Prof. Guido Russo - Scope - Università degli Studi di Napoli Federico II

* Inserisce nel file di configurazione dependences.xml la dipendenza che rappresenta
l'appartenenza del dispositivo deviceName alla farm farmName
* @param String farmName
* @param String deviceName
* @return boolean
*/
public boolean setFarmOfDevice(String farmName, String deviceName)
{
if (!(Arrays.asList(getDevices()).contains(deviceName))) {
return false;
}
if (!(Arrays.asList(getFarms()).contains(farmName))) {
addFarm(farmName);
}
String oldFarmName = getFarmOfDevice(deviceName);
if (farmName.equals(oldFarmName)) {
return true;
}
if ((oldFarmName != null) && (!(removeDeviceOfFarm(deviceName, oldFarmName)))) {
return false;
}
Element arcElement = this.dependency.createElement("arc");
if (arcElement == null) {
return false;
}
arcElement.setAttribute("source", farmName);
arcElement.setAttribute("target", deviceName);
this.dependency.getLastChild().appendChild(arcElement);
Document tmp = saveDocument(this.dependency, this.dependencyFile,
this.dependencyDtdFileName);
if (tmp != null)
this.dependency = tmp;
else {
return false;
}
return true;
}
/**
* Rimuove dal file di configurazione dependences.xml la dipendenza che rappresenta
l'appartenenza del dispositivo deviceName alla farm farmName
* @param String farmName
* @param String deviceName
* @return boolean
*/
public boolean removeDeviceOfFarm(String deviceName, String farmName)
{
String oldFarmName;
if ((!(Arrays.asList(getFarms()).contains(farmName))) ||
(!(Arrays.asList(getDevices()).contains(deviceName))) ||
((oldFarmName = getFarmOfDevice(deviceName)) == null))
{
return false;
}
NodeList nodes = XPath("dependencies/arc[@source=\"" + farmName + "\"][@target=\"" +
deviceName + "\"]", this.dependency);
if (nodes == null) {
return false;
}
Node arcElement = nodes.item(0);
arcElement.getParentNode().removeChild(arcElement);
Document tmp = saveDocument(this.dependency, this.dependencyFile,
this.dependencyDtdFileName);
if (tmp != null)
this.dependency = tmp;
else {
return false;
}
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