com.oracle.truffle.js.runtime.interop.InteropBoundFunction Maven / Gradle / Ivy

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 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
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 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (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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package com.oracle.truffle.js.runtime.interop;

import java.util.Objects;

import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.ImportStatic;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.UnsupportedMessageException;
import com.oracle.truffle.api.library.CachedLibrary;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;
import com.oracle.truffle.js.lang.JavaScriptLanguage;
import com.oracle.truffle.js.nodes.interop.ExportValueNode;
import com.oracle.truffle.js.nodes.interop.JSInteropExecuteNode;
import com.oracle.truffle.js.runtime.JSConfig;
import com.oracle.truffle.js.runtime.JSRealm;
import com.oracle.truffle.js.runtime.builtins.JSFunctionObject;

@ImportStatic({JSConfig.class})
@ExportLibrary(value = InteropLibrary.class, delegateTo = "function")
public final class InteropBoundFunction extends InteropFunction {

    final JSFunctionObject function;
    final Object receiver;

    public InteropBoundFunction(JSFunctionObject function, Object receiver) {
        super(function);
        this.function = function;
        this.receiver = receiver;
    }

    public Object getReceiver() {
        return receiver;
    }

    @Override
    public int hashCode() {
        int result;
        result = 31 + ((function == null) ? 0 : function.hashCode());
        result = 31 * result + ((receiver == null) ? 0 : receiver.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        } else if (obj instanceof InteropBoundFunction) {
            InteropBoundFunction other = (InteropBoundFunction) obj;
            return Objects.equals(function, other.function) && Objects.equals(receiver, other.receiver);
        } else {
            return false;
        }
    }

    @SuppressWarnings("static-method")
    @ExportMessage
    boolean isExecutable() {
        return true;
    }

    @ExportMessage
    Object execute(Object[] arguments,
                    @CachedLibrary("this") InteropLibrary self,
                    @Cached JSInteropExecuteNode callNode,
                    @Cached ExportValueNode exportNode) throws UnsupportedMessageException {
        JavaScriptLanguage language = JavaScriptLanguage.get(self);
        JSRealm realm = JSRealm.get(self);
        language.interopBoundaryEnter(realm);
        try {
            Object result = callNode.execute(function, receiver, arguments);
            return exportNode.execute(result);
        } finally {
            language.interopBoundaryExit(realm);
        }
    }
}