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

Classes in this File Line Coverage Branch Coverage Complexity
RootContext
61% 
100% 
2.286

 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.env.jsp;
 18  
 
 19  
 import java.io.IOException;
 20  
 import java.io.NotSerializableException;
 21  
 import java.io.ObjectInputStream;
 22  
 import java.io.ObjectOutputStream;
 23  
 
 24  
 import javax.servlet.jsp.JspContext;
 25  
 import javax.servlet.jsp.el.ELException;
 26  
 import javax.servlet.jsp.el.VariableResolver;
 27  
 
 28  
 /**
 29  
  * EL Context for root SCXML element. Wrapper around the host JSP context.
 30  
  * Must treat variables in the host JSP environments as read-only.
 31  
  *
 32  
  */
 33  
 public final class RootContext extends ELContext {
 34  
 
 35  
     /** Host JSP's VariableResolver. */
 36  
     private VariableResolver variableResolver;
 37  
     /** Bark if JSP Context is null. */
 38  
     private static final String ERR_HOST_JSP_CTX_NULL =
 39  
         "Host JSP Context cannot be null";
 40  
 
 41  
     /**
 42  
      * Constructor.
 43  
      *
 44  
      * @param ctx the host JspContext
 45  
      */
 46  
     public RootContext(final JspContext ctx) {
 47  1
         super();
 48  1
         if (ctx == null) {
 49  0
             getLog().error(ERR_HOST_JSP_CTX_NULL);
 50  0
             throw new IllegalArgumentException(ERR_HOST_JSP_CTX_NULL);
 51  
         } else {
 52  
           // only retain the VariableResolver
 53  1
           this.variableResolver = ctx.getVariableResolver();
 54  
         }
 55  1
     }
 56  
 
 57  
     /**
 58  
      * Get the value of the given variable in this Context.
 59  
      *
 60  
      * @param name The name of the variable
 61  
      * @return The value (or null)
 62  
      * @see org.apache.commons.scxml.Context#get(java.lang.String)
 63  
      */
 64  
     public Object get(final String name) {
 65  5
         Object value = super.get(name);
 66  5
         if (value == null) {
 67  
             try {
 68  4
                 value = variableResolver.resolveVariable(name);
 69  0
             } catch (ELException ele) {
 70  0
                 getLog().error(ele.getMessage(), ele);
 71  4
             }
 72  
         }
 73  5
         return value;
 74  
     }
 75  
 
 76  
     /**
 77  
      * Does the given variable exist in this Context.
 78  
      *
 79  
      * @param name The name of the variable
 80  
      * @return boolean true if the variable exists
 81  
      * @see org.apache.commons.scxml.Context#has(java.lang.String)
 82  
      */
 83  
     public boolean has(final String name) {
 84  2
         boolean exists = super.has(name);
 85  2
         Object value = null;
 86  2
         if (!exists) {
 87  
             try {
 88  2
                 value = variableResolver.resolveVariable(name);
 89  0
             } catch (ELException ele) {
 90  0
                 getLog().error(ele.getMessage(), ele);
 91  2
             }
 92  2
             if (value != null) {
 93  2
                 exists = true;
 94  
             }
 95  
         }
 96  2
         return exists;
 97  
     }
 98  
 
 99  
     /**
 100  
      * Get the VariableResolver associated with this root context.
 101  
      *
 102  
      * @return Returns the variableResolver.
 103  
      */
 104  
     public VariableResolver getVariableResolver() {
 105  0
         return variableResolver;
 106  
     }
 107  
 
 108  
     /**
 109  
      * Set the VariableResolver associated with this root context.
 110  
      *
 111  
      * @param variableResolver The variableResolver to set.
 112  
      */
 113  
     public void setVariableResolver(final VariableResolver variableResolver) {
 114  0
         this.variableResolver = variableResolver;
 115  0
     }
 116  
 
 117  
     //--------------------------------------------------- Truth in advertising
 118  
 
 119  
     /**
 120  
      * Instances of this class are not serializable.
 121  
      *
 122  
      * @param out The object output stream.
 123  
      * @throws IOException Guaranteed to throw a NotSerializableException
 124  
      */
 125  
     private void writeObject(final ObjectOutputStream out)
 126  
     throws IOException {
 127  0
         throw new NotSerializableException();
 128  
     }
 129  
 
 130  
     /**
 131  
      * Instances of this class are not serializable.
 132  
      *
 133  
      * @param in The object input stream.
 134  
      * @throws IOException Guaranteed to throw a NotSerializableException
 135  
      */
 136  
     private void readObject(final ObjectInputStream in)
 137  
     throws IOException {
 138  0
         throw new NotSerializableException();
 139  
     }
 140  
 
 141  
 }
 142