Add 'parentproject' operator that includes changes of child projects

With the 'parentproject' operator one can find all changes of a
project and its child projects. This is e.g. useful to watch a project
tree.

Change-Id: Id45e6fc391137a1830a1782fea0b1326c661afa9
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

Documentation/user-search.txt

@@ -110,6 +110,12 @@ matches project names by regular expression.  The
 link:http://www.brics.dk/automaton/[dk.brics.automaton
 library] is used for evaluation of such patterns.
 
+[[parentproject]]
+parentproject:'PROJECT'::
++
+Changes occurring in 'PROJECT' or in one of the child projects of
+'PROJECT'.
+
 [[branch]]
 branch:'BRANCH'::
 +

gerrit-gwtui/src/main/java/com/google/gerrit/client/SearchSuggestOracle.java

@@ -22,13 +22,13 @@ import com.google.gwtexpui.safehtml.client.HighlightSuggestOracle;
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 import java.util.TreeSet;
 
 public class SearchSuggestOracle extends HighlightSuggestOracle {
   private static final List<ParamSuggester> paramSuggester = Arrays.asList(
-      new ParamSuggester("project:", new ProjectNameSuggestOracle()),
+      new ParamSuggester(Arrays.asList("project:", "parentproject:"),
+          new ProjectNameSuggestOracle()),
       new ParamSuggester(Arrays.asList("owner:", "reviewer:"),
           new AccountSuggestOracle() {
             @Override
@@ -81,6 +81,7 @@ public class SearchSuggestOracle extends HighlightSuggestOracle {
     suggestions.add("commit:");
     suggestions.add("comment:");
     suggestions.add("project:");
+    suggestions.add("parentproject:");
     suggestions.add("branch:");
     suggestions.add("topic:");
     suggestions.add("ref:");
@@ -207,11 +208,6 @@ public class SearchSuggestOracle extends HighlightSuggestOracle {
     private final List<String> operators;
     private final SuggestOracle parameterSuggestionOracle;
 
-    ParamSuggester(final String operator,
-        final SuggestOracle parameterSuggestionOracle) {
-      this(Collections.singletonList(operator), parameterSuggestionOracle);
-    }
-
     ParamSuggester(final List<String> operators,
         final SuggestOracle parameterSuggestionOracle) {
       this.operators = operators;

gerrit-server/src/main/java/com/google/gerrit/server/project/ListChildProjects.java

@@ -47,6 +47,10 @@ public class ListChildProjects implements RestReadView<ProjectResource> {
     this.projectNodeFactory = projectNodeFactory;
   }
 
+  public void setRecursive(boolean recursive) {
+    this.recursive = recursive;
+  }
+
   @Override
   public List<ProjectInfo> apply(ProjectResource rsrc) {
     if (recursive) {

gerrit-server/src/main/java/com/google/gerrit/server/query/change/BasicChangeRewrites.java

@@ -33,8 +33,8 @@ public abstract class BasicChangeRewrites extends QueryRewriter<ChangeData> {
       new ChangeQueryBuilder.Arguments( //
           new InvalidProvider<ReviewDb>(), //
           new InvalidProvider<ChangeQueryRewriter>(), //
-          null, null, null, null, null, //
-          null, null, null, null, null), null);
+          null, null, null, null, null, null, //
+          null, null, null, null, null, null), null);
 
   static Schema<ChangeData> schema(@Nullable IndexCollection indexes) {
     ChangeIndex index = indexes != null ? indexes.getSearchIndex() : null;

gerrit-server/src/main/java/com/google/gerrit/server/query/change/ChangeQueryBuilder.java

@@ -37,6 +37,7 @@ import com.google.gerrit.server.index.IndexCollection;
 import com.google.gerrit.server.index.Schema;
 import com.google.gerrit.server.patch.PatchListCache;
 import com.google.gerrit.server.project.ChangeControl;
+import com.google.gerrit.server.project.ListChildProjects;
 import com.google.gerrit.server.project.ProjectCache;
 import com.google.gerrit.server.query.IntPredicate;
 import com.google.gerrit.server.query.Predicate;
@@ -93,6 +94,7 @@ public class ChangeQueryBuilder extends QueryBuilder<ChangeData> {
   public static final String FIELD_MESSAGE = "message";
   public static final String FIELD_OWNER = "owner";
   public static final String FIELD_OWNERIN = "ownerin";
+  public static final String FIELD_PARENTPROJECT = "parentproject";
   public static final String FIELD_PROJECT = "project";
   public static final String FIELD_REF = "ref";
   public static final String FIELD_REVIEWER = "reviewer";
@@ -139,6 +141,7 @@ public class ChangeQueryBuilder extends QueryBuilder<ChangeData> {
     final Provider<ReviewDb> dbProvider;
     final Provider<ChangeQueryRewriter> rewriter;
     final IdentifiedUser.GenericFactory userFactory;
+    final Provider<CurrentUser> self;
     final CapabilityControl.Factory capabilityControlFactory;
     final ChangeControl.GenericFactory changeControlGenericFactory;
     final AccountResolver accountResolver;
@@ -147,6 +150,7 @@ public class ChangeQueryBuilder extends QueryBuilder<ChangeData> {
     final PatchListCache patchListCache;
     final GitRepositoryManager repoManager;
     final ProjectCache projectCache;
+    final Provider<ListChildProjects> listChildProjects;
     final IndexCollection indexes;
 
     @Inject
@@ -154,6 +158,7 @@ public class ChangeQueryBuilder extends QueryBuilder<ChangeData> {
     public Arguments(Provider<ReviewDb> dbProvider,
         Provider<ChangeQueryRewriter> rewriter,
         IdentifiedUser.GenericFactory userFactory,
+        Provider<CurrentUser> self,
         CapabilityControl.Factory capabilityControlFactory,
         ChangeControl.GenericFactory changeControlGenericFactory,
         AccountResolver accountResolver,
@@ -162,10 +167,12 @@ public class ChangeQueryBuilder extends QueryBuilder<ChangeData> {
         PatchListCache patchListCache,
         GitRepositoryManager repoManager,
         ProjectCache projectCache,
+        Provider<ListChildProjects> listChildProjects,
         IndexCollection indexes) {
       this.dbProvider = dbProvider;
       this.rewriter = rewriter;
       this.userFactory = userFactory;
+      this.self = self;
       this.capabilityControlFactory = capabilityControlFactory;
       this.changeControlGenericFactory = changeControlGenericFactory;
       this.accountResolver = accountResolver;
@@ -174,6 +181,7 @@ public class ChangeQueryBuilder extends QueryBuilder<ChangeData> {
       this.patchListCache = patchListCache;
       this.repoManager = repoManager;
       this.projectCache = projectCache;
+      this.listChildProjects = listChildProjects;
       this.indexes = indexes;
     }
   }
@@ -314,6 +322,12 @@ public class ChangeQueryBuilder extends QueryBuilder<ChangeData> {
     return new ProjectPredicate(args.dbProvider, name);
   }
 
+  @Operator
+  public Predicate<ChangeData> parentproject(String name) {
+    return new ParentProjectPredicate(args.dbProvider, args.projectCache,
+        args.listChildProjects, args.self, name);
+  }
+
   @Operator
   public Predicate<ChangeData> branch(String name) {
     if (name.startsWith("^"))

gerrit-server/src/main/java/com/google/gerrit/server/query/change/ParentProjectPredicate.java

@@ -0,0 +1,67 @@
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.server.query.change;
+
+import com.google.common.collect.Lists;
+import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.CurrentUser;
+import com.google.gerrit.server.project.ListChildProjects;
+import com.google.gerrit.server.project.ProjectCache;
+import com.google.gerrit.server.project.ProjectJson.ProjectInfo;
+import com.google.gerrit.server.project.ProjectResource;
+import com.google.gerrit.server.project.ProjectState;
+import com.google.gerrit.server.query.OrPredicate;
+import com.google.gerrit.server.query.Predicate;
+import com.google.inject.Provider;
+
+import java.util.Collections;
+import java.util.List;
+
+class ParentProjectPredicate extends OrPredicate<ChangeData> {
+  private final String value;
+
+  ParentProjectPredicate(Provider<ReviewDb> dbProvider,
+      ProjectCache projectCache, Provider<ListChildProjects> listChildProjects,
+      Provider<CurrentUser> self, String value) {
+    super(predicates(dbProvider, projectCache, listChildProjects, self, value));
+    this.value = value;
+  }
+
+  private static List<Predicate<ChangeData>> predicates(
+      Provider<ReviewDb> dbProvider, ProjectCache projectCache,
+      Provider<ListChildProjects> listChildProjects,
+      Provider<CurrentUser> self, String value) {
+    ProjectState projectState = projectCache.get(new Project.NameKey(value));
+    if (projectState == null) {
+      return Collections.emptyList();
+    }
+
+    List<Predicate<ChangeData>> r = Lists.newArrayList();
+    r.add(new ProjectPredicate(dbProvider, projectState.getProject().getName()));
+    ListChildProjects children = listChildProjects.get();
+    children.setRecursive(true);
+    for (ProjectInfo p : children.apply(new ProjectResource(
+        projectState.controlFor(self.get())))) {
+      r.add(new ProjectPredicate(dbProvider, p.name));
+    }
+    return r;
+  }
+
+  @Override
+  public String toString() {
+    return ChangeQueryBuilder.FIELD_PARENTPROJECT + ":" + value;
+  }
+}

gerrit-server/src/test/java/com/google/gerrit/server/index/FakeQueryBuilder.java

@@ -26,7 +26,7 @@ public class FakeQueryBuilder extends ChangeQueryBuilder {
         new FakeQueryBuilder.Definition<ChangeData, FakeQueryBuilder>(
           FakeQueryBuilder.class),
         new ChangeQueryBuilder.Arguments(null, null, null, null, null, null,
-          null, null, null, null, null, indexes),
+          null, null, null, null, null, null, null, indexes),
         null);
   }