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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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package com.oracle.truffle.polyglot;

import java.util.function.Function;
import java.util.function.Predicate;

import org.graalvm.polyglot.HostAccess.TargetMappingPrecedence;

final class PolyglotTargetMapping implements Comparable {

    final Class sourceType;
    final Class targetType;
    final Predicate accepts;
    final Function converter;
    final int hostPriority;

    @SuppressWarnings("unchecked")
     PolyglotTargetMapping(Class sourceType, Class targetType, Predicate accepts, Function converter, TargetMappingPrecedence precedence) {
        this.sourceType = (Class) sourceType;
        this.targetType = (Class) targetType;
        this.accepts = (Predicate) accepts;
        this.converter = (Function) converter;
        this.hostPriority = toHostPriority(precedence);
    }

    private static int toHostPriority(TargetMappingPrecedence p) {
        switch (p) {
            case HIGHEST:
                return ToHostNode.HIGHEST;
            case HIGH:
                return ToHostNode.STRICT;
            case LOW:
                return ToHostNode.LOOSE;
            case LOWEST:
                return ToHostNode.LOWEST;
            default:
                throw new AssertionError("invalid precedence");
        }
    }

    public int compareTo(PolyglotTargetMapping o) {
        return Integer.compare(hostPriority, o.hostPriority);
    }

}
    

    

    

            

    

            



    
    






    
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