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.MethodType; 29 30 public class MHSamTF extends MHBasicUnaryTF { 31 32 public static interface SAM { 33 public Object run(Object[] o) throws Throwable; 34 } 35 36 public static class SAMCaller { 37 private final SAM sam; 38 39 public SAMCaller(SAM sam) { 40 this.sam = sam; 41 } 42 43 public Object callSAM(Object[] o) throws Throwable { 44 return sam.run(o); 45 } 46 } 47 48 public MHSamTF(MHCall target) { 49 super(target); 50 } 51 52 @Override 53 protected MethodHandle computeInboundMH(MethodHandle targetMH) throws NoSuchMethodException, IllegalAccessException { 54 throw new RuntimeException("Internal error: Functionality is disabled in JDK7"); 55 /* 56 MethodHandle mh = targetMH.asSpreader(Object[].class, targetMH.type().parameterCount()); 57 58 SAM sam = MethodHandles.asInstance(mh, SAM.class); 59 60 // The checks below aimed to increase coverage 61 MethodHandle mhCopy = MethodHandles.wrapperInstanceTarget(sam); 62 if ( ! mh.equals(mhCopy) ) { 63 throw new IllegalArgumentException("wrapperInstanceTarget returned a different MH: [" + mhCopy + "]; original was [" + mh + "]"); 64 } 65 66 Class<?> samClass = MethodHandles.wrapperInstanceType(sam); 67 if ( ! SAM.class.equals(samClass) ) { 68 throw new IllegalArgumentException("wrapperInstanceType returned a different class: [" + samClass + "]; original was [" + SAM.class + "]"); 69 } 70 71 if ( ! MethodHandles.isWrapperInstance(sam) ) { 72 throw new IllegalArgumentException("isWrapperInstance returned false for SAM object: [" + sam + "]"); 73 } 74 75 return MethodHandles.convertArguments( 76 MethodHandles.lookup().findVirtual(SAMCaller.class, "callSAM", MethodType.methodType(Object.class, Object[].class)) 77 .bindTo(new SAMCaller(sam)) 78 .asCollector(Object[].class, targetMH.type().parameterCount()), 79 targetMH.type()); 80 81 */ 82 } 83 84 @Override 85 protected String getName() { 86 return "SAM"; 87 } 88 89 @Override 90 protected String getDescription() { 91 return ""; 92 } 93 }