org.hibernate.dialect.OracleTypesHelper Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2013, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.dialect;
import org.hibernate.HibernateException;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.internal.util.ReflectHelper;
import org.jboss.logging.Logger;
/**
* A Helper for dealing with the OracleTypes class
*
* @author Steve Ebersole
*/
public class OracleTypesHelper {
private static final CoreMessageLogger log = Logger.getMessageLogger( CoreMessageLogger.class, OracleTypesHelper.class.getName() );
/**
* Singleton access
*/
public static final OracleTypesHelper INSTANCE = new OracleTypesHelper();
private static final String ORACLE_TYPES_CLASS_NAME = "oracle.jdbc.OracleTypes";
private static final String DEPRECATED_ORACLE_TYPES_CLASS_NAME = "oracle.jdbc.driver.OracleTypes";
private final int oracleCursorTypeSqlType;
private OracleTypesHelper() {
int typeCode = -99;
try {
typeCode = extractOracleCursorTypeValue();
}
catch (Exception e) {
log.warn( "Unable to resolve Oracle CURSOR JDBC type code", e );
}
oracleCursorTypeSqlType = typeCode;
}
private int extractOracleCursorTypeValue() {
try {
return locateOracleTypesClass().getField( "CURSOR" ).getInt( null );
}
catch ( Exception se ) {
throw new HibernateException( "Unable to access OracleTypes.CURSOR value", se );
}
}
private Class locateOracleTypesClass() {
try {
return ReflectHelper.classForName( ORACLE_TYPES_CLASS_NAME );
}
catch (ClassNotFoundException e) {
try {
return ReflectHelper.classForName( DEPRECATED_ORACLE_TYPES_CLASS_NAME );
}
catch (ClassNotFoundException e2) {
throw new HibernateException(
String.format(
"Unable to locate OracleTypes class using either known FQN [%s, %s]",
ORACLE_TYPES_CLASS_NAME,
DEPRECATED_ORACLE_TYPES_CLASS_NAME
),
e
);
}
}
}
public int getOracleCursorTypeSqlType() {
return oracleCursorTypeSqlType;
}
// initial code as copied from Oracle8iDialect
//
// private int oracleCursorTypeSqlType = INIT_ORACLETYPES_CURSOR_VALUE;
//
// public int getOracleCursorTypeSqlType() {
// if ( oracleCursorTypeSqlType == INIT_ORACLETYPES_CURSOR_VALUE ) {
// // todo : is there really any reason to keep trying if this fails once?
// oracleCursorTypeSqlType = extractOracleCursorTypeValue();
// }
// return oracleCursorTypeSqlType;
// }
//
// private int extractOracleCursorTypeValue() {
// Class oracleTypesClass;
// try {
// oracleTypesClass = ReflectHelper.classForName( ORACLE_TYPES_CLASS_NAME );
// }
// catch ( ClassNotFoundException cnfe ) {
// try {
// oracleTypesClass = ReflectHelper.classForName( DEPRECATED_ORACLE_TYPES_CLASS_NAME );
// }
// catch ( ClassNotFoundException e ) {
// throw new HibernateException( "Unable to locate OracleTypes class", e );
// }
// }
//
// try {
// return oracleTypesClass.getField( "CURSOR" ).getInt( null );
// }
// catch ( Exception se ) {
// throw new HibernateException( "Unable to access OracleTypes.CURSOR value", se );
// }
// }
}