org.onebusaway.csv_entities.schema.DefaultFieldMapping.java Source code

Introduction

Here is the source code for org.onebusaway.csv_entities.schema.DefaultFieldMapping.java

Source

/**
 * Copyright (C) 2011 Brian Ferris <bdferris@onebusaway.org>
 *
 * 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.onebusaway.csv_entities.schema;

import java.util.Map;

import org.apache.commons.beanutils.ConvertUtils;
import org.apache.commons.beanutils.Converter;
import org.onebusaway.csv_entities.CsvEntityContext;
import org.onebusaway.csv_entities.exceptions.NoDefaultConverterException;

public class DefaultFieldMapping extends AbstractFieldMapping {

    protected Class<?> _objFieldType;

    private Converter _converter;

    public DefaultFieldMapping(Class<?> entityType, String csvFieldName, String objFieldName, Class<?> objFieldType,
            boolean required) {
        super(entityType, csvFieldName, objFieldName, required);
        _objFieldType = objFieldType;
        _converter = ConvertUtils.lookup(objFieldType);
        if (_converter == null && objFieldType.equals(Object.class))
            _converter = new DefaultConverter();
    }

    public void translateFromCSVToObject(CsvEntityContext context, Map<String, Object> csvValues,
            BeanWrapper object) {

        if (isMissingAndOptional(csvValues))
            return;

        Object csvValue = csvValues.get(_csvFieldName);
        Object objValue = convertCsvValue(csvValue);
        object.setPropertyValue(_objFieldName, objValue);
    }

    public void translateFromObjectToCSV(CsvEntityContext context, BeanWrapper object,
            Map<String, Object> csvValues) {

        if (isMissingAndOptional(object))
            return;

        Object objValue = object.getPropertyValue(_objFieldName);
        csvValues.put(_csvFieldName, objValue);
    }

    private Object convertCsvValue(Object csvValue) {
        if (_converter != null) {
            return _converter.convert(_objFieldType, csvValue);
        } else if (csvValue != null && _objFieldType.isAssignableFrom(csvValue.getClass())) {
            return csvValue;
        } else {
            throw new NoDefaultConverterException(_entityType, _csvFieldName, _objFieldName, _objFieldType);
        }
    }
}