/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j 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 <http://www.gnu.org/licenses/>.
 */
package org.neo4j.cypher.internal.javacompat;

import java.util.HashMap;
import java.util.Map;
import java.util.NoSuchElementException;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Path;
import org.neo4j.graphdb.Relationship;
import org.neo4j.graphdb.Result;

public class ResultRowImpl implements Result.ResultRow {
    private final Map<String, Object> results;

    public ResultRowImpl(Map<String, Object> results) {
        this.results = results;
    }

    public ResultRowImpl() {
        this(new HashMap<>());
    }

    public void set(String k, Object value) {
        results.put(k, value);
    }

    @Override
    public Object get(String key) {
        return get(key, Object.class);
    }

    @Override
    public Node getNode(String key) {
        return get(key, Node.class);
    }

    @Override
    public Relationship getRelationship(String key) {
        return get(key, Relationship.class);
    }

    @Override
    public String getString(String key) {
        return get(key, String.class);
    }

    @Override
    public Number getNumber(String key) {
        return get(key, Number.class);
    }

    @Override
    public Boolean getBoolean(String key) {
        return get(key, Boolean.class);
    }

    @Override
    public Path getPath(String key) {
        return get(key, Path.class);
    }

    private <T> T get(String key, Class<T> type) {
        Object value = results.get(key);
        if (value == null && !results.containsKey(key)) {
            throw new IllegalArgumentException("No column \"" + key + "\" exists");
        }
        try {
            return type.cast(value);
        } catch (ClassCastException e) {
            String message = String.format(
                    "The current item in column \"%s\" is not a %s; it's \"%s\"", key, type.getSimpleName(), value);
            throw new NoSuchElementException(message);
        }
    }
}
