package edu.uci.ics.hivesterix.logical.plan.visitor.base;

import org.apache.commons.lang3.mutable.Mutable;
import org.apache.hadoop.hive.ql.exec.CollectOperator;
import org.apache.hadoop.hive.ql.exec.ExtractOperator;
import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
import org.apache.hadoop.hive.ql.exec.FilterOperator;
import org.apache.hadoop.hive.ql.exec.ForwardOperator;
import org.apache.hadoop.hive.ql.exec.GroupByOperator;
import org.apache.hadoop.hive.ql.exec.JoinOperator;
import org.apache.hadoop.hive.ql.exec.LateralViewForwardOperator;
import org.apache.hadoop.hive.ql.exec.LateralViewJoinOperator;
import org.apache.hadoop.hive.ql.exec.LimitOperator;
import org.apache.hadoop.hive.ql.exec.MapJoinOperator;
import org.apache.hadoop.hive.ql.exec.MapOperator;
import org.apache.hadoop.hive.ql.exec.ReduceSinkOperator;
import org.apache.hadoop.hive.ql.exec.SMBMapJoinOperator;
import org.apache.hadoop.hive.ql.exec.ScriptOperator;
import org.apache.hadoop.hive.ql.exec.SelectOperator;
import org.apache.hadoop.hive.ql.exec.TableScanOperator;
import org.apache.hadoop.hive.ql.exec.UDTFOperator;
import org.apache.hadoop.hive.ql.exec.UnionOperator;

import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalOperator;

/**
 * a default empty implementation of visitor
 * 
 * @author yingyib
 */
public class DefaultVisitor implements Visitor {

	@Override
	public Mutable<ILogicalOperator> visit(CollectOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(JoinOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(ExtractOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(MapJoinOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(SMBMapJoinOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	public Mutable<ILogicalOperator> visit(FileSinkOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	public Mutable<ILogicalOperator> visit(ReduceSinkOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(FilterOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(ForwardOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(GroupByOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(
			LateralViewForwardOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(
			LateralViewJoinOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(LimitOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(MapOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(ScriptOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(SelectOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(TableScanOperator hiveOperator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(UDTFOperator operator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}

	@Override
	public Mutable<ILogicalOperator> visit(UnionOperator operator,
			Mutable<ILogicalOperator> AlgebricksParentOperator, Translator t)
			throws AlgebricksException {
		return null;
	}
}