DataExchangeFactory.java

/**
 * Copyright 2004-2017 the original author or authors.
 *
 * 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 com.ibatis.sqlmap.engine.exchange;

import com.ibatis.sqlmap.engine.type.DomTypeMarker;
import com.ibatis.sqlmap.engine.type.TypeHandlerFactory;

import java.util.List;
import java.util.Map;

/**
 * Factory for DataExchange objects
 */
public class DataExchangeFactory {

  private final DataExchange domDataExchange;
  private final DataExchange listDataExchange;
  private final DataExchange mapDataExchange;
  private final DataExchange primitiveDataExchange;
  private final DataExchange complexDataExchange;

  private TypeHandlerFactory typeHandlerFactory;

  /**
   * Constructor for the factory
   * 
   * @param typeHandlerFactory
   *          - a type handler factory for the factory
   */
  public DataExchangeFactory(TypeHandlerFactory typeHandlerFactory) {
    this.typeHandlerFactory = typeHandlerFactory;
    domDataExchange = new DomDataExchange(this);
    listDataExchange = new ListDataExchange(this);
    mapDataExchange = new ComplexDataExchange(this);
    primitiveDataExchange = new PrimitiveDataExchange(this);
    complexDataExchange = new ComplexDataExchange(this);
  }

  /**
   * Getter for the type handler factory
   * 
   * @return - the type handler factory
   */
  public TypeHandlerFactory getTypeHandlerFactory() {
    return typeHandlerFactory;
  }

  /**
   * Get a DataExchange object for the passed in Class
   * 
   * @param clazz
   *          - the class to get a DataExchange object for
   * @return - the DataExchange object
   */
  public DataExchange getDataExchangeForClass(Class clazz) {
    DataExchange dataExchange = null;
    if (clazz == null) {
      dataExchange = complexDataExchange;
    } else if (DomTypeMarker.class.isAssignableFrom(clazz)) {
      dataExchange = domDataExchange;
    } else if (List.class.isAssignableFrom(clazz)) {
      dataExchange = listDataExchange;
    } else if (Map.class.isAssignableFrom(clazz)) {
      dataExchange = mapDataExchange;
    } else if (typeHandlerFactory.getTypeHandler(clazz) != null) {
      dataExchange = primitiveDataExchange;
    } else {
      dataExchange = new JavaBeanDataExchange(this);
    }
    return dataExchange;
  }

}