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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.java;
import com.google.common.collect.ImmutableList;
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.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.packages.BuildType;
import java.util.List;
/**
* Information about the JDK used by the <code>java_*</code> rules.
*/
@Immutable
public final class JavaToolchainProvider implements TransitiveInfoProvider {
private final ImmutableList<String> javacOptions;
private final ImmutableList<String> javacJvmOptions;
public JavaToolchainProvider(JavaToolchainData data, List<String> defaultJavacFlags,
List<String> defaultJavacJvmOpts) {
super();
// merges the defaultJavacFlags from
// {@link JavaConfiguration} with the flags from the {@code java_toolchain} rule.
this.javacOptions = ImmutableList.<String>builder()
.addAll(data.getJavacOptions())
.addAll(defaultJavacFlags)
.build();
// merges the defaultJavaBuilderJvmFlags from
// {@link JavaConfiguration} with the flags from the {@code java_toolchain} rule.
this.javacJvmOptions = ImmutableList.<String>builder()
.addAll(data.getJavacJvmOptions())
.addAll(defaultJavacJvmOpts)
.build();
}
/**
* @return the list of default options for the java compiler
*/
public ImmutableList<String> getJavacOptions() {
return javacOptions;
}
/**
* @return the list of default options for the JVM running the java compiler
*/
public ImmutableList<String> getJavacJvmOptions() {
return javacJvmOptions;
}
/**
* An helper method to construct the list of javac options.
*
* @param ruleContext The rule context of the current rule.
* @return the list of flags provided by the {@code java_toolchain} rule merged with the one
* provided by the {@link JavaConfiguration} fragment.
*/
public static List<String> getDefaultJavacOptions(RuleContext ruleContext) {
JavaToolchainProvider javaToolchain =
ruleContext.getPrerequisite(":java_toolchain", Mode.TARGET, JavaToolchainProvider.class);
if (javaToolchain == null) {
ruleContext.ruleError("The --java_toolchain option does not point to a java_toolchain rule.");
return ImmutableList.of();
}
return javaToolchain.getJavacOptions();
}
/**
* An helper method to construct the list of options to pass to the JVM running the java compiler.
*
* @param ruleContext The rule context of the current rule.
* @return the list of flags provided by the {@code java_toolchain} rule merged with the one
* provided by the {@link JavaConfiguration} fragment.
*/
public static List<String> getDefaultJavacJvmOptions(RuleContext ruleContext) {
if (!ruleContext.getRule().isAttrDefined(":java_toolchain", BuildType.LABEL)) {
// As some rules might not have java_toolchain dependency (e.g., java_import), we silently
// ignore it. The rules needing it will error in #getDefaultJavacOptions(RuleContext) anyway.
return ImmutableList.of();
}
JavaToolchainProvider javaToolchain =
ruleContext.getPrerequisite(":java_toolchain", Mode.TARGET, JavaToolchainProvider.class);
if (javaToolchain == null) {
ruleContext.ruleError("The --java_toolchain option does not point to a java_toolchain rule.");
return ImmutableList.of();
}
return javaToolchain.getJavacJvmOptions();
}
}
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