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/**
* [ÖØдµÄÀà¼ÓÔØÆ÷]
* ɳÏä³ÌÐòÀà¼ÓÔØÆ÷,¿É¸ù¾ÝÖ¸¶¨Â·¾¶¼ÓÔØÖƶ¨ÀàclassÎļþ.
*
* [˵Ã÷]
* ½ö°üÄڿɼû
*
* @author Áõ½ðöÎ
* @version 1.0
* */
package org.hljoj.core.judge.sandbox;
import java.io.File;
import java.io.FileInputStream;
import org.hljoj.core.judge.util.ConstantParam;
class SandboxClassLoader extends ClassLoader{
/**ĬÈÏclassPath*/
private String _classPath;

/**
* ¹¹Ô캯Êý
* @param classPath Àà¼ÓÔØÆ÷ĬÈÏclassPath
* */
public SandboxClassLoader(String classPath) {
this._classPath = classPath;
}
@Override
protected Class<?> findClass(String className) throws ClassNotFoundException {
return loadClass(_classPath, className);
}

/**
* ¸ü¸ÄÀà¼ÓÔØÆ÷¼ÓÔØÀàµÄclasspath,ÔÚÖƶ¨Â·¾¶Ï¼ÓÔØÖƶ¨µÄÀàclassÎļþ
* @param classPath Òª¼ÓÔصÄÀà·¾¶
* @param className Òª¼ÓÔصÄÀàÃû
* ×îΪÏÞ¶¨,Ö»ÄܼÓÔز»º¬°üµÄÀà.
* */
public Class<?> loadClass(String classPath, String className) throws ClassNotFoundException{
if(className.indexOf('.') >= 0) {
throw new ClassNotFoundException(className);
}

File classFile = new File(classPath + ConstantParam.SEPARATOR + className + ".class");
byte[] mainClass = new byte[(int) classFile.length()];
try {
FileInputStream in = new FileInputStream(classFile);
in.read(mainClass);
in.close();
} catch (Exception e) {
//e.printStackTrace();
throw new ClassNotFoundException(className);
}

return super.defineClass(className, mainClass, 0, mainClass.length);
}

/**
* »ñÈ¡classPath
* @return String classPath
* */
public Stri