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/*
 * Copyright 2010-2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.amazonaws.jmespath;

import com.fasterxml.jackson.databind.JsonNode;

/**
 * Implements not-equal-to comparison on different expressions
 */
public class OpNotEquals extends Comparator {

    public OpNotEquals(JmesPathExpression lhsExpr, JmesPathExpression rhsExpr) {
        super(lhsExpr, rhsExpr);
    }

    /**
     * Delegates to either the CodeGen visitor(Comparator) or
     * Evaluation visitor(Comparator) based on the type of JmesPath
     * visitor
     *
     * @param visitor  CodeGen visitor or Evaluation visitor
     * @param input    Input expression that needs to be evaluated
     * @param   Input type for the visitor
     *                 CodeGen visitor: Void
     *                 Evaluation visitor: JsonNode
     * @param  Output type for the visitor
     *                 CodeGen visitor: String
     *                 Evaluation visitor: JsonNode
     * @return Corresponding output is returned. Evaluated String
     * in the case of CodeGen visitor or an evaluated JsonNode
     * in the case of Evaluation visitor
     * @throws InvalidTypeException
     */
    @Override
    public  Output accept(JmesPathVisitor visitor, Input input) throws InvalidTypeException {
        return visitor.visit(this, input);
    }

    /**
     * Checks whether lhs is not equal to rhs
     *
     * @param lhs Lhs expression
     * @param rhs Rhs expression
     * @return True if lhs is not equal to rhs;
     * False otherwise
     */
    @Override
    public boolean matches(JsonNode lhs, JsonNode rhs) {
        return !lhs.equals(rhs);
    }
}