1 files changed, 73 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/platform/ConstraintValueInfo.java b/src/main/java/com/google/devtools/build/lib/analysis/platform/ConstraintValueInfo.java
new file mode 100644
index 0000000000..9e58126264
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/analysis/platform/ConstraintValueInfo.java
@@ -0,0 +1,73 @@
+// Copyright 2017 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.analysis.platform;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.devtools.build.lib.cmdline.Label;
+import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
+import com.google.devtools.build.lib.packages.ClassObjectConstructor;
+import com.google.devtools.build.lib.packages.NativeClassObjectConstructor;
+import com.google.devtools.build.lib.packages.SkylarkClassObject;
+import com.google.devtools.build.lib.packages.SkylarkProviderIdentifier;
+import com.google.devtools.build.lib.skylarkinterface.SkylarkModule;
+import com.google.devtools.build.lib.skylarkinterface.SkylarkModuleCategory;
+
+/** Provider for a platform constraint value that fulfills a {@link ConstraintSettingInfo}. */
+@SkylarkModule(
+  name = "ConstraintValueProvider",
+  doc = "A value for a constraint setting that can be used to define a platform.",
+  category = SkylarkModuleCategory.PROVIDER
+)
+@Immutable
+public class ConstraintValueInfo extends SkylarkClassObject {
+
+  /** Name used in Skylark for accessing this provider. */
+  public static final String SKYLARK_NAME = "ConstraintValueInfo";
+
+  /** Skylark constructor and identifier for this provider. */
+  public static final ClassObjectConstructor SKYLARK_CONSTRUCTOR =
+      new NativeClassObjectConstructor(SKYLARK_NAME) {};
+
+  /** Identifier used to retrieve this provider from rules which export it. */
+  public static final SkylarkProviderIdentifier SKYLARK_IDENTIFIER =
+      SkylarkProviderIdentifier.forKey(SKYLARK_CONSTRUCTOR.getKey());
+
+  private final ConstraintSettingInfo constraint;
+  private final Label label;
+
+  private ConstraintValueInfo(ConstraintSettingInfo constraint, Label label) {
+    super(
+        SKYLARK_CONSTRUCTOR,
+        ImmutableMap.<String, Object>of(
+            "constraint", constraint,
+            "label", label));
+
+    this.constraint = constraint;
+    this.label = label;
+  }
+
+  public ConstraintSettingInfo constraint() {
+    return constraint;
+  }
+
+  public Label label() {
+    return label;
+  }
+
+  /** Returns a new {@link ConstraintValueInfo} with the given data. */
+  public static ConstraintValueInfo create(ConstraintSettingInfo constraint, Label value) {
+    return new ConstraintValueInfo(constraint, value);
+  }
+}