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 29 import vm.mlvm.meth.share.Argument; 30 31 public class MHIdentityTF extends MHNullaryTF { 32 33 private final Argument _arg; 34 35 public MHIdentityTF(Argument arg) { 36 _arg = arg; 37 } 38 39 @Override 40 protected void check() throws IllegalArgumentException { 41 } 42 43 @Override 44 protected Argument computeRetVal() { 45 return _arg; 46 } 47 48 @Override 49 protected Argument[] computeInboundArgs() { 50 return new Argument[] { _arg }; 51 } 52 53 @Override 54 protected MethodHandle computeInboundMH() { 55 return MethodHandles.identity(_arg.getType()); 56 } 57 58 @Override 59 protected String getName() { 60 return "identity"; 61 } 62 63 @Override 64 protected String getDescription() { 65 return "arg=" + _arg; 66 } 67 68 }