package liquibase.snapshot.jvm;
import java.sql.SQLException;
import java.util.List;
import liquibase.CatalogAndSchema;
import liquibase.database.AbstractJdbcDatabase;
import liquibase.database.Database;
import liquibase.database.core.InformixDatabase;
import liquibase.database.core.OracleDatabase;
import liquibase.exception.DatabaseException;
import liquibase.snapshot.CachedRow;
import liquibase.snapshot.DatabaseSnapshot;
import liquibase.snapshot.InvalidExampleException;
import liquibase.snapshot.JdbcDatabaseSnapshot;
import liquibase.statement.core.GetViewDefinitionStatement;
import liquibase.structure.DatabaseObject;
import liquibase.structure.core.Relation;
import liquibase.structure.core.Schema;
import liquibase.structure.core.View;
import liquibase.util.StringUtils;
public class ViewSnapshotGenerator extends JdbcSnapshotGenerator {
public ViewSnapshotGenerator() {
super(View.class, new Class[] { Schema.class });
}
// public Boolean has(DatabaseObject example, DatabaseSnapshot snapshot, SnapshotGeneratorChain chain) throws DatabaseException {
// Database database = snapshot.getDatabase();
// if (!(example instanceof View)) {
// return chain.has(example, snapshot);
// }
// String viewName = example.getName();
// Schema schema = example.getSchema();
// try {
// ResultSet rs = getMetaData(database).getTables(database.getJdbcCatalogName(schema), database.getJdbcSchemaName(schema), database.correctObjectName(viewName, View.class), new String[]{"VIEW"});
// try {
// return rs.next();
// } finally {
// try {
// rs.close();
// } catch (SQLException ignore) {
// }
// }
// } catch (SQLException e) {
// throw new DatabaseException(e);
// }
// }
@Override
protected DatabaseObject snapshotObject(DatabaseObject example, DatabaseSnapshot snapshot) throws DatabaseException {
if (((View) example).getDefinition() != null) {
return example;
}
Database database = snapshot.getDatabase();
Schema schema = example.getSchema();
List<CachedRow> viewsMetadataRs = null;
try {
viewsMetadataRs = ((JdbcDatabaseSnapshot) snapshot).getMetaData().getViews(((AbstractJdbcDatabase) database).getJdbcCatalogName(schema), ((AbstractJdbcDatabase) database).getJdbcSchemaName(schema), example.getName());
if (viewsMetadataRs.size() > 0) {
CachedRow row = viewsMetadataRs.get(0);
String rawViewName = row.getString("TABLE_NAME");
String rawSchemaName = StringUtils.trimToNull(row.getString("TABLE_SCHEM"));
String rawCatalogName = StringUtils.trimToNull(row.getString("TABLE_CAT"));
String remarks = row.getString("REMARKS");
if (remarks != null) {
remarks = remarks.replace("''", "'"); //come back escaped sometimes
}
View view = new View().setName(cleanNameFromDatabase(rawViewName, database));
view.setRemarks(remarks);
CatalogAndSchema schemaFromJdbcInfo = ((AbstractJdbcDatabase) database).getSchemaFromJdbcInfo(rawCatalogName, rawSchemaName);
view.setSchema(new Schema(schemaFromJdbcInfo.getCatalogName(), schemaFromJdbcInfo.getSchemaName()));
try {
String definition = database.getViewDefinition(schemaFromJdbcInfo, view.getName());
if (definition.startsWith("FULL_DEFINITION: ")) {
definition = definition.replaceFirst("^FULL_DEFINITION: ", "");
view.setContainsFullDefinition(true);
}
// remove strange zero-termination seen on some Oracle view definitions
int length = definition.length();
if (definition.charAt(length-1) == 0) {
definition = definition.substring(0, length-1);
}
if (database instanceof InformixDatabase) {
// Cleanup
definition = definition.trim();
definition = definition.replaceAll("\\s*,\\s*", ", ");
definition = definition.replaceAll("\\s*;", "");
// Strip the schema definition because it can optionally be included in the tag attribute
definition = definition.replaceAll("(?i)\""+view.getSchema().getName()+"\"\\.", "");
}
view.setDefinition(definition);
} catch (DatabaseException e) {
throw new DatabaseException("Error getting " + database.getConnection().getURL() + " view with " + new GetViewDefinitionStatement(view.getSchema().getCatalogName(), view.getSchema().getName(), rawViewName), e);
}
return view;
} else {
return null;
}
} catch (SQLException e) {
throw new DatabaseException(e);
}
}
@Override
protected void addTo(DatabaseObject foundObject, DatabaseSnapshot snapshot) throws DatabaseException, InvalidExampleException {
if (!snapshot.getSnapshotControl().shouldInclude(View.class)) {
return;
}
if (foundObject instanceof Schema) {
Schema schema = (Schema) foundObject;
Database database = snapshot.getDatabase();
List<CachedRow> viewsMetadataRs = null;
try {
viewsMetadataRs = ((JdbcDatabaseSnapshot) snapshot).getMetaData().getViews(((AbstractJdbcDatabase) database).getJdbcCatalogName(schema), ((AbstractJdbcDatabase) database).getJdbcSchemaName(schema), null);
for (CachedRow row : viewsMetadataRs) {
View view = new View();
view.setName(row.getString("TABLE_NAME"));
view.setSchema(schema);
view.setRemarks(row.getString("REMARKS"));
view.setDefinition(row.getString("OBJECT_BODY"));
if(database instanceof OracleDatabase) {
view.setAttribute("editioning", "Y".equals(row.getString("EDITIONING_VIEW")));
}
schema.addDatabaseObject(view);
}
} catch (SQLException e) {
throw new DatabaseException(e);
}
}
}
//from SQLIteSnapshotGenerator
// protected void readViews(DatabaseSnapshot snapshot, String schema, DatabaseMetaData databaseMetaData) throws SQLException, DatabaseException {
//
// Database database = snapshot.getDatabase();
//
// updateListeners("Reading tables for " + database.toString() + " ...");
// ResultSet rs = databaseMetaData.getTables(
// database.convertRequestedSchemaToCatalog(schema),
// database.convertRequestedSchemaToSchema(schema),
// null,
// new String[]{"TABLE", "VIEW"});
//
// try {
// while (rs.next()) {
// String type = rs.getString("TABLE_TYPE");
// String name = rs.getString("TABLE_NAME");
// String schemaName = rs.getString("TABLE_SCHEM");
// String catalogName = rs.getString("TABLE_CAT");
// String remarks = rs.getString("REMARKS");
//
// if (database.isSystemTable(catalogName, schemaName, name) ||
// database.isLiquibaseTable(name) ||
// database.isSystemView(catalogName, schemaName, name)) {
// continue;
// }
//
// if ("TABLE".equals(type)) {
// Table table = new Table(name);
// table.setRemarks(StringUtils.trimToNull(remarks));
// table.setDatabase(database);
// table.setSchema(schemaName);
// snapshot.getTables().add(table);
// } else if ("VIEW".equals(type)) {
// View view = new View(name);
// view.setSchema(schemaName);
// try {
// view.setDefinition(database.
// getViewDefinition(schema, name));
// } catch (DatabaseException e) {
// System.out.println("Error getting view with " + new GetViewDefinitionStatement(schema, name));
// throw e;
// }
// snapshot.getViews().add(view);
// }
// }
// } finally {
// rs.close();
// }
// }
}