| /* |
| * 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.model; |
| |
| import org.apache.commons.scxml2.ActionExecutionContext; |
| import org.apache.commons.scxml2.Context; |
| import org.apache.commons.scxml2.Evaluator; |
| import org.apache.commons.scxml2.SCXMLExpressionException; |
| import org.apache.commons.scxml2.TriggerEvent; |
| |
| /** |
| * The class in this SCXML object model that corresponds to the |
| * <var> SCXML element. |
| * |
| */ |
| public class Var extends Action { |
| |
| /** |
| * Serial version UID. |
| */ |
| private static final long serialVersionUID = 1L; |
| |
| /** |
| * The name of the variable to be created. |
| */ |
| private String name; |
| |
| /** |
| * The expression that evaluates to the initial value of the variable. |
| */ |
| private String expr; |
| |
| /** |
| * Constructor. |
| */ |
| public Var() { |
| super(); |
| } |
| |
| /** |
| * Get the expression that evaluates to the initial value |
| * of the variable. |
| * |
| * @return String Returns the expr. |
| */ |
| public final String getExpr() { |
| return expr; |
| } |
| |
| /** |
| * Set the expression that evaluates to the initial value |
| * of the variable. |
| * |
| * @param expr The expr to set. |
| */ |
| public final void setExpr(final String expr) { |
| this.expr = expr; |
| } |
| |
| /** |
| * Get the name of the (new) variable. |
| * |
| * @return String Returns the name. |
| */ |
| public final String getName() { |
| return name; |
| } |
| |
| /** |
| * Set the name of the (new) variable. |
| * |
| * @param name The name to set. |
| */ |
| public final void setName(final String name) { |
| this.name = name; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void execute(ActionExecutionContext exctx) throws ModelException, SCXMLExpressionException { |
| Context ctx = exctx.getContext(getParentEnterableState()); |
| Evaluator eval = exctx.getEvaluator(); |
| ctx.setLocal(getNamespacesKey(), getNamespaces()); |
| Object varObj = eval.eval(ctx, expr); |
| ctx.setLocal(getNamespacesKey(), null); |
| ctx.setLocal(name, varObj); |
| if (exctx.getAppLog().isDebugEnabled()) { |
| exctx.getAppLog().debug("<var>: Defined variable '" + name |
| + "' with initial value '" + String.valueOf(varObj) + "'"); |
| } |
| TriggerEvent ev = new TriggerEvent(name + ".change", TriggerEvent.CHANGE_EVENT); |
| exctx.getInternalIOProcessor().addEvent(ev); |
| } |
| } |
| |