SimpleLinkRequest.java revision 1551:f3b883bec2d0 
1/*
2 * Copyright (c) 2010, 2013, 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/*
27 * This file is available under and governed by the GNU General Public
28 * License version 2 only, as published by the Free Software Foundation.
29 * However, the following notice accompanied the original version of this
30 * file, and Oracle licenses the original version of this file under the BSD
31 * license:
32 */
33/*
34   Copyright 2009-2013 Attila Szegedi
35
36   Licensed under both the Apache License, Version 2.0 (the "Apache License")
37   and the BSD License (the "BSD License"), with licensee being free to
38   choose either of the two at their discretion.
39
40   You may not use this file except in compliance with either the Apache
41   License or the BSD License.
42
43   If you choose to use this file in compliance with the Apache License, the
44   following notice applies to you:
45
46       You may obtain a copy of the Apache License at
47
48           http://www.apache.org/licenses/LICENSE-2.0
49
50       Unless required by applicable law or agreed to in writing, software
51       distributed under the License is distributed on an "AS IS" BASIS,
52       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
53       implied. See the License for the specific language governing
54       permissions and limitations under the License.
55
56   If you choose to use this file in compliance with the BSD License, the
57   following notice applies to you:
58
59       Redistribution and use in source and binary forms, with or without
60       modification, are permitted provided that the following conditions are
61       met:
62       * Redistributions of source code must retain the above copyright
63         notice, this list of conditions and the following disclaimer.
64       * Redistributions in binary form must reproduce the above copyright
65         notice, this list of conditions and the following disclaimer in the
66         documentation and/or other materials provided with the distribution.
67       * Neither the name of the copyright holder nor the names of
68         contributors may be used to endorse or promote products derived from
69         this software without specific prior written permission.
70
71       THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
72       IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
73       TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
74       PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
75       BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
76       CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
77       SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
78       BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
79       WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
80       OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
81       ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
82*/
83
84package jdk.dynalink.linker.support;
85
86import java.util.Objects;
87import jdk.dynalink.CallSiteDescriptor;
88import jdk.dynalink.linker.LinkRequest;
89
90/**
91 * Default simple implementation of {@link LinkRequest}.
92 */
93public class SimpleLinkRequest implements LinkRequest {
94
95    private final CallSiteDescriptor callSiteDescriptor;
96    private final Object[] arguments;
97    private final boolean callSiteUnstable;
98
99    /**
100     * Creates a new link request.
101     *
102     * @param callSiteDescriptor the descriptor for the call site being linked.
103     * Must not be null.
104     * @param callSiteUnstable true if the call site being linked is considered
105     * unstable.
106     * @param arguments the arguments for the invocation. Must not be null.
107     * @throws NullPointerException if either {@code callSiteDescriptor} or
108     * {@code arguments} is null.
109     */
110    public SimpleLinkRequest(final CallSiteDescriptor callSiteDescriptor, final boolean callSiteUnstable, final Object... arguments) {
111        this.callSiteDescriptor = Objects.requireNonNull(callSiteDescriptor);
112        this.callSiteUnstable = callSiteUnstable;
113        this.arguments = arguments.clone();
114    }
115
116    @Override
117    public Object[] getArguments() {
118        return arguments.clone();
119    }
120
121    @Override
122    public Object getReceiver() {
123        return arguments.length > 0 ? arguments[0] : null;
124    }
125
126    @Override
127    public CallSiteDescriptor getCallSiteDescriptor() {
128        return callSiteDescriptor;
129    }
130
131    @Override
132    public boolean isCallSiteUnstable() {
133        return callSiteUnstable;
134    }
135
136    @Override
137    public LinkRequest replaceArguments(final CallSiteDescriptor newCallSiteDescriptor, final Object... newArguments) {
138        return new SimpleLinkRequest(newCallSiteDescriptor, callSiteUnstable, newArguments);
139    }
140}
141