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 }