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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
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*
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* 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_1_1.html
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*
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* file and include the License file at packager/legal/LICENSE.txt.
*
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* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
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package com.sun.xml.bind.v2.runtime.reflect.opt;
import java.io.InputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.xml.bind.Util;
import com.sun.xml.bind.v2.bytecode.ClassTailor;
/**
* @author Kohsuke Kawaguchi
*/
class AccessorInjector {
private static final Logger logger = Util.getClassLogger();
protected static final boolean noOptimize =
Util.getSystemProperty(ClassTailor.class.getName()+".noOptimize")!=null;
static {
if(noOptimize)
logger.info("The optimized code generation is disabled");
}
/**
* Loads the optimized class and returns it.
*
* @return null
* if it fails for some reason.
*/
public static Class prepare(
Class beanClass, String templateClassName, String newClassName, String... replacements ) {
if(noOptimize)
return null;
try {
ClassLoader cl = SecureLoader.getClassClassLoader(beanClass);
if(cl==null) return null; // how do I inject classes to this "null" class loader? for now, back off.
Class c = Injector.find(cl,newClassName);
if (c==null) {
byte[] image = tailor(templateClassName,newClassName,replacements);
if (image==null) {
return null;
}
c = Injector.inject(cl,newClassName,image);
if (c == null) {
Injector.find(cl, newClassName);
}
}
return c;
} catch(SecurityException e) {
// we don't have enough permission to do this
logger.log(Level.INFO,"Unable to create an optimized TransducedAccessor ",e);
return null;
}
}
/**
* Customizes a class file by replacing constant pools.
*
* @param templateClassName
* The resource that contains the template class file.
* @param replacements
* A list of pair of strings that specify the substitution
* {@code String[]{search_0, replace_0, search_1, replace_1, ..., search_n, replace_n }
*
* The search strings found in the constant pool will be replaced by the corresponding
* replacement string.
*/
private static byte[] tailor( String templateClassName, String newClassName, String... replacements ) {
InputStream resource;
if(CLASS_LOADER!=null)
resource = CLASS_LOADER.getResourceAsStream(templateClassName+".class");
else
resource = ClassLoader.getSystemResourceAsStream(templateClassName+".class");
if(resource==null)
return null;
return ClassTailor.tailor(resource,templateClassName,newClassName,replacements);
}
private static final ClassLoader CLASS_LOADER = SecureLoader.getClassClassLoader(AccessorInjector.class);
}
