/**
* Retrieves the <code>User</code> objects representing the database users that are visible to the
* <code>User</code> object represented by the <code>session</code> argument.
*
* <p>If the <code>session</code> argument's <code>User</code> object attribute has isAdmin() true
* (directly or by virtue of a Role), then all of the <code>User</code> objects in this collection
* are considered visible. Otherwise, only this object's special <code>PUBLIC</code> <code>User
* </code> object attribute and the session <code>User</code> object, if it exists in this
* collection, are considered visible.
*
* <p>
*
* @param session The <code>Session</code> object used to determine visibility
* @return a list of <code>User</code> objects visible to the <code>User</code> object contained
* by the <code>session</code> argument.
*/
public HsqlArrayList listVisibleUsers(Session session) {
HsqlArrayList list;
User user;
boolean isAdmin;
String sessionName;
String userName;
list = new HsqlArrayList();
isAdmin = session.isAdmin();
sessionName = session.getUsername();
if (userList == null || userList.size() == 0) {
return list;
}
for (int i = 0; i < userList.size(); i++) {
user = (User) userList.get(i);
if (user == null) {
continue;
}
userName = user.getNameString();
if (isAdmin) {
list.add(user);
} else if (sessionName.equals(userName)) {
list.add(user);
}
}
return list;
}
void addTableColumns(Expression expression, HashSet exclude) {
HsqlArrayList list = new HsqlArrayList();
Table table = getTable();
int count = table.getColumnCount();
for (int i = 0; i < count; i++) {
ColumnSchema column = table.getColumn(i);
String columnName =
columnAliases == null ? column.getName().name : (String) columnAliases.get(i);
if (exclude != null && exclude.contains(columnName)) {
continue;
}
Expression e = new ExpressionColumn(this, column, i);
list.add(e);
}
Expression[] nodes = new Expression[list.size()];
list.toArray(nodes);
expression.nodes = nodes;
}
/** Add all columns to a list of expressions */
void addTableColumns(HsqlArrayList exprList) {
if (namedJoinColumns != null) {
int count = exprList.size();
int position = 0;
for (int i = 0; i < count; i++) {
Expression e = (Expression) exprList.get(i);
String columnName = e.getColumnName();
if (namedJoinColumns.contains(columnName)) {
if (position != i) {
exprList.remove(i);
exprList.add(position, e);
}
e = getColumnExpression(columnName);
exprList.set(position, e);
position++;
}
}
}
addTableColumns(exprList, exprList.size(), namedJoinColumns);
}
public String[] getInitialSchemaSQL() {
HsqlArrayList list = new HsqlArrayList(userList.size());
for (int i = 0; i < userList.size(); i++) {
User user = (User) userList.get(i);
if (user.isSystem) {
continue;
}
HsqlName name = user.getInitialSchema();
if (name == null) {
continue;
}
list.add(user.getInitialSchemaSQL());
}
String[] array = new String[list.size()];
list.toArray(array);
return array;
}
/** Add all columns to a list of expressions */
int addTableColumns(HsqlArrayList expList, int position, HashSet exclude) {
Table table = getTable();
int count = table.getColumnCount();
for (int i = 0; i < count; i++) {
ColumnSchema column = table.getColumn(i);
String columnName =
columnAliases == null ? column.getName().name : (String) columnAliases.get(i);
if (exclude != null && exclude.contains(columnName)) {
continue;
}
Expression e = new ExpressionColumn(this, column, i);
expList.add(position++, e);
}
return position;
}
public void setBlockBytes(byte[] dataBytes, int blockAddress, int blockCount) {
int dataBlockOffset = 0;
while (blockCount > 0) {
int largeBlockIndex = blockAddress / blocksInLargeBlock;
int largeBlockLimit = (blockAddress + blockCount) / blocksInLargeBlock;
if ((blockAddress + blockCount) % blocksInLargeBlock != 0) {
largeBlockLimit++;
}
if (largeBlockIndex >= byteStoreList.size()) {
byteStoreList.add(new byte[largeBlockSize]);
}
byte[] largeBlock = (byte[]) byteStoreList.get(largeBlockIndex);
int blockOffset = blockAddress % blocksInLargeBlock;
int currentBlockCount = blockCount;
if ((blockOffset + currentBlockCount) > blocksInLargeBlock) {
currentBlockCount = blocksInLargeBlock - blockOffset;
}
System.arraycopy(
dataBytes,
dataBlockOffset * lobBlockSize,
largeBlock,
blockOffset * lobBlockSize,
currentBlockCount * lobBlockSize);
blockAddress += currentBlockCount;
dataBlockOffset += currentBlockCount;
blockCount -= currentBlockCount;
}
}