/**
* Takes a list of SqlVisitors and returns a new list with only the SqlVisitors set to apply to
* rollbacks
*/
protected List<SqlVisitor> filterRollbackVisitors(final List<SqlVisitor> visitors) {
final List<SqlVisitor> rollbackVisitors = new ArrayList<SqlVisitor>();
if (visitors != null) {
for (SqlVisitor visitor : visitors) {
if (visitor.isApplyToRollback()) {
rollbackVisitors.add(visitor);
}
}
}
return rollbackVisitors;
}
public CheckSum generateCheckSum() {
StringBuffer stringToMD5 = new StringBuffer();
for (Change change : getChanges()) {
stringToMD5.append(change.generateCheckSum()).append(":");
}
for (SqlVisitor visitor : this.getSqlVisitors()) {
stringToMD5.append(visitor.generateCheckSum()).append(";");
}
return CheckSum.compute(stringToMD5.toString());
}
@Override
public void executeRollbackStatements(Change change, List<SqlVisitor> sqlVisitors)
throws LiquibaseException, UnsupportedChangeException, RollbackImpossibleException {
SqlStatement[] statements = change.generateRollbackStatements(this);
List<SqlVisitor> rollbackVisitors = new ArrayList<SqlVisitor>();
if (sqlVisitors != null) {
for (SqlVisitor visitor : sqlVisitors) {
if (visitor.isApplyToRollback()) {
rollbackVisitors.add(visitor);
}
}
}
execute(statements, rollbackVisitors);
}
protected void handleChildNode(ParsedNode child, ResourceAccessor resourceAccessor)
throws ParsedNodeException {
if (child.getName().equals("rollback")) {
handleRollbackNode(child, resourceAccessor);
} else if (child.getName().equals("validCheckSum")
|| child.getName().equals("validCheckSums")) {
if (child.getValue() == null) {
return;
}
if (child.getValue() instanceof Collection) {
for (Object checksum : (Collection) child.getValue()) {
addValidCheckSum((String) checksum);
}
} else {
addValidCheckSum(child.getValue(String.class));
}
} else if (child.getName().equals("modifySql")) {
String dbmsString = StringUtils.trimToNull(child.getChildValue(null, "dbms", String.class));
String contextString =
StringUtils.trimToNull(child.getChildValue(null, "context", String.class));
String labelsString =
StringUtils.trimToNull(child.getChildValue(null, "labels", String.class));
boolean applyToRollback = child.getChildValue(null, "applyToRollback", false);
Set<String> dbms = new HashSet<String>();
if (dbmsString != null) {
dbms.addAll(StringUtils.splitAndTrim(dbmsString, ","));
}
ContextExpression context = null;
if (contextString != null) {
context = new ContextExpression(contextString);
}
Labels labels = null;
if (labelsString != null) {
labels = new Labels(labelsString);
}
List<ParsedNode> potentialVisitors = child.getChildren();
for (ParsedNode node : potentialVisitors) {
SqlVisitor sqlVisitor = SqlVisitorFactory.getInstance().create(node.getName());
if (sqlVisitor != null) {
sqlVisitor.setApplyToRollback(applyToRollback);
if (dbms.size() > 0) {
sqlVisitor.setApplicableDbms(dbms);
}
sqlVisitor.setContexts(context);
sqlVisitor.setLabels(labels);
sqlVisitor.load(node, resourceAccessor);
addSqlVisitor(sqlVisitor);
}
}
} else if (child.getName().equals("preConditions")) {
this.preconditions = new PreconditionContainer();
try {
this.preconditions.load(child, resourceAccessor);
} catch (ParsedNodeException e) {
e.printStackTrace();
}
} else if (child.getName().equals("changes")) {
for (ParsedNode changeNode : child.getChildren()) {
handleChildNode(changeNode, resourceAccessor);
}
} else {
addChange(toChange(child, resourceAccessor));
}
}