| /* |
| * 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.commons.scxml2.env.xpath; |
| |
| import org.apache.commons.jxpath.Variables; |
| import org.apache.commons.scxml2.Context; |
| |
| /** |
| * JXPath Variables mapping for SCXML Context |
| */ |
| public class ContextVariables implements Variables { |
| |
| private final Context ctx; |
| |
| public ContextVariables(Context ctx) { |
| this.ctx = ctx; |
| } |
| |
| @Override |
| public boolean isDeclaredVariable(final String varName) { |
| return ctx.has(varName); |
| } |
| |
| @Override |
| public Object getVariable(final String varName) { |
| return ctx.get(varName); |
| } |
| |
| @Override |
| public void declareVariable(final String varName, final Object value) { |
| ctx.set(varName, value); |
| } |
| |
| @Override |
| public void undeclareVariable(final String varName) { |
| if (ctx.has(varName)) { |
| Context cctx = ctx; |
| while (!cctx.hasLocal(varName)) { |
| cctx = cctx.getParent(); |
| if (cctx == null) { |
| return; |
| } |
| } |
| cctx.getVars().remove(varName); |
| } |
| } |
| } |