| // Copyright 2017 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.analysis.platform; |
| |
| import com.google.common.collect.Iterables; |
| import com.google.devtools.build.lib.analysis.ProviderCollection; |
| import javax.annotation.Nullable; |
| |
| /** Utility methods to help locate platform-related providers. */ |
| public class PlatformProviderUtils { |
| |
| /** Retrieves and casts the {@link PlatformInfo} provider from the given target. */ |
| @Nullable |
| public static PlatformInfo platform(@Nullable ProviderCollection target) { |
| if (target == null) { |
| return null; |
| } |
| return target.get(PlatformInfo.PROVIDER); |
| } |
| |
| /** Retrieves and casts {@link PlatformInfo} providers from the given targets. */ |
| public static Iterable<PlatformInfo> platforms(Iterable<? extends ProviderCollection> targets) { |
| return Iterables.transform(targets, PlatformProviderUtils::platform); |
| } |
| |
| /** Retrieves and casts the {@link ConstraintSettingInfo} provider from the given target. */ |
| @Nullable |
| public static ConstraintSettingInfo constraintSetting(@Nullable ProviderCollection target) { |
| if (target == null) { |
| return null; |
| } |
| return target.get(ConstraintSettingInfo.PROVIDER); |
| } |
| |
| /** Retrieves and casts {@link ConstraintSettingInfo} providers from the given targets. */ |
| public static Iterable<ConstraintSettingInfo> constraintSettings( |
| Iterable<? extends ProviderCollection> targets) { |
| return Iterables.transform(targets, PlatformProviderUtils::constraintSetting); |
| } |
| |
| /** Retrieves and casts the {@link ConstraintValueInfo} provider from the given target. */ |
| @Nullable |
| public static ConstraintValueInfo constraintValue(@Nullable ProviderCollection target) { |
| if (target == null) { |
| return null; |
| } |
| return target.get(ConstraintValueInfo.PROVIDER); |
| } |
| |
| /** Returns if a target provides {@link ConstraintValueInfo}. * */ |
| public static boolean hasConstraintValue(ProviderCollection target) { |
| return target.get(ConstraintValueInfo.PROVIDER) != null; |
| } |
| |
| /** Retrieves and casts {@link ConstraintValueInfo} providers from the given targets. */ |
| public static Iterable<ConstraintValueInfo> constraintValues( |
| Iterable<? extends ProviderCollection> targets) { |
| return Iterables.transform(targets, PlatformProviderUtils::constraintValue); |
| } |
| |
| /** |
| * Retrieves and casts the {@link DeclaredToolchainInfo} from {@link |
| * com.google.devtools.build.lib.rules.platform.Toolchain} rule. |
| * |
| * <p>Returns null if the rule isn't a toolchain. |
| */ |
| @Nullable |
| public static DeclaredToolchainInfo declaredToolchainInfo(@Nullable ProviderCollection target) { |
| if (target == null) { |
| return null; |
| } |
| return target.getProvider(DeclaredToolchainInfo.class); |
| } |
| |
| /** Retrieves and casts the {@link ToolchainInfo} provider from the given target. */ |
| @Nullable |
| public static ToolchainInfo toolchain(@Nullable ProviderCollection target) { |
| if (target == null) { |
| return null; |
| } |
| return target.get(ToolchainInfo.PROVIDER); |
| } |
| |
| /** Retrieves and casts the {@link ToolchainTypeInfo} provider from the given target. */ |
| public static ToolchainTypeInfo toolchainType(ProviderCollection target) { |
| return target.get(ToolchainTypeInfo.PROVIDER); |
| } |
| } |