/*
* 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.facebook.presto.sql.tree;
import com.google.common.collect.ImmutableList;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import static com.google.common.base.MoreObjects.toStringHelper;
import static java.util.Objects.requireNonNull;
public class Query
extends Statement
{
private final Optional<With> with;
private final QueryBody queryBody;
private final Optional<OrderBy> orderBy;
private final Optional<String> limit;
public Query(
Optional<With> with,
QueryBody queryBody,
Optional<OrderBy> orderBy,
Optional<String> limit)
{
this(Optional.empty(), with, queryBody, orderBy, limit);
}
public Query(
NodeLocation location,
Optional<With> with,
QueryBody queryBody,
Optional<OrderBy> orderBy,
Optional<String> limit)
{
this(Optional.of(location), with, queryBody, orderBy, limit);
}
private Query(
Optional<NodeLocation> location,
Optional<With> with,
QueryBody queryBody,
Optional<OrderBy> orderBy,
Optional<String> limit)
{
super(location);
requireNonNull(with, "with is null");
requireNonNull(queryBody, "queryBody is null");
requireNonNull(orderBy, "orderBy is null");
requireNonNull(limit, "limit is null");
this.with = with;
this.queryBody = queryBody;
this.orderBy = orderBy;
this.limit = limit;
}
public Optional<With> getWith()
{
return with;
}
public QueryBody getQueryBody()
{
return queryBody;
}
public Optional<OrderBy> getOrderBy()
{
return orderBy;
}
public Optional<String> getLimit()
{
return limit;
}
@Override
public <R, C> R accept(AstVisitor<R, C> visitor, C context)
{
return visitor.visitQuery(this, context);
}
@Override
public List<Node> getChildren()
{
ImmutableList.Builder<Node> nodes = ImmutableList.builder();
with.ifPresent(nodes::add);
nodes.add(queryBody);
orderBy.ifPresent(nodes::add);
return nodes.build();
}
@Override
public String toString()
{
return toStringHelper(this)
.add("with", with.orElse(null))
.add("queryBody", queryBody)
.add("orderBy", orderBy)
.add("limit", limit.orElse(null))
.omitNullValues()
.toString();
}
@Override
public boolean equals(Object obj)
{
if (this == obj) {
return true;
}
if ((obj == null) || (getClass() != obj.getClass())) {
return false;
}
Query o = (Query) obj;
return Objects.equals(with, o.with) &&
Objects.equals(queryBody, o.queryBody) &&
Objects.equals(orderBy, o.orderBy) &&
Objects.equals(limit, o.limit);
}
@Override
public int hashCode()
{
return Objects.hash(with, queryBody, orderBy, limit);
}
}