public Manager(boolean nuevo, File f) {
Diagram diagram;
if (!nuevo) {
xM = new XmlManager(f);
diagram = xM.getDiagram();
} else {
diagram = new Diagram("");
}
MT = new ModoTextoManager(diagram); // Modo editor de texto
// MG = new ModoGraficoManager(); //Editor modo gráfico
// No se si instanciarlo altiro
this.ClickEvent = new pEvent();
this.ClickEvent.addEventListener(this);
}
// Method used to replace an index with a new index type
private static void replaceAnIndex(
XmlManager mgr,
XmlContainer container,
String URI,
String nodeName,
String indexType,
XmlTransaction txn)
throws Throwable {
System.out.println("Replacing index specification " + indexType + " for node " + nodeName);
// Retrieve the index specification from the container
XmlIndexSpecification idxSpec = container.getIndexSpecification(txn);
// See what indexes exist on the container
int count = 0;
System.out.println("Before index replacement.");
XmlIndexDeclaration idxDecl = null;
while ((idxDecl = (idxSpec.next())) != null) {
System.out.println(
"\tFor node '" + idxDecl.name + "', found index: '" + idxDecl.index + "'.");
count++;
}
System.out.println(count + " indexes found.");
// Replace the container's index specification with a new specification
idxSpec.replaceIndex(URI, nodeName, indexType);
// Set the specification back to the container
container.setIndexSpecification(txn, idxSpec, mgr.createUpdateContext());
// Look at the indexes again to make sure our replacement took.
count = 0;
idxSpec.reset();
System.out.println("After index replacement.");
while ((idxDecl = (idxSpec.next())) != null) {
System.out.println(
"\tFor node '" + idxDecl.name + "', found index: '" + idxDecl.index + "'.");
count++;
}
System.out.println(count + " indexes found.");
idxSpec.delete();
}
public static void main(String args[]) throws Throwable {
File path2DbEnv = null;
for (int i = 0; i < args.length; ++i) {
if (args[i].startsWith("-")) {
switch (args[i].charAt(1)) {
case 'h':
path2DbEnv = new File(args[++i]);
break;
default:
usage();
}
}
}
if (path2DbEnv == null || !path2DbEnv.isDirectory()) {
usage();
}
myDbEnv env = null;
XmlContainer openedContainer = null;
XmlTransaction txn = null;
try {
// Open an environment
env = new myDbEnv(path2DbEnv);
XmlManager theMgr = env.getManager();
// open a transactional container
XmlContainerConfig config = new XmlContainerConfig();
config.setTransactional(true);
openedContainer = theMgr.openContainer(theContainer, config);
// Start a transaction
txn = theMgr.createTransaction();
// Replace the index on the "product" node.
replaceAnIndex(
theMgr,
openedContainer,
"",
"product",
"node-attribute-substring-string node-element-equality-string",
txn);
// Commit the index replacement
txn.commit();
} catch (Exception e) {
System.err.println("Error replacing index for container " + theContainer);
System.err.println(" Message: " + e.getMessage());
// In the event of an error, we abort the operation
// The database is left in the same state as it was in before
// we started this operation.
if (txn != null) {
txn.abort();
}
throw e;
} finally {
cleanup(env, openedContainer);
}
} // end main
