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// Copyright 2022 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.rules.java;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static com.google.devtools.build.lib.packages.Type.STRING_LIST;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Streams;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
import com.google.devtools.build.lib.collect.nestedset.Depset;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.collect.nestedset.Order;
import com.google.devtools.build.lib.packages.AttributeMap;
import com.google.devtools.build.lib.starlarkbuildapi.java.JavaModuleFlagsProviderApi;
import java.util.Collection;
import java.util.List;
import java.util.stream.Stream;
/**
* Provides information about {@code --add-exports=} and {@code --add-opens=} flags for Java
* targets.
*/
final class JavaModuleFlagsProvider implements TransitiveInfoProvider, JavaModuleFlagsProviderApi {
private final NestedSet<String> addExports;
private final NestedSet<String> addOpens;
public NestedSet<String> addExports() {
return addExports;
}
public NestedSet<String> addOpens() {
return addOpens;
}
@Override
public Depset /*String*/ getAddExports() {
return Depset.of(String.class, addExports);
}
@Override
public Depset /*String*/ getAddOpens() {
return Depset.of(String.class, addOpens);
}
public JavaModuleFlagsProvider(NestedSet<String> addExports, NestedSet<String> addOpens) {
this.addExports = addExports;
this.addOpens = addOpens;
}
public static final JavaModuleFlagsProvider EMPTY =
new JavaModuleFlagsProvider(
NestedSetBuilder.emptySet(Order.STABLE_ORDER),
NestedSetBuilder.emptySet(Order.STABLE_ORDER));
public static JavaModuleFlagsProvider merge(Collection<JavaModuleFlagsProvider> providers) {
return create(ImmutableList.of(), ImmutableList.of(), providers.stream());
}
public static JavaModuleFlagsProvider create(
List<String> addExports, List<String> addOpens, Stream<JavaModuleFlagsProvider> transitive) {
NestedSetBuilder<String> addExportsBuilder = NestedSetBuilder.stableOrder();
NestedSetBuilder<String> addOpensBuilder = NestedSetBuilder.stableOrder();
addExportsBuilder.addAll(addExports);
addOpensBuilder.addAll(addOpens);
transitive.forEach(
provider -> {
addExportsBuilder.addTransitive(provider.addExports());
addOpensBuilder.addTransitive(provider.addOpens());
});
if (addExportsBuilder.isEmpty() && addOpensBuilder.isEmpty()) {
return EMPTY;
}
return new JavaModuleFlagsProvider(addExportsBuilder.build(), addOpensBuilder.build());
}
public static JavaModuleFlagsProvider create(
RuleContext ruleContext, Stream<JavaModuleFlagsProvider> transitive) {
AttributeMap attributes = ruleContext.attributes();
return create(
attributes.getOrDefault("add_exports", STRING_LIST, ImmutableList.of()),
attributes.getOrDefault("add_opens", STRING_LIST, ImmutableList.of()),
transitive);
}
public static ImmutableList<String> toFlags(List<String> addExports, List<String> addOpens) {
return Streams.concat(
addExports.stream().map(x -> String.format("--add-exports=%s=ALL-UNNAMED", x)),
addOpens.stream().map(x -> String.format("--add-opens=%s=ALL-UNNAMED", x)))
.collect(toImmutableList());
}
public ImmutableList<String> toFlags() {
return toFlags(addExports().toList(), addOpens().toList());
}
}