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package org.vertexium;

import java.lang.reflect.Method;
import java.util.Map;

public class GraphFactory {
    public Graph createGraph(Map config) {
        String graphClassName = config.get("");
        if (graphClassName == null || graphClassName.length() == 0) {
            throw new VertexiumException("missing graph configuration class");
        }
        try {
            Class graphClass = Class.forName(graphClassName);
            try {
                @SuppressWarnings("unchecked")
                Method createMethod = graphClass.getDeclaredMethod("create", Map.class);
                try {
                    return (Graph) createMethod.invoke(null, config);
                } catch (Exception e) {
                    throw new VertexiumException("Failed on " + createMethod + " on class " + graphClass.getName(), e);
                }
            } catch (NoSuchMethodException e) {
                throw new VertexiumException("Could not find create(java.lang.Map) method on class " + graphClass.getName(), e);
            }
        } catch (ClassNotFoundException e) {
            throw new VertexiumException("Could not find class: " + graphClassName, e);
        }
    }
}