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1
52
53 package freemarker.core;
54
55 import java.io.*;
56 import java.util.*;
57 import freemarker.template.*;
58
59
62 final class UnifiedCall extends TemplateElement {
63
64 private Expression nameExp;
65 private Map namedArgs;
66 private List positionalArgs, bodyParameterNames;
67 boolean legacySyntax, notransform;
68
69
70 UnifiedCall(Expression nameExp,
71 Map namedArgs,
72 TemplateElement nestedBlock,
73 List bodyParameterNames)
74 {
75 this.nameExp = nameExp;
76 this.namedArgs = namedArgs;
77 this.nestedBlock = nestedBlock;
78 this.bodyParameterNames = bodyParameterNames;
79 notransform = legacySyntax
80 || (positionalArgs != null && positionalArgs.isEmpty())
81 || (bodyParameterNames != null && !bodyParameterNames.isEmpty());
82 }
83
84 UnifiedCall(Expression nameExp,
85 List positionalArgs,
86 TemplateElement nestedBlock,
87 List bodyParameterNames)
88 {
89 this.nameExp = nameExp;
90 this.positionalArgs = positionalArgs;
91 if (nestedBlock == TextBlock.EMPTY_BLOCK) {
92 nestedBlock = null;
93 }
94 this.nestedBlock = nestedBlock;
95 this.bodyParameterNames = bodyParameterNames;
96 }
97
98
99 void accept(Environment env) throws TemplateException, IOException {
100 TemplateModel tm = nameExp.getAsTemplateModel(env);
101 if (tm == Macro.DO_NOTHING_MACRO) return; if (!notransform && (tm instanceof TemplateTransformModel)) {
103 Map args;
104 if (namedArgs != null && !namedArgs.isEmpty()) {
105 args = new HashMap();
106 for (Iterator it = namedArgs.entrySet().iterator(); it.hasNext();) {
107 Map.Entry entry = (Map.Entry) it.next();
108 String  key = (String ) entry.getKey();
109 Expression valueExp = (Expression) entry.getValue();
110 TemplateModel value = valueExp.getAsTemplateModel(env);
111 args.put(key, value);
112 }
113 } else {
114 args = EmptyMap.instance;
115 }
116 env.visit(nestedBlock, (TemplateTransformModel) tm, args);
117 return;
118 }
119 if (tm instanceof Macro) {
120 Macro macro = (Macro) tm;
121 if (macro.isFunction && !legacySyntax) {
122 throw new TemplateException("Routine "
123 + macro.getName()
124 + " is a function. "
125 + "A function can only be called within the evaluation of an expression.",
126 env);
127 }
128 env.visit(macro,
129 namedArgs,
130 positionalArgs,
131 bodyParameterNames,
132 nestedBlock);
133 return;
134 }
135 if (tm == null) {
136 throw new InvalidReferenceException(this.getStartLocation() + " " + nameExp + " not found.", env);
137 } else if (notransform) {
138 throw new TemplateException(getStartLocation() + ": " + nameExp + " is not a Macro.", env);
139 } else {
140 throw new TemplateException(getStartLocation() + ": " + nameExp + " is not a Macro or Transform.", env);
141 }
142 }
143
144 public String getCanonicalForm() {
145 StringBuffer buf = new StringBuffer ("<@");
146 buf.append(nameExp.getCanonicalForm());
147 if (positionalArgs != null) {
148 for (int i=0; i<positionalArgs.size(); i++) {
149 Expression arg = (Expression) positionalArgs.get(i);
150 if (i!=0) {
151 buf.append(',');
152 }
153 buf.append(' ');
154 buf.append(arg.getCanonicalForm());
155 }
156 }
157 else {
158 ArrayList keys = new ArrayList(namedArgs.keySet());
159 Collections.sort(keys);
160 for (int i=0; i<keys.size();i++) {
161 Expression arg = (Expression) namedArgs.get(keys.get(i));
162 buf.append(' ');
163 buf.append(keys.get(i));
164 buf.append('=');
165 buf.append(arg.getCanonicalForm());
166 }
167 }
168 if (nestedBlock == null) {
169 buf.append("/>");
170 }
171 else {
172 buf.append('>');
173 buf.append(nestedBlock.getCanonicalForm());
174 buf.append("</@");
175 if (nameExp instanceof Identifier || (nameExp instanceof Dot && ((Dot) nameExp).onlyHasIdentifiers())) {
176 buf.append(nameExp);
177 }
178 buf.append('>');
179 }
180 return buf.toString();
181 }
182
183 public String getDescription() {
184 return "user-directive " + nameExp;
185 }
186
196 }
197 |
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