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A Cyber Threat Intelligence (CTI) STIX v2.1 pattern compiler and expression evaluator

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/*
 * stix-pattern-evaluator
 * Copyright (C) 2020 - Christopher Carver
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package design.unstructured.stix.evaluator;

import org.antlr.v4.runtime.tree.TerminalNode;

/**
 *
 * @author ccarv
 */
public class ComparisonExpression extends BaseComparisonExpression implements ExpressionEvaluator {

    private final String objectPath;

    private final Object value;

    private final ComparisonComparators comparator;

    private final TerminalNode negated;

    private Boolean evaluation = null;

    ComparisonExpression(String objectPath, Object value, ComparisonComparators comparator, TerminalNode negated) {
        this.objectPath = objectPath;
        this.value = value;
        this.comparator = comparator;
        this.negated = negated;
    }

    /**
     * @return the objectPath
     */
    public String getObjectPath() {
        return objectPath;
    }

    /**
     * @return the value
     */
    public Object getValue() {
        return value;
    }

    /**
     * @return the comparator
     */
    public ComparisonComparators getComparator() {
        return comparator;
    }

    /**
     * @return the negated
     */
    public TerminalNode isNegated() {
        return negated;
    }

    public void setEvaluation(Boolean value) {
        evaluation = value;
    }

    @Override
    public boolean evaluate() {
        return evaluation;
    }

    @Override
    public String toString() {
        return "ComparisonExpression(" + this.getObjectPath() + ", " + this.getComparator() + ", " + this.getValue()
                + ")";
    }

}