/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.el.lang;
/**
* Stores the state required for correct evaluation of lambda expressions. Lambda expressions may be nested. Correct
* evaluation requires knowledge not just of the current lambda expression, but also of any nested and nesting
* expressions.
* <p>
* The sets of nodes for parsed expressions are cached and, as a result, a set of nodes may be being used by multiple
* concurrent threads. This means any state relating to evaluation cannot be stored in the nodes. State is therefore
* stored in the {@link EvaluationContext} which is created, used for a single evaluation and then discarded.
*/
public final class LambdaExpressionNestedState {
private int nestingCount = 0;
private boolean hasFormalParameters = false;
public void incrementNestingCount() {
nestingCount++;
}
public int getNestingCount() {
return nestingCount;
}
public void setHasFormalParameters() {
hasFormalParameters = true;
}
public boolean getHasFormalParameters() {
return hasFormalParameters;
}
}