1 files changed, 96 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/query2/UnfilteredTransitiveTraversalValueDTCVisitor.java b/src/main/java/com/google/devtools/build/lib/query2/UnfilteredTransitiveTraversalValueDTCVisitor.java
new file mode 100644
index 0000000000..e1d10eb82e
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/query2/UnfilteredTransitiveTraversalValueDTCVisitor.java
@@ -0,0 +1,96 @@
+// Copyright 2016 The Bazel Authors. All rights reserved.
+//
+// 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.devtools.build.lib.query2;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Multimap;
+import com.google.devtools.build.lib.query2.engine.Callback;
+import com.google.devtools.build.lib.query2.engine.QueryException;
+import com.google.devtools.build.lib.query2.engine.QueryUtil.AggregateAllCallback;
+import com.google.devtools.build.lib.query2.engine.Uniquifier;
+import com.google.devtools.build.skyframe.SkyKey;
+
+/**
+ * Helper class that computes the TTV-only DTC of some given TTV keys, via BFS following all
+ * TTV->TTV dep edges. Disallowed edge filtering is *not* performed.
+ */
+// TODO(nharmata): Unify with UnfilteredUnboundedDepsSkyKeyVisitor.
+class UnfilteredTransitiveTraversalValueDTCVisitor extends AbstractSkyKeyParallelVisitor<SkyKey> {
+  private final SkyQueryEnvironment env;
+
+  private UnfilteredTransitiveTraversalValueDTCVisitor(
+      SkyQueryEnvironment env,
+      Uniquifier<SkyKey> uniquifier,
+      int processResultsBatchSize,
+      AggregateAllCallback<SkyKey, ImmutableSet<SkyKey>> aggregateAllCallback) {
+    super(
+        uniquifier,
+        aggregateAllCallback,
+        ParallelSkyQueryUtils.VISIT_BATCH_SIZE,
+        processResultsBatchSize);
+    this.env = env;
+  }
+
+  static class Factory implements ParallelVisitor.Factory {
+    private final SkyQueryEnvironment env;
+    private final Uniquifier<SkyKey> uniquifier;
+    private final AggregateAllCallback<SkyKey, ImmutableSet<SkyKey>> aggregateAllCallback;
+    private final int processResultsBatchSize;
+
+    Factory(
+        SkyQueryEnvironment env,
+        Uniquifier<SkyKey> uniquifier,
+        int processResultsBatchSize,
+        AggregateAllCallback<SkyKey, ImmutableSet<SkyKey>> aggregateAllCallback) {
+      this.env = env;
+      this.uniquifier = uniquifier;
+      this.processResultsBatchSize = processResultsBatchSize;
+      this.aggregateAllCallback = aggregateAllCallback;
+    }
+
+    @Override
+    public ParallelVisitor<SkyKey, SkyKey> create() {
+      return new UnfilteredTransitiveTraversalValueDTCVisitor(
+          env, uniquifier, processResultsBatchSize, aggregateAllCallback);
+    }
+  }
+
+  @Override
+  protected void processPartialResults(
+      Iterable<SkyKey> keysToUseForResult, Callback<SkyKey> callback)
+      throws QueryException, InterruptedException {
+    callback.process(keysToUseForResult);
+  }
+
+  @Override
+  protected Visit getVisitResult(Iterable<SkyKey> ttvKeys) throws InterruptedException {
+    Multimap<SkyKey, SkyKey> deps = env.getUnfilteredDirectDepsOfSkyKeys(ttvKeys);
+    return new Visit(
+        /*keysToUseForResult=*/ deps.keySet(),
+        /*keysToVisit=*/ deps.values()
+            .stream()
+            .filter(SkyQueryEnvironment.IS_TTV)
+            .collect(ImmutableList.toImmutableList()));
+  }
+
+  @Override
+  protected Iterable<SkyKey> preprocessInitialVisit(Iterable<SkyKey> keys) {
+    // ParallelVisitorCallback passes in TTV keys.
+    Preconditions.checkState(Iterables.all(keys, SkyQueryEnvironment.IS_TTV), keys);
+    return keys;
+  }
+}