--- a/src/org/tmatesoft/hg/core/HgFileInformer.java	Thu Mar 22 19:11:33 2012 +0100
+++ b/src/org/tmatesoft/hg/core/HgFileInformer.java	Thu Mar 22 20:14:06 2012 +0100
@@ -16,201 +16,18 @@
  */
 package org.tmatesoft.hg.core;
 
-import org.tmatesoft.hg.internal.ManifestRevision;
-import org.tmatesoft.hg.repo.HgDataFile;
-import org.tmatesoft.hg.repo.HgManifest;
 import org.tmatesoft.hg.repo.HgRepository;
-import org.tmatesoft.hg.util.Path;
-import org.tmatesoft.hg.util.Status;
+
 
 /**
- * Primary purpose is to provide information about file revisions at specific changeset. Multiple {@link #check(Path)} calls 
- * are possible once {@link #changeset(Nodeid)} (and optionally, {@link #followRenames(boolean)}) were set.
- * 
- * <p>Sample:
- * <pre><code>
- *   HgFileInformer i = new HgFileInformer(hgRepo).changeset(Nodeid.fromString("<40 digits>")).followRenames(true);
- *   if (i.check(file)) {
- *   	HgCatCommand catCmd = new HgCatCommand(hgRepo).revision(i.getFileRevision());
- *   	catCmd.execute(...);
- *   	...
- *   }
- * </pre></code>
- *
- * FIXME need better name. It's more about manifest of specific changeset, rather than informing (about) files
- * TODO may add #manifest(Nodeid) to select manifest according to its revision (not only changeset revision as it's now) 
- * 
+ * @deprecated Use {@link HgChangesetFileSneaker} directly
  * @author Artem Tikhomirov
  * @author TMate Software Ltd.
  */
-public class HgFileInformer {
-
-	private final HgRepository repo;
-	private boolean followRenames;
-	private Nodeid cset;
-	private ManifestRevision cachedManifest;
-	private HgFileRevision fileRevision;
-	private boolean renamed;
-	private Status checkResult;
-
+@Deprecated
+public class HgFileInformer extends HgChangesetFileSneaker {
+	
 	public HgFileInformer(HgRepository hgRepo) {
-		repo = hgRepo;
-	}
-
-	/**
-	 * Select specific changelog revision
-	 * 
-	 * @param nid changeset identifier
-	 * @return <code>this</code> for convenience
-	 */
-	public HgFileInformer changeset(Nodeid nid) {
-		if (nid == null || nid.isNull()) {
-			throw new IllegalArgumentException(); 
-		}
-		cset = nid;
-		cachedManifest = null;
-		fileRevision = null;
-		return this;
-	}
-
-	/**
-	 * Whether to check file origins, default is false (look up only the name supplied)
-	 *
-	 * @param follow <code>true</code> to check copy/rename origin of the file if it is a copy.
-	 * @return <code>this</code> for convenience
-	 */
-	public HgFileInformer followRenames(boolean follow) {
-		followRenames = follow;
-		fileRevision = null;
-		return this;
-	}
-
-	/**
-	 * Shortcut to perform {@link #check(Path)} and {@link #exists()}. Result of the check may be accessed via {@link #getCheckStatus()}.
-	 * 
-	 * @param file name of the file in question
-	 * @return <code>true</code> if file is known at the selected changeset.
-	 * @throws IllegalArgumentException if {@link #changeset(Nodeid)} not specified or file argument is bad.
-	 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
-	 */
-	public boolean checkExists(Path file) throws HgInvalidControlFileException {
-		check(file);
-		if (!checkResult.isOk() && checkResult.getException() instanceof HgInvalidControlFileException) {
-			throw (HgInvalidControlFileException) checkResult.getException();
-		}
-		return checkResult.isOk() && exists();
-	}
-
-	/**
-	 * Find file (or its origin, if {@link #followRenames(boolean)} was set to <code>true</code>) among files known at specified {@link #changeset(Nodeid)}.
-	 * 
-	 * @param file name of the file in question
-	 * @return status object that describes outcome, {@link Status#isOk() Ok} status indicates successful completion of the operation, but doesn't imply
-	 * file existence, use {@link #exists()} for that purpose. Message of the status may provide further hints on what exactly had happened. 
-	 * @throws IllegalArgumentException if {@link #changeset(Nodeid)} not specified or file argument is bad.
-	 */
-	public Status check(Path file) {
-		fileRevision = null;
-		checkResult = null;
-		renamed = false;
-		if (cset == null || file == null || file.isDirectory()) {
-			throw new IllegalArgumentException();
-		}
-		HgDataFile dataFile = repo.getFileNode(file);
-		if (!dataFile.exists()) {
-			checkResult = new Status(Status.Kind.OK, String.format("File named %s is not known in the repository", file));
-			return checkResult;
-		}
-		Nodeid toExtract = null;
-		HgManifest.Flags extractRevFlags = null;
-		String phaseMsg = "Extract manifest revision failed";
-		try {
-			if (cachedManifest == null) {
-				int csetRev = repo.getChangelog().getRevisionIndex(cset);
-				cachedManifest = new ManifestRevision(null, null); // XXX how about context and cached manifest revisions
-				repo.getManifest().walk(csetRev, csetRev, cachedManifest);
-				// cachedManifest shall be meaningful - changelog.getRevisionIndex() above ensures we've got version that exists.
-			}
-			toExtract = cachedManifest.nodeid(file);
-			extractRevFlags = cachedManifest.flags(file);
-			phaseMsg = "Follow copy/rename failed";
-			if (toExtract == null && followRenames) {
-				while (toExtract == null && dataFile.isCopy()) {
-					renamed = true;
-					file = dataFile.getCopySourceName();
-					dataFile = repo.getFileNode(file);
-					toExtract = cachedManifest.nodeid(file);
-					extractRevFlags = cachedManifest.flags(file);
-				}
-			}
-		} catch (HgException ex) {
-			checkResult = new Status(Status.Kind.ERROR, phaseMsg, ex);
-			return checkResult;
-		}
-		if (toExtract != null) {
-			fileRevision = new HgFileRevision(repo, toExtract, extractRevFlags, dataFile.getPath());
-			checkResult = new Status(Status.Kind.OK, String.format("File %s, revision %s found at changeset %s", dataFile.getPath(), toExtract.shortNotation(), cset.shortNotation()));
-			return checkResult;
-		} 
-		checkResult = new Status(Status.Kind.OK, String.format("File %s nor its origins were known at repository %s revision", file, cset.shortNotation()));
-		return checkResult;
-	}
-	
-	/**
-	 * Re-get latest check status object
-	 */
-	public Status getCheckStatus() {
-		assertCheckRan();
-		return checkResult;
-	}
-	
-	/**
-	 * @return result of the last {@link #check(Path)} call.
-	 */
-	public boolean exists() {
-		assertCheckRan();
-		return fileRevision != null;
-	}
-	
-	/**
-	 * @return <code>true</code> if checked file was known by another name at the time of specified changeset.
-	 */
-	public boolean hasAnotherName() {
-		assertCheckRan();
-		return renamed;
-	}
-
-	/**
-	 * @return holder for file revision information
-	 */
-	public HgFileRevision getFileRevision() {
-		assertCheckRan();
-		return fileRevision;
-	}
-
-	/**
-	 * Name of the checked file as it was known at the time of the specified changeset.
-	 * 
-	 * @return handy shortcut for <code>getFileRevision().getPath()</code>
-	 */
-	public Path filename() {
-		assertCheckRan();
-		return fileRevision.getPath();
-	}
-	
-	/**
-	 * Revision of the checked file
-	 * 
-	 * @return handy shortcut for <code>getFileRevision().getRevision()</code>
-	 */
-	public Nodeid revision() {
-		assertCheckRan();
-		return fileRevision.getRevision();
-	}
-
-	private void assertCheckRan() {
-		if (checkResult == null) {
-			throw new HgBadStateException("Shall invoke #check(Path) first");
-		}
+		super(hgRepo);
 	}
 }