/*
* 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 java.util.Objects;
import static java.util.Objects.requireNonNull;
public final class ConstantExpression
extends RowExpression
{
private final Object value;
private final Type type;
public ConstantExpression(Object value, Type type)
{
requireNonNull(type, "type is null");
this.value = value;
this.type = type;
}
public Object getValue()
{
return value;
}
@Override
public Type getType()
{
return type;
}
@Override
public String toString()
{
return String.valueOf(value);
}
@Override
public int hashCode()
{
return Objects.hash(value, type);
}
@Override
public boolean equals(Object obj)
{
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
ConstantExpression other = (ConstantExpression) obj;
return Objects.equals(this.value, other.value) && Objects.equals(this.type, other.type);
}
@Override
public <C, R> R accept(RowExpressionVisitor<C, R> visitor, C context)
{
return visitor.visitConstant(this, context);
}
}