com.facebook.buck.versions.TargetGraphVersionTransformations.java Source code

Introduction

Here is the source code for com.facebook.buck.versions.TargetGraphVersionTransformations.java

Source

/*
 * Copyright 2016-present Facebook, Inc.
 *
 * 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.facebook.buck.versions;

import com.facebook.buck.model.BuildTarget;
import com.facebook.buck.rules.Description;
import com.facebook.buck.rules.TargetNode;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Iterables;

import java.lang.reflect.Field;
import java.util.Optional;

class TargetGraphVersionTransformations {

    public static final String VERSIONED_DEPS_FIELD_NAME = "versionedDeps";

    private TargetGraphVersionTransformations() {
    }

    public static boolean isVersionPropagator(TargetNode<?, ?> node) {
        return node.getDescription() instanceof VersionPropagator;
    }

    public static boolean isVersionRoot(TargetNode<?, ?> node) {
        return (node.getDescription() instanceof VersionRoot
                && ((VersionRoot<?>) node.getDescription()).isVersionRoot(node.getBuildTarget().getFlavors()));
    }

    public static Optional<TargetNode<VersionedAliasDescription.Arg, ?>> getVersionedNode(TargetNode<?, ?> node) {
        return node.castArg(VersionedAliasDescription.Arg.class);
    }

    private static Optional<Field> getVersionedDepsField(TargetNode<?, ?> node) {
        try {
            return Optional.of(node.getConstructorArg().getClass().getField(VERSIONED_DEPS_FIELD_NAME));
        } catch (NoSuchFieldException e) {
            return Optional.empty();
        }
    }

    @SuppressWarnings("unchecked")
    public static ImmutableMap<BuildTarget, Optional<Constraint>> getVersionedDeps(TargetNode<?, ?> node) {
        Optional<Field> versionedDepsField = getVersionedDepsField(node);
        if (versionedDepsField.isPresent()) {
            try {
                ImmutableMap<BuildTarget, Optional<Constraint>> versionedDeps = (ImmutableMap<BuildTarget, Optional<Constraint>>) versionedDepsField
                        .get().get(node.getConstructorArg());
                return versionedDeps;
            } catch (IllegalAccessException e) {
                throw new IllegalStateException(e);
            }
        }
        return ImmutableMap.of();
    }

    public static <A, B extends Description<A>> Iterable<BuildTarget> getDeps(TargetNode<A, B> node) {
        return Iterables.concat(node.getDeclaredDeps(), node.getExtraDeps(), getVersionedDeps(node).keySet());
    }

}