Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
RootContext |
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| 2.2857142857142856;2.286 |
1 | /* |
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2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
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3 | * contributor license agreements. See the NOTICE file distributed with |
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4 | * this work for additional information regarding copyright ownership. |
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5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
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6 | * (the "License"); you may not use this file except in compliance with |
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7 | * the License. You may obtain a copy of the License at |
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8 | * |
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9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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10 | * |
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11 | * Unless required by applicable law or agreed to in writing, software |
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12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 | * See the License for the specific language governing permissions and |
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15 | * limitations under the License. |
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16 | */ |
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17 | package org.apache.commons.scxml.env.jsp; |
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18 | ||
19 | import java.io.IOException; |
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20 | import java.io.NotSerializableException; |
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21 | import java.io.ObjectInputStream; |
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22 | import java.io.ObjectOutputStream; |
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23 | ||
24 | import javax.servlet.jsp.JspContext; |
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25 | import javax.servlet.jsp.el.ELException; |
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26 | import javax.servlet.jsp.el.VariableResolver; |
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27 | ||
28 | /** |
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29 | * EL Context for root SCXML element. Wrapper around the host JSP context. |
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30 | * Must treat variables in the host JSP environments as read-only. |
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31 | * |
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32 | */ |
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33 | public final class RootContext extends ELContext { |
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34 | ||
35 | /** Host JSP's VariableResolver. */ |
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36 | private VariableResolver variableResolver; |
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37 | /** Bark if JSP Context is null. */ |
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38 | private static final String ERR_HOST_JSP_CTX_NULL = |
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39 | "Host JSP Context cannot be null"; |
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40 | ||
41 | /** |
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42 | * Constructor. |
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43 | * |
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44 | * @param ctx the host JspContext |
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45 | */ |
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46 | public RootContext(final JspContext ctx) { |
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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 { |
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52 | // only retain the VariableResolver |
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53 | 1 | this.variableResolver = ctx.getVariableResolver(); |
54 | } |
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55 | 1 | } |
56 | ||
57 | /** |
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58 | * Get the value of the given variable in this Context. |
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59 | * |
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60 | * @param name The name of the variable |
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61 | * @return The value (or null) |
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62 | * @see org.apache.commons.scxml.Context#get(java.lang.String) |
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63 | */ |
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64 | public Object get(final String name) { |
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65 | 5 | Object value = super.get(name); |
66 | 5 | if (value == null) { |
67 | try { |
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68 | 4 | value = variableResolver.resolveVariable(name); |
69 | 0 | } catch (ELException ele) { |
70 | 0 | getLog().error(ele.getMessage(), ele); |
71 | 4 | } |
72 | } |
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73 | 5 | return value; |
74 | } |
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75 | ||
76 | /** |
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77 | * Does the given variable exist in this Context. |
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78 | * |
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79 | * @param name The name of the variable |
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80 | * @return boolean true if the variable exists |
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81 | * @see org.apache.commons.scxml.Context#has(java.lang.String) |
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82 | */ |
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83 | public boolean has(final String name) { |
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84 | 2 | boolean exists = super.has(name); |
85 | 2 | Object value = null; |
86 | 2 | if (!exists) { |
87 | try { |
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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 | } |
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95 | } |
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96 | 2 | return exists; |
97 | } |
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98 | ||
99 | /** |
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100 | * Get the VariableResolver associated with this root context. |
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101 | * |
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102 | * @return Returns the variableResolver. |
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103 | */ |
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104 | public VariableResolver getVariableResolver() { |
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105 | 0 | return variableResolver; |
106 | } |
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107 | ||
108 | /** |
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109 | * Set the VariableResolver associated with this root context. |
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110 | * |
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111 | * @param variableResolver The variableResolver to set. |
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112 | */ |
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113 | public void setVariableResolver(final VariableResolver variableResolver) { |
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114 | 0 | this.variableResolver = variableResolver; |
115 | 0 | } |
116 | ||
117 | //--------------------------------------------------- Truth in advertising |
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118 | ||
119 | /** |
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120 | * Instances of this class are not serializable. |
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121 | * |
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122 | * @param out The object output stream. |
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123 | * @throws IOException Guaranteed to throw a NotSerializableException |
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124 | */ |
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125 | private void writeObject(final ObjectOutputStream out) |
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126 | throws IOException { |
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127 | 0 | throw new NotSerializableException(); |
128 | } |
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129 | ||
130 | /** |
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131 | * Instances of this class are not serializable. |
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132 | * |
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133 | * @param in The object input stream. |
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134 | * @throws IOException Guaranteed to throw a NotSerializableException |
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135 | */ |
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136 | private void readObject(final ObjectInputStream in) |
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137 | throws IOException { |
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138 | 0 | throw new NotSerializableException(); |
139 | } |
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140 | ||
141 | } |
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142 |