public void store(OutputStream os) throws IOException {
Document doc = XmlUtils.createDocument();
Element root = doc.createElement("AllColumns");
root.setAttribute("firstLineHeader", firstLineHeader ? "true" : "false");
doc.appendChild(root);
String pigLoad = "loaded = LOAD 'filename' USING PigStorage() AS (";
String comma = "";
for (Column c : columns) {
pigLoad += comma + c.getName();
comma = ", ";
Element node = doc.createElement("Column");
root.appendChild(node);
node.setAttribute("name", c.getName());
node.setAttribute("type", c.getType().toString());
if (c.getCount() > 0) {
node.setAttribute("count", Long.toString(c.getCount()));
}
if (c.getType() == FactorType.Numeric) {
if (c.getSum() > 0.0) {
node.setAttribute("sum", Double.toString(c.getSum()));
}
if (c.getMin() <= c.getMax()) {
node.setAttribute("min", Double.toString(c.getMin()));
node.setAttribute("max", Double.toString(c.getMax()));
}
if (c.isQuartile1Valid()) {
node.setAttribute("quartile1", Double.toString(c.getQuartile1()));
}
if (c.isQuartile2Valid()) {
node.setAttribute("quartile2", Double.toString(c.getQuartile2()));
}
if (c.isQuartile3Valid()) {
node.setAttribute("quartile3", Double.toString(c.getQuartile3()));
}
}
}
pigLoad += ");";
Comment c = doc.createComment(pigLoad);
root.appendChild(c);
XmlUtils.writeDocument(doc, new OutputStreamWriter(os));
}
