org.snt.inmemantlr.comp.SpecialClassLoader Maven / Gradle / Ivy
/**
* Inmemantlr - In memory compiler for Antlr 4
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Julian Thome
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
**/
package org.snt.inmemantlr.comp;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.snt.inmemantlr.memobjects.MemoryByteCode;
import java.util.HashMap;
import java.util.Map;
/**
* extended class loader
*/
class SpecialClassLoader extends ClassLoader {
private static final Logger LOGGER = LoggerFactory.getLogger(SpecialClassLoader.class);
private Map m = new HashMap<>();
public SpecialClassLoader(ClassLoader parent) {
super(parent);
}
/**
* find a class that is already loaded
*
* @param name class name
* @return the actual class
* @throws ClassNotFoundException if the class could not be found
*/
protected Class findClass(String name) throws ClassNotFoundException {
MemoryByteCode mbc = m.get(name);
if (mbc == null) {
mbc = m.get(name.replace(".", "/"));
if (mbc == null) {
LOGGER.error("Could not find {}", name);
return super.findClass(name);
}
}
byte[] bseq = mbc.getBytes();
return defineClass(name, bseq, 0, bseq.length);
}
/**
* add class to class loader
*
* @param mbc representation
*/
public void addClass(MemoryByteCode mbc) {
m.put(mbc.getClassName(), mbc);
}
}