diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/DeleteReviewer.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/DeleteReviewer.java
index a7e525460a..a121248dba 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/DeleteReviewer.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/DeleteReviewer.java
@@ -77,7 +77,7 @@ class DeleteReviewer implements RestModifyView<ReviewerResource, Input> {
         new Predicate<PatchSetApproval>() {
           @Override
           public boolean apply(PatchSetApproval input) {
-            return input.getAccountId().equals(rsrc.getAccount().getId());
+            return input.getAccountId().equals(rsrc.getUser().getAccountId());
           }
         });
   }
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/GetReviewer.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/GetReviewer.java
index 28f397c6a2..8c41be8df0 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/GetReviewer.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/GetReviewer.java
@@ -27,7 +27,7 @@ public class GetReviewer implements RestReadView<ReviewerResource> {
   }
 
   @Override
-  public Object apply(ReviewerResource reviewerResource) throws OrmException {
-    return json.format(reviewerResource);
+  public Object apply(ReviewerResource rsrc) throws OrmException {
+    return json.format(rsrc);
   }
 }
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/ListReviewers.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/ListReviewers.java
index 1c68e9492e..48c054adb6 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/ListReviewers.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/ListReviewers.java
@@ -32,20 +32,23 @@ class ListReviewers implements RestReadView<ChangeResource> {
   private final AccountCache accountCache;
   private final Provider<ReviewDb> dbProvider;
   private final ReviewerJson json;
+  private final ReviewerResource.Factory resourceFactory;
 
   @Inject
   ListReviewers(AccountCache accountCache,
       Provider<ReviewDb> dbProvider,
+      ReviewerResource.Factory resourceFactory,
       ReviewerJson json) {
     this.accountCache = accountCache;
     this.dbProvider = dbProvider;
+    this.resourceFactory = resourceFactory;
     this.json = json;
   }
 
   @Override
   public Object apply(ChangeResource rsrc) throws BadRequestException,
       OrmException {
-    Map<Account.Id, Object> reviewers = Maps.newLinkedHashMap();
+    Map<Account.Id, ReviewerResource> reviewers = Maps.newLinkedHashMap();
     ReviewDb db = dbProvider.get();
     Change.Id changeId = rsrc.getChange().getId();
     for (PatchSetApproval patchSetApproval
@@ -53,10 +56,9 @@ class ListReviewers implements RestReadView<ChangeResource> {
       Account.Id accountId = patchSetApproval.getAccountId();
       if (!reviewers.containsKey(accountId)) {
         Account account = accountCache.get(accountId).getAccount();
-        reviewers.put(accountId,
-                      json.format(new ReviewerResource(rsrc, account)));
+        reviewers.put(accountId, resourceFactory.create(rsrc, account));
       }
     }
-    return reviewers.values();
+    return json.format(reviewers.values());
   }
 }
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/Module.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/Module.java
index 6586725e78..b00b3d278e 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/Module.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/Module.java
@@ -71,6 +71,7 @@ public class Module extends RestApiModule {
     install(new FactoryModule() {
       @Override
       protected void configure() {
+        factory(ReviewerResource.Factory.class);
         factory(AccountInfo.Loader.Factory.class);
         factory(EmailReviewComments.Factory.class);
       }
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/ReviewerJson.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/ReviewerJson.java
index d4743865cb..9479e67a99 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/ReviewerJson.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/ReviewerJson.java
@@ -14,25 +14,104 @@
 
 package com.google.gerrit.server.change;
 
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import com.google.gerrit.common.data.ApprovalType;
+import com.google.gerrit.common.data.ApprovalTypes;
+import com.google.gerrit.common.data.PermissionRange;
 import com.google.gerrit.reviewdb.client.Account;
+import com.google.gerrit.reviewdb.client.ApprovalCategoryValue;
+import com.google.gerrit.reviewdb.client.Change;
+import com.google.gerrit.reviewdb.client.PatchSet;
+import com.google.gerrit.reviewdb.client.PatchSetApproval;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.project.ChangeControl;
+import com.google.gerrit.server.workflow.CategoryFunction;
+import com.google.gerrit.server.workflow.FunctionState;
+import com.google.gwtorm.server.OrmException;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
 
 public class ReviewerJson {
-  ReviewerJson() {
+  private final Provider<ReviewDb> db;
+  private final ApprovalTypes approvalTypes;
+  private final FunctionState.Factory functionState;
+  private final AccountInfo.Loader.Factory accountLoaderFactory;
+
+  @Inject
+  ReviewerJson(Provider<ReviewDb> db,
+      ApprovalTypes approvalTypes,
+      FunctionState.Factory functionState,
+      AccountInfo.Loader.Factory accountLoaderFactory) {
+    this.db = db;
+    this.approvalTypes = approvalTypes;
+    this.functionState = functionState;
+    this.accountLoaderFactory = accountLoaderFactory;
   }
 
-  public ReviewerInfo format(ReviewerResource reviewerResource) {
-    ReviewerInfo reviewerInfo = new ReviewerInfo();
-    Account account = reviewerResource.getAccount();
-    reviewerInfo.id = account.getId().toString();
-    reviewerInfo.email = account.getPreferredEmail();
-    reviewerInfo.name = account.getFullName();
-    return reviewerInfo;
+  public List<ReviewerInfo> format(Collection<ReviewerResource> rsrcs) throws OrmException {
+    List<ReviewerInfo> infos = Lists.newArrayListWithCapacity(rsrcs.size());
+    AccountInfo.Loader loader = accountLoaderFactory.create(true);
+    for (ReviewerResource rsrc : rsrcs) {
+      ReviewerInfo info = formatOne(rsrc);
+      loader.put(info);
+      infos.add(info);
+    }
+    loader.fill();
+    return infos;
   }
 
-  public static class ReviewerInfo {
+  public List<ReviewerInfo> format(ReviewerResource rsrc) throws OrmException {
+    return format(ImmutableList.<ReviewerResource> of(rsrc));
+  }
+
+  private ReviewerInfo formatOne(ReviewerResource rsrc) throws OrmException {
+    Account.Id id = rsrc.getUser().getAccountId();
+    ReviewerInfo out = new ReviewerInfo(id);
+
+    Change change = rsrc.getChange();
+    PatchSet.Id psId = change.currentPatchSetId();
+
+    List<PatchSetApproval> approvals = db.get().patchSetApprovals()
+        .byPatchSetUser(psId, id).toList();
+
+    ChangeControl control = rsrc.getControl().forUser(rsrc.getUser());
+    FunctionState fs = functionState.create(control, psId, approvals);
+    for (ApprovalType at : approvalTypes.getApprovalTypes()) {
+      CategoryFunction.forCategory(at.getCategory()).run(at, fs);
+    }
+
+    out.approvals = Maps.newHashMapWithExpectedSize(approvals.size());
+    for (PatchSetApproval ca : approvals) {
+      for (PermissionRange pr : control.getLabelRanges()) {
+        if (pr.getMin() != 0 || pr.getMax() != 0) {
+          // TODO: Support arbitrary labels.
+          ApprovalType at = approvalTypes.byId(ca.getCategoryId());
+          if (at != null) {
+            out.approvals.put(at.getCategory().getLabelName(),
+                ApprovalCategoryValue.formatValue(ca.getValue()));
+          }
+        }
+      }
+    }
+    if (out.approvals.isEmpty()) {
+      out.approvals = null;
+    }
+
+    return out;
+  }
+
+  public static class ReviewerInfo extends AccountInfo {
     final String kind = "gerritcodereview#reviewer";
-    String id;
-    String email;
-    String name;
+    Map<String, String> approvals;
+
+    protected ReviewerInfo(Account.Id id) {
+      super(id);
+    }
   }
 }
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/ReviewerResource.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/ReviewerResource.java
index e93c1754b3..23fba4720f 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/ReviewerResource.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/ReviewerResource.java
@@ -16,20 +16,37 @@ package com.google.gerrit.server.change;
 
 import com.google.gerrit.extensions.restapi.RestView;
 import com.google.gerrit.reviewdb.client.Account;
+import com.google.gerrit.server.IdentifiedUser;
 import com.google.inject.TypeLiteral;
+import com.google.inject.assistedinject.Assisted;
+import com.google.inject.assistedinject.AssistedInject;
 
 public class ReviewerResource extends ChangeResource {
   public static final TypeLiteral<RestView<ReviewerResource>> REVIEWER_KIND =
       new TypeLiteral<RestView<ReviewerResource>>() {};
 
-  private final Account account;
-
-  public ReviewerResource(ChangeResource changeResource, Account account) {
-    super(changeResource);
-    this.account = account;
+  static interface Factory {
+    ReviewerResource create(ChangeResource rsrc, IdentifiedUser user);
+    ReviewerResource create(ChangeResource rsrc, Account account);
   }
 
-  public Account getAccount() {
-    return account;
+  private final IdentifiedUser user;
+
+  @AssistedInject
+  ReviewerResource(@Assisted ChangeResource rsrc,
+      @Assisted IdentifiedUser user) {
+    super(rsrc);
+    this.user = user;
+  }
+
+  @AssistedInject
+  ReviewerResource(IdentifiedUser.GenericFactory userFactory,
+      @Assisted ChangeResource rsrc,
+      @Assisted Account account) {
+    this(rsrc, userFactory.create(account.getId()));
+  }
+
+  public IdentifiedUser getUser() {
+    return user;
   }
 }
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/Reviewers.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/Reviewers.java
index 267f357c65..ba91da3c5d 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/Reviewers.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/Reviewers.java
@@ -38,15 +38,18 @@ public class Reviewers implements
     ChildCollection<ChangeResource, ReviewerResource> {
   private final DynamicMap<RestView<ReviewerResource>> views;
   private final Provider<ReviewDb> dbProvider;
+  private final ReviewerResource.Factory resourceFactory;
   private final AccountCache accountCache;
   private final Provider<ListReviewers> list;
 
   @Inject
   Reviewers(Provider<ReviewDb> dbProvider,
-            DynamicMap<RestView<ReviewerResource>> views,
-            AccountCache accountCache,
-            Provider<ListReviewers> list) {
+      ReviewerResource.Factory resourceFactory,
+      DynamicMap<RestView<ReviewerResource>> views,
+      AccountCache accountCache,
+      Provider<ListReviewers> list) {
     this.dbProvider = dbProvider;
+    this.resourceFactory = resourceFactory;
     this.views = views;
     this.accountCache = accountCache;
     this.list = list;
@@ -69,7 +72,7 @@ public class Reviewers implements
     if (id.equals("self")) {
       CurrentUser user = rsrc.getControl().getCurrentUser();
       if (user instanceof IdentifiedUser) {
-        accountId = ((IdentifiedUser)user).getAccountId();
+        accountId = ((IdentifiedUser) user).getAccountId();
       } else if (user instanceof AnonymousUser) {
         throw new AuthException("Authentication required");
       } else {
@@ -84,7 +87,7 @@ public class Reviewers implements
     // See if the id exists as a reviewer for this change
     if (fetchAccountIds(rsrc).contains(accountId)) {
       Account account = accountCache.get(accountId).getAccount();
-      return new ReviewerResource(rsrc, account);
+      return resourceFactory.create(rsrc, account);
     }
     throw new ResourceNotFoundException(id);
   }