com.facebook.buck.artifact_cache.AbstractArtifactCacheEventFactory.java Source code

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Here is the source code for com.facebook.buck.artifact_cache.AbstractArtifactCacheEventFactory.java

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/*
 * Copyright 2015-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.artifact_cache;

import com.facebook.buck.core.model.BuildTarget;
import com.facebook.buck.core.model.EmptyTargetConfiguration;
import com.facebook.buck.core.model.TargetConfiguration;
import com.facebook.buck.core.model.TargetConfigurationSerializer;
import com.facebook.buck.core.model.UnconfiguredBuildTarget;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableMap;
import java.util.Optional;
import java.util.function.Function;
import javax.annotation.Nullable;

public abstract class AbstractArtifactCacheEventFactory implements ArtifactCacheEventFactory {
    private static final String TARGET_KEY = "TARGET";
    private static final String CONFIGURATION_KEY = "CONFIGURATION";

    private final Function<String, UnconfiguredBuildTarget> unconfiguredBuildTargetFactory;
    private final TargetConfigurationSerializer targetConfigurationSerializer;

    protected AbstractArtifactCacheEventFactory(
            Function<String, UnconfiguredBuildTarget> unconfiguredBuildTargetFactory,
            TargetConfigurationSerializer targetConfigurationSerializer) {
        this.unconfiguredBuildTargetFactory = unconfiguredBuildTargetFactory;
        this.targetConfigurationSerializer = targetConfigurationSerializer;
    }

    protected final Optional<BuildTarget> getTarget(ImmutableMap<String, String> metadata) {
        return getTarget(unconfiguredBuildTargetFactory, targetConfigurationSerializer, metadata);
    }

    public static Optional<BuildTarget> getTarget(
            Function<String, UnconfiguredBuildTarget> unconfiguredBuildTargetFactory,
            TargetConfigurationSerializer targetConfigurationSerializer, ImmutableMap<String, String> metadata) {
        return metadata.containsKey(TARGET_KEY)
                ? getTarget(unconfiguredBuildTargetFactory, metadata.get(TARGET_KEY),
                        getTargetConfigurationFromMetadata(targetConfigurationSerializer, metadata))
                : Optional.empty();
    }

    private static TargetConfiguration getTargetConfigurationFromMetadata(
            TargetConfigurationSerializer targetConfigurationSerializer, ImmutableMap<String, String> metadata) {
        String configuration = metadata.get(CONFIGURATION_KEY);
        if (Strings.isNullOrEmpty(configuration)) {
            return EmptyTargetConfiguration.INSTANCE;
        }
        return targetConfigurationSerializer.deserialize(configuration);
    }

    public static Optional<BuildTarget> getTarget(
            Function<String, UnconfiguredBuildTarget> unconfiguredBuildTargetFactory, @Nullable String target,
            TargetConfiguration targetConfiguration) {
        if (target == null) {
            return Optional.empty();
        } else {
            return Optional.of(unconfiguredBuildTargetFactory.apply(target).configure(targetConfiguration));
        }
    }
}