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package protobuf4j.orm.sql.expr;

import lombok.Data;
import org.apache.commons.lang3.StringUtils;
import protobuf4j.orm.sql.ISqlOperator;
import protobuf4j.orm.sql.ISqlValue;

import javax.annotation.Nonnull;
import java.util.List;

import static com.google.common.base.Preconditions.*;

/**
 * 表列
 * 
 *
 * author: yuanwq
 * date: 2018/7/11
 */
@Data
public class Column extends AbstractExpression {
  private final String column;

  private Column(String column) {
    checkArgument(StringUtils.isNotBlank(column));
    this.column = column;
  }

  public static Column of(String column) {
    return new Column(column);
  }

  @Override
  public int comparePrecedence(@Nonnull ISqlOperator outerOp) {
    return 1;
  }

  @Override
  public StringBuilder toSqlTemplate(@Nonnull StringBuilder sb) {
    return sb.append(column);
  }

  @Override
  public StringBuilder toSolidSql(@Nonnull StringBuilder sb) {
    return sb.append(column);
  }

  @Override
  public List collectSqlValue(@Nonnull List sqlValues) {
    return sqlValues;
  }

}