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1
57
58 package com.sun.org.apache.xerces.internal.impl.xs.dom;
59
60 import com.sun.org.apache.xerces.internal.dom.TextImpl;
61 import com.sun.org.apache.xerces.internal.dom.AttrNSImpl;
62
63
64
74 public final class DOMNodePool {
75
76 private static final int CHUNK_SHIFT = 8;
78
79 private static final int CHUNK_SIZE = 1 << CHUNK_SHIFT;
80
81
82 private static final int CHUNK_MASK = CHUNK_SIZE - 1;
83
84
85 private static final int INITIAL_CHUNK_COUNT = (1 << (10 - CHUNK_SHIFT));
87
88 private ElementNSImpl fElements[][] = new ElementNSImpl[INITIAL_CHUNK_COUNT][];
89 private int fElementIndex = 0;
90
91
92
93 private TextImpl fTextNode[][] = new TextImpl[INITIAL_CHUNK_COUNT][];
94 private int fTextNodeIndex = 0;
95
96
97
98 private AttrNSImpl fAttrNode[][] = new AttrNSImpl[INITIAL_CHUNK_COUNT][];
99 private int fAttrNodeIndex = 0;
100
101
102
103
109 public final ElementNSImpl getElementNode(){
110 int chunk = fElementIndex >> CHUNK_SHIFT;
111 int index = fElementIndex & CHUNK_MASK;
112 ensureElementsCapacity(chunk);
113 if (fElements[chunk][index] == null) {
114 fElements[chunk][index] = new ElementNSImpl();
115 }
116 fElementIndex++;
117 return fElements[chunk][index];
118 }
119
120 private void ensureElementsCapacity(int chunk) {
121 if (fElements.length <= chunk) {
122 fElements = resize(fElements, fElements.length * 2);
123 }
124 else if (fElements[chunk] != null) {
125 return;
126 }
127
128 fElements[chunk] = new ElementNSImpl[CHUNK_SIZE];
129 return;
130 }
131
132 private static ElementNSImpl[][] resize(ElementNSImpl array[][], int newsize) {
133 ElementNSImpl newarray[][] = new ElementNSImpl[newsize][];
134 System.arraycopy(array, 0, newarray, 0, array.length);
135 return newarray;
136 }
137
138
144 public final TextImpl getTextNode(){
145 int chunk = fTextNodeIndex >> CHUNK_SHIFT;
146 int index = fTextNodeIndex & CHUNK_MASK;
147 ensureTextCapacity(chunk);
148 if (fTextNode[chunk][index] == null) {
149 fTextNode[chunk][index] = new TextImpl();
150 }
151 fTextNodeIndex++;
152 return fTextNode[chunk][index];
153 }
154
155 private void ensureTextCapacity(int chunk) {
156 if (fTextNode.length <= chunk) {
157 fTextNode = resize(fTextNode, fTextNode.length * 2);
158 }
159 else if (fTextNode[chunk] != null) {
160 return;
161 }
162
163 fTextNode[chunk] = new TextImpl[CHUNK_SIZE];
164 return;
165 }
166
167 private static TextImpl[][] resize(TextImpl array[][], int newsize) {
168 TextImpl newarray[][] = new TextImpl[newsize][];
169 System.arraycopy(array, 0, newarray, 0, array.length);
170 return newarray;
171 }
172
173
179 public final AttrNSImpl getAttrNode(){
180 int chunk = fAttrNodeIndex >> CHUNK_SHIFT;
181 int index = fAttrNodeIndex & CHUNK_MASK;
182 ensureAttrsCapacity(chunk);
183 if (fAttrNode[chunk][index] == null) {
184 fAttrNode[chunk][index] = new AttrNSImpl();
185 }
186 fAttrNodeIndex++;
187 return fAttrNode[chunk][index];
188 }
189
190 private void ensureAttrsCapacity(int chunk) {
191 if (fAttrNode.length <= chunk) {
192 fAttrNode = resize(fAttrNode, fAttrNode.length * 2);
193 }
194 else if (fAttrNode[chunk] != null) {
195 return;
196 }
197
198 fAttrNode[chunk] = new AttrNSImpl[CHUNK_SIZE];
199 return;
200 }
201
202 private static AttrNSImpl[][] resize(AttrNSImpl array[][], int newsize) {
203 AttrNSImpl newarray[][] = new AttrNSImpl[newsize][];
204 System.arraycopy(array, 0, newarray, 0, array.length);
205 return newarray;
206 }
207
208
209
212 public void reset(){
213 fElementIndex = 0;
214 fTextNodeIndex = 0;
215 fAttrNodeIndex = 0;
216 }
217
218
219 }
220 |
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