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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * The Universal Permissive License (UPL), Version 1.0
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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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 * This license is subject to the following condition:
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package com.oracle.truffle.sl.nodes.access;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.nodes.NodeInfo;
import com.oracle.truffle.api.source.SourceSection;
import com.oracle.truffle.api.utilities.ConditionProfile;
import com.oracle.truffle.sl.SLException;
import com.oracle.truffle.sl.nodes.SLExpressionNode;
import com.oracle.truffle.sl.runtime.SLContext;

/**
 * The node for accessing a property of an object. When executed, this node first evaluates the
 * object expression on the left side of the dot operator and then reads the named property.
 */
@NodeInfo(shortName = ".")
public final class SLReadPropertyNode extends SLExpressionNode {

    public static SLReadPropertyNode create(SourceSection src, SLExpressionNode receiverNode, String propertyName) {
        return new SLReadPropertyNode(src, receiverNode, propertyName);
    }

    @Child private SLExpressionNode receiverNode;
    @Child private SLReadPropertyCacheNode cacheNode;
    private final ConditionProfile receiverTypeCondition = ConditionProfile.createBinaryProfile();

    private SLReadPropertyNode(SourceSection src, SLExpressionNode receiverNode, String propertyName) {
        super(src);
        this.receiverNode = receiverNode;
        this.cacheNode = SLReadPropertyCacheNodeGen.create(propertyName);
    }

    @Override
    public Object executeGeneric(VirtualFrame frame) {
        Object object = receiverNode.executeGeneric(frame);
        if (receiverTypeCondition.profile(SLContext.isSLObject(object))) {
            return cacheNode.executeObject(SLContext.castSLObject(object));
        } else {
            CompilerDirectives.transferToInterpreter();
            throw new SLException("unexpected receiver type");
        }
    }
}