FsUrlConnection.java
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上传日期:2018-01-08
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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 org.apache.hadoop.fs;
- import java.io.IOException;
- import java.io.InputStream;
- import java.net.URISyntaxException;
- import java.net.URL;
- import java.net.URLConnection;
- import org.apache.hadoop.conf.Configuration;
- /**
- * Representation of a URL connection to open InputStreams.
- */
- class FsUrlConnection extends URLConnection {
- private Configuration conf;
- private InputStream is;
- FsUrlConnection(Configuration conf, URL url) {
- super(url);
- this.conf = conf;
- }
- @Override
- public void connect() throws IOException {
- try {
- FileSystem fs = FileSystem.get(url.toURI(), conf);
- is = fs.open(new Path(url.getPath()));
- } catch (URISyntaxException e) {
- throw new IOException(e.toString());
- }
- }
- /* @inheritDoc */
- @Override
- public InputStream getInputStream() throws IOException {
- if (is == null) {
- connect();
- }
- return is;
- }
- }