/*
* Generates rollback statements from the inverse changes returned by createInverses().
* Throws RollbackImpossibleException if the changes created by createInverses() is not supported for the passed database.
*
*/
private SqlStatement[] generateRollbackStatementsFromInverse(Database database)
throws RollbackImpossibleException {
Change[] inverses = createInverses();
if (inverses == null) {
throw new RollbackImpossibleException("No inverse to " + getClass().getName() + " created");
}
List<SqlStatement> statements = new ArrayList<SqlStatement>();
try {
for (Change inverse : inverses) {
if (!inverse.supports(database)) {
throw new RollbackImpossibleException(
ChangeFactory.getInstance().getChangeMetaData(inverse).getName()
+ " is not supported on "
+ database.getShortName());
}
statements.addAll(Arrays.asList(inverse.generateStatements(database)));
}
} catch (LiquibaseException e) {
throw new RollbackImpossibleException(e);
}
return statements.toArray(new SqlStatement[statements.size()]);
}
/**
* 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 String getDescription() {
List<Change> changes = getChanges();
if (changes.size() == 0) {
return "empty";
}
List<String> messages = new ArrayList<String>();
for (Change change : changes) {
messages.add(change.getDescription());
}
return StringUtils.limitSize(StringUtils.join(messages, "; "), 255);
}
public void addChange(Change change) {
if (change == null) {
return;
}
changes.add(change);
change.setChangeSet(this);
}
protected Object serializeValue(Object value) throws ParsedNodeException {
if (value instanceof Collection) {
List returnList = new ArrayList();
for (Object obj : (Collection) value) {
Object objValue = serializeValue(obj);
if (objValue != null) {
returnList.add(objValue);
}
}
if (((Collection) value).size() == 0) {
return null;
} else {
return returnList;
}
} else if (value instanceof LiquibaseSerializable) {
return ((LiquibaseSerializable) value).serialize();
} else {
return value;
}
}
@Override
public void load(ParsedNode parsedNode, ResourceAccessor resourceAccessor)
throws ParsedNodeException {
ChangeMetaData metaData = ChangeFactory.getInstance().getChangeMetaData(this);
this.setResourceAccessor(resourceAccessor);
try {
for (ChangeParameterMetaData param : metaData.getParameters().values()) {
if (Collection.class.isAssignableFrom(param.getDataTypeClass())) {
Class collectionType = (Class) param.getDataTypeClassParameters()[0];
if (param.getDataTypeClassParameters().length == 1) {
if (ColumnConfig.class.isAssignableFrom(collectionType)) {
List<ParsedNode> columnNodes =
new ArrayList<ParsedNode>(parsedNode.getChildren(null, param.getParameterName()));
columnNodes.addAll(parsedNode.getChildren(null, "column"));
Object nodeValue = parsedNode.getValue();
if (nodeValue instanceof ParsedNode) {
columnNodes.add((ParsedNode) nodeValue);
} else if (nodeValue instanceof Collection) {
for (Object nodeValueChild : ((Collection) nodeValue)) {
if (nodeValueChild instanceof ParsedNode) {
columnNodes.add((ParsedNode) nodeValueChild);
}
}
}
for (ParsedNode child : columnNodes) {
if (child.getName().equals("column") || child.getName().equals("columns")) {
List<ParsedNode> columnChildren = child.getChildren(null, "column");
if (columnChildren != null && columnChildren.size() > 0) {
for (ParsedNode columnChild : columnChildren) {
ColumnConfig columnConfig = (ColumnConfig) collectionType.newInstance();
columnConfig.load(columnChild, resourceAccessor);
((ChangeWithColumns) this).addColumn(columnConfig);
}
} else {
ColumnConfig columnConfig = (ColumnConfig) collectionType.newInstance();
columnConfig.load(child, resourceAccessor);
((ChangeWithColumns) this).addColumn(columnConfig);
}
}
}
} else if (LiquibaseSerializable.class.isAssignableFrom(collectionType)) {
List<ParsedNode> childNodes =
new ArrayList<ParsedNode>(parsedNode.getChildren(null, param.getParameterName()));
for (ParsedNode childNode : childNodes) {
LiquibaseSerializable childObject =
(LiquibaseSerializable) collectionType.newInstance();
childObject.load(childNode, resourceAccessor);
((Collection) param.getCurrentValue(this)).add(childObject);
}
}
}
} else if (LiquibaseSerializable.class.isAssignableFrom(param.getDataTypeClass())) {
try {
ParsedNode child = parsedNode.getChild(null, param.getParameterName());
if (child != null) {
LiquibaseSerializable serializableChild =
(LiquibaseSerializable) param.getDataTypeClass().newInstance();
serializableChild.load(child, resourceAccessor);
param.setValue(this, serializableChild);
}
} catch (InstantiationException e) {
throw new UnexpectedLiquibaseException(e);
} catch (IllegalAccessException e) {
throw new UnexpectedLiquibaseException(e);
}
} else {
Object childValue =
parsedNode.getChildValue(null, param.getParameterName(), param.getDataTypeClass());
if (childValue == null
&& param.getSerializationType() == SerializationType.DIRECT_VALUE) {
childValue = parsedNode.getValue();
}
param.setValue(this, childValue);
}
}
} catch (InstantiationException e) {
throw new UnexpectedLiquibaseException(e);
} catch (IllegalAccessException e) {
throw new UnexpectedLiquibaseException(e);
}
customLoadLogic(parsedNode, resourceAccessor);
try {
this.finishInitialization();
} catch (SetupException e) {
throw new ParsedNodeException(e);
}
}
@Override
public boolean dataTypeIsNotModifiable(final String typeName) {
return unmodifiableDataTypes.contains(typeName.toLowerCase());
}
public void rollback(Database database) throws RollbackFailedException {
try {
Executor executor = ExecutorService.getInstance().getExecutor(database);
executor.comment("Rolling Back ChangeSet: " + toString());
database.setObjectQuotingStrategy(objectQuotingStrategy);
// set auto-commit based on runInTransaction if database supports DDL in transactions
if (database.supportsDDLInTransaction()) {
database.setAutoCommit(!runInTransaction);
}
RanChangeSet ranChangeSet = database.getRanChangeSet(this);
if (hasCustomRollbackChanges()) {
final List<SqlStatement> statements = new LinkedList<SqlStatement>();
for (Change change : rollback.getChanges()) {
if (((change instanceof DbmsTargetedChange))
&& !DatabaseList.definitionMatches(
((DbmsTargetedChange) change).getDbms(), database, true)) {
continue;
}
SqlStatement[] changeStatements = change.generateStatements(database);
if (changeStatements != null) {
statements.addAll(Arrays.asList(changeStatements));
}
}
if (!statements.isEmpty()) {
database.executeRollbackStatements(
statements.toArray(new SqlStatement[] {}), sqlVisitors);
}
} else {
List<Change> changes = getChanges();
for (int i = changes.size() - 1; i >= 0; i--) {
Change change = changes.get(i);
database.executeRollbackStatements(change, sqlVisitors);
}
}
if (runInTransaction) {
database.commit();
}
log.debug("ChangeSet " + toString() + " has been successfully rolled back.");
} catch (Exception e) {
try {
database.rollback();
} catch (DatabaseException e1) {
// ok
}
throw new RollbackFailedException(e);
} finally {
// restore auto-commit to false if this ChangeSet was not run in a transaction,
// but only if the database supports DDL in transactions
if (!runInTransaction && database.supportsDDLInTransaction()) {
try {
database.setAutoCommit(false);
} catch (DatabaseException e) {
throw new RollbackFailedException("Could not resetInternalState autocommit", e);
}
}
}
}
public void addSqlVisitor(SqlVisitor sqlVisitor) {
sqlVisitors.add(sqlVisitor);
}