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* Lawrence Berkeley National Laboratory (subject to receipt of any required
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package nux.xom.sandbox;
import java.io.File;
import nu.xom.Builder;
import nu.xom.Document;
import nu.xom.Node;
import nux.xom.pool.XOMUtil;
import nux.xom.xquery.XQueryUtil;
/**
* Usecase examples for XQuery/XPath update facility.
*
* @author whoschek.AT.lbl.DOT.gov
* @author $Author: hoschek3 $
* @version $Revision: 1.1 $, $Date: 2005/11/11 23:18:28 $
*/
public class XQueryUpdateTest {
private int count = 0;
private XQueryUpdateTest() {} // not instantiable
/** runs the test */
public static void main(String[] args) throws Exception {
new XQueryUpdateTest().run(args);
}
private void run(String[] args) throws Exception {
Document doc = new Builder().build(new File("samples/data/articles.xml"));
System.out.println("input=\n" + XOMUtil.toPrettyXML(doc));
// update(doc, "//article[@name='chair']", "(. , ., .)", "make copies");
update(doc, "//node() | //@*", ".", "identity transform");
update(doc, "//@*", "()", "delete all attributes");
update(doc, "//article[@name='chair']", "()", "delete all chairs");
update(doc, "//article", "if (@name='chair') then () else .", "delete all chairs (equivalent)");
update(doc, "//article/@onStock[../@name='chair']", "()", "delete stock info of chairs");
update(doc, "//article[@name='chair']/prize", "9.5", "set prize of chair to 9.5");
update(doc, "//article[@name='chair']/@onStock", "0", "set attribute value to 0");
update(doc, "//article[@name='chair']/@onStock", ". + 50", "increment attribute value by 50");
update(doc, "//article/prize", ". * 0.95", "make all articles a bit cheaper");
update(doc, "//article[1]", "(//article[2], .)", "move article position: move second article before first article");
update(doc, "/articles/article[last()]", "(., <foo/>, <article name='sofa' onStock='40'> <prize>30.0</prize> <quantity>500</quantity> </article>)", "append some new elements at end");
update(doc, "//@onStock", "attribute {'availability'} { string(.) }", "rename an attribute");
update(doc, "//article/prize", "<price>{string(.)}</price>", "rename an element");
update(doc, "//article/prize", "attribute {'price'} {string(.)}", "turn an element into an attribute");
update(doc, "/*", "(comment {'database of articles on stock'}, ., comment {'end of database'} )", "add comments before and after root element");
update(doc, "//article", "prize", "delete all articles, only retaining their prize");
update(doc, "//article", "<envelope total='{prize * quantity}'>{.}</envelope>", "wrap each article into a new element with a derived attribute");
update(doc, "//article/*[1]", "(<summary total='{../prize * ../quantity}'></summary>, .)", "add a summary element to each article");
update(doc, "//article", "(comment {index-of(../*, .)}, .)", "add item number ID comment before each article");
update(doc, "//article/*[1]", "(., attribute {'id'} {index-of(../../*, ..)} )", "add item number ID attribute to each article");
}
private void update(Node contextNode, String select, String morpher, String msg) {
contextNode = contextNode.copy(); // each test is independent of the other tests
XQueryUtil.update(contextNode, select, morpher);
System.out.println("\nQ" + count + ": "+ msg + ": update("+ select + ", "+ morpher +")\noutput=\n" + XOMUtil.toPrettyXML(contextNode));
count++;
}
}