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