com.google.devtools.build.xcode.xcodegen.RelativePaths.java Source code

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Here is the source code for com.google.devtools.build.xcode.xcodegen.RelativePaths.java

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// Copyright 2014 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.xcode.xcodegen;

import static com.google.common.base.Preconditions.checkArgument;

import com.google.common.collect.ImmutableList;

import java.nio.file.FileSystem;
import java.nio.file.Path;
import java.util.List;

/**
 * Utility methods for working with relative {@link Path} objects.
 */
class RelativePaths {
    private RelativePaths() {
        throw new UnsupportedOperationException("static-only");
    }

    /**
     * Converts the given string to a {@code Path}, confirming it is relative.
     */
    static Path fromString(FileSystem fileSystem, String pathString) {
        Path path = fileSystem.getPath(pathString);
        checkArgument(!path.isAbsolute(), "Expected relative path but got: %s", path);
        return path;
    }

    /**
     * Converts each item in {@code pathStrings} using {@link #fromString(FileSystem, String)}.
     */
    static List<Path> fromStrings(FileSystem fileSystem, Iterable<String> pathStrings) {
        ImmutableList.Builder<Path> result = new ImmutableList.Builder<>();
        for (String pathString : pathStrings) {
            result.add(fromString(fileSystem, pathString));
        }
        return result.build();
    }
}