content: package com.lidroid.xutils.db.table;
  
  import android.database.Cursor;
  import com.lidroid.xutils.db.sqlite.ColumnDbType;
  import com.lidroid.xutils.db.sqlite.FinderLazyLoader;
  import com.lidroid.xutils.exception.DbException;
  import com.lidroid.xutils.util.LogUtils;
  
  import java.lang.reflect.Field;
  import java.util.List;
  
  /**
   * Author: wyouflf
   * Date: 13-9-10
   * Time: 下午7:43
   */
  public class Finder extends Column {
  
      private final String valueColumnName;
      private final String targetColumnName;
  
      /* package */ Finder(Class<?> entityType, Field field) {
          super(entityType, field);
  
          com.lidroid.xutils.db.annotation.Finder finder =
                  field.getAnnotation(com.lidroid.xutils.db.annotation.Finder.class);
          this.valueColumnName = finder.valueColumn();
          this.targetColumnName = finder.targetColumn();
      }
  
      public Class<?> getTargetEntityType() {
          return ColumnUtils.getFinderTargetEntityType(this);
      }
  
      public String getTargetColumnName() {
          return targetColumnName;
      }
  
      @Override
      public void setValue2Entity(Object entity, Cursor cursor, int index) {
          Object value = null;
          Class<?> columnType = columnField.getType();
          Object finderValue = TableUtils.getColumnOrId(entity.getClass(), this.valueColumnName).getColumnValue(entity);
          if (columnType.equals(FinderLazyLoader.class)) {
              value = new FinderLazyLoader(this, finderValue);
          } else if (columnType.equals(List.class)) {
              try {
                  value = new FinderLazyLoader(this, finderValue).getAllFromDb();
              } catch (DbException e) {
                  LogUtils.e(e.getMessage(), e);
              }
          } else {
              try {
                  value = new FinderLazyLoader(this, finderValue).getFirstFromDb();
              } catch (DbException e) {
                  LogUtils.e(e.getMessage(), e);
              }
          }
  
          if (setMethod != null) {
              try {
                  setMethod.invoke(entity, value);
              } catch (Throwable e) {
                  LogUtils.e(e.getMessage(), e);
              }
          } else {
              try {
                  this.columnField.setAccessible(true);
                  this.columnField.set(entity, value);
              } catch (Throwable e) {
                  LogUtils.e(e.getMessage(), e);
              }
          }
      }
  
      @Override
      public Object getColumnValue(Object entity) {
          return null;
      }
  
      @Override
      public Object getDefaultValue() {
          return null;
      }
  
      @Override
      public ColumnDbType getColumnDbType() {
          return ColumnDbType.TEXT;
      }
  }
  