/*
 * Licensed to Crate under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.  Crate licenses this file
 * to you 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.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial
 * agreement.
 */

package io.crate.sql.tree;

import static com.google.common.base.Preconditions.checkNotNull;

public class TryCast extends Expression {
    private final Expression expression;
    private final ColumnType type;

    public TryCast(Expression expression, ColumnType type) {
        checkNotNull(expression, "expression is null");
        checkNotNull(type, "type is null");

        this.expression = expression;
        this.type = type;
    }

    public Expression getExpression() {
        return expression;
    }

    public ColumnType getType() {
        return type;
    }

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

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

        TryCast cast = (TryCast) o;

        if (!expression.equals(cast.expression)) {
            return false;
        }
        if (!type.equals(cast.type)) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        int result = expression.hashCode();
        result = 31 * result + type.hashCode();
        return result;
    }
}