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52
53 package freemarker.core;
54
55 import java.io.IOException  ;
56 import java.util.*;
57 import freemarker.template.TemplateException;
58
59
62 final class AssignmentInstruction extends TemplateElement {
63
64 private int scope;
65 private Expression namespaceExp;
66
67 AssignmentInstruction(int scope) {
68 this.scope = scope;
69 nestedElements = new ArrayList(1);
70 }
71
72 void addAssignment(Assignment ass) {
73 nestedElements.add(ass);
74 }
75
76 void setNamespaceExp(Expression namespaceExp) {
77 this.namespaceExp = namespaceExp;
78 for (int i=0; i<nestedElements.size();i++) {
79 ((Assignment) nestedElements.get(i)).setNamespaceExp(namespaceExp);
80 }
81 }
82
83 void accept(Environment env) throws TemplateException, IOException {
84 for (int i = 0; i<nestedElements.size(); i++) {
85 Assignment ass = (Assignment) nestedElements.get(i);
86 env.visit(ass);
87 }
88 }
89
90 public String getCanonicalForm() {
91 String tag = "<#local ";
92 if (scope == Assignment.GLOBAL) {
93 tag = "<#global ";
94 }
95 else if (scope == Assignment.NAMESPACE) {
96 tag = "<#assign ";
97 }
98 StringBuffer buf = new StringBuffer (tag);
99 for (int i = 0; i<nestedElements.size(); i++) {
100 Assignment ass = (Assignment) nestedElements.get(i);
101 buf.append(ass.getCanonicalForm());
102 if (i < nestedElements.size() -1) {
103 buf.append(" ");
104 }
105 }
106 if (namespaceExp != null) {
107 buf.append(" in ");
108 buf.append(namespaceExp.getCanonicalForm());
109 }
110 buf.append("/>");
111 return buf.toString();
112 }
113
114 public String getDescription() {
115 String tag = "local ";
116 if (scope == Assignment.GLOBAL) {
117 tag = "global ";
118 }
119 else if (scope == Assignment.NAMESPACE) {
120 tag = "assign ";
121 }
122 tag += "assignment";
123 if (nestedElements.size() > 1) {
124 tag += "s";
125 }
126 return tag;
127 }
128
129 public TemplateElement postParseCleanup(boolean stripWhitespace) throws ParseException {
130 super.postParseCleanup(stripWhitespace);
131 if (nestedElements.size() == 1) {
132 Assignment ass = (Assignment) nestedElements.get(0);
133 ass.setLocation(getTemplate(), this, this);
134 return ass;
135 }
136 return this;
137 }
138 }
139 |
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