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.BasicType.*; 29 import static java.lang.invoke.MethodHandleStatics.*; 30 31 /** 32 * A method handle whose behavior is determined only by its LambdaForm. 33 * @author jrose 34 */ 35 final class SimpleMethodHandle extends BoundMethodHandle { 36 private SimpleMethodHandle(MethodType type, LambdaForm form) { 37 super(type, form); 38 } 39 40 /*non-public*/ static BoundMethodHandle make(MethodType type, LambdaForm form) { 41 return new SimpleMethodHandle(type, form); 42 } 43 44 /*non-public*/ static final SpeciesData SPECIES_DATA = SpeciesData.EMPTY; 45 46 /*non-public*/ public SpeciesData speciesData() { 47 return SPECIES_DATA; 48 } 49 50 @Override 51 /*non-public*/ BoundMethodHandle copyWith(MethodType mt, LambdaForm lf) { 52 return make(mt, lf); 53 } 54 55 @Override 56 String internalProperties() { 57 return "\n& Class="+getClass().getSimpleName(); 58 } 59 60 @Override 61 /*non-public*/ public int fieldCount() { 62 return 0; 63 } 64 65 @Override 66 /*non-public*/ final BoundMethodHandle copyWithExtendL(MethodType mt, LambdaForm lf, Object narg) { 67 return BoundMethodHandle.bindSingle(mt, lf, narg); // Use known fast path. 68 } 69 @Override 70 /*non-public*/ final BoundMethodHandle copyWithExtendI(MethodType mt, LambdaForm lf, int narg) { 71 try { 72 return (BoundMethodHandle) SPECIES_DATA.extendWith(I_TYPE).constructor().invokeBasic(mt, lf, narg); 73 } catch (Throwable ex) { 74 throw uncaughtException(ex); 75 } 76 } 77 @Override 78 /*non-public*/ final BoundMethodHandle copyWithExtendJ(MethodType mt, LambdaForm lf, long narg) { 79 try { 80 return (BoundMethodHandle) SPECIES_DATA.extendWith(J_TYPE).constructor().invokeBasic(mt, lf, narg); 81 } catch (Throwable ex) { 82 throw uncaughtException(ex); 83 } 84 } 85 @Override 86 /*non-public*/ final BoundMethodHandle copyWithExtendF(MethodType mt, LambdaForm lf, float narg) { 87 try { 88 return (BoundMethodHandle) SPECIES_DATA.extendWith(F_TYPE).constructor().invokeBasic(mt, lf, narg); 89 } catch (Throwable ex) { 90 throw uncaughtException(ex); 91 } 92 } 93 @Override 94 /*non-public*/ final BoundMethodHandle copyWithExtendD(MethodType mt, LambdaForm lf, double narg) { 95 try { 96 return (BoundMethodHandle) SPECIES_DATA.extendWith(D_TYPE).constructor().invokeBasic(mt, lf, narg); 97 } catch (Throwable ex) { 98 throw uncaughtException(ex); 99 } 100 } 101 }