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1
52
53 package freemarker.core;
54
55 import java.io.IOException  ;
56
57 import freemarker.template.Template;
58 import freemarker.template.TemplateException;
59
60
61
65 public final class LibraryLoad extends TemplateElement {
66
67 private Expression templateName;
68 private String namespace;
69 private final String templatePath;
70
71
76 LibraryLoad(Template template,
77 Expression templateName,
78 String namespace)
79 {
80 this.namespace = namespace;
81 String templatePath1 = template.getName();
82 int lastSlash = templatePath1.lastIndexOf('/');
83 templatePath = lastSlash == -1 ? "" : templatePath1.substring(0, lastSlash + 1);
84 this.templateName = templateName;
85 }
86
87 void accept(Environment env) throws TemplateException, IOException {
88 String templateNameString = templateName.getStringValue(env);
89 if( templateNameString == null ) {
90 String msg = "Error " + getStartLocation()
91 + "The expression " + templateName + " is undefined.";
92 throw new InvalidReferenceException(msg, env);
93 }
94 Template importedTemplate;
95 try {
96 if(!env.isClassicCompatible()) {
97 if (templateNameString.indexOf("://") >0) {
98 ;
99 }
100 else if(templateNameString.length() > 0 && templateNameString.charAt(0) == '/') {
101 int protIndex = templatePath.indexOf("://");
102 if (protIndex >0) {
103 templateNameString = templatePath.substring(0, protIndex + 2) + templateNameString;
104 } else {
105 templateNameString = templateNameString.substring(1);
106 }
107 }
108 else {
109 templateNameString = templatePath + templateNameString;
110 }
111 }
112 importedTemplate = env.getTemplateForImporting(templateNameString);
113 }
114 catch (ParseException pe) {
115 String msg = "Error parsing imported template "
116 + templateNameString;
117 throw new TemplateException(msg, pe, env);
118 }
119 catch (IOException ioe) {
120 String msg = "Error reading imported file "
121 + templateNameString;
122 throw new TemplateException(msg, ioe, env);
123 }
124 env.importLib(importedTemplate, namespace);
125 }
126
127 public String getCanonicalForm() {
128 StringBuffer buf = new StringBuffer ("<#import ");
129 buf.append(templateName);
130 buf.append(" as ");
131 buf.append(namespace);
132 buf.append("/>");
133 return buf.toString();
134 }
135
136 public String getDescription() {
137 return "import " + templateName + " as " + namespace;
138 }
139
140 public String getTemplateName() {
141 return templateName.toString();
142 }
143 }
144 |
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Java API By Example, From Geeks To Geeks.