rt/emul/compact/src/main/java/java/lang/invoke/SimpleMethodHandle.java
author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
Sat, 09 Aug 2014 11:11:13 +0200
branchjdk8-b132
changeset 1646 c880a8a8803b
permissions -rw-r--r--
Batch of classes necessary to implement invoke dynamic interfaces. Taken from JDK8 build 132
jaroslav@1646
     1
/*
jaroslav@1646
     2
 * Copyright (c) 2008, 2012, Oracle and/or its affiliates. All rights reserved.
jaroslav@1646
     3
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jaroslav@1646
     4
 *
jaroslav@1646
     5
 * This code is free software; you can redistribute it and/or modify it
jaroslav@1646
     6
 * under the terms of the GNU General Public License version 2 only, as
jaroslav@1646
     7
 * published by the Free Software Foundation.  Oracle designates this
jaroslav@1646
     8
 * particular file as subject to the "Classpath" exception as provided
jaroslav@1646
     9
 * by Oracle in the LICENSE file that accompanied this code.
jaroslav@1646
    10
 *
jaroslav@1646
    11
 * This code is distributed in the hope that it will be useful, but WITHOUT
jaroslav@1646
    12
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jaroslav@1646
    13
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jaroslav@1646
    14
 * version 2 for more details (a copy is included in the LICENSE file that
jaroslav@1646
    15
 * accompanied this code).
jaroslav@1646
    16
 *
jaroslav@1646
    17
 * You should have received a copy of the GNU General Public License version
jaroslav@1646
    18
 * 2 along with this work; if not, write to the Free Software Foundation,
jaroslav@1646
    19
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jaroslav@1646
    20
 *
jaroslav@1646
    21
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
jaroslav@1646
    22
 * or visit www.oracle.com if you need additional information or have any
jaroslav@1646
    23
 * questions.
jaroslav@1646
    24
 */
jaroslav@1646
    25
jaroslav@1646
    26
package java.lang.invoke;
jaroslav@1646
    27
jaroslav@1646
    28
import static java.lang.invoke.LambdaForm.*;
jaroslav@1646
    29
import static java.lang.invoke.MethodHandleNatives.Constants.*;
jaroslav@1646
    30
import java.util.logging.Level;
jaroslav@1646
    31
import java.util.logging.Logger;
jaroslav@1646
    32
jaroslav@1646
    33
/**
jaroslav@1646
    34
 * A method handle whose behavior is determined only by its LambdaForm.
jaroslav@1646
    35
 * @author jrose
jaroslav@1646
    36
 */
jaroslav@1646
    37
final class SimpleMethodHandle extends MethodHandle {
jaroslav@1646
    38
    private SimpleMethodHandle(MethodType type, LambdaForm form) {
jaroslav@1646
    39
        super(type, form);
jaroslav@1646
    40
    }
jaroslav@1646
    41
jaroslav@1646
    42
    /*non-public*/ static SimpleMethodHandle make(MethodType type, LambdaForm form) {
jaroslav@1646
    43
        return new SimpleMethodHandle(type, form);
jaroslav@1646
    44
    }
jaroslav@1646
    45
jaroslav@1646
    46
    @Override
jaroslav@1646
    47
    MethodHandle bindArgument(int pos, char basicType, Object value) {
jaroslav@1646
    48
        MethodType type2 = type().dropParameterTypes(pos, pos+1);
jaroslav@1646
    49
        LambdaForm form2 = internalForm().bind(1+pos, BoundMethodHandle.SpeciesData.EMPTY);
jaroslav@1646
    50
        return BoundMethodHandle.bindSingle(type2, form2, basicType, value);
jaroslav@1646
    51
    }
jaroslav@1646
    52
jaroslav@1646
    53
    @Override
jaroslav@1646
    54
    MethodHandle dropArguments(MethodType srcType, int pos, int drops) {
jaroslav@1646
    55
        LambdaForm newForm = internalForm().addArguments(pos, srcType.parameterList().subList(pos, pos+drops));
jaroslav@1646
    56
        return new SimpleMethodHandle(srcType, newForm);
jaroslav@1646
    57
    }
jaroslav@1646
    58
jaroslav@1646
    59
    @Override
jaroslav@1646
    60
    MethodHandle permuteArguments(MethodType newType, int[] reorder) {
jaroslav@1646
    61
        LambdaForm form2 = internalForm().permuteArguments(1, reorder, basicTypes(newType.parameterList()));
jaroslav@1646
    62
        return new SimpleMethodHandle(newType, form2);
jaroslav@1646
    63
    }
jaroslav@1646
    64
jaroslav@1646
    65
    @Override
jaroslav@1646
    66
    MethodHandle copyWith(MethodType mt, LambdaForm lf) {
jaroslav@1646
    67
        return new SimpleMethodHandle(mt, lf);
jaroslav@1646
    68
    }
jaroslav@1646
    69
jaroslav@1646
    70
}