| // Copyright 2023 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.auto.value.AutoValue; |
| import com.google.common.base.Strings; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.errorprone.annotations.CanIgnoreReturnValue; |
| import java.util.HashMap; |
| import java.util.Map; |
| import javax.annotation.Nullable; |
| |
| /** Proepeties set on a specific {@link PlatformInfo}. */ |
| @AutoValue |
| public abstract class PlatformProperties { |
| abstract ImmutableMap<String, String> properties(); |
| |
| public boolean isEmpty() { |
| return properties().isEmpty(); |
| } |
| |
| /** Returns a new {@link Builder} for creating a fresh {@link PlatformProperties} instance. */ |
| public static Builder builder() { |
| return new Builder(); |
| } |
| |
| /** Builder class to facilitate creating valid {@link PlatformProperties} instances. */ |
| public static final class Builder { |
| @Nullable private PlatformProperties parent = null; |
| private ImmutableMap<String, String> properties = ImmutableMap.of(); |
| |
| @CanIgnoreReturnValue |
| public Builder setParent(@Nullable PlatformProperties parent) { |
| this.parent = parent; |
| return this; |
| } |
| |
| /** Returns the current properties (but not any from the parent), for validation. */ |
| ImmutableMap<String, String> getProperties() { |
| return this.properties; |
| } |
| |
| @CanIgnoreReturnValue |
| public Builder setProperties(Map<String, String> properties) { |
| this.properties = ImmutableMap.copyOf(properties); |
| return this; |
| } |
| |
| public PlatformProperties build() { |
| ImmutableMap<String, String> properties = mergeParent(parent, this.properties); |
| |
| return new AutoValue_PlatformProperties(properties); |
| } |
| |
| @Nullable |
| private static ImmutableMap<String, String> mergeParent( |
| PlatformProperties parent, ImmutableMap<String, String> properties) { |
| if (parent == null || parent.isEmpty()) { |
| return properties; |
| } |
| |
| HashMap<String, String> result = new HashMap<>(); |
| if (parent != null && !parent.properties().isEmpty()) { |
| result.putAll(parent.properties()); |
| } |
| |
| if (!properties.isEmpty()) { |
| for (Map.Entry<String, String> entry : properties.entrySet()) { |
| if (Strings.isNullOrEmpty(entry.getValue())) { |
| result.remove(entry.getKey()); |
| } else { |
| result.put(entry.getKey(), entry.getValue()); |
| } |
| } |
| } |
| |
| return ImmutableMap.copyOf(result); |
| } |
| } |
| } |