PropertyProjector.java

Violations

Source code

/*
 * hgcommons 9
 * Hammurapi Group Common Library
 * Copyright (C) 2003  Hammurapi Group
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * 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 library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * URL: http://www.hammurapi.biz/hammurapi-biz/ef/xmenu/hammurapi-group/products/products/hgcommons/index.html
 * e-Mail: support@hammurapi.biz
 */
package biz.hammurapi.sql;

import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

import biz.hammurapi.config.ConfigurationException;
import biz.hammurapi.config.DomConfigFactory;
import biz.hammurapi.config.MapContext;

/**
 * Projects fields from result set to object properties (fields or setters)
 * @author Pavel Vlasov
 * @version $Revision: 1.3 $
 */
public class PropertyProjector extends BaseReflectionProjector implements Projector {
	private Class objectClass;
	private Map fieldMap;
	
	/**
	 * Constructor
	 * @param objectClass Class to instantiate. Must have no-argument public constructor
	 * @param typeMap {@link java.sql.ResultSet#getObject(java.lang.String, java.util.Map)}
	 * @param fieldMap Field map. Can be null. If value of some mapping is null then that field
	 * is suppressed and is not set.
	 * @param lenient If it is set to false than exception will be thrown if property
	 * to set does not exist.
	 * @param toLowerCase If set to true then database field names will be converted to lower case
	 * for field/setters discovery.
	 */
	public PropertyProjector(Class objectClass, Map typeMap, Map fieldMap) {
		super(typeMap);
		this.objectClass=objectClass;
		this.fieldMap=fieldMap;
	}		

	/**
	 * Instantiates object using default constructors and then sets properties.
	 */
	public Object project(ResultSet rs) throws SQLException {		
		try {
			Object instance = objectClass.newInstance();
			ResultSetMetaData metaData = rs.getMetaData();
			int cc=metaData.getColumnCount();
			Map contextMap=new HashMap();
			for (int i=1; i<=cc; i++) {
				String colName=metaData.getColumnName(i);
				String propertyName=propertyName(colName);
				
				if (fieldMap!=null && fieldMap.containsKey(propertyName)) {
					propertyName=(String) fieldMap.get(propertyName);
				}
				
				if (propertyName!=null) {
					contextMap.put(propertyName, getColumn(rs, colName));
				}
			}
			DomConfigFactory.inject(instance, new MapContext(contextMap));
			return instance;
		} catch (SQLException e) {
			throw e;
		} catch (Exception e) {
			throw new SQLExceptionEx(e);
		}
	}

}