com.google.devtools.build.android.UnvalidatedAndroidDirectories.java Source code

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Here is the source code for com.google.devtools.build.android.UnvalidatedAndroidDirectories.java

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// Copyright 2016 The Bazel Authors. All rights reserved.
//
// 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.google.devtools.build.android;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableList;
import java.io.IOException;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Objects;
import java.util.regex.Pattern;

/**
 * Android resource and asset directories that can be parsed.
 */
public class UnvalidatedAndroidDirectories {

    private static final Pattern VALID_REGEX = Pattern.compile(".*:.*");

    public static final String EXPECTED_FORMAT = "resources[#resources]:assets[#assets]";

    public static UnvalidatedAndroidDirectories valueOf(String text) {
        return valueOf(text, FileSystems.getDefault());
    }

    @VisibleForTesting
    static UnvalidatedAndroidDirectories valueOf(String text, FileSystem fileSystem) {
        if (!VALID_REGEX.matcher(text).find()) {
            throw new IllegalArgumentException(text + " is not in the format '" + EXPECTED_FORMAT + "'");
        }
        String[] parts = text.split(":");
        return new UnvalidatedAndroidDirectories(
                parts.length > 0 ? splitPaths(parts[0], fileSystem) : ImmutableList.<Path>of(),
                parts.length > 1 ? splitPaths(parts[1], fileSystem) : ImmutableList.<Path>of());
    }

    protected static ImmutableList<Path> splitPaths(String pathsString, FileSystem fileSystem) {
        if (pathsString.length() == 0) {
            return ImmutableList.of();
        }
        ImmutableList.Builder<Path> paths = new ImmutableList.Builder<>();
        for (String pathString : pathsString.split("#")) {
            paths.add(exists(fileSystem.getPath(pathString)));
        }
        return paths.build();
    }

    protected static Path exists(Path path) {
        if (!Files.exists(path)) {
            throw new IllegalArgumentException(path + " does not exist");
        }
        return path;
    }

    protected final ImmutableList<Path> assetDirs;
    protected final ImmutableList<Path> resourceDirs;

    public UnvalidatedAndroidDirectories(ImmutableList<Path> resourceDirs, ImmutableList<Path> assetDirs) {
        this.resourceDirs = resourceDirs;
        this.assetDirs = assetDirs;
    }

    void walk(final AndroidDataPathWalker pathWalker) throws IOException {
        for (Path path : resourceDirs) {
            pathWalker.walkResources(path);
        }
        for (Path path : assetDirs) {
            pathWalker.walkAssets(path);
        }
    }

    @Override
    public String toString() {
        return String.format("UnvalidatedAndroidDirectories(%s, %s)", resourceDirs, assetDirs);
    }

    @Override
    public int hashCode() {
        return Objects.hash(resourceDirs, assetDirs);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (!(obj instanceof UnvalidatedAndroidDirectories)) {
            return false;
        }
        UnvalidatedAndroidDirectories other = (UnvalidatedAndroidDirectories) obj;
        return Objects.equals(other.resourceDirs, resourceDirs) && Objects.equals(other.assetDirs, assetDirs);
    }

}