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// 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.rules.objc;
import com.google.devtools.build.lib.analysis.RuleConfiguredTarget.Mode;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.packages.BuildType;
import com.google.devtools.build.lib.rules.objc.J2ObjcSource.SourceType;
/**
* This provider is exported by java_library rules to supply J2ObjC-translated ObjC sources to
* objc_binary for compilation and linking.
*/
@Immutable
public final class J2ObjcSrcsProvider implements TransitiveInfoProvider {
private final NestedSet<J2ObjcSource> srcs;
private final NestedSet<String> entryClasses;
private final boolean hasProtos;
/**
* A builder for J2ObjCSrcsProvider.
*/
public static class Builder {
private final NestedSetBuilder<J2ObjcSource> srcsBuilder = NestedSetBuilder.stableOrder();
private final NestedSetBuilder<String> entryClassesBuilder = NestedSetBuilder.stableOrder();
private boolean hasProtos = false;
/**
* Constructs a new, empty J2ObjCSrcsProvider builder.
*/
public Builder() {}
/**
* Transitively adds the given {@link J2ObjcSrcsProvider}
* and all its properties to this builder.
*
* @param provider the J2ObjcSrcsProvider to add
* @return this builder
*/
public Builder addTransitive(J2ObjcSrcsProvider provider) {
srcsBuilder.addTransitive(provider.getSrcs());
entryClassesBuilder.addTransitive(provider.getEntryClasses());
hasProtos |= provider.hasProtos();
return this;
}
/**
* Transitively adds all the J2ObjcSrcsProviders and all their properties
* that can be reached through the "deps", "exports" and "runtime_deps" attributes.
*
* @param ruleContext the rule context
* @return this builder
*/
public Builder addTransitiveJ2ObjcSrcs(RuleContext ruleContext) {
return addTransitiveJ2ObjcSrcs(ruleContext, "deps")
.addTransitiveJ2ObjcSrcs(ruleContext, "exports")
.addTransitiveJ2ObjcSrcs(ruleContext, "runtime_deps");
}
/**
* Transitively adds the J2ObjCSrcsProviders of a given attribute to this Builder.
*
* @param ruleContext the rule context
* @param attribute the attribute to which to add sources
* @return this builder
*/
public Builder addTransitiveJ2ObjcSrcs(RuleContext ruleContext, String attribute) {
if (ruleContext.attributes().has(attribute, BuildType.LABEL_LIST)) {
for (J2ObjcSrcsProvider provider :
ruleContext.getPrerequisites(attribute, Mode.TARGET, J2ObjcSrcsProvider.class)) {
addTransitive(provider);
}
}
return this;
}
/**
* Adds the given {@link J2ObjcSource} to this builder.
*
* @param source the source to add
* @return this builder
*/
public Builder addSource(J2ObjcSource source) {
srcsBuilder.add(source);
hasProtos |= source.getSourceType() == SourceType.PROTO;
return this;
}
/**
* Adds the given entry classes to this builder. See {@link #getEntryClasses()}.
*
* @param entryClasses the entry classes to add
* @return this builder
*/
public Builder addEntryClasses(Iterable<String> entryClasses) {
entryClassesBuilder.addAll(entryClasses);
return this;
}
/**
* Builds a J2ObjCSrcsProvider from the information in this builder.
*
* @return the J2ObjCSrcsProvider to be built
*/
public J2ObjcSrcsProvider build() {
return new J2ObjcSrcsProvider(srcsBuilder.build(), entryClassesBuilder.build(), hasProtos);
}
}
/**
* Constructs a new J2ObjCSrcsProvider that contains all the information
* that can be transitively reached through the "deps" attribute of the given rule context.
*
* @param ruleContext the rule context in which to look for deps
*/
public static J2ObjcSrcsProvider buildFrom(RuleContext ruleContext) {
return new Builder().addTransitiveJ2ObjcSrcs(ruleContext).build();
}
/**
* Constructs a {@link J2ObjcSrcsProvider} to supply J2ObjC-translated ObjC sources to
* objc_binary for compilation and linking.
*
* @param srcs a nested set of {@link J2ObjcSource}s containing translated source files
* @param entryClasses a set of names of Java classes to used as entry point for J2ObjC dead code
* analysis. The Java class names should be in canonical format as defined by the Java
* Language Specification.
* @param hasProtos whether the translated files in this provider have J2ObjC proto files
*/
private J2ObjcSrcsProvider(NestedSet<J2ObjcSource> srcs, NestedSet<String> entryClasses,
boolean hasProtos) {
this.srcs = srcs;
this.entryClasses = entryClasses;
this.hasProtos = hasProtos;
}
public NestedSet<J2ObjcSource> getSrcs() {
return srcs;
}
/**
* Returns a set of entry classes specified on attribute entry_classes of j2objc_library targets
* transitively.
*/
public NestedSet<String> getEntryClasses() {
return entryClasses;
}
/**
* Returns whether the translated source files in the provider has proto files.
*/
public boolean hasProtos() {
return hasProtos;
}
}
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