gobblin.util.filesystem.FileSystemKey.java Source code

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Here is the source code for gobblin.util.filesystem.FileSystemKey.java

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/*
 * 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 gobblin.util.filesystem;

import java.net.URI;
import java.net.URISyntaxException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;

import com.google.common.base.Strings;

import gobblin.broker.iface.SharedResourceKey;

import lombok.Getter;

@Getter
public class FileSystemKey implements SharedResourceKey {

    private final URI uri;
    private final Configuration configuration;

    public FileSystemKey(URI uri, Configuration configuration) {
        this.configuration = configuration;
        this.uri = resolveURI(uri, configuration);
    }

    private URI resolveURI(URI uri, Configuration configuration) {
        String scheme = uri.getScheme();
        String authority = uri.getAuthority();

        if (scheme == null && authority == null) { // use default FS
            return FileSystem.getDefaultUri(configuration);
        }

        if (scheme != null && authority == null) { // no authority
            URI defaultUri = FileSystem.getDefaultUri(configuration);
            if (scheme.equals(defaultUri.getScheme()) // if scheme matches default
                    && defaultUri.getAuthority() != null) { // & default has authority
                return defaultUri; // return default
            }
        }

        try {
            return new URI(scheme, Strings.nullToEmpty(authority), "/", null, null);
        } catch (URISyntaxException use) {
            // This should never happen
            throw new RuntimeException(use);
        }
    }

    @Override
    public String toConfigurationKey() {
        return this.uri.toString();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        FileSystemKey that = (FileSystemKey) o;

        return uri == null ? that.uri == null : uri.equals(that.uri);
    }

    @Override
    public int hashCode() {
        return uri != null ? uri.hashCode() : 0;
    }
}