// Copyright 2014 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.packages;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.packages.Attribute.ComputedDefault;
import com.google.devtools.build.lib.packages.BuildType.Selector;
import com.google.devtools.build.lib.packages.BuildType.SelectorList;
import com.google.devtools.build.lib.syntax.Type;
import com.google.devtools.build.lib.util.Preconditions;
import java.util.Collection;
import java.util.List;
import javax.annotation.Nullable;
/**
* {@link AttributeMap} implementation that returns raw attribute information as contained within
* a {@link Rule} via {@link #getRawAttributeValue}. In particular, configurable attributes
* of the form { config1: "value1", config2: "value2" } are passed through without being resolved
* to a final value when obtained via that method.
*/
public class RawAttributeMapper extends AbstractAttributeMapper {
RawAttributeMapper(
Package pkg, RuleClass ruleClass, Label ruleLabel, AttributeContainer attributes) {
super(pkg, ruleClass, ruleLabel, attributes);
}
public static RawAttributeMapper of(Rule rule) {
return new RawAttributeMapper(
rule.getPackage(),
rule.getRuleClassObject(),
rule.getLabel(),
rule.getAttributeContainer());
}
/**
* Variation of {@link #get} that merges the values of configurable lists together (with
* duplicates removed).
*
*
If the attribute isn't configurable (e.g. attr = [A, B]), returns
* its raw value.
*
*
Throws an {@link IllegalStateException} if the attribute isn't a list type.
*/
@Nullable
public Collection getMergedValues(String attributeName, Type> type) {
Preconditions.checkState(type instanceof Type.ListType);
if (!isConfigurable(attributeName)) {
return get(attributeName, type);
}
ImmutableSet.Builder mergedValues = ImmutableSet.builder();
for (Selector> selector : getSelectorList(attributeName, type).getSelectors()) {
for (List configuredList : selector.getEntries().values()) {
mergedValues.addAll(configuredList);
}
}
return mergedValues.build();
}
/**
* If the attribute is configurable for this rule instance, returns its configuration
* keys. Else returns an empty list.
*/
public Iterable