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1
52
53 package freemarker.template.utility;
54
55 import java.util.ArrayList  ;
56 import java.util.HashMap ;
57
58 import freemarker.ext.util.WrapperTemplateModel;
59 import freemarker.template.AdapterTemplateModel;
60 import freemarker.template.TemplateBooleanModel;
61 import freemarker.template.TemplateCollectionModel;
62 import freemarker.template.TemplateDateModel;
63 import freemarker.template.TemplateHashModelEx;
64 import freemarker.template.TemplateModel;
65 import freemarker.template.TemplateModelException;
66 import freemarker.template.TemplateModelIterator;
67 import freemarker.template.TemplateNumberModel;
68 import freemarker.template.TemplateScalarModel;
69 import freemarker.template.TemplateSequenceModel;
70
71
76 public class DeepUnwrap
77 {
78 private static final Class OBJECT_CLASS = Object .class;
79
106 public static Object unwrap(TemplateModel model) throws TemplateModelException {
107 return unwrap(model, false);
108 }
109
110
115 public static Object premissiveUnwrap(TemplateModel model) throws TemplateModelException {
116 return unwrap(model, true);
117 }
118
119 private static Object unwrap(TemplateModel model, boolean permissive) throws TemplateModelException {
120 if(model instanceof AdapterTemplateModel) {
121 return ((AdapterTemplateModel)model).getAdaptedObject(OBJECT_CLASS);
122 }
123 if (model instanceof WrapperTemplateModel) {
124 return ((WrapperTemplateModel)model).getWrappedObject();
125 }
126 if(model instanceof TemplateScalarModel) {
127 return ((TemplateScalarModel)model).getAsString();
128 }
129 if(model instanceof TemplateNumberModel) {
130 return ((TemplateNumberModel)model).getAsNumber();
131 }
132 if(model instanceof TemplateDateModel) {
133 return ((TemplateDateModel)model).getAsDate();
134 }
135 if(model instanceof TemplateBooleanModel) {
136 return ((TemplateBooleanModel)model).getAsBoolean() ? Boolean.TRUE : Boolean.FALSE;
137 }
138 if(model instanceof TemplateSequenceModel) {
139 TemplateSequenceModel seq = (TemplateSequenceModel)model;
140 ArrayList list = new ArrayList (seq.size());
141 for(int i = 0; i < seq.size(); ++i) {
142 list.add(unwrap(seq.get(i)));
143 }
144 return list;
145 }
146 if(model instanceof TemplateCollectionModel) {
147 TemplateCollectionModel coll = (TemplateCollectionModel)model;
148 ArrayList list = new ArrayList ();
149 TemplateModelIterator it = coll.iterator();
150 while(it.hasNext()) {
151 list.add(unwrap(it.next()));
152 }
153 return list;
154 }
155 if(model instanceof TemplateHashModelEx) {
156 TemplateHashModelEx hash = (TemplateHashModelEx)model;
157 HashMap map = new HashMap ();
158 TemplateModelIterator keys = hash.keys().iterator();
159 while(keys.hasNext()) {
160 String key = (String )unwrap(keys.next());
161 map.put(key, unwrap(hash.get(key)));
162 }
163 return map;
164 }
165 if (permissive) {
166 return model;
167 }
168 throw new TemplateModelException("Cannot deep-unwrap model of type " + model.getClass().getName());
169 }
170 } |
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