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scorex package for Java SCORE

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package scorex.io;

/**
 * A character stream that collects its output in a string buffer.
 */
public class StringWriter extends Writer {

    private final StringBuffer buf;

    public StringWriter() {
        buf = new StringBuffer();
    }

    public StringWriter(int initialSize) {
        if (initialSize < 0) {
            throw new IllegalArgumentException("Negative buffer size");
        }
        buf = new StringBuffer(initialSize);
    }

    public void write(int c) {
        buf.append((char) c);
    }

    public void write(char[] cbuf, int off, int len) {
        if ((off < 0) || (off > cbuf.length) || (len < 0) ||
            ((off + len) > cbuf.length) || ((off + len) < 0)) {
            throw new IndexOutOfBoundsException();
        } else if (len == 0) {
            return;
        }
        buf.append(cbuf, off, len);
    }

    public void write(String str) {
        buf.append(str);
    }

    public void write(String str, int off, int len)  {
        buf.append(str.substring(off, off + len));
    }

    public StringWriter append(CharSequence csq) {
        if (csq == null)
            write("null");
        else
            write(csq.toString());
        return this;
    }

    public StringWriter append(CharSequence csq, int start, int end) {
        CharSequence cs = (csq == null ? "null" : csq);
        write(cs.subSequence(start, end).toString());
        return this;
    }

    public StringWriter append(char c) {
        write(c);
        return this;
    }

    public String toString() {
        return buf.toString();
    }

    public StringBuffer getBuffer() {
        return buf;
    }

    public void flush() {
    }

    public void close() throws IOException {
    }
}