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.reflect.Array; 29 30 import vm.mlvm.meth.share.Argument; 31 32 public class MHArrayGetElemTF extends MHNullaryTF { 33 34 private final Argument arrayArg; 35 private final Argument idxArg; 36 private final int idx; 37 38 public MHArrayGetElemTF(Argument array, Argument idxArg) { 39 this.arrayArg = array; 40 this.idxArg = idxArg; 41 this.idx = (Integer) idxArg.getValue(); 42 } 43 44 @Override 45 protected void check() throws IllegalArgumentException { 46 if ( ! this.arrayArg.getType().isArray() ) 47 throw new IllegalArgumentException("Argument " + this.arrayArg + " should be an array!"); 48 49 if ( ! this.idxArg.getType().equals(int.class) ) 50 throw new IllegalArgumentException("Argument " + this.idxArg + " should be of type int!"); 51 52 if ( this.idx < 0 || this.idx >= Array.getLength(this.arrayArg.getValue()) ) 53 throw new IllegalArgumentException("Index " + this.idxArg + " is out of bounds for array " + this.arrayArg); 54 } 55 56 @Override 57 protected Argument computeRetVal() { 58 return new Argument(this.arrayArg.getType().getComponentType(), Array.get(this.arrayArg.getValue(), idx)); 59 } 60 61 @Override 62 protected Argument[] computeInboundArgs() { 63 return new Argument[] { arrayArg, idxArg }; 64 } 65 66 @Override 67 protected MethodHandle computeInboundMH() { 68 return MethodHandles.arrayElementGetter(this.arrayArg.getType()); 69 } 70 71 @Override 72 protected String getName() { 73 return "arrayElementGetter"; 74 } 75 76 @Override 77 protected String getDescription() { 78 return "array=" + this.arrayArg + "; idx=" + this.idxArg; 79 } 80 }