Coverage Report - org.apache.commons.scxml.env.jsp.RootContext

Classes in this File Line Coverage Branch Coverage Complexity
RootContext
65% 
100% 
2.4

 1  
 /*
 2  
  *
 3  
  *   Copyright 2005-2006 The Apache Software Foundation.
 4  
  *
 5  
  *  Licensed under the Apache License, Version 2.0 (the "License");
 6  
  *  you may not use this file except in compliance with the License.
 7  
  *  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  
  */
 18  
 package org.apache.commons.scxml.env.jsp;
 19  
 
 20  
 import javax.servlet.jsp.JspContext;
 21  
 import javax.servlet.jsp.el.ELException;
 22  
 import javax.servlet.jsp.el.VariableResolver;
 23  
 
 24  
 /**
 25  
  * EL Context for root SCXML element. Wrapper around the host JSP context.
 26  
  * Must treat variables in the host JSP environments as read-only.
 27  
  *
 28  
  */
 29  
 public final class RootContext extends ELContext {
 30  
 
 31  
     /** Host JSP's VariableResolver. */
 32  
     private VariableResolver variableResolver;
 33  
     /** Bark if JSP Context is null. */
 34  
     private static final String ERR_HOST_JSP_CTX_NULL =
 35  
         "Host JSP Context cannot be null";
 36  
 
 37  
     /**
 38  
      * Constructor.
 39  
      *
 40  
      * @param ctx the host JspContext
 41  
      */
 42  
     public RootContext(final JspContext ctx) {
 43  1
         super();
 44  1
         if (ctx == null) {
 45  0
             getLog().error(ERR_HOST_JSP_CTX_NULL);
 46  0
             throw new IllegalArgumentException(ERR_HOST_JSP_CTX_NULL);
 47  
         } else {
 48  
           // only retain the VariableResolver
 49  1
           this.variableResolver = ctx.getVariableResolver();
 50  
         }
 51  1
     }
 52  
 
 53  
     /**
 54  
      * Get the value of the given variable in this Context.
 55  
      *
 56  
      * @param name The name of the variable
 57  
      * @return The value (or null)
 58  
      * @see org.apache.commons.scxml.Context#get(java.lang.String)
 59  
      */
 60  
     public Object get(final String name) {
 61  5
         Object value = super.get(name);
 62  5
         if (value == null) {
 63  
             try {
 64  4
                 value = variableResolver.resolveVariable(name);
 65  0
             } catch (ELException ele) {
 66  0
                 getLog().error(ele.getMessage(), ele);
 67  4
             }
 68  
         }
 69  5
         return value;
 70  
     }
 71  
 
 72  
     /**
 73  
      * Does the given variable exist in this Context.
 74  
      *
 75  
      * @param name The name of the variable
 76  
      * @return boolean true if the variable exists
 77  
      * @see org.apache.commons.scxml.Context#has(java.lang.String)
 78  
      */
 79  
     public boolean has(final String name) {
 80  2
         boolean exists = super.has(name);
 81  2
         Object value = null;
 82  2
         if (!exists) {
 83  
             try {
 84  2
                 value = variableResolver.resolveVariable(name);
 85  0
             } catch (ELException ele) {
 86  0
                 getLog().error(ele.getMessage(), ele);
 87  2
             }
 88  2
             if (value != null) {
 89  2
                 exists = true;
 90  
             }
 91  
         }
 92  2
         return exists;
 93  
     }
 94  
 
 95  
     /**
 96  
      * Get the VariableResolver associated with this root context.
 97  
      *
 98  
      * @return Returns the variableResolver.
 99  
      */
 100  
     public VariableResolver getVariableResolver() {
 101  0
         return variableResolver;
 102  
     }
 103  
 
 104  
     /**
 105  
      * Set the VariableResolver associated with this root context.
 106  
      *
 107  
      * @param variableResolver The variableResolver to set.
 108  
      */
 109  
     public void setVariableResolver(final VariableResolver variableResolver) {
 110  0
         this.variableResolver = variableResolver;
 111  0
     }
 112  
 
 113  
 }
 114