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comparison src/org/tmatesoft/hg/repo/Revlog.java @ 604:c3505001a42a

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Use nodeid reverse lookup speedup cache for #isKnown, if available
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 06 May 2013 18:53:04 +0200
parents 8143c1f77d45
children 66f1cc23b906
comparison
equal deleted inserted replaced
603:707b5c7c6fa4 604:c3505001a42a
148 * @param nid revision to look up 148 * @param nid revision to look up
149 * @return revision local index in this revlog 149 * @return revision local index in this revlog
150 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em> 150 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
151 */ 151 */
152 public final int getRevisionIndex(Nodeid nid) throws HgRuntimeException { 152 public final int getRevisionIndex(Nodeid nid) throws HgRuntimeException {
153 int revision; 153 final int revision = doFindWithCache(nid);
154 if (useRevisionLookup) {
155 if (revisionLookup == null) {
156 revisionLookup = RevisionLookup.createFor(content);
157 }
158 revision = revisionLookup.findIndex(nid);
159 } else {
160 revision = content.findRevisionIndex(nid);
161 }
162 if (revision == BAD_REVISION) { 154 if (revision == BAD_REVISION) {
163 // using toString() to identify revlog. HgDataFile.toString includes path, HgManifest and HgChangelog instances 155 // using toString() to identify revlog. HgDataFile.toString includes path, HgManifest and HgChangelog instances
164 // are fine with default (class name) 156 // are fine with default (class name)
165 // Perhaps, more tailored description method would be suitable here 157 // Perhaps, more tailored description method would be suitable here
166 throw new HgInvalidRevisionException(String.format("Can't find revision %s in %s", nid.shortNotation(), this), nid, null); 158 throw new HgInvalidRevisionException(String.format("Can't find revision %s in %s", nid.shortNotation(), this), nid, null);
167 } 159 }
168 return revision; 160 return revision;
169 } 161 }
170 162
163 private int doFindWithCache(Nodeid nid) {
164 if (useRevisionLookup) {
165 if (revisionLookup == null) {
166 revisionLookup = RevisionLookup.createFor(content);
167 }
168 return revisionLookup.findIndex(nid);
169 } else {
170 return content.findRevisionIndex(nid);
171 }
172 }
173
171 /** 174 /**
172 * Note, {@link Nodeid#NULL} nodeid is not reported as known in any revlog. 175 * Note, {@link Nodeid#NULL} nodeid is not reported as known in any revlog.
173 * 176 *
174 * @param nodeid 177 * @param nodeid
175 * @return <code>true</code> if revision is part of this revlog 178 * @return <code>true</code> if revision is part of this revlog
176 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em> 179 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
177 */ 180 */
178 public final boolean isKnown(Nodeid nodeid) throws HgRuntimeException { 181 public final boolean isKnown(Nodeid nodeid) throws HgRuntimeException {
179 final int rn = content.findRevisionIndex(nodeid); 182 final int rn = doFindWithCache(nodeid);
180 if (BAD_REVISION == rn) { 183 if (BAD_REVISION == rn) {
181 return false; 184 return false;
182 } 185 }
183 if (rn < 0 || rn >= content.revisionCount()) { 186 if (rn < 0 || rn >= content.revisionCount()) {
184 // Sanity check 187 // Sanity check