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  /*
   * Copyright 2004 - 2011 Brian McCallister
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 package org.skife.jdbi.v2;
 
 
 import java.sql.Time;
 import java.util.Date;
 import java.util.Map;

A result set mapper which maps the fields in a statement into a JavaBean. This uses the JDK's built in bean mapping facilities, so it does not support nested properties.
 
 public class BeanMapper<T> implements ResultSetMapper<T>
 {
     private final Class<T> type;
     private final Map<StringPropertyDescriptorproperties = new HashMap<StringPropertyDescriptor>();
 
     public BeanMapper(Class<T> type)
     {
         this. = type;
         try {
             BeanInfo info = Introspector.getBeanInfo(type);
 
             for (PropertyDescriptor descriptor : info.getPropertyDescriptors()) {
                 .put(descriptor.getName().toLowerCase(), descriptor);
             }
         }
         catch (IntrospectionException e) {
             throw new IllegalArgumentException(e);
         }
     }
 
     @SuppressWarnings({"unchecked""rawtypes"})
     public T map(int rowResultSet rsStatementContext ctx)
         throws SQLException
     {
         T bean;
         try {
             bean = .newInstance();
         }
         catch (Exception e) {
             throw new IllegalArgumentException(String.format("A bean, %s, was mapped " +
                                                              "which was not instantiable".getName()), e);
         }
 
         ResultSetMetaData metadata = rs.getMetaData();
 
         for (int i = 1; i <= metadata.getColumnCount(); ++i) {
             String name = metadata.getColumnLabel(i).toLowerCase();
 
             PropertyDescriptor descriptor = .get(name);
 
             if (descriptor != null) {
                 Class type = descriptor.getPropertyType();
 
                 Object value;
 
                 if (type.isAssignableFrom(Boolean.class) || type.isAssignableFrom(boolean.class)) {
                     value = rs.getBoolean(i);
                 }
                 else if (type.isAssignableFrom(Byte.class) || type.isAssignableFrom(byte.class)) {
                     value = rs.getByte(i);
                 }
                 else if (type.isAssignableFrom(Short.class) || type.isAssignableFrom(short.class)) {
                     value = rs.getShort(i);
                 }
                 else if (type.isAssignableFrom(Integer.class) || type.isAssignableFrom(int.class)) {
                     value = rs.getInt(i);
                 }
                 else if (type.isAssignableFrom(Long.class) || type.isAssignableFrom(long.class)) {
                     value = rs.getLong(i);
                 }
                else if (type.isAssignableFrom(Float.class) || type.isAssignableFrom(float.class)) {
                    value = rs.getFloat(i);
                }
                else if (type.isAssignableFrom(Double.class) || type.isAssignableFrom(double.class)) {
                    value = rs.getDouble(i);
                }
                else if (type.isAssignableFrom(BigDecimal.class)) {
                    value = rs.getBigDecimal(i);
                }
                else if (type.isAssignableFrom(Timestamp.class)) {
                    value = rs.getTimestamp(i);
                }
                else if (type.isAssignableFrom(Time.class)) {
                    value = rs.getTime(i);
                }
                else if (type.isAssignableFrom(Date.class)) {
                    value = rs.getDate(i);
                }
                else if (type.isAssignableFrom(String.class)) {
                    value = rs.getString(i);
                }
                else if (type.isEnum()) {
                    value = Enum.valueOf(typers.getString(i));
                }
                else {
                    value = rs.getObject(i);
                }
				if (rs.wasNull() && !type.isPrimitive()) {
					value = null;
				}
				try
				{
                    descriptor.getWriteMethod().invoke(beanvalue);
                }
                catch (IllegalAccessException e) {
                    throw new IllegalArgumentException(String.format("Unable to access setter for " +
                                                                     "property, %s"name), e);
                }
                catch (InvocationTargetException e) {
                    throw new IllegalArgumentException(String.format("Invocation target exception trying to " +
                                                                     "invoker setter for the %s property"name), e);
                }
                catch (NullPointerException e) {
                    throw new IllegalArgumentException(String.format("No appropriate method to " +
                                                                     "write value %s "value.toString()), e);
                }
            }
        }
        return bean;
    }
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