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1
11 package org.eclipse.ant.internal.ui.dtd.schema;
12
13 import org.eclipse.ant.internal.ui.dtd.IAtom;
14 import org.eclipse.ant.internal.ui.dtd.IDfm;
15 import org.eclipse.ant.internal.ui.dtd.util.Factory;
16 import org.eclipse.ant.internal.ui.dtd.util.FactoryObject;
17 import org.eclipse.ant.internal.ui.dtd.util.MapHolder;
18 import org.eclipse.ant.internal.ui.dtd.util.SortedMap;
19
20
21
29 public class Dfm extends MapHolder implements IDfm, FactoryObject {
30
31 public boolean accepting;
32 public boolean empty, any;
33 public int id;
34 private static int unique = 0;
35 private static Factory factory = new Factory();
36 private Dfm fNext;
37
38 public static Dfm dfm(boolean accepting) {
39 Dfm dfm = free();
40 dfm.accepting = accepting;
41 return dfm;
42 }
43
44 protected Dfm() {
45 }
46
47 private static Dfm free() {
48 Dfm dfm = (Dfm) factory.getFree();
49 if (dfm == null)
50 dfm = new Dfm();
51 dfm.accepting = dfm.empty = dfm.any = false;
52 dfm.id = unique++;
53 return dfm;
54 }
55
56 public static Dfm dfm(IAtom accept, Dfm follow) {
57 Dfm dfm = free();
58 dfm.keys = new Object  [1];
59 dfm.keys[0] = accept;
60 dfm.values = new Object [1];
61 dfm.values[0] = follow;
62 return dfm;
63 }
64
65 public static void free(Dfm dfm) {
66 dfm.setKeys(null);
67 dfm.setValues(null);
68 factory.setFree(dfm);
69 }
70
71 public boolean isAccepting() {
72 return accepting;
73 }
74
75 public IDfm advance(String name) {
76 if (any)
77 return this;
78 if (empty)
79 return null;
80 if (keys == null)
81 return null;
82 SortedMap map = getIndirectStringMap(this);
83 Dfm dfm = (Dfm) map.get(name);
84 freeMap(map);
85 return dfm;
86 }
87
88 public String [] getAccepts() {
89 if (keys == null)
90 return new String [0];
91 String [] s = new String [keys.length];
92 for (int i = 0; i < s.length; i++) {
93 s[i] = keys[i].toString();
94 }
95 return s;
96 }
97
98 public Dfm[] getFollows() {
99 if (values == null)
100 return new Dfm[0];
101 Dfm[] s = new Dfm[values.length];
102 System.arraycopy(values,0,s,0,values.length);
103 return s;
104 }
105
106 public void merge(Dfm other) {
107 accepting |= other.accepting;
108 SortedMap map = getIndirectStringMap(this);
109 SortedMap othermap = getIndirectStringMap(other);
110 map.merge(othermap);
111 freeMap(map);
112 freeMap(othermap);
113 }
114
115 public SortedMap getMap() {
116 return getIndirectStringMap(this);
117 }
118
119
122 public FactoryObject next() {
123 return fNext;
124 }
125
126
129 public void next(FactoryObject obj) {
130 fNext = (Dfm) obj;
131 }
132
133
136 public boolean isAny() {
137 return any;
138 }
139
140
143 public boolean isEmpty() {
144 return empty;
145 }
146
147
150 public IAtom getAtom(String name) {
151 Object [] allKeys = getKeys();
152 if (empty || allKeys == null){
153 return null;
154 }
155 SortedMap map = getIndirectStringMap(this);
156 int index = map.keyIndex(name);
157 if (index < 0) {
158 return null;
159 }
160 return (IAtom) allKeys[index];
161 }
162
163
166 public IDfm advance(String namespace, String localname) {
167 return advance(localname);
169 }
170 } |
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