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Truffle is a multi-language framework for executing dynamic languages that achieves high performance when combined with Graal.
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// CheckStyle: start generated
package com.oracle.truffle.host;

import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.dsl.GeneratedBy;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.library.DynamicDispatchLibrary;
import com.oracle.truffle.api.library.Library;
import com.oracle.truffle.api.library.LibraryExport;
import com.oracle.truffle.api.library.LibraryFactory;
import com.oracle.truffle.api.nodes.NodeCost;
import com.oracle.truffle.api.utilities.FinalBitSet;

@GeneratedBy(HostException.class)
final class HostExceptionGen {

    private static final LibraryFactory INTEROP_LIBRARY_ = LibraryFactory.resolve(InteropLibrary.class);
    private static final LibraryFactory DYNAMIC_DISPATCH_LIBRARY_ = LibraryFactory.resolve(DynamicDispatchLibrary.class);

    static  {
        LibraryExport.register(HostException.class, new InteropLibraryExports());
    }

    private HostExceptionGen() {
    }

    @GeneratedBy(HostException.class)
    private static final class InteropLibraryExports extends LibraryExport {

        static final FinalBitSet ENABLED_MESSAGES = createMessageBitSet(INTEROP_LIBRARY_);
        private static final Uncached UNCACHED = new Uncached();

        private InteropLibraryExports() {
            super(InteropLibrary.class, HostException.class, false, false, 0);
        }

        @Override
        protected InteropLibrary createUncached(Object receiver) {
            assert receiver instanceof HostException;
            InteropLibrary uncached = createDelegate(INTEROP_LIBRARY_, InteropLibraryExports.UNCACHED);
            return uncached;
        }

        @Override
        protected InteropLibrary createCached(Object receiver) {
            assert receiver instanceof HostException;
            return createDelegate(INTEROP_LIBRARY_, new Cached(receiver));
        }

        @GeneratedBy(HostException.class)
        private static final class Cached extends InteropLibrary implements DelegateExport {

            @Child private InteropLibrary receiverDelegateInteropLibrary_;

            protected Cached(Object receiver) {
                HostException castReceiver = ((HostException) receiver) ;
                this.receiverDelegateInteropLibrary_ = super.insert(INTEROP_LIBRARY_.create((castReceiver.delegate)));
            }

            @Override
            public FinalBitSet getDelegateExportMessages() {
                return ENABLED_MESSAGES;
            }

            @Override
            public Object readDelegateExport(Object receiver_) {
                return ((HostException) receiver_).delegate;
            }

            @Override
            public Library getDelegateExportLibrary(Object delegate) {
                return this.receiverDelegateInteropLibrary_;
            }

            @Override
            public boolean accepts(Object receiver) {
                assert !(receiver instanceof HostException) || DYNAMIC_DISPATCH_LIBRARY_.getUncached().dispatch(receiver) == null : "Invalid library export. Exported receiver with dynamic dispatch found but not expected.";
                if (!(receiver instanceof HostException)) {
                    return false;
                } else if (!this.receiverDelegateInteropLibrary_.accepts((((HostException) receiver).delegate))) {
                    return false;
                } else {
                    return true;
                }
            }

        }
        @GeneratedBy(HostException.class)
        private static final class Uncached extends InteropLibrary implements DelegateExport {

            protected Uncached() {
            }

            @Override
            public FinalBitSet getDelegateExportMessages() {
                return ENABLED_MESSAGES;
            }

            @Override
            public Object readDelegateExport(Object receiver_) {
                return (((HostException) receiver_)).delegate;
            }

            @Override
            public Library getDelegateExportLibrary(Object delegate_) {
                return INTEROP_LIBRARY_.getUncached(delegate_);
            }

            @Override
            @TruffleBoundary
            public boolean accepts(Object receiver) {
                assert !(receiver instanceof HostException) || DYNAMIC_DISPATCH_LIBRARY_.getUncached().dispatch(receiver) == null : "Invalid library export. Exported receiver with dynamic dispatch found but not expected.";
                return receiver instanceof HostException;
            }

            @Override
            public boolean isAdoptable() {
                return false;
            }

            @Override
            public NodeCost getCost() {
                return NodeCost.MEGAMORPHIC;
            }

        }
    }
}