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/*
 * Copyright (c) 2013, 2017 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.language;

import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.instrumentation.Instrumentable;
import com.oracle.truffle.api.nodes.UnexpectedResultException;
import com.oracle.truffle.api.object.DynamicObject;

@Instrumentable(factory = RubyNodeWrapper.class)
public abstract class RubyNode extends RubyBaseNode {

    // Fundamental execute methods

    public abstract Object execute(VirtualFrame frame);

    public void executeVoid(VirtualFrame frame) {
        execute(frame);
    }

    public Object isDefined(VirtualFrame frame) {
        return coreStrings().EXPRESSION.createInstance();
    }

    // Utility methods to execute and expect a particular type

    public NotProvided executeNotProvided(VirtualFrame frame) throws UnexpectedResultException {
        final Object value = execute(frame);

        if (value instanceof NotProvided) {
            return (NotProvided) value;
        } else {
            throw new UnexpectedResultException(value);
        }
    }

    public boolean executeBoolean(VirtualFrame frame) throws UnexpectedResultException {
        final Object value = execute(frame);

        if (value instanceof Boolean) {
            return (boolean) value;
        } else {
            throw new UnexpectedResultException(value);
        }
    }

    public int executeInteger(VirtualFrame frame) throws UnexpectedResultException {
        final Object value = execute(frame);

        if (value instanceof Integer) {
            return (int) value;
        } else {
            throw new UnexpectedResultException(value);
        }
    }

    public long executeLong(VirtualFrame frame) throws UnexpectedResultException {
        final Object value = execute(frame);

        if (value instanceof Long) {
            return (long) value;
        } else {
            throw new UnexpectedResultException(value);
        }
    }

    public double executeDouble(VirtualFrame frame) throws UnexpectedResultException {
        final Object value = execute(frame);

        if (value instanceof Double) {
            return (double) value;
        } else {
            throw new UnexpectedResultException(value);
        }
    }

    public DynamicObject executeDynamicObject(VirtualFrame frame) throws UnexpectedResultException {
        final Object value = execute(frame);

        if (value instanceof DynamicObject) {
            return (DynamicObject) value;
        } else {
            throw new UnexpectedResultException(value);
        }
    }

    public Object[] executeObjectArray(VirtualFrame frame) throws UnexpectedResultException {
        final Object value = execute(frame);

        if (value.getClass() == Object[].class) {
            return (Object[]) value;
        } else {
            throw new UnexpectedResultException(value);
        }
    }

}