| // 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.base.Objects; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable; |
| import com.google.devtools.build.lib.events.Location; |
| import com.google.devtools.build.lib.packages.NativeInfo; |
| import com.google.devtools.build.lib.packages.NativeProvider; |
| import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec; |
| import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec.VisibleForSerialization; |
| import com.google.devtools.build.lib.skylarkbuildapi.platform.ConstraintSettingInfoApi; |
| import com.google.devtools.build.lib.syntax.Printer; |
| import com.google.devtools.build.lib.util.Fingerprint; |
| import javax.annotation.Nullable; |
| |
| /** Provider for a platform constraint setting that is available to be fulfilled. */ |
| @Immutable |
| @AutoCodec |
| public class ConstraintSettingInfo extends NativeInfo implements ConstraintSettingInfoApi { |
| /** Name used in Skylark for accessing this provider. */ |
| public static final String SKYLARK_NAME = "ConstraintSettingInfo"; |
| |
| /** Skylark constructor and identifier for this provider. */ |
| public static final NativeProvider<ConstraintSettingInfo> PROVIDER = |
| new NativeProvider<ConstraintSettingInfo>(ConstraintSettingInfo.class, SKYLARK_NAME) {}; |
| |
| private final Label label; |
| @Nullable private final Label defaultConstraintValueLabel; |
| |
| @VisibleForSerialization |
| ConstraintSettingInfo(Label label, Label defaultConstraintValueLabel, Location location) { |
| super(PROVIDER, location); |
| |
| this.label = label; |
| this.defaultConstraintValueLabel = defaultConstraintValueLabel; |
| } |
| |
| @Override |
| public Label label() { |
| return label; |
| } |
| |
| @Override |
| public boolean hasDefaultConstraintValue() { |
| return defaultConstraintValueLabel != null; |
| } |
| |
| @Override |
| @Nullable |
| public ConstraintValueInfo defaultConstraintValue() { |
| if (!hasDefaultConstraintValue()) { |
| return null; |
| } |
| return ConstraintValueInfo.create(this, defaultConstraintValueLabel); |
| } |
| |
| /** Add this constraint setting to the given fingerprint. */ |
| public void addTo(Fingerprint fp) { |
| fp.addString(label.getCanonicalForm()); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (!(other instanceof ConstraintSettingInfo)) { |
| return false; |
| } |
| |
| ConstraintSettingInfo otherConstraint = (ConstraintSettingInfo) other; |
| return Objects.equal(label, otherConstraint.label); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(label); |
| } |
| |
| @Override |
| public void repr(Printer printer) { |
| printer.format("ConstraintSettingInfo(%s", label.toString()); |
| if (defaultConstraintValueLabel != null) { |
| printer.format(", default_constraint_value=%s", defaultConstraintValueLabel.toString()); |
| } |
| printer.append(")"); |
| } |
| |
| /** Returns a new {@link ConstraintSettingInfo} with the given data. */ |
| public static ConstraintSettingInfo create(Label constraintSetting) { |
| return create(constraintSetting, null, Location.BUILTIN); |
| } |
| |
| /** Returns a new {@link ConstraintSettingInfo} with the given data. */ |
| public static ConstraintSettingInfo create( |
| Label constraintSetting, Label defaultConstraintValue) { |
| return create(constraintSetting, defaultConstraintValue, Location.BUILTIN); |
| } |
| |
| /** Returns a new {@link ConstraintSettingInfo} with the given data. */ |
| public static ConstraintSettingInfo create( |
| Label constraintSetting, Label defaultConstraintValue, Location location) { |
| return new ConstraintSettingInfo(constraintSetting, defaultConstraintValue, location); |
| } |
| } |