Use string constants for refs/*, refs/heads/, refs/tags/

These are fairly well-known strings, used often enough in the code,
so use constants that correspond to them.

Change-Id: I00bc6a2034ab3041816b6cc1492b7f2117d1952f
Signed-off-by: Shawn O. Pearce <sop@google.com>

gerrit-httpd/src/main/java/com/google/gerrit/httpd/rpc/project/AddRefRight.java

@@ -114,25 +114,25 @@ class AddRefRight extends Handler<ProjectDetail> {
       if (categoryId.equals(ApprovalCategory.SUBMIT)
           || categoryId.equals(ApprovalCategory.PUSH_HEAD)) {
         // Explicitly related to a branch head.
-        refPattern = "refs/heads/*";
+        refPattern = Constants.R_HEADS + "*";
 
       } else if (!at.getCategory().isAction()) {
         // Non actions are approval votes on a change, assume these apply
         // to branch heads only.
-        refPattern = "refs/heads/*";
+        refPattern = Constants.R_HEADS + "*";
 
       } else if (categoryId.equals(ApprovalCategory.PUSH_TAG)) {
         // Explicitly related to the tag namespace.
-        refPattern = "refs/tags/*";
+        refPattern = Constants.R_TAGS + "*";
 
       } else if (categoryId.equals(ApprovalCategory.READ)
           || categoryId.equals(ApprovalCategory.OWN)) {
         // Currently these are project-wide rights, so apply that way.
-        refPattern = "refs/*";
+        refPattern = RefRight.ALL;
 
       } else {
         // Assume project wide for the default.
-        refPattern = "refs/*";
+        refPattern = RefRight.ALL;
       }
     }
     while (refPattern.startsWith("/")) {

gerrit-reviewdb/src/main/java/com/google/gerrit/reviewdb/RefRight.java

@@ -22,6 +22,9 @@ import java.util.Comparator;
 
 /** Grant to use an {@link ApprovalCategory} in the scope of a git ref. */
 public final class RefRight {
+  /** Pattern that matches all references in a project. */
+  public static final String ALL = "refs/*";
+
   public static class RefPattern extends
       StringKey<com.google.gwtorm.client.Key<?>> {
     private static final long serialVersionUID = 1L;

gerrit-server/src/main/java/com/google/gerrit/server/schema/SchemaCreator.java

@@ -234,7 +234,7 @@ public class SchemaCreator {
     c.approvalCategories().insert(Collections.singleton(cat));
     c.approvalCategoryValues().insert(vals);
 
-    final RefRight.RefPattern pattern = new RefRight.RefPattern("refs/*");
+    final RefRight.RefPattern pattern = new RefRight.RefPattern(RefRight.ALL);
     {
       final RefRight read =
           new RefRight(new RefRight.Key(DEFAULT_WILD_NAME, pattern,
@@ -327,8 +327,8 @@ public class SchemaCreator {
 
     RefRight right =
         new RefRight(new RefRight.Key(sConfig.wildProjectName,
-            new RefRight.RefPattern("refs/*"), ApprovalCategory.FORGE_IDENTITY,
-            sConfig.registeredGroupId));
+            new RefRight.RefPattern(RefRight.ALL),
+            ApprovalCategory.FORGE_IDENTITY, sConfig.registeredGroupId));
     right.setMinValue(ApprovalCategory.FORGE_AUTHOR);
     right.setMaxValue(ApprovalCategory.FORGE_AUTHOR);
     c.refRights().insert(Collections.singleton(right));

gerrit-server/src/main/java/com/google/gerrit/server/schema/Schema_25.java

@@ -24,6 +24,8 @@ import com.google.gwtorm.jdbc.JdbcSchema;
 import com.google.inject.Inject;
 import com.google.inject.Provider;
 
+import org.eclipse.jgit.lib.Constants;
+
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
@@ -85,20 +87,20 @@ class Schema_25 extends SchemaVersion {
         || category.equals(ApprovalCategory.PUSH_HEAD)
         || nonActions.contains(category)) {
       // Explicitly related to a branch head.
-      ref = new RefRight.RefPattern("refs/heads/*");
+      ref = new RefRight.RefPattern(Constants.R_HEADS + "*");
 
     } else if (category.equals(ApprovalCategory.PUSH_TAG)) {
       // Explicitly related to the tag namespace.
-      ref = new RefRight.RefPattern("refs/tags/*");
+      ref = new RefRight.RefPattern(Constants.R_TAGS + "/*");
 
     } else if (category.equals(ApprovalCategory.READ)
         || category.equals(ApprovalCategory.OWN)) {
       // Currently these are project-wide rights, so apply that way.
-      ref = new RefRight.RefPattern("refs/*");
+      ref = new RefRight.RefPattern(RefRight.ALL);
 
     } else {
       // Assume project wide for the default.
-      ref = new RefRight.RefPattern("refs/*");
+      ref = new RefRight.RefPattern(RefRight.ALL);
     }
 
     RefRight.Key key = new RefRight.Key(project, ref, category, group);

gerrit-server/src/main/java/com/google/gerrit/server/schema/Schema_28.java

@@ -86,8 +86,8 @@ class Schema_28 extends SchemaVersion {
 
     RefRight right =
         new RefRight(new RefRight.Key(sConfig.wildProjectName,
-            new RefRight.RefPattern("refs/*"), ApprovalCategory.FORGE_IDENTITY,
-            sConfig.registeredGroupId));
+            new RefRight.RefPattern(RefRight.ALL),
+            ApprovalCategory.FORGE_IDENTITY, sConfig.registeredGroupId));
     right.setMinValue(ApprovalCategory.FORGE_AUTHOR);
     right.setMaxValue(ApprovalCategory.FORGE_AUTHOR);
     c.refRights().insert(Collections.singleton(right));

gerrit-sshd/src/main/java/com/google/gerrit/sshd/commands/AdminCreateProject.java

@@ -115,8 +115,8 @@ final class AdminCreateProject extends BaseCommand {
     final Project.NameKey newProjectNameKey = new Project.NameKey(projectName);
 
     final RefRight.Key prk =
-        new RefRight.Key(newProjectNameKey, new RefRight.RefPattern("refs/*"),
-            ApprovalCategory.OWN, ownerId);
+        new RefRight.Key(newProjectNameKey, new RefRight.RefPattern(
+            RefRight.ALL), ApprovalCategory.OWN, ownerId);
     final RefRight pr = new RefRight(prk);
     pr.setMaxValue((short) 1);
     pr.setMinValue((short) 1);