Coverage Report - org.apache.commons.scxml.Evaluator

Classes in this File Line Coverage Branch Coverage Complexity
Evaluator
N/A 
N/A 
1

 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.scxml;
 18  
 
 19  
 import org.w3c.dom.Node;
 20  
 
 21  
 /**
 22  
  * Interface for a component that may be used by the SCXML engines to
 23  
  * evaluate the expressions within the SCXML document.
 24  
  *
 25  
  */
 26  
 public interface Evaluator {
 27  
 
 28  
     /**
 29  
      * Evaluate an expression.
 30  
      *
 31  
      * @param ctx variable context
 32  
      * @param expr expression
 33  
      * @return a result of the evaluation
 34  
      * @throws SCXMLExpressionException A malformed exception
 35  
      */
 36  
     Object eval(Context ctx, String expr)
 37  
     throws SCXMLExpressionException;
 38  
 
 39  
     /**
 40  
      * Evaluate a condition.
 41  
      * Manifests as "cond" attributes of <transition>,
 42  
      * <if> and <elseif> elements.
 43  
      *
 44  
      * @param ctx variable context
 45  
      * @param expr expression
 46  
      * @return true/false
 47  
      * @throws SCXMLExpressionException A malformed exception
 48  
      */
 49  
     Boolean evalCond(Context ctx, String expr)
 50  
     throws SCXMLExpressionException;
 51  
 
 52  
     /**
 53  
      * Evaluate a location that returns a Node within an XML data tree.
 54  
      * Manifests as "location" attributes of <assign> element.
 55  
      *
 56  
      * @param ctx variable context
 57  
      * @param expr expression
 58  
      * @return The location node.
 59  
      * @throws SCXMLExpressionException A malformed exception
 60  
      */
 61  
     Node evalLocation(Context ctx, String expr)
 62  
     throws SCXMLExpressionException;
 63  
 
 64  
     /**
 65  
      * Create a new child context.
 66  
      *
 67  
      * @param parent parent context
 68  
      * @return new child context
 69  
      */
 70  
     Context newContext(Context parent);
 71  
 
 72  
 }
 73