1 files changed, 105 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/ConfiguredTargetValue.java b/src/main/java/com/google/devtools/build/lib/skyframe/ConfiguredTargetValue.java
new file mode 100644
index 0000000000..200e05ff3f
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/ConfiguredTargetValue.java
@@ -0,0 +1,105 @@
+// 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.annotations.VisibleForTesting;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Iterables;
+import com.google.devtools.build.lib.actions.Action;
+import com.google.devtools.build.lib.analysis.ConfiguredTarget;
+import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
+import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
+import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe;
+import com.google.devtools.build.lib.syntax.Label;
+import com.google.devtools.build.skyframe.SkyKey;
+
+import javax.annotation.Nullable;
+
+/**
+ * A configured target in the context of a Skyframe graph.
+ */
+@Immutable
+@ThreadSafe
+@VisibleForTesting
+public final class ConfiguredTargetValue extends ActionLookupValue {
+
+  // These variables are only non-final because they may be clear()ed to save memory. They are null
+  // only after they are cleared.
+  @Nullable private ConfiguredTarget configuredTarget;
+
+  // We overload this variable to check whether the value has been clear()ed. We don't use a
+  // separate variable in order to save memory.
+  @Nullable private volatile Iterable<Action> actions;
+
+  ConfiguredTargetValue(ConfiguredTarget configuredTarget, Iterable<Action> actions) {
+    super(actions);
+    this.configuredTarget = configuredTarget;
+    this.actions = actions;
+  }
+
+  @VisibleForTesting
+  public ConfiguredTarget getConfiguredTarget() {
+    Preconditions.checkNotNull(actions, configuredTarget);
+    return configuredTarget;
+  }
+
+  @VisibleForTesting
+  public Iterable<Action> getActions() {
+    return Preconditions.checkNotNull(actions, configuredTarget);
+  }
+
+  /**
+   * Clears configured target data from this value, leaving only the artifact->generating action
+   * map.
+   *
+   * <p>Should only be used when user specifies --discard_analysis_cache. Must be called at most
+   * once per value, after which {@link #getConfiguredTarget} and {@link #getActions} cannot be
+   * called.
+   */
+  public void clear() {
+    Preconditions.checkNotNull(actions, configuredTarget);
+    configuredTarget = null;
+    actions = null;
+  }
+
+  @VisibleForTesting
+  public static SkyKey key(Label label, BuildConfiguration configuration) {
+    return key(new ConfiguredTargetKey(label, configuration));
+  }
+
+  static ImmutableList<SkyKey> keys(Iterable<ConfiguredTargetKey> lacs) {
+    ImmutableList.Builder<SkyKey> keys = ImmutableList.builder();
+    for (ConfiguredTargetKey lac : lacs) {
+      keys.add(key(lac));
+    }
+    return keys.build();
+  }
+
+  /**
+   * Returns a label of ConfiguredTargetValue.
+   */
+  @ThreadSafe
+  static Label extractLabel(SkyKey value) {
+    Object valueName = value.argument();
+    Preconditions.checkState(valueName instanceof ConfiguredTargetKey, valueName);
+    return ((ConfiguredTargetKey) valueName).getLabel();
+  }
+
+  @Override
+  public String toString() {
+    return "ConfiguredTargetValue: "
+        + configuredTarget + ", actions: " + (actions == null ? null : Iterables.toString(actions));
+  }
+}