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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.type.descriptor.sql;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.NClob;
import java.sql.Ref;
import java.sql.RowId;
import java.sql.SQLXML;
import java.sql.Struct;
import java.sql.Time;
import java.sql.Timestamp;
import java.sql.Types;
import java.util.Calendar;
import java.util.concurrent.ConcurrentHashMap;
import org.hibernate.mapping.Array;
import org.jboss.logging.Logger;
/**
* Maintains the JDBC recommended mappings for JDBC type-code to/from Java Class
* as defined in _Appendix B : Data Type Conversion Tables_ of the _JDBC 4.0 Specification_
*
* Eventually, the plan is to have {@link org.hibernate.dialect.Dialect} and
* {@link java.sql.DatabaseMetaData#getTypeInfo()} contribute this information.
*
* @author Steve Ebersole
*/
@SuppressWarnings("WeakerAccess")
public class JdbcTypeJavaClassMappings {
private static final Logger log = Logger.getLogger( JdbcTypeJavaClassMappings.class );
public static final JdbcTypeJavaClassMappings INSTANCE = new JdbcTypeJavaClassMappings();
private final ConcurrentHashMap javaClassToJdbcTypeCodeMap;
private final ConcurrentHashMap jdbcTypeCodeToJavaClassMap;
private JdbcTypeJavaClassMappings() {
javaClassToJdbcTypeCodeMap = buildJavaClassToJdbcTypeCodeMappings();
jdbcTypeCodeToJavaClassMap = buildJdbcTypeCodeToJavaClassMappings();
}
/**
* For the given Java type, determine the JDBC recommended JDBC type.
*
* This includes the mappings defined in TABLE B-2 - Java Types Mapped to JDBC Types
* as well as some additional "common sense" mappings for things like BigDecimal, BigInteger,
* etc.
*/
public int determineJdbcTypeCodeForJavaClass(Class cls) {
Integer typeCode = javaClassToJdbcTypeCodeMap.get( cls );
if ( typeCode != null ) {
return typeCode;
}
int specialCode = cls.hashCode();
log.debug(
"JDBC type code mapping not known for class [" + cls.getName() + "]; using custom code [" + specialCode + "]"
);
return specialCode;
}
/**
* For the given JDBC type, determine the JDBC recommended Java type. These mappings
* are defined by TABLE B-1 - JDBC Types Mapped to Java Types
*/
public Class determineJavaClassForJdbcTypeCode(Integer typeCode) {
Class cls = jdbcTypeCodeToJavaClassMap.get( typeCode );
if ( cls != null ) {
return cls;
}
log.debugf(
"Java Class mapping not known for JDBC type code [%s]; using java.lang.Object",
typeCode
);
return Object.class;
}
/**
* @see #determineJavaClassForJdbcTypeCode(Integer)
*/
public Class determineJavaClassForJdbcTypeCode(int typeCode) {
return determineJavaClassForJdbcTypeCode( Integer.valueOf( typeCode ) );
}
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
private static ConcurrentHashMap buildJavaClassToJdbcTypeCodeMappings() {
final ConcurrentHashMap workMap = new ConcurrentHashMap<>();
// these mappings are the ones outlined specifically in the spec
workMap.put( String.class, Types.VARCHAR );
workMap.put( BigDecimal.class, Types.NUMERIC );
workMap.put( BigInteger.class, Types.NUMERIC );
workMap.put( Boolean.class, Types.BIT );
workMap.put( Short.class, Types.SMALLINT );
workMap.put( Integer.class, Types.INTEGER );
workMap.put( Long.class, Types.BIGINT );
workMap.put( Float.class, Types.REAL );
workMap.put( Double.class, Types.DOUBLE );
workMap.put( byte[].class, Types.LONGVARBINARY );
workMap.put( java.sql.Date.class, Types.DATE );
workMap.put( Time.class, Types.TIME );
workMap.put( Timestamp.class, Types.TIMESTAMP );
workMap.put( Blob.class, Types.BLOB );
workMap.put( Clob.class, Types.CLOB );
workMap.put( Array.class, Types.ARRAY );
workMap.put( Struct.class, Types.STRUCT );
workMap.put( Ref.class, Types.REF );
workMap.put( Class.class, Types.JAVA_OBJECT );
workMap.put( RowId.class, Types.ROWID );
workMap.put( SQLXML.class, Types.SQLXML );
// additional "common sense" registrations
workMap.put( Character.class, Types.CHAR );
workMap.put( char[].class, Types.VARCHAR );
workMap.put( Character[].class, Types.VARCHAR );
workMap.put( Byte[].class, Types.LONGVARBINARY );
workMap.put( java.util.Date.class, Types.TIMESTAMP );
workMap.put( Calendar.class, Types.TIMESTAMP );
return workMap;
}
private static ConcurrentHashMap buildJdbcTypeCodeToJavaClassMappings() {
final ConcurrentHashMap workMap = new ConcurrentHashMap<>();
workMap.put( Types.CHAR, String.class );
workMap.put( Types.VARCHAR, String.class );
workMap.put( Types.LONGVARCHAR, String.class );
workMap.put( Types.NCHAR, String.class );
workMap.put( Types.NVARCHAR, String.class );
workMap.put( Types.LONGNVARCHAR, String.class );
workMap.put( Types.NUMERIC, BigDecimal.class );
workMap.put( Types.DECIMAL, BigDecimal.class );
workMap.put( Types.BIT, Boolean.class );
workMap.put( Types.BOOLEAN, Boolean.class );
workMap.put( Types.TINYINT, Byte.class );
workMap.put( Types.SMALLINT, Short.class );
workMap.put( Types.INTEGER, Integer.class );
workMap.put( Types.BIGINT, Long.class );
workMap.put( Types.REAL, Float.class );
workMap.put( Types.DOUBLE, Double.class );
workMap.put( Types.FLOAT, Double.class );
workMap.put( Types.BINARY, byte[].class );
workMap.put( Types.VARBINARY, byte[].class );
workMap.put( Types.LONGVARBINARY, byte[].class );
workMap.put( Types.DATE, java.sql.Date.class );
workMap.put( Types.TIME, Time.class );
workMap.put( Types.TIMESTAMP, Timestamp.class );
workMap.put( Types.BLOB, Blob.class );
workMap.put( Types.CLOB, Clob.class );
workMap.put( Types.NCLOB, NClob.class );
workMap.put( Types.ARRAY, Array.class );
workMap.put( Types.STRUCT, Struct.class );
workMap.put( Types.REF, Ref.class );
workMap.put( Types.JAVA_OBJECT, Class.class );
workMap.put( Types.ROWID, RowId.class );
workMap.put( Types.SQLXML, SQLXML.class );
return workMap;
}
}