/*
* 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.relational;
import com.facebook.presto.spi.type.Type;
import com.fasterxml.jackson.annotation.JsonProperty;
import java.util.Objects;
import static java.util.Objects.requireNonNull;
public final class InputReferenceExpression
extends RowExpression
{
private final int field;
private final Type type;
public InputReferenceExpression(int field, Type type)
{
requireNonNull(type, "type is null");
this.field = field;
this.type = type;
}
@JsonProperty
public int getField()
{
return field;
}
@Override
@JsonProperty
public Type getType()
{
return type;
}
@Override
public int hashCode()
{
return Objects.hash(field, type);
}
@Override
public String toString()
{
return "#" + field;
}
@Override
public <C, R> R accept(RowExpressionVisitor<C, R> visitor, C context)
{
return visitor.visitInputReference(this, context);
}
@Override
public boolean equals(Object obj)
{
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
InputReferenceExpression other = (InputReferenceExpression) obj;
return Objects.equals(this.field, other.field) && Objects.equals(this.type, other.type);
}
}