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 // TODO: cover widening/narrowing conversions 32 public class MHConstantTF extends MHNullaryTF { 33 34 protected final Argument retVal; 35 36 public MHConstantTF(Argument retVal) { 37 this.retVal = retVal; 38 } 39 40 @Override 41 protected void check() throws IllegalArgumentException { 42 } 43 44 @Override 45 protected Argument computeRetVal() { 46 return this.retVal; 47 } 48 49 @Override 50 protected Argument[] computeInboundArgs() { 51 return new Argument[0]; 52 } 53 54 @Override 55 protected MethodHandle computeInboundMH() throws NoSuchMethodException, IllegalAccessException { 56 return MethodHandles.constant(retVal.getType(), retVal.getValue()); 57 } 58 59 @Override 60 protected String getName() { 61 return "constant"; 62 } 63 64 @Override 65 protected String getDescription() { 66 return "retVal=" + retVal; 67 } 68 69 }