/*
* 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 Delete
extends Statement
{
private final Table table;
private final Optional<Expression> where;
public Delete(Table table, Optional<Expression> where)
{
this(Optional.empty(), table, where);
}
public Delete(NodeLocation location, Table table, Optional<Expression> where)
{
this(Optional.of(location), table, where);
}
private Delete(Optional<NodeLocation> location, Table table, Optional<Expression> where)
{
super(location);
this.table = requireNonNull(table, "table is null");
this.where = requireNonNull(where, "where is null");
}
public Table getTable()
{
return table;
}
public Optional<Expression> getWhere()
{
return where;
}
@Override
public <R, C> R accept(AstVisitor<R, C> visitor, C context)
{
return visitor.visitDelete(this, context);
}
@Override
public List<Node> getChildren()
{
ImmutableList.Builder<Node> nodes = ImmutableList.builder();
nodes.add(table);
where.ifPresent(nodes::add);
return nodes.build();
}
@Override
public int hashCode()
{
return Objects.hash(table, where);
}
@Override
public boolean equals(Object obj)
{
if (this == obj) {
return true;
}
if ((obj == null) || (getClass() != obj.getClass())) {
return false;
}
Delete o = (Delete) obj;
return Objects.equals(table, o.table) &&
Objects.equals(where, o.where);
}
@Override
public String toString()
{
return toStringHelper(this)
.add("table", table.getName())
.add("where", where)
.toString();
}
}