root/trunk/ProjectFortress/src/com/sun/fortress/interpreter/evaluator/values/MethodClosureInstance.java

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package com.sun.fortress.interpreter.evaluator.values;

import java.util.List;

import com.sun.fortress.interpreter.evaluator.Environment;
import com.sun.fortress.interpreter.evaluator.types.FType;
import com.sun.fortress.nodes_util.Applicable;
import com.sun.fortress.useful.HasAt;

/**
 * A MethodClosureInstance is the result of instantiating an object generic method.
 * Its environment is unusual.
 * @author chase
 */
public class MethodClosureInstance extends MethodClosure implements MethodInstance {

    GenericMethod generator;
    Environment genericEnv;

    public MethodClosureInstance(Environment within, Environment genericEnv, Applicable fndef, FType definer, List<FType> args, GenericMethod generator) {
        super(within, fndef, definer, args);
        this.generator = generator;
        this.genericEnv = genericEnv;
        if (!genericEnv.getBlessed()) {
            System.out.println("Creating a MethodClosureInstance for "+fndef+args+
                               "with unblessed genericEnv "+genericEnv);
        }
    }

    public Environment getEvalEnv() {
        return genericEnv;
    }

    // The choice of evaluation environment is the only difference between applying
    // a MethodClosure and applying its subclass, a PartiallyDefinedMethod (which
    // appears to actually represent some piece of a functional method in practice).
    @Override
    protected Environment envForApplication(FObject selfValue, HasAt loc) {
        return selfValue.getLexicalEnv().genericLeafEnvHack(genericEnv, loc);
    }

    public GenericMethod getGenerator() {
        return generator;
    }

}