1 package org.apache.turbine.util.template;
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24 import org.apache.commons.logging.Log;
25 import org.apache.commons.logging.LogFactory;
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27 import org.apache.ecs.ConcreteElement;
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29 import org.apache.turbine.modules.NavigationLoader;
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31 import org.apache.turbine.services.template.TurbineTemplate;
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33 import org.apache.turbine.util.RunData;
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49 public class TemplateNavigation
50 {
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52 private static Log log = LogFactory.getLog(TemplateNavigation.class);
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55 private RunData data;
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58 private String template = null;
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65 public TemplateNavigation(RunData data)
66 {
67 this.data = data;
68 }
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77 public TemplateNavigation setTemplate(String template)
78 {
79 log.debug("setTemplate(" + template + ")");
80 this.template = template;
81 return this;
82 }
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89 public String toString()
90 {
91 String module = null;
92 String returnValue = null;
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94 try
95 {
96 if (template == null)
97 {
98 returnValue = "Navigation Template is null (Might be unset)";
99 throw new Exception(returnValue);
100 }
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102 data.getTemplateInfo().setNavigationTemplate(template);
103 module = TurbineTemplate.getNavigationName(template);
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105 if (module == null)
106 {
107 returnValue = "Template Service returned null for Navigation Template " + template;
108 throw new Exception(returnValue);
109 }
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111 ConcreteElement results =
112 NavigationLoader.getInstance().eval(data, module);
113 returnValue = results.toString();
114 }
115 catch (Exception e)
116 {
117 if (returnValue == null)
118 {
119 returnValue = "Error processing navigation template: "
120 + template + ", using module: " + module;
121 }
122 log.error(returnValue, e);
123 }
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125 return returnValue;
126 }
127 }