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 */ 26 private static final long serialVersionUID = 1L; 27 28 ASTJexlLambda(final int id) { 29 super(id); 30 } 31 32 ASTJexlLambda(final Parser p, final int id) { 33 super(p, id); 34 } 35 36 /** 37 * @return true if outermost script. 38 */ 39 public boolean isTopLevel() { 40 return jjtGetParent() == null; 41 } 42 43 @Override 44 protected boolean isConstant(final boolean literal) { 45 // a closure is constant if it does not capture any variables 46 return getCapturedVariables().length == 0; 47 } 48 }