//$Id: DatabaseMetadata.java 10726 2006-11-06 14:50:05Z max.andersen@jboss.com $
package org.hibernate.tool.hbm2ddl;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hibernate.HibernateException;
import org.hibernate.exception.JDBCExceptionHelper;
import org.hibernate.exception.SQLExceptionConverter;
import org.hibernate.mapping.Table;
import org.hibernate.dialect.Dialect;
import org.hibernate.util.StringHelper;
/**
* JDBC database metadata
* @author Christoph Sturm, Teodor Danciu
*/
public class DatabaseMetadata {
private static final Logger log = LoggerFactory.getLogger(DatabaseMetadata.class);
private final Map tables = new HashMap();
private final Set sequences = new HashSet();
private final boolean extras;
private DatabaseMetaData meta;
private SQLExceptionConverter sqlExceptionConverter;
public DatabaseMetadata(Connection connection, Dialect dialect) throws SQLException {
this(connection, dialect, true);
}
public DatabaseMetadata(Connection connection, Dialect dialect, boolean extras) throws SQLException {
sqlExceptionConverter = dialect.buildSQLExceptionConverter();
meta = connection.getMetaData();
this.extras = extras;
initSequences(connection, dialect);
}
private static final String[] TYPES = {"TABLE", "VIEW"};
public TableMetadata getTableMetadata(String name, String schema, String catalog, boolean isQuoted) throws HibernateException {
Object identifier = identifier(catalog, schema, name);
TableMetadata table = (TableMetadata) tables.get(identifier);
if (table!=null) {
return table;
}
else {
try {
ResultSet rs = null;
try {
if ( (isQuoted && meta.storesMixedCaseQuotedIdentifiers())) {
rs = meta.getTables(catalog, schema, name, TYPES);
} else if ( (isQuoted && meta.storesUpperCaseQuotedIdentifiers())
|| (!isQuoted && meta.storesUpperCaseIdentifiers() )) {
rs = meta.getTables(
StringHelper.toUpperCase(catalog),
StringHelper.toUpperCase(schema),
StringHelper.toUpperCase(name),
TYPES
);
}
else if ( (isQuoted && meta.storesLowerCaseQuotedIdentifiers())
|| (!isQuoted && meta.storesLowerCaseIdentifiers() )) {
rs = meta.getTables(
StringHelper.toLowerCase(catalog),
StringHelper.toLowerCase(schema),
StringHelper.toLowerCase(name),
TYPES
);
}
else {
rs = meta.getTables(catalog, schema, name, TYPES);
}
while ( rs.next() ) {
String tableName = rs.getString("TABLE_NAME");
if ( name.equalsIgnoreCase(tableName) ) {
table = new TableMetadata(rs, meta, extras);
tables.put(identifier, table);
return table;
}
}
log.info("table not found: " + name);
return null;
}
finally {
if (rs!=null) rs.close();
}
}
catch (SQLException sqle) {
throw JDBCExceptionHelper.convert(
sqlExceptionConverter,
sqle,
"could not get table metadata: " + name
);
}
}
}
private Object identifier(String catalog, String schema, String name) {
return Table.qualify(catalog,schema,name);
}
private void initSequences(Connection connection, Dialect dialect) throws SQLException {
if ( dialect.supportsSequences() ) {
String sql = dialect.getQuerySequencesString();
if (sql!=null) {
Statement statement = null;
ResultSet rs = null;
try {
statement = connection.createStatement();
rs = statement.executeQuery(sql);
while ( rs.next() ) {
sequences.add( rs.getString(1).toLowerCase().trim() );
}
}
finally {
if (rs!=null) rs.close();
if (statement!=null) statement.close();
}
}
}
}
public boolean isSequence(Object key) {
if (key instanceof String){
String[] strings = StringHelper.split(".", (String) key);
return sequences.contains( strings[strings.length-1].toLowerCase());
}
return false;
}
public boolean isTable(Object key) throws HibernateException {
if(key instanceof String) {
Table tbl = new Table((String)key);
if ( getTableMetadata( tbl.getName(), tbl.getSchema(), tbl.getCatalog(), tbl.isQuoted() ) != null ) {
return true;
} else {
String[] strings = StringHelper.split(".", (String) key);
if(strings.length==3) {
tbl = new Table(strings[2]);
tbl.setCatalog(strings[0]);
tbl.setSchema(strings[1]);
return getTableMetadata( tbl.getName(), tbl.getSchema(), tbl.getCatalog(), tbl.isQuoted() ) != null;
} else if (strings.length==2) {
tbl = new Table(strings[1]);
tbl.setSchema(strings[0]);
return getTableMetadata( tbl.getName(), tbl.getSchema(), tbl.getCatalog(), tbl.isQuoted() ) != null;
}
}
}
return false;
}
public String toString() {
return "DatabaseMetadata" + tables.keySet().toString() + sequences.toString();
}
}