com.facebook.buck.jvm.java.autodeps.JavaLibrarySymbolsFinder.java Source code

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Here is the source code for com.facebook.buck.jvm.java.autodeps.JavaLibrarySymbolsFinder.java

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/*
 * 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.jvm.java.autodeps;

import com.facebook.buck.io.ProjectFilesystem;
import com.facebook.buck.jvm.java.JavaFileParser;
import com.facebook.buck.rules.PathSourcePath;
import com.facebook.buck.rules.RuleKeyObjectSink;
import com.facebook.buck.rules.SourcePath;
import com.facebook.buck.util.MoreCollectors;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableSortedSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Ordering;

import java.nio.file.Path;

final class JavaLibrarySymbolsFinder implements JavaSymbolsRule.SymbolsFinder {

    private final ImmutableSortedSet<SourcePath> srcs;

    private final JavaFileParser javaFileParser;

    private final boolean shouldRecordRequiredSymbols;

    JavaLibrarySymbolsFinder(ImmutableSortedSet<SourcePath> srcs, JavaFileParser javaFileParser,
            boolean shouldRecordRequiredSymbols) {
        // Avoid all the construction in the common case where all srcs are instances of PathSourcePath.
        this.srcs = Iterables.all(srcs, PathSourcePath.class::isInstance) ? srcs
                : srcs.stream().filter(PathSourcePath.class::isInstance)
                        .collect(MoreCollectors.toImmutableSortedSet(Ordering.natural()));
        this.javaFileParser = javaFileParser;
        this.shouldRecordRequiredSymbols = shouldRecordRequiredSymbols;
    }

    @Override
    public Symbols extractSymbols() {
        ImmutableSortedSet<Path> absolutePaths = srcs.stream().map(src -> {
            // This should be enforced by the constructor.
            Preconditions.checkState(src instanceof PathSourcePath);
            PathSourcePath sourcePath = (PathSourcePath) src;
            ProjectFilesystem filesystem = sourcePath.getFilesystem();
            Path absolutePath = filesystem.resolve(sourcePath.getRelativePath());
            return absolutePath;
        }).collect(MoreCollectors.toImmutableSortedSet(Ordering.natural()));
        return SymbolExtractor.extractSymbols(javaFileParser, shouldRecordRequiredSymbols, absolutePaths);
    }

    @Override
    public void appendToRuleKey(RuleKeyObjectSink sink) {
        sink.setReflectively("srcs", srcs).setReflectively("recordRequires", shouldRecordRequiredSymbols);
    }
}