|
1
52
53 package freemarker.core;
54
55 import java.io.IOException  ;
56 import freemarker.template.*;
57
58
59
62 final class RecurseNode extends TemplateElement {
63
64 Expression targetNode, namespaces;
65
66 RecurseNode(Expression targetNode, Expression namespaces) {
67 this.targetNode = targetNode;
68 this.namespaces = namespaces;
69 }
70
71 void accept(Environment env) throws IOException , TemplateException {
72 TemplateModel node = targetNode == null ? null : targetNode.getAsTemplateModel(env);
73 TemplateModel nss = namespaces == null ? null : namespaces.getAsTemplateModel(env);
74 if (namespaces instanceof StringLiteral) {
75 nss = env.importLib(((TemplateScalarModel) nss).getAsString(), null);
76 }
77 else if (namespaces instanceof ListLiteral) {
78 nss = ((ListLiteral) namespaces).evaluateStringsToNamespaces(env);
79 }
80 if (node != null && !(node instanceof TemplateNodeModel)) {
81 throw new TemplateException("Expecting an XML node here, for expression: " + targetNode + ", found a: " + node.getClass().getName(), env);
82 }
83 if (nss != null) {
84 if (nss instanceof TemplateHashModel) {
85 SimpleSequence ss = new SimpleSequence(1);
86 ss.add(nss);
87 nss = ss;
88 }
89 else if (!(nss instanceof TemplateSequenceModel)) {
90 throw new TemplateException("Expecting a sequence of namespaces after 'using'", env);
91 }
92 }
93
94 env.recurse((TemplateNodeModel) node, (TemplateSequenceModel) nss);
95 }
96
97 public String getCanonicalForm() {
98 String result = "<#recurse";
99 if (targetNode != null) result += (" " + targetNode.getCanonicalForm());
100 if (namespaces != null) result += (" using " + namespaces.getCanonicalForm());
101 return result + "/>";
102 }
103
104 public String getDescription() {
105 return "recurse instruction";
106 }
107 }
108 |
Popular Tags |
Java API By Example, From Geeks To Geeks.