/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
*
* 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.type;
import java.io.CharArrayReader;
import java.io.CharArrayWriter;
import java.io.IOException;
import java.io.Reader;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import org.hibernate.HibernateException;
import org.hibernate.dialect.Dialect;
/**
* Logic to bind stream of char into a VARCHAR
*
* @author Emmanuel Bernard
*/
public abstract class AbstractCharArrayType extends MutableType {
/**
* Convert the char[] into the expected object type
*/
abstract protected Object toExternalFormat(char[] chars);
/**
* Convert the object into the internal char[] representation
*/
abstract protected char[] toInternalFormat(Object chars);
public Object get(ResultSet rs, String name) throws SQLException {
Reader stream = rs.getCharacterStream(name);
if ( stream == null ) return toExternalFormat( null );
CharArrayWriter writer = new CharArrayWriter();
for(;;) {
try {
int c = stream.read();
if ( c == -1) return toExternalFormat( writer.toCharArray() );
writer.write( c );
}
catch (IOException e) {
throw new HibernateException("Unable to read character stream from rs");
}
}
}
public abstract Class getReturnedClass();
public void set(PreparedStatement st, Object value, int index) throws SQLException {
char[] chars = toInternalFormat( value );
st.setCharacterStream(index, new CharArrayReader(chars), chars.length);
}
public int sqlType() {
return Types.VARCHAR;
}
public String objectToSQLString(Object value, Dialect dialect) throws Exception {
return '\'' + new String( toInternalFormat( value ) ) + '\'';
}
public Object stringToObject(String xml) throws Exception {
if (xml == null) return toExternalFormat( null );
int length = xml.length();
char[] chars = new char[length];
for (int index = 0 ; index < length ; index++ ) {
chars[index] = xml.charAt( index );
}
return toExternalFormat( chars );
}
public String toString(Object value) {
if (value == null) return null;
return new String( toInternalFormat( value ) );
}
public Object fromStringValue(String xml) {
if (xml == null) return null;
int length = xml.length();
char[] chars = new char[length];
for (int index = 0 ; index < length ; index++ ) {
chars[index] = xml.charAt( index );
}
return toExternalFormat( chars );
}
protected Object deepCopyNotNull(Object value) throws HibernateException {
char[] chars = toInternalFormat(value);
char[] result = new char[chars.length];
System.arraycopy(chars, 0, result, 0, chars.length);
return toExternalFormat(result);
}
}