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    • com.querydsl.sql.dml.AnnotationMapper 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.QueryException;
import com.querydsl.core.types.Path;
import com.querydsl.core.util.ReflectionUtils;
import com.querydsl.sql.Column;
import com.querydsl.sql.ColumnMetadata;
import com.querydsl.sql.RelationalPath;
import com.querydsl.sql.types.Null;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;

/**
 * Creates the mapping via @Column annotated fields in the object. Field names don't have to match
 * those in the RelationalPath.
 *
 * @author tiwe
 */
public class AnnotationMapper implements Mapper {

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

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

  private final boolean withNullBindings;

  public AnnotationMapper() {
    this(false);
  }

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

  @Override
  public Map, Object> createMap(RelationalPath path, Object object) {
    try {
      Map> columnToPath = new HashMap>();
      for (Path column : path.getColumns()) {
        columnToPath.put(ColumnMetadata.getName(column), column);
      }
      Map, Object> values = new HashMap, Object>();
      for (Field field : ReflectionUtils.getFields(object.getClass())) {
        Column ann = field.getAnnotation(Column.class);
        if (ann != null) {
          field.setAccessible(true);
          Object propertyValue = field.get(object);
          if (propertyValue != null) {
            if (columnToPath.containsKey(ann.value())) {
              values.put(columnToPath.get(ann.value()), propertyValue);
            }
          } else if (withNullBindings) {
            values.put(columnToPath.get(ann.value()), Null.DEFAULT);
          }
        }
      }
      return values;
    } catch (IllegalAccessException e) {
      throw new QueryException(e);
    }
  }
}
    
    
    
    

    




    
    
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