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/*
 * 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 io.trino.sql.tree;

import java.util.List;
import java.util.Objects;

import static com.google.common.base.MoreObjects.toStringHelper;
import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;

public class SubsetDefinition
        extends Node
{
    private final Identifier name;
    private final List identifiers;

    public SubsetDefinition(NodeLocation location, Identifier name, List identifiers)
    {
        super(location);
        this.name = requireNonNull(name, "name is null");
        requireNonNull(identifiers, "identifiers is null");
        checkArgument(!identifiers.isEmpty(), "identifiers is empty");
        this.identifiers = identifiers;
    }

    public Identifier getName()
    {
        return name;
    }

    public List getIdentifiers()
    {
        return identifiers;
    }

    @Override
    public  R accept(AstVisitor visitor, C context)
    {
        return visitor.visitSubsetDefinition(this, context);
    }

    @Override
    public List getChildren()
    {
        return identifiers;
    }

    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("name", name)
                .add("identifiers", identifiers)
                .toString();
    }

    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        SubsetDefinition that = (SubsetDefinition) o;
        return Objects.equals(name, that.name) &&
                Objects.equals(identifiers, that.identifiers);
    }

    @Override
    public int hashCode()
    {
        return Objects.hash(name, identifiers);
    }

    @Override
    public boolean shallowEquals(Node other)
    {
        if (!sameClass(this, other)) {
            return false;
        }

        return Objects.equals(name, ((SubsetDefinition) other).name);
    }
}