83 lines
2.6 KiB
Java
83 lines
2.6 KiB
Java
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// Copyright 2015 The Bazel Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package com.google.devtools.build.android;
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import com.google.devtools.common.options.Converter;
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import com.google.devtools.common.options.OptionsParsingException;
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import java.nio.file.FileSystems;
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import java.nio.file.Files;
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import java.nio.file.InvalidPathException;
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import java.nio.file.Path;
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/**
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* Some convenient converters used by android actions. Note: These are specific to android actions.
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*/
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public final class Converters {
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private static final Converter<String> IDENTITY_CONVERTER =
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new Converter<String>() {
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@Override
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public String convert(String input) {
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return input;
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}
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@Override
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public String getTypeDescription() {
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return "a string";
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}
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};
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/** Validating converter for Paths. A Path is considered valid if it resolves to a file. */
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public static class PathConverter implements Converter<Path> {
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private final boolean mustExist;
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public PathConverter() {
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this.mustExist = false;
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}
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protected PathConverter(boolean mustExist) {
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this.mustExist = mustExist;
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}
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@Override
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public Path convert(String input) throws OptionsParsingException {
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try {
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Path path = FileSystems.getDefault().getPath(input);
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if (mustExist && !Files.exists(path)) {
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throw new OptionsParsingException(
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String.format("%s is not a valid path: it does not exist.", input));
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}
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return path;
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} catch (InvalidPathException e) {
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throw new OptionsParsingException(
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String.format("%s is not a valid path: %s.", input, e.getMessage()), e);
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}
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}
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@Override
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public String getTypeDescription() {
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return "a valid filesystem path";
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}
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}
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/**
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* Validating converter for Paths. A Path is considered valid if it resolves to a file and exists.
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*/
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public static class ExistingPathConverter extends PathConverter {
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public ExistingPathConverter() {
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super(true);
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}
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}
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}
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