springobjectmapper.FieldPropertyRowMapper.java Source code

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Here is the source code for springobjectmapper.FieldPropertyRowMapper.java

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/*
 * Copyright 2010 Janne Hietamaki
 *
 * 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 springobjectmapper;

import java.lang.reflect.Field;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.objenesis.ObjenesisHelper;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.util.ReflectionUtils;

public class FieldPropertyRowMapper<T> implements RowMapper<T> {
    private final Class<T> typeClass;
    private final Map<String, Field> fieldMapping;

    public FieldPropertyRowMapper(Class<T> typeClass, TableProperties<T> properties) {
        this.typeClass = typeClass;
        this.fieldMapping = getFieldMappings(properties.allFields());
    }

    private Map<String, Field> getFieldMappings(List<Field> fields) {
        Map<String, Field> result = new HashMap<String, Field>();
        for (Field field : fields) {
            result.put(SqlStringUtils.fieldName(field), field);
        }
        return result;
    }

    @Override
    public T mapRow(ResultSet rs, int rowNum) throws SQLException {
        try {
            T result = newObject(typeClass);
            for (Entry<String, Field> entry : fieldMapping.entrySet()) {
                Object value = rs.getObject(entry.getKey());
                ReflectionUtils.setField(entry.getValue(), result, value);
            }
            return result;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @SuppressWarnings("unchecked")
    private T newObject(Class<T> type) {
        return (T) ObjenesisHelper.newInstance(type);
    }
}