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1
28
29 package com.caucho.relaxng.program;
30
31 import com.caucho.util.CharBuffer;
32 import com.caucho.util.L10N;
33 import com.caucho.xml.QName;
34
35 import java.util.ArrayList  ;
36 import java.util.HashSet ;
37
38
41 public class ChoiceNameItem extends NameClassItem {
42 protected final static L10N L = new L10N(ChoiceNameItem.class);
43
44 private ArrayList <NameClassItem> _items = new ArrayList <NameClassItem>();
45
46 public ChoiceNameItem()
47 {
48 }
49
50 public static NameClassItem create(NameClassItem left, NameClassItem right)
51 {
52 ChoiceNameItem choice = new ChoiceNameItem();
53 choice.addItem(left);
54 choice.addItem(right);
55
56 return choice.getMin();
57 }
58
59 public void addItem(NameClassItem item)
60 {
61 if (item == null)
62 return;
63 else if (item instanceof ChoiceNameItem) {
64 ChoiceNameItem choice = (ChoiceNameItem) item;
65
66 for (int i = 0; i < choice._items.size(); i++)
67 addItem(choice._items.get(i));
68
69 return;
70 }
71
72 for (int i = 0; i < _items.size(); i++) {
73 NameClassItem subItem = _items.get(i);
74
75 if (item.equals(subItem))
76 return;
77 }
78
79 _items.add(item);
80 }
81
82 public NameClassItem getMin()
83 {
84 if (_items.size() == 0)
85 return null;
86 else if (_items.size() == 1)
87 return _items.get(0);
88 else
89 return this;
90 }
91
92
95 public void firstSet(HashSet <QName> set)
96 {
97 for (int i = 0; i < _items.size(); i++)
98 _items.get(i).firstSet(set);
99 }
100
101
104 public boolean matches(QName name)
105 {
106 for (int i = 0; i < _items.size(); i++)
107 if (_items.get(i).matches(name))
108 return true;
109
110 return false;
111 }
112
113
116 public String toSyntaxDescription(String prefix)
117 {
118 CharBuffer cb = new CharBuffer();
119
120 cb.append("(");
121
122 for (int i = 0; i < _items.size(); i++) {
123 if (i != 0)
124 cb.append(" | ");
125
126 cb.append(_items.get(i).toSyntaxDescription(prefix));
127 }
128
129 cb.append(")");
130
131 return cb.toString();
132 }
133
134
137 public int hashCode()
138 {
139 int hash = 37;
140
141 for (int i = 0; i < _items.size(); i++)
142 hash += _items.get(i).hashCode();
143
144 return hash;
145 }
146
147
150 public boolean equals(Object o)
151 {
152 if (this == o)
153 return true;
154
155 if (! (o instanceof ChoiceNameItem))
156 return false;
157
158 ChoiceNameItem choice = (ChoiceNameItem) o;
159
160 return isSubset(choice) && choice.isSubset(this);
161 }
162
163 private boolean isSubset(ChoiceNameItem item)
164 {
165 if (_items.size() != item._items.size())
166 return false;
167
168 for (int i = 0; i < _items.size(); i++) {
169 NameClassItem subItem = _items.get(i);
170
171 if (! item._items.contains(subItem))
172 return false;
173 }
174
175 return true;
176 }
177
178 public String toString()
179 {
180 StringBuffer sb = new StringBuffer ();
181
182 sb.append("ChoiceNameItem[");
183 for (int i = 0; i < _items.size(); i++) {
184 if (i != 0)
185 sb.append(", ");
186 sb.append(_items.get(i));
187 }
188
189 sb.append("]");
190
191 return sb.toString();
192 }
193 }
194
195 |
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