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RESTHeart MongoDB - GraphQL plugin
There is a newer version: 8.1.5
/*-
 * ========================LICENSE_START=================================
 * restheart-security
 * %%
 * Copyright (C) 2018 - 2024 SoftInstigate
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License
 * along with this program.  If not, see .
 * =========================LICENSE_END==================================
 */
package org.restheart.graphql.predicates;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.apache.commons.jxpath.JXPathContext;
import org.bson.BsonValue;
import org.restheart.utils.BsonUtils;

import io.undertow.predicate.Predicate;
import io.undertow.predicate.PredicateBuilder;

/**
 * a predicate that resolve to true if the request contains the specified keys
 */
public class FieldEqPredicate implements PredicateOverJxPathCtx {
    private final String key;
    private final BsonValue value;

    public FieldEqPredicate(String key, String value) {
        if (key == null || value == null) {
            throw new IllegalArgumentException("field-eq predicate must specify the field and the value");
        }

        this.key = key;
        this.value = BsonUtils.parse(value);
    }

    @Override
    public boolean resolve(JXPathContext ctx) {
        var _v = BsonUtils.get(ctx, key);

        if (_v.isPresent()) {
            return this.value.equals(_v.get());
        } else {
            return false;
        }
    }

    public static class Builder implements PredicateBuilder {
        @Override
        public String name() {
            return "field-eq";
        }

        @Override
        public Map> parameters() {
            var params = new HashMap>();
            params.put("field", String.class);
            params.put("value", String.class);
            return params;
        }

        @Override
        public Set requiredParameters() {
            var params = new HashSet();
            params.add("field");
            params.add("value");
            return params;
        }

        @Override
        public String defaultParameter() {
            return "field";
        }

        @Override
        public Predicate build(Map config) {
            return new FieldEqPredicate((String) config.get("field"), (String) config.get("value"));
        }
    }
}