com.facebook.buck.testutil.FakeProjectFileHashCache.java Source code

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Here is the source code for com.facebook.buck.testutil.FakeProjectFileHashCache.java

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/*
 * Copyright 2013-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.testutil;

import com.facebook.buck.io.ArchiveMemberPath;
import com.facebook.buck.io.filesystem.ProjectFilesystem;
import com.facebook.buck.util.cache.ProjectFileHashCache;
import com.google.common.hash.HashCode;
import java.io.IOException;
import java.nio.file.NoSuchFileException;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

/** FileHashCache that is populated with a fixed set of entries. */
public class FakeProjectFileHashCache implements ProjectFileHashCache {

    private final ProjectFilesystem filesystem;
    private final Map<Path, HashCode> pathsToHashes;

    public FakeProjectFileHashCache(ProjectFilesystem filesystem, Map<Path, HashCode> pathsToHashes) {
        this.filesystem = filesystem;
        this.pathsToHashes = pathsToHashes;
    }

    public static FakeProjectFileHashCache createFromStrings(ProjectFilesystem filesystem,
            Map<String, String> pathsToHashes) {
        Map<Path, HashCode> cachedValues = new HashMap<>();
        for (Map.Entry<String, String> entry : pathsToHashes.entrySet()) {
            cachedValues.put(filesystem.getPath(entry.getKey()), HashCode.fromString(entry.getValue()));
        }
        return new FakeProjectFileHashCache(filesystem, cachedValues);
    }

    @Override
    public ProjectFilesystem getFilesystem() {
        return filesystem;
    }

    @Override
    public boolean willGet(Path path) {
        return pathsToHashes.containsKey(path);
    }

    @Override
    public boolean willGet(ArchiveMemberPath archiveMemberPath) {
        return false;
    }

    @Override
    public boolean isIgnored(Path path) {
        return false;
    }

    @Override
    public void invalidate(Path path) {
        pathsToHashes.remove(path);
    }

    @Override
    public void invalidateAll() {
        pathsToHashes.clear();
    }

    @Override
    public HashCode get(Path path) throws IOException {
        HashCode hashCode = pathsToHashes.get(path);
        if (hashCode == null) {
            throw new NoSuchFileException(path.toString());
        }
        return hashCode;
    }

    @Override
    public long getSize(Path path) throws IOException {
        throw new NoSuchFileException(path.toString());
    }

    @Override
    public Optional<HashCode> getIfPresent(Path path) {
        return Optional.ofNullable(pathsToHashes.get(path));
    }

    @Override
    public HashCode get(ArchiveMemberPath archiveMemberPath) throws IOException {
        throw new NoSuchFileException(archiveMemberPath.toString());
    }

    @Override
    public void set(Path path, HashCode hashCode) {
        pathsToHashes.put(path, hashCode);
    }

    public boolean contains(Path path) {
        return pathsToHashes.containsKey(path);
    }
}