1 files changed, 109 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/AspectValue.java b/src/main/java/com/google/devtools/build/lib/skyframe/AspectValue.java
new file mode 100644
index 0000000000..9b863bd4d3
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+++ b/src/main/java/com/google/devtools/build/lib/skyframe/AspectValue.java
@@ -0,0 +1,109 @@
+// Copyright 2014 Google Inc. 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.skyframe;
+
+import com.google.common.base.Objects;
+import com.google.devtools.build.lib.actions.Action;
+import com.google.devtools.build.lib.analysis.Aspect;
+import com.google.devtools.build.lib.analysis.ConfiguredAspectFactory;
+import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
+import com.google.devtools.build.lib.syntax.Label;
+import com.google.devtools.build.skyframe.SkyFunctionName;
+import com.google.devtools.build.skyframe.SkyKey;
+
+/**
+ * An aspect in the context of the Skyframe graph.
+ */
+public final class AspectValue extends ActionLookupValue {
+  /**
+   * The key of an action that is generated by an aspect.
+   */
+  public static final class AspectKey extends ActionLookupKey {
+    private final Label label;
+    private final BuildConfiguration configuration;
+    // TODO(bazel-team): class objects are not really hashable or comparable for equality other than
+    // by reference. We should identify the aspect here in a way that does not rely on comparison
+    // by reference so that keys can be serialized and deserialized properly.
+    private final Class<? extends ConfiguredAspectFactory> aspectFactory;
+
+    private AspectKey(Label label, BuildConfiguration configuration,
+        Class<? extends ConfiguredAspectFactory> aspectFactory) {
+      this.label = label;
+      this.configuration = configuration;
+      this.aspectFactory = aspectFactory;
+    }
+
+    @Override
+    public Label getLabel() {
+      return label;
+    }
+
+    public BuildConfiguration getConfiguration() {
+      return configuration;
+    }
+
+    public Class<? extends ConfiguredAspectFactory> getAspect() {
+      return aspectFactory;
+    }
+
+    @Override
+    SkyFunctionName getType() {
+      return SkyFunctions.ASPECT;
+    }
+
+    @Override
+    public int hashCode() {
+      return Objects.hashCode(label, configuration, aspectFactory);
+    }
+
+    @Override
+    public boolean equals(Object other) {
+      if (this == other) {
+        return true;
+      }
+
+      if (!(other instanceof AspectKey)) {
+        return false;
+      }
+
+      AspectKey that = (AspectKey) other;
+      return Objects.equal(label, that.label)
+          && Objects.equal(configuration, that.configuration)
+          && Objects.equal(aspectFactory, that.aspectFactory);
+    }
+
+    @Override
+    public String toString() {
+      return label + "#" + aspectFactory.getSimpleName() + " "
+          + (configuration == null ? "null" : configuration.shortCacheKey());
+    }
+  }
+
+  private final Aspect aspect;
+
+  public AspectValue(Aspect aspect, Iterable<Action> actions) {
+    super(actions);
+    this.aspect = aspect;
+  }
+
+  public Aspect get() {
+    return aspect;
+  }
+
+  public static SkyKey key(Label label, BuildConfiguration configuration,
+      Class<? extends ConfiguredAspectFactory> aspectFactory) {
+    return new SkyKey(SkyFunctions.ASPECT, new AspectKey(label, configuration, aspectFactory));
+  }
+}