package org.litesoft.sandbox.csapp.server;

import java.io.*;

public class SmallFileValidatorOnlyDisplayable7BitAscii implements SmallFileValidator
{
    public static final SmallFileValidator INSTANCE = new SmallFileValidatorOnlyDisplayable7BitAscii();

    @Override
    public AcceptedResult validate( String fileName, byte[] contents )
            throws UnsupportedEncodingException
    {
        String text = new String( contents, "UTF-8" );

        for ( int i = 0; i < text.length(); i++ )
        {
            char c = text.charAt( i );
            if ( (' ' <= c) && (c <= 126) )
            {
                continue;
            }
            if ( c == '\r' || c == '\n' )
            {
                continue;
            }
            throw new UnsupportedEncodingException( "Only Supporting a limited subset of 7-bit Ascii" );
        }
        return new AcceptedResult( fileName, "Accepted: " + fileName, text );
    }
}