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

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Here is the source code for com.facebook.buck.testutil.FakeFileHashCache.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.util.FileHashCache;
import com.google.common.collect.ImmutableMap;
import com.google.common.hash.HashCode;

import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Map;

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

    private final ImmutableMap<Path, HashCode> pathsToHashes;

    private FakeFileHashCache(Map<Path, HashCode> pathsToHashes) {
        this.pathsToHashes = ImmutableMap.copyOf(pathsToHashes);
    }

    public static FakeFileHashCache createFromStrings(Map<String, String> pathsToHashes) {
        ImmutableMap.Builder<Path, HashCode> builder = ImmutableMap.builder();
        for (Map.Entry<String, String> entry : pathsToHashes.entrySet()) {
            builder.put(Paths.get(entry.getKey()), HashCode.fromString(entry.getValue()));
        }
        return new FakeFileHashCache(builder.build());
    }

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

    @Override
    public HashCode get(Path path) {
        return pathsToHashes.get(path);
    }

}