/**
* Gets elements depending on the format specified.
*
* @param format The format specification of the elements to be returned.
* @return a List of all elements in MetaDB with the specified format.
*/
public List<Element> getElementList(String format) {
List<Element> elementList = new ArrayList<Element>();
Connection conn = Conn.initialize();
if (conn != null) {
try {
PreparedStatement getElementListQuery = conn.prepareStatement(GET_ELEMENT_LIST_BY_FORMAT);
getElementListQuery.setString(1, format);
ResultSet getElementListQueryResult = getElementListQuery.executeQuery();
while (getElementListQueryResult.next())
elementList.add(
new Element(
getElementListQueryResult.getString(Global.ELEMENT),
getElementListQueryResult.getString(Global.ELEMENT_FORMAT)));
getElementListQueryResult.close();
getElementListQuery.close();
conn.close();
} catch (Exception e) {
MetaDbHelper.logEvent(e);
}
}
return elementList;
}
/**
* Check if an element exists in the system.
*
* @param elementName The element to be checked for existence.
* @return true if the element exists, false otherwise.
*/
public static boolean elementExists(String elementName) {
try {
ArrayList<String> elementList = (ArrayList<String>) getElementList();
for (String element : elementList) {
if (element.equals(elementName)) return true;
}
} catch (Exception e) {
MetaDbHelper.logEvent(e);
}
return false;
}
/**
* Deletes an element from MetaDB.
*
* @param elementName The desired element name to be added
* @return true if the element with name elementName was deleted, false otherwise
*/
public static boolean deleteElement(String elementName) {
Connection conn = Conn.initialize();
if (conn != null) {
try {
PreparedStatement deleteElement = conn.prepareStatement(DELETE_ELEMENT);
deleteElement.setString(1, elementName);
deleteElement.executeUpdate();
deleteElement.close();
conn.close();
return true;
} catch (Exception e) {
MetaDbHelper.logEvent(e);
}
}
return false;
}
/**
* Returns all the elements in the database.
*
* @return a List of all elements in MetaDB.
*/
public static ArrayList<String> getElementList() {
ArrayList<String> elementList = new ArrayList<String>();
Connection conn = Conn.initialize();
if (conn != null) {
try {
PreparedStatement getElementListQuery = conn.prepareStatement(GET_ELEMENT_LIST);
ResultSet getElementListQueryResult = getElementListQuery.executeQuery();
while (getElementListQueryResult.next())
elementList.add(getElementListQueryResult.getString(Global.ELEMENT));
getElementListQueryResult.close();
getElementListQuery.close();
conn.close();
} catch (Exception e) {
MetaDbHelper.logEvent(e);
}
}
return elementList;
}