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package org.apache.tester;


import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;


/**
 * ServletInputStream that converts all characters to upper case.
 * WARNING:  This will only work on 8-bit character sets!
 *
 * @author Craig R. McClanahan
 * @version $Revision: 1.1 $ $Date: 2001/05/30 21:54:51 $
 */

public class UpperCaseInputStream extends ServletInputStream {

    ServletInputStream stream = null;

    public UpperCaseInputStream(ServletInputStream stream)
      throws IOException {
        super();
        this.stream = stream;
    }


    public int read() throws IOException {
        int c = stream.read();
        if (c < 0)
            return (c);
        char ch = (char) c;
        if (Character.isLowerCase(ch))
            ch = Character.toUpperCase(ch);
        return ((int) ch);
    }

    public int read(byte buf[], int off, int len) throws IOException {
        int n = 0;
        for (int i = off; i < (off + len); i++) {
            int c = stream.read();
            if (c < 0) {
                if (n == 0)
                    return (-1);
                break;
            }
            char ch = (char) c;
            if (Character.isLowerCase(ch))
                ch = Character.toUpperCase(ch);
            buf[i] = (byte) ch;
            n++;
        }
        return (n);
    }

    public int read(byte buf[]) throws IOException {
        return (read(buf, 0, buf.length));
    }

    public int readLine(byte buf[], int off, int len) throws IOException {
        int n = 0;
        for (int i = off; i < (off + len); i++) {
            int c = stream.read();
            if (c < 0) {
                if (n == 0)
                    return (-1);
                break;
            }
            char ch = (char) c;
            if (Character.isLowerCase(ch))
                ch = Character.toUpperCase(ch);
            buf[i] = (byte) ch;
            n++;
            if (ch == '\n')
                break;
        }
        return (n);
    }

}

