/*
 * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

package vm.mlvm.meth.share.transform.v2;

import java.lang.reflect.Array;

import vm.mlvm.meth.share.Argument;

public class MHArrayEnvelopeTFPair extends MHEnvelopeArgTFPair {

    public MHArrayEnvelopeTFPair(MHCall outboundTarget, int argNum, int arrayIdx, int arraySize) {
        super(outboundTarget,
              "ArrayGetSet_" + outboundTarget.hashCode(),
              argNum,
              getLocatorArg(arrayIdx),
              getEnvelopeArg(outboundTarget.getArgs()[argNum], arrayIdx, arraySize));

        if ( arrayIdx > arraySize )
            throw new IllegalArgumentException("Array index [" + arrayIdx + "] should be less than array size [" + arraySize + "]");
    }

    private static Argument getLocatorArg(int arrayIdx) {
        return new Argument(int.class, arrayIdx);
    }

    private static Argument getEnvelopeArg(Argument componentArg, int arrayIdx, int arraySize) {
        Object array = Array.newInstance(componentArg.getType(), arraySize);
        Array.set(array, arrayIdx, componentArg.getValue());
        return new Argument(array.getClass(), array);
    }

    @Override
    protected MHTF computeGetTF(Argument envelopeArg, Argument envelopeLocatorArg) {
        return new MHArrayGetElemTF(envelopeArg, envelopeLocatorArg);
    }

    @Override
    protected MHTF computeSetTF(Argument envelopeArg, Argument envelopeLocatorArg, Argument componentArg) {
        return new MHArraySetElemTF(envelopeArg, envelopeLocatorArg, componentArg);
    }

}