Aspects can get information from their base rule.
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MOS_MIGRATED_REVID=102126786
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/AspectWithParameters.java b/src/main/java/com/google/devtools/build/lib/analysis/AspectWithParameters.java
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index 0000000..0cffc4c
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+++ b/src/main/java/com/google/devtools/build/lib/analysis/AspectWithParameters.java
@@ -0,0 +1,79 @@
+// Copyright 2015 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.analysis;
+
+import com.google.devtools.build.lib.packages.AspectParameters;
+
+import java.util.Objects;
+
+/**
+ * Wrapper around {@link ConfiguredAspectFactory} class and {@link AspectParameters}. Aspects are
+ * created with help of aspect factory instances and parameters are used to configure them, so we
+ * have to keep them together.
+ */
+public final class AspectWithParameters {
+ // 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 final AspectParameters parameters;
+
+ public AspectWithParameters(
+ Class<? extends ConfiguredAspectFactory> aspect, AspectParameters parameters) {
+ this.aspectFactory = aspect;
+ this.parameters = parameters;
+ }
+
+ public AspectWithParameters(Class<? extends ConfiguredAspectFactory> aspect) {
+ this.aspectFactory = aspect;
+ this.parameters = AspectParameters.EMPTY;
+ }
+
+ /**
+ * Returns the aspectFactory required for building the aspect.
+ */
+ public Class<? extends ConfiguredAspectFactory> getAspectFactory() {
+ return aspectFactory;
+ }
+
+ /**
+ * Returns parameters for evaluation of the aspect.
+ */
+ public AspectParameters getParameters() {
+ return parameters;
+ }
+
+ @Override
+ public boolean equals(Object other) {
+ if (this == other) {
+ return true;
+ }
+ if (!(other instanceof AspectWithParameters)) {
+ return false;
+ }
+ AspectWithParameters that = (AspectWithParameters) other;
+ return Objects.equals(this.aspectFactory, that.aspectFactory)
+ && Objects.equals(this.parameters, that.parameters);
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(aspectFactory, parameters);
+ }
+
+ @Override
+ public String toString() {
+ return String.format("AspectWithParameters %s(%s)", aspectFactory, parameters);
+ }
+}
