/**
 * Copyright (C) 2010-2017 Gordon Fraser, Andrea Arcuri and EvoSuite
 * contributors
 *
 * This file is part of EvoSuite.
 *
 * EvoSuite 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 3.0 of the License, or
 * (at your option) any later version.
 *
 * EvoSuite 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 Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
 */
package org.evosuite.testcarver.instrument;

import org.evosuite.PackageInfo;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.tree.ClassNode;

public class TransformerUtil {
	
	public static int modifyVisibility(int access, final int targetAccess)
	{
		access &= ~ Opcodes.ACC_PRIVATE;
		access &= ~ Opcodes.ACC_PROTECTED;
		access &= ~ Opcodes.ACC_PUBLIC;
		
		return access |= targetAccess; 
	}
	
	public static boolean isStatic(final int access)
	{
		return (access & Opcodes.ACC_STATIC) != 0;
	}
	
	public static boolean isPrivate(final int access)
	{
		return (access & Opcodes.ACC_PRIVATE) != 0;
	}
	
	public static boolean isPublic(final int access)
	{
		return (access & Opcodes.ACC_PUBLIC) != 0;
	}
	
	public static boolean isProtected(final int access)
	{
		return (access & Opcodes.ACC_PROTECTED) != 0;
	}
	
	public static boolean isAbstract(final int access)
	{
		return (access & Opcodes.ACC_ABSTRACT) != 0;
	}
	
	public static boolean isNative(final int access)
	{
		return (access & Opcodes.ACC_NATIVE) != 0;
	}
	
	
	public static boolean isClassConsideredForInstrumentation(final String className)
	{
		// we exclude standard java and sun packages as well the Prototype package
		// TODO use regex for check
		// TODO use configuration for exclusion
		
		
		  return! (
				   className.startsWith("sun") ||
				   className.startsWith("com/sun") ||
				   className.startsWith("java") ||
				   className.startsWith("java/lang") ||
				   className.startsWith("$Proxy") || // ignore all dynamic proxies (http://docs.oracle.com/javase/1.3/docs/guide/reflection/proxy.html)
				   className.startsWith(PackageInfo.getEvoSuitePackageWithSlash()+"/testcarver")
				   );
	}
	
	
	public static boolean isDependency(final String className)
	{
		// TODO use regex for check
		// TODO use configuration for exclusion
		  return (
				  	className.startsWith("sun") ||
				   className.startsWith("com/sun") ||
				   className.startsWith("java") ||
				   className.startsWith("com/thoughtworks/xstream") ||
				   className.startsWith("org/xmlpull") ||
//				   className.startsWith("gnu/trove") ||
				   className.startsWith("org/eclipse/jdt") ||
				   className.startsWith("org/slf4j"));
	}	

	
	
	public static boolean isClassAccessible(final ClassNode cn)
	{
		
		return (cn.access & Opcodes.ACC_INTERFACE) == 0 &&
			(
					( (cn.access & Opcodes.ACC_PUBLIC)    != 0) || 
					( (cn.access & Opcodes.ACC_PROTECTED) != 0)
			);
	}
}