org.sonar.java.bytecode.asm.AsmClassProviderImpl Maven / Gradle / Ivy
/*
* SonarQube Java
* Copyright (C) 2012 SonarSource
* [email protected]
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02
*/
package org.sonar.java.bytecode.asm;
import org.apache.commons.io.IOUtils;
import org.objectweb.asm.ClassReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
public class AsmClassProviderImpl extends AsmClassProvider {
private static final Logger LOG = LoggerFactory.getLogger(AsmClassProviderImpl.class);
private final ClassLoader classLoader;
private final Map asmClassCache = new HashMap<>();
public AsmClassProviderImpl() {
this.classLoader = Thread.currentThread().getContextClassLoader();
}
public AsmClassProviderImpl(ClassLoader classLoader) {
this.classLoader = classLoader;
}
@Override
public AsmClass getClass(String internalName, DETAIL_LEVEL level) {
if (internalName == null) {
// TODO Godin: I believe that we should throw IllegalArgumentException instead
throw new IllegalStateException("You can try to load a class whose internalName = 'null'");
}
AsmClass asmClass = getAsmClassFromCacheOrCreateIt(internalName);
if (level.isGreaterThan(asmClass.getDetailLevel())) {
decoracteAsmClassFromBytecode(asmClass, level);
}
return asmClass;
}
private AsmClass getAsmClassFromCacheOrCreateIt(String internalName) {
AsmClass asmClass = asmClassCache.get(internalName);
if (asmClass == null) {
asmClass = new AsmClass(internalName, DETAIL_LEVEL.NOTHING);
asmClassCache.put(internalName, asmClass);
}
return asmClass;
}
private void decoracteAsmClassFromBytecode(AsmClass asmClass, DETAIL_LEVEL level) {
InputStream input = null;
try {
AsmClassVisitor classVisitor = new AsmClassVisitor(this, asmClass, level);
input = classLoader.getResourceAsStream(asmClass.getInternalName() + ".class");
ClassReader asmReader = new ClassReader(input);
asmReader.accept(classVisitor, 0);
} catch (IOException e) {
LOG.warn("Class '" + asmClass.getInternalName() + "' is not accessible through the ClassLoader.");
} catch (SecurityException e) {
LOG.warn("Class '" + asmClass.getInternalName() + "' is not accessible through the ClassLoader. One signed jar seems to be corrupted.");
} catch (Exception e) {
LOG.error("Unable to process bytecode of class '" + asmClass.getInternalName() + "'", e);
} finally {
IOUtils.closeQuietly(input);
}
}
}