BufErr.java

import java.io.Reader;
import com.fasterxml.aalto.in.XmlScanner;
import com.fasterxml.aalto.in.ReaderConfig;

public class BufErr {

public static void main(String[] args) {
    try {
        Reader rdr = new StringArrayReader(new String[] {
            "<foo><bar>text<",
            "/",
            "bar></foo>"
        }); 
        ReaderConfig cfg = new ReaderConfig();
        cfg.doCoalesceText(true);
        XmlScanner scan = new ReaderScanner(cfg, rdr);
        while (scan.nextFromTree() != XmlScanner.TOKEN_EOI) {
            // nop
        }
    } catch (Exception e) {
        e.printStackTrace();
    }       
}   
    
}

StringArrayReader.java

import java.io.Reader;

public class StringArrayReader extends Reader {

private String[] chunks;
private int chunk, pos;

public StringArrayReader(String[] chunks) {
    this.chunks = chunks;
    chunk = pos = 0;
}

public void close() {}

public int read(char[] cbuf, int off, int len) {
    if (chunk >= chunks.length)
        return -1;
    while (pos >= chunks[chunk].length()) {
        chunk++;
        pos = 0;
        if (chunk >= chunks.length)
            return -1;
    }
    len = Math.min(len, chunks[chunk].length() - pos);
    for (int i = 0; i < len; i++)
        cbuf[off+i] = chunks[chunk].charAt(pos+i);
    pos += len;
    return len;
}

}