1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.jexl3;
18
19 import org.apache.commons.jexl3.annotations.NoJexl;
20
21 /**
22 * A readonly context wrapper.
23 * @since 3.0
24 */
25 public final class ReadonlyContext implements JexlContext, JexlContext.OptionsHandle {
26 /** The wrapped context. */
27 private final JexlContext wrapped;
28 /** The wrapped engine options. */
29 private final JexlOptions options;
30
31 /**
32 * Creates a new readonly context.
33 * @param context the wrapped context
34 * @param eopts the engine evaluation options
35 */
36 public ReadonlyContext(final JexlContext context, final JexlOptions eopts) {
37 wrapped = context;
38 options = eopts;
39 }
40
41 @Override
42 @NoJexl
43 public Object get(final String name) {
44 return wrapped.get(name);
45 }
46
47 @Override
48 @NoJexl
49 public JexlOptions getEngineOptions() {
50 return options;
51 }
52
53 @Override
54 @NoJexl
55 public boolean has(final String name) {
56 return wrapped.has(name);
57 }
58
59 /**
60 * Will throw an UnsupportedOperationException when called; the JexlEngine deals with it appropriately.
61 * @param name the unused variable name
62 * @param value the unused variable value
63 */
64 @Override
65 @NoJexl
66 public void set(final String name, final Object value) {
67 throw new UnsupportedOperationException("Not supported.");
68 }
69 }