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100 lines
3.7 KiB
Java
100 lines
3.7 KiB
Java
// Copyright 2016 The Domain Registry 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 google.registry.tools.params;
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import static com.google.common.base.Preconditions.checkArgument;
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import static com.google.common.base.Preconditions.checkNotNull;
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import com.beust.jcommander.ParameterException;
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import com.google.re2j.Pattern;
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import java.net.URI;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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/** Filesystem path CLI parameter converter/validator. */
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public class PathParameter extends ParameterConverterValidator<Path> {
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public PathParameter() {
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super("not a valid path");
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}
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/** Heuristic for determining if a path value appears to be a {@link URI}. */
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private static final Pattern URI_PATTERN = Pattern.compile("[a-z][-+.a-z]+:[^:]");
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@Override
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public final Path convert(String value) {
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checkArgument(!checkNotNull(value).isEmpty());
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if (URI_PATTERN.matcher(value).lookingAt()) {
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return Paths.get(URI.create(value)).normalize();
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}
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return Paths.get(value).normalize();
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}
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/** {@linkplain PathParameter} when you want an output file parameter. */
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public static final class OutputFile extends PathParameter {
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@Override
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public void validate(String name, String value) throws ParameterException {
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super.validate(name, value);
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Path file = convert(value).toAbsolutePath();
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if (Files.exists(file)) {
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if (Files.isDirectory(file)) {
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throw new ParameterException(String.format("%s is a directory: %s", name, file));
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}
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if (!Files.isWritable(file)) {
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throw new ParameterException(String.format("%s not writable: %s", name, file));
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}
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} else {
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Path dir = file.getParent();
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if (!Files.exists(dir)) {
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throw new ParameterException(String.format("%s parent dir doesn't exist: %s", name, dir));
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}
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if (!Files.isDirectory(dir)) {
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throw new ParameterException(String.format("%s parent is non-directory: %s", name, dir));
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}
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}
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}
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}
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/** {@linkplain PathParameter} when you want an output directory parameter. */
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public static final class OutputDirectory extends PathParameter {
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@Override
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public void validate(String name, String value) throws ParameterException {
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super.validate(name, value);
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Path file = convert(value).toAbsolutePath();
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if (!Files.isDirectory(file)) {
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throw new ParameterException(String.format("%s not a directory: %s", name, file));
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}
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}
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}
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/** {@linkplain PathParameter} when you want an input file that must exist. */
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public static final class InputFile extends PathParameter {
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@Override
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public void validate(String name, String value) throws ParameterException {
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super.validate(name, value);
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Path file = convert(value).toAbsolutePath();
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if (!Files.exists(file)) {
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throw new ParameterException(String.format("%s not found: %s", name, file));
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}
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if (!Files.isReadable(file)) {
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throw new ParameterException(String.format("%s not readable: %s", name, file));
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}
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if (Files.isDirectory(file)) {
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throw new ParameterException(String.format("%s is a directory: %s", name, file));
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}
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}
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}
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}
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