|
1
52
53 package freemarker.core;
54
55 import freemarker.template.*;
56 import java.util.*;
57
58 final class HashLiteral extends Expression {
59
60 private final ArrayList keys, values;
61 private final int size;
62
63 HashLiteral(ArrayList keys, ArrayList values) {
64 this.keys = keys;
65 this.values = values;
66 this.size = keys.size();
67 keys.trimToSize();
68 values.trimToSize();
69 }
70
71 TemplateModel _getAsTemplateModel(Environment env) throws TemplateException {
72 return new SequenceHash(env);
73 }
74
75 public String  getCanonicalForm() {
76 StringBuffer buf = new StringBuffer ("{");
77 for (int i = 0; i < size; i++) {
78 Expression key = (Expression) keys.get(i);
79 Expression value = (Expression) values.get(i);
80 buf.append(key.getCanonicalForm());
81 buf.append(" : ");
82 buf.append(value.getCanonicalForm());
83 if (i != size-1) {
84 buf.append(",");
85 }
86 }
87 buf.append("}");
88 return buf.toString();
89 }
90
91 boolean isLiteral() {
92 if (constantValue != null) {
93 return true;
94 }
95 for (int i = 0; i < size; i++) {
96 Expression key = (Expression) keys.get(i);
97 Expression value = (Expression) values.get(i);
98 if (!key.isLiteral() || !value.isLiteral()) {
99 return false;
100 }
101 }
102 return true;
103 }
104
105
106 Expression _deepClone(String name, Expression subst) {
107 ArrayList clonedKeys = (ArrayList)keys.clone();
108 for (ListIterator iter = clonedKeys.listIterator(); iter.hasNext();) {
109 iter.set(((Expression)iter.next()).deepClone(name, subst));
110 }
111 ArrayList clonedValues = (ArrayList)values.clone();
112 for (ListIterator iter = clonedValues.listIterator(); iter.hasNext();) {
113 iter.set(((Expression)iter.next()).deepClone(name, subst));
114 }
115 return new HashLiteral(clonedKeys, clonedValues);
116 }
117
118 private class SequenceHash implements TemplateHashModelEx {
119
120 private HashMap keyMap; private TemplateCollectionModel keyCollection, valueCollection;
123 SequenceHash(Environment env) throws TemplateException {
124 keyMap = new HashMap();
125 ArrayList keyList = new ArrayList(size);
126 ArrayList valueList = new ArrayList(size);
127 for (int i = 0; i< size; i++) {
128 Expression keyExp = (Expression) keys.get(i);
129 Expression valExp = (Expression) values.get(i);
130 String key = keyExp.getStringValue(env);
131 TemplateModel value = valExp.getAsTemplateModel(env);
132 assertNonNull(value, valExp, env);
133 keyMap.put(key, value);
134 keyList.add(key);
135 valueList.add(value);
136 }
137 keyCollection = new CollectionAndSequence(new SimpleSequence(keyList));
138 valueCollection = new CollectionAndSequence(new SimpleSequence(valueList));
139 }
140
141 public int size() {
142 return size;
143 }
144
145 public TemplateCollectionModel keys() {
146 return keyCollection;
147 }
148
149 public TemplateCollectionModel values() {
150 return valueCollection;
151 }
152
153 public TemplateModel get(String key) {
154 return (TemplateModel) keyMap.get(key);
155 }
156
157 public boolean isEmpty() {
158 return size == 0;
159 }
160 }
161 }
162 |
Popular Tags |
Java API By Example, From Geeks To Geeks.