/*
* 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.metadata.Signature;
import com.facebook.presto.spi.type.Type;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import java.util.List;
import java.util.Objects;
import static java.util.Objects.requireNonNull;
public final class CallExpression
extends RowExpression
{
private final Signature signature;
private final Type returnType;
private final List<RowExpression> arguments;
public CallExpression(Signature signature, Type returnType, List<RowExpression> arguments)
{
requireNonNull(signature, "signature is null");
requireNonNull(arguments, "arguments is null");
requireNonNull(returnType, "returnType is null");
this.signature = signature;
this.returnType = returnType;
this.arguments = ImmutableList.copyOf(arguments);
}
public Signature getSignature()
{
return signature;
}
@Override
public Type getType()
{
return returnType;
}
public List<RowExpression> getArguments()
{
return arguments;
}
@Override
public String toString()
{
return signature.getName() + "(" + Joiner.on(", ").join(arguments) + ")";
}
@Override
public int hashCode()
{
return Objects.hash(signature, arguments);
}
@Override
public boolean equals(Object obj)
{
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
CallExpression other = (CallExpression) obj;
return Objects.equals(this.signature, other.signature) && Objects.equals(this.arguments, other.arguments);
}
@Override
public <C, R> R accept(RowExpressionVisitor<C, R> visitor, C context)
{
return visitor.visitCall(this, context);
}
}