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1
52
53 package freemarker.core;
54
55 import java.util.Date  ;
56 import freemarker.template.*;
57
58
62 class EvaluationUtil
63 {
64 private EvaluationUtil()
65 {
66 }
67
68 static String getString(TemplateScalarModel model, Expression expr, Environment env)
69 throws
70 TemplateException
71 {
72 String value = model.getAsString();
73 if(value == null)
74 {
75 if(env.isClassicCompatible())
76 {
77 return "";
78 }
79 else
80 {
81 throw new TemplateException(expr + " evaluated to null string.", env);
82 }
83 }
84 return value;
85 }
86
87 static Number getNumber(Expression expr, Environment env)
88 throws
89 TemplateException
90 {
91 TemplateModel model = expr.getAsTemplateModel(env);
92 return getNumber(model, expr, env);
93 }
94
95 static Number getNumber(TemplateModel model, Expression expr, Environment env)
96 throws
97 TemplateException
98 {
99 if(model instanceof TemplateNumberModel)
100 {
101 return getNumber((TemplateNumberModel)model, expr, env);
102 }
103 else if(model == null) {
104 throw new InvalidReferenceException(expr + " is undefined.", env);
105 }
106 else
107 {
108 throw new NonNumericalException(expr + " is not a number, it is " + model.getClass().getName(), env);
109 }
110 }
111
112 static Number getNumber(TemplateNumberModel model, Expression expr, Environment env)
113 throws TemplateModelException, TemplateException
114 {
115 Number value = model.getAsNumber();
116 if(value == null) {
117 throw new TemplateException(expr + " evaluated to null number.", env);
118 }
119 return value;
120 }
121
122 static Date getDate(TemplateDateModel model, Expression expr, Environment env)
123 throws TemplateModelException, TemplateException
124 {
125 Date value = model.getAsDate();
126 if(value == null) {
127 throw new TemplateException(expr + " evaluated to null date.", env);
128 }
129 return value;
130 }
131 }
132 |
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