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.parser;
18
19 /**
20 * Lambda (function).
21 */
22 public final class ASTJexlLambda extends ASTJexlScript {
23 /**
24 */
25 private static final long serialVersionUID = 1L;
26
27 ASTJexlLambda(final int id) {
28 super(id);
29 }
30
31 @Override
32 protected boolean isConstant(final boolean literal) {
33 // a closure is constant if it does not capture any variables
34 return getCapturedVariables().length == 0;
35 }
36
37 /**
38 * @return true if outermost script.
39 */
40 public boolean isTopLevel() {
41 return jjtGetParent() == null;
42 }
43 }