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    • com.querydsl.sql.dml.BeanMapper Maven / Gradle / Ivy

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    /*
 * Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
 *
 * 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.querydsl.sql.dml;

import com.querydsl.core.types.Path;
import com.querydsl.core.util.BeanMap;
import com.querydsl.sql.RelationalPath;
import com.querydsl.sql.types.Null;
import java.util.LinkedHashMap;
import java.util.Map;

/**
 * Creates the mapping by inspecting object via bean inspection. Given bean doesn't need to
 * have @Column metadata, but the fields need to have the same name as in the given relational path.
 *
 * @author tiwe
 */
public class BeanMapper extends AbstractMapper {

  public static final BeanMapper DEFAULT = new BeanMapper(false);

  public static final BeanMapper WITH_NULL_BINDINGS = new BeanMapper(true);

  private final boolean withNullBindings;

  public BeanMapper() {
    this(false);
  }

  public BeanMapper(boolean withNullBindings) {
    this.withNullBindings = withNullBindings;
  }

  @SuppressWarnings({"rawtypes", "unchecked"})
  @Override
  public Map, Object> createMap(RelationalPath entity, Object bean) {
    Map, Object> values = new LinkedHashMap<>();
    Map map = new BeanMap(bean);
    Map> columns = getColumns(entity);
    // populate in column order
    for (Map.Entry> entry : columns.entrySet()) {
      Path path = entry.getValue();
      if (map.containsKey(entry.getKey())) {
        Object value = map.get(entry.getKey());
        if (value != null) {
          values.put(path, value);
        } else if (withNullBindings && !isPrimaryKeyColumn(entity, path)) {
          values.put(path, Null.DEFAULT);
        }
      }
    }
    return values;
  }
}
    
    
    
    

    




    
    
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