1 /* 2 * Copyright (c) 2012, 2013, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package java.lang.invoke; 27 import java.lang.invoke.MethodHandleNatives.Constants; 28 29 //Not yet public: public 30 class MethodHandleInfo { 31 public static final int 32 REF_getField = Constants.REF_getField, 33 REF_getStatic = Constants.REF_getStatic, 34 REF_putField = Constants.REF_putField, 35 REF_putStatic = Constants.REF_putStatic, 36 REF_invokeVirtual = Constants.REF_invokeVirtual, 37 REF_invokeStatic = Constants.REF_invokeStatic, 38 REF_invokeSpecial = Constants.REF_invokeSpecial, 39 REF_newInvokeSpecial = Constants.REF_newInvokeSpecial, 40 REF_invokeInterface = Constants.REF_invokeInterface; 41 42 private final Class<?> declaringClass; 43 private final String name; 44 private final MethodType methodType; 45 private final int referenceKind; 46 47 public MethodHandleInfo(MethodHandle mh) { 48 MemberName mn = mh.internalMemberName(); 49 if (mn == null) throw new IllegalArgumentException("not a direct method handle"); 50 this.declaringClass = mn.getDeclaringClass(); 51 this.name = mn.getName(); 52 this.methodType = mn.getMethodOrFieldType(); 53 byte refKind = mn.getReferenceKind(); 54 if (refKind == REF_invokeSpecial && !mh.isInvokeSpecial()) 55 // Devirtualized method invocation is usually formally virtual. 56 refKind = REF_invokeVirtual; 57 this.referenceKind = refKind; 58 } 59 60 public Class<?> getDeclaringClass() { 61 return declaringClass; 62 } 63 64 public String getName() { 65 return name; 66 } 67 68 public MethodType getMethodType() { 69 return methodType; 70 } 71 72 public int getReferenceKind() { 73 return referenceKind; 74 } 75 }