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1
52
53 package freemarker.core;
54
55 import java.io.IOException  ;
56 import java.util.*;
57 import freemarker.template.*;
58
59
63 final class BodyInstruction extends TemplateElement {
64
65
66 private List bodyParameters;
67
68
69 BodyInstruction(List bodyParameters) {
70 this.bodyParameters = bodyParameters;
71 }
72
73 List getBodyParameters() {
74 return bodyParameters;
75 }
76
77
86 void accept(Environment env) throws IOException , TemplateException {
87 Context bodyContext = new Context(env);
88 env.visit(bodyContext);
89 }
90
91 public String getCanonicalForm() {
92 StringBuffer buf = new StringBuffer ("<#nested");
93 if (bodyParameters != null) {
94 for (int i = 0; i<bodyParameters.size(); i++) {
95 buf.append(' ');
96 buf.append(bodyParameters.get(i));
97 }
98 }
99 buf.append('>');
100 return buf.toString();
101 }
102
103 public String getDescription() {
104 return "nested macro content";
105 }
106
107
116 class Context implements LocalContext {
117 Macro.Context invokingMacroContext;
118 Environment.Namespace bodyVars;
119
120 Context(Environment env) throws TemplateException {
121 invokingMacroContext = env.getCurrentMacroContext();
122 List bodyParameterNames = invokingMacroContext.bodyParameterNames;
123 if (bodyParameters != null) {
124 for (int i=0; i<bodyParameters.size(); i++) {
125 Expression exp = (Expression) bodyParameters.get(i);
126 TemplateModel tm = exp.getAsTemplateModel(env);
127 if (bodyParameterNames != null && i < bodyParameterNames.size()) {
128 String bodyParameterName = (String ) bodyParameterNames.get(i);
129 if (bodyVars == null) {
130 bodyVars = env.new Namespace();
131 }
132 bodyVars.put(bodyParameterName, tm);
133 }
134 }
135 }
136 }
137
138 public TemplateModel getLocalVariable(String name) throws TemplateModelException {
139 return bodyVars == null ? null : bodyVars.get(name);
140 }
141
142 public Set getLocalVariableNames() {
143 List bodyParameterNames = invokingMacroContext.bodyParameterNames;
144 if (bodyParameterNames == null) return Collections.EMPTY_SET;
145 return new HashSet(bodyParameterNames);
146 }
147 }
148 }
149 |
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