charactertype.java

来自「用Java实现的23个常用设计模式源代码」· Java 代码 · 共 63 行

//$Id: CharacterType.java,v 1.5.2.5 2003/11/21 16:06:40 oneovthafew Exp $
package net.sf.hibernate.type;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;

import net.sf.hibernate.MappingException;

/**
 * <tt>character</tt>: A type that maps an SQL CHAR(1) to a Java Character.
 * @author Gavin King
 */
public class CharacterType extends PrimitiveType implements DiscriminatorType {
	
	public Object get(ResultSet rs, String name) throws SQLException {
		String str = rs.getString(name);
		if (str==null) {
			return null;
		}
		else {
			return new Character( str.charAt(0) );
		}
	}
	
	public Class getPrimitiveClass() {
		return char.class;
	}
	
	public Class getReturnedClass() {
		return Character.class;
	}
	
	public void set(PreparedStatement st, Object value, int index) throws SQLException {
		st.setString( index, (value).toString() );
	}
	
	public int sqlType() {
		return Types.CHAR;
	}
	public String getName() { return "character"; }
	
	public String objectToSQLString(Object value) throws Exception {
		return '\'' + value.toString() + '\'';
	}
	
	public Object stringToObject(String xml) throws Exception {
		if ( xml.length() != 1 ) throw new MappingException("multiple or zero characters found parsing string");
		return new Character( xml.charAt(0) );
	}
	
	public Object fromString(String xml) {
		return new Character( xml.charAt(0) );
	}
	
}