1 /*
   2  * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package vm.mlvm.meth.share.transform.v2;
  25 
  26 import java.lang.invoke.MethodHandle;
  27 import java.lang.invoke.MethodHandles;
  28 import java.lang.invoke.WrongMethodTypeException;
  29 import java.util.Arrays;
  30 
  31 import nsk.share.test.TestUtils;
  32 import vm.mlvm.meth.share.Argument;
  33 import vm.mlvm.meth.share.Arguments;
  34 import vm.mlvm.meth.share.MHUtils;
  35 
  36 public class MHInsertTF extends MHInsertOrDropTF {
  37 
  38     protected final boolean _canDropProtected;
  39 
  40     public MHInsertTF(MHCall target, int pos, Argument[] values, boolean canDropProtected) {
  41         super(target, pos, values);
  42         _canDropProtected = canDropProtected;
  43     }
  44 
  45     @Override
  46     protected void check(Argument[] targetArgs) throws IllegalArgumentException {
  47         super.check(targetArgs);
  48 
  49         for (int i = this.pos; i < Math.min(targetArgs.length, this.pos + this.values.length); i++) {
  50             if ( ! _canDropProtected && targetArgs[i].isPreserved() ) {
  51                 throw new WrongMethodTypeException("Dropping a protected argument #" + i
  52                                                  + ": " + targetArgs[i]);
  53 
  54             }
  55 
  56             MHUtils.assertAssignableType("argument " + i, targetArgs[i].getType(), this.values[i - this.pos].getType());
  57         }
  58     }
  59 
  60     @Override
  61     protected Argument[] computeInboundArgs(Argument[] targetArgs) {
  62         return TestUtils.concatArrays(
  63                 Arrays.copyOfRange(targetArgs, 0, this.pos),
  64                 Arrays.copyOfRange(targetArgs, this.pos + this.values.length, targetArgs.length));
  65     }
  66 
  67     @Override
  68     protected MethodHandle computeInboundMH(MethodHandle targetMH) {
  69         return MethodHandles.insertArguments(targetMH, this.pos, Arguments.valuesArray(this.values));
  70     }
  71 
  72     @Override
  73     protected String getName() {
  74         return "insertArguments";
  75     }
  76 
  77 }