsp-2.1-glassfish Show documentation
Show all versions of jsp-2.1-glassfish Show documentation
JSP2.1 Jasper implementation from Glassfish
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.appserv.server.util;
import java.util.Hashtable;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.appserv.BytecodePreprocessor;
import com.sun.common.util.logging.LogDomains;
/**
* PreprocessorUtil is a utility class for managing the bytecode
* preprocessor(s). The list of preprocessors are passed in as a string array
* to the initialize method. If there is a problem initialize any of the
* preprocessors, all preprocessing is disabled.
*/
public class PreprocessorUtil {
private static boolean _preprocessorEnabled = false;
private static BytecodePreprocessor[] _preprocessor;
/**
* Initializes the preprocessor utility with the associated class names
* array arugment.
* @param ppClassNames - the String array of preprocessor class names.
* @return - true if successful, otherwise false. All preprocessors must
* successfully initialize for true to be returned.
*/
public static boolean init (String[] ppClassNames) {
if (ppClassNames != null) {
setupPreprocessor(ppClassNames);
}
return _preprocessorEnabled;
}
/**
* Processes a class through the preprocessor.
* @param className - the class name.
* @param classBytes - the class byte array.
* @return - the processed class byte array.
*/
public static byte[] processClass (String className, byte[] classBytes) {
Logger _logger = LogDomains.getLogger(LogDomains.CMN_LOGGER);
byte[] goodBytes = classBytes;
if (_preprocessorEnabled) {
if (_preprocessor != null) {
// Loop through all of the defined preprocessors...
for (int i=0; i < _preprocessor.length; i++) {
classBytes =
_preprocessor[i].preprocess(className, classBytes);
_logger.fine("[PreprocessorUtil.processClass] Preprocessor "
+ i + " Processed Class: " + className);
// Verify the preprocessor returned some bytes
if (classBytes != null){
goodBytes = classBytes;
}
else{
_logger.log(Level.SEVERE,
"bytecodepreprocessor.preprocess_failed",
new String[] {className,
_preprocessor[i].getClass().getName()});
// If were on the 1st preprocessor
if (i == 0){
_logger.log(
Level.SEVERE,
"bytecodepreprocessor.resetting_original",
className);
}
// We're on the 2nd or nth preprocessor.
else{
_logger.log(
Level.SEVERE,
"bytecodepreprocessor.resetting_last_good",
className);
}
}
}
}
}
return goodBytes;
}
private synchronized static void setupPreprocessor(String[] ppClassNames) {
Logger _logger = LogDomains.getLogger(LogDomains.CMN_LOGGER);
if (_preprocessor != null)
// The preprocessors have already been set up.
return;
try {
_preprocessor = new BytecodePreprocessor[ppClassNames.length];
for (int i = 0; i < ppClassNames.length; i++) {
String ppClassName = ppClassNames[i].trim();
Class ppClass = Class.forName(ppClassName);
if (ppClass != null){
_preprocessor[i] = (BytecodePreprocessor)
ppClass.newInstance();
if (_preprocessor[i] instanceof BytecodePreprocessor){
_preprocessor[i] =
(BytecodePreprocessor)_preprocessor[i];
_preprocessorEnabled = true;
} else {
_logger.log(Level.SEVERE,
"bytecodepreprocessor.invalid_type",
ppClassName);
_logger.log(Level.SEVERE,
"bytecodepreprocessor.disabled");
_preprocessorEnabled = false;
}
}
if (_preprocessor[i] != null){
if (!_preprocessor[i].initialize(new Hashtable())) {
_logger.log(Level.SEVERE,
"bytecodepreprocessor.failed_init",
ppClassName);
_logger.log(Level.SEVERE,
"bytecodepreprocessor.disabled");
_preprocessorEnabled = false;
}
} else {
_logger.log(Level.SEVERE,
"bytecodepreprocessor.failed_init",
ppClassName);
_logger.log(Level.SEVERE,
"bytecodepreprocessor.disabled");
_preprocessorEnabled = false;
}
}
} catch (Throwable t) {
_logger.log(Level.SEVERE, "bytecodepreprocessor.setup_ex", t);
_logger.log(Level.SEVERE, "bytecodepreprocessor.disabled");
_preprocessorEnabled = false;
return;
}
}
/**
* Indicates whether or not the preprocessor is enabled
* @return - true of the preprocessor is enabled, otherwise false.
*/
public static boolean isPreprocessorEnabled() {
return _preprocessorEnabled;
}
}