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package org.openide.util.io;

import java.io.IOException;
import java.io.InputStream;


/**
 * Input stream that is always empty.
 * @author Ales Novak
 */
public class NullInputStream extends InputStream {
    /**
     * True if attempting to read from the stream should throw an {@link IOException}.
     * False to simply return end of file.
     */
    public boolean throwException;

    /** Create an empty null input stream. */
    public NullInputStream() {
    }

    public int read() throws IOException {
        if (throwException) {
            throw new IOException();
        }

        return -1;
    }
}