external/storm-sqe/src/main/java/com/jwplayer/sqe/util/file/resource/ResourceFileSystem.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.jwplayer.sqe.util.file.resource;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;

import java.io.IOException;
import java.net.URISyntaxException;
import java.nio.file.*;
import java.nio.file.attribute.UserPrincipalLookupService;
import java.nio.file.spi.FileSystemProvider;
import java.util.Set;


public class ResourceFileSystem extends FileSystem {
    private static final String SEPARATOR = "/";
    private final ResourceFileSystemProvider provider;

    public ResourceFileSystem(ResourceFileSystemProvider provider) {
        this.provider = provider;
    }

    @Override
    public FileSystemProvider provider() {
        return provider;
    }

    @Override
    public void close() throws IOException {
        // do nothing
    }

    @Override
    public boolean isOpen() {
        return true;
    }

    @Override
    public boolean isReadOnly() {
        return true;
    }

    @Override
    public String getSeparator() {
        return SEPARATOR;
    }

    @Override
    public Iterable<Path> getRootDirectories() {
        throw new UnsupportedOperationException();
    }

    @Override
    public Iterable<FileStore> getFileStores() {
        return ImmutableList.of();
    }

    @Override
    public Set<String> supportedFileAttributeViews() {
        return ImmutableSet.of("basic");
    }

    @Override
    public Path getPath(String first, String... more) {
        try {
            if (more.length == 0) {
                return Paths.get(this.getClass().getResource(first).toURI());
            }
        } catch(URISyntaxException ex) {
            throw new RuntimeException(ex);
        }

        throw new UnsupportedOperationException("getPath only supports a single path string");
    }

    @Override
    public PathMatcher getPathMatcher(String syntaxAndPattern) {
        throw new UnsupportedOperationException();
    }

    @Override
    public UserPrincipalLookupService getUserPrincipalLookupService() {
        throw new UnsupportedOperationException();
    }

    @Override
    public WatchService newWatchService() throws IOException {
        throw new UnsupportedOperationException();
    }
}