1 /* 2 * Copyright (c) 2008, 2012, 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 28 import static java.lang.invoke.LambdaForm.*; 29 import static java.lang.invoke.LambdaForm.BasicType.*; 30 31 /** 32 * A method handle whose behavior is determined only by its LambdaForm. 33 * @author jrose 34 */ 35 final class SimpleMethodHandle extends MethodHandle { 36 private SimpleMethodHandle(MethodType type, LambdaForm form) { 37 super(type, form); 38 } 39 40 /*non-public*/ static SimpleMethodHandle make(MethodType type, LambdaForm form) { 41 return new SimpleMethodHandle(type, form); 42 } 43 44 @Override 45 MethodHandle bindArgument(int pos, BasicType basicType, Object value) { 46 MethodType type2 = type().dropParameterTypes(pos, pos+1); 47 LambdaForm form2 = internalForm().bind(1+pos, BoundMethodHandle.SpeciesData.EMPTY); 48 return BoundMethodHandle.bindSingle(type2, form2, basicType, value); 49 } 50 51 @Override 52 MethodHandle dropArguments(MethodType srcType, int pos, int drops) { 53 LambdaForm newForm = internalForm().addArguments(pos, srcType.parameterList().subList(pos, pos+drops)); 54 return new SimpleMethodHandle(srcType, newForm); 55 } 56 57 @Override 58 MethodHandle permuteArguments(MethodType newType, int[] reorder) { 59 LambdaForm form2 = internalForm().permuteArguments(1, reorder, basicTypes(newType.parameterList())); 60 return new SimpleMethodHandle(newType, form2); 61 } 62 63 @Override 64 MethodHandle copyWith(MethodType mt, LambdaForm lf) { 65 return new SimpleMethodHandle(mt, lf); 66 } 67 68 }