RubiniusPrimitiveManager.java

/*
 * Copyright (c) 2015 Oracle and/or its affiliates. All rights reserved. This
 * code is released under a tri EPL/GPL/LGPL license. You can use it,
 * redistribute it and/or modify it under the terms of the:
 *
 * Eclipse Public License version 1.0
 * GNU General Public License version 2
 * GNU Lesser General Public License version 2.1
 */
package org.jruby.truffle.nodes.rubinius;

import com.oracle.truffle.api.dsl.GeneratedBy;
import com.oracle.truffle.api.dsl.NodeFactory;
import org.jruby.truffle.nodes.RubyNode;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Manages the available Rubinius primitive calls.
 */
public class RubiniusPrimitiveManager {

    private final Map<String, RubiniusPrimitiveConstructor> primitives;

    private RubiniusPrimitiveManager(Map<String, RubiniusPrimitiveConstructor> primitives) {
        this.primitives = primitives;
    }

    public RubiniusPrimitiveConstructor getPrimitive(String name) {
        final RubiniusPrimitiveConstructor constructor = primitives.get(name);

        if (constructor == null) {
            throw new RuntimeException(String.format("Rubinius primitive %s not found", name));
        }

        return constructor;
    }

    public static RubiniusPrimitiveManager create() {
        final List<NodeFactory<? extends RubyNode>> nodeFactories = new ArrayList<>();

        nodeFactories.addAll(TimePrimitiveNodesFactory.getFactories());
        nodeFactories.addAll(TypePrimitiveNodesFactory.getFactories());
        nodeFactories.addAll(StringPrimitiveNodesFactory.getFactories());

        final Map<String, RubiniusPrimitiveConstructor> primitives = new HashMap<>();

        for (NodeFactory<? extends RubyNode> nodeFactory : nodeFactories) {
            final GeneratedBy generatedBy = nodeFactory.getClass().getAnnotation(GeneratedBy.class);
            final Class<?> nodeClass = generatedBy.value();
            final RubiniusPrimitive annotation = nodeClass.getAnnotation(RubiniusPrimitive.class);
            primitives.put(annotation.name(), new RubiniusPrimitiveConstructor(annotation, nodeFactory));
        }

        return new RubiniusPrimitiveManager(primitives);
    }

}