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/**
 *    Copyright 2013 MegaFon
 *
 *    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 ru.histone.evaluator.functions.node.object;

import ru.histone.evaluator.functions.node.NodeFunction;
import ru.histone.evaluator.nodes.Node;
import ru.histone.evaluator.nodes.NodeFactory;
import ru.histone.evaluator.nodes.ObjectHistoneNode;

/**
 * Check if target object has property with specified key name
 */
public class HasKey extends NodeFunction {

    public HasKey(NodeFactory nodeFactory) {
        super(nodeFactory);
    }

    @Override
    public String getName() {
        return "hasKey";
    }

    @Override
    public Node execute(ObjectHistoneNode target, Node... args) {
        if (args.length > 0) {
            String key = args[0].getAsString().getValue();
            return target.hasProp(key) ? getNodeFactory().TRUE : getNodeFactory().FALSE;
        }
        return getNodeFactory().UNDEFINED;
    }
}