1 /*

     2  * Copyright (c) 2013, 2018, 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.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 package vm.runtime.defmeth.shared.data;

    25 

    26 import vm.runtime.defmeth.shared.data.AbstractVisitor;

    27 import vm.runtime.defmeth.shared.data.method.param.*;

    28 import vm.runtime.defmeth.shared.executor.AbstractReflectionTest;

    29 

    30 /**

    31  * Extracts a value from Param object.

    32  * It is used when method is invoked using Reflection API

    33  * or through MethodHandle.invokeWithArguments.

    34  */

    35 public class ParamValueExtractor extends AbstractVisitor {

    36     private Object value;

    37     private AbstractReflectionTest methodInvokeTest;

    38 

    39     public Object value() {

    40         param.visit(this);

    41         return value;

    42     }

    43 

    44     private Param param;

    45     public ParamValueExtractor(AbstractReflectionTest methodInvokeTest, Param param) {

    46         this.methodInvokeTest = methodInvokeTest;

    47         this.param = param; }

    48 

    49     @Override public void visitParamInt(IntParam i) { value = i.value(); }

    50     @Override public void visitParamLong(LongParam l) { value = l.value(); }

    51     @Override public void visitParamFloat(FloatParam f) { value = f.value(); }

    52     @Override public void visitParamDouble(DoubleParam d) { value = d.value(); }

    53     @Override public void visitParamString(StringParam str) { value = str.value(); }

    54     @Override public void visitParamNull() { value = null; }

    55     @Override public void visitParamNewInstance(NewInstanceParam type) {

    56         try {

    57             value = methodInvokeTest.resolve(type.clazz()).newInstance();

    58         } catch (InstantiationException | IllegalAccessException e) {

    59             throw new Error(e);

    60         }

    61     }

    62 }