apache / carbondata / 833

Build # 833

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<a href="https://github.com/apache/carbondata/commit/<a class=hub.com/apache/carbondata/commit/789ce69266a0f552d09a143fc41c397ce498c236">789ce6926<a href="https://github.com/apache/carbondata/commit/789ce69266a0f552d09a143fc41c397ce498c236">">Merge </a><a class="double-link" href="https://github.com/apache/carbondata/commit/<a class="double-link" href="https://github.com/apache/carbondata/commit/59eded7ecdc1d0e0536dbd0e1f77373c9866bf83">59eded7ec</a>">59eded7ec</a><a href="https://github.com/apache/carbondata/commit/789ce69266a0f552d09a143fc41c397ce498c236"> into c01636163">c01636163</a>

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95.83

/core/src/main/java/org/apache/carbondata/core/reader/ThriftReader.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 org.apache.carbondata.core.reader;

import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;

import org.apache.carbondata.core.datastore.impl.FileFactory;
import org.apache.carbondata.core.util.CarbonUtil;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.thrift.TBase;
import org.apache.thrift.TException;
import org.apache.thrift.protocol.TCompactProtocol;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TIOStreamTransport;

/**
 * A simple class for reading Thrift objects (of a single type) from a fileName.
 */
public class ThriftReader {
  /**
   * File containing the objects.
   */
  private String fileName;
  /**
   * Used to create empty objects that will be initialized with values from the fileName.
   */
  private TBaseCreator creator;
  /**
   * For reading the fileName.
   */
  private DataInputStream dataInputStream;
  /**
   * For reading the binary thrift objects.
   */
  private TProtocol binaryIn;

  private Configuration configuration;

  /**
   * Constructor.
   */
  public ThriftReader(String fileName, TBaseCreator creator) {
    this.fileName = fileName;
    this.creator = creator;
  }

  public ThriftReader(String fileName, TBaseCreator creator, Configuration configuration) {
    this.fileName = fileName;
    this.configuration = configuration;
    this.creator = creator;
  }

  /**
   * Constructor.
   */
  public ThriftReader(String fileName) {
    this.fileName = fileName;
  }

  /**
   * Constructor.
   */
  public ThriftReader(String fileName, Configuration configuration) {
    this.fileName = fileName;
    this.configuration = configuration;
  }

  /**
   * Constructor.
   */
  public ThriftReader(byte[] fileData) {
    dataInputStream = new DataInputStream(new ByteArrayInputStream(fileData));
    binaryIn = new TCompactProtocol(new TIOStreamTransport(dataInputStream));
  }

  /**
   * Opens the fileName for reading.
   */
  public void open() throws IOException {
    Configuration conf = configuration != null ? configuration : FileFactory.getConfiguration();
    FileFactory.FileType fileType = FileFactory.getFileType(fileName);
    dataInputStream = FileFactory.getDataInputStream(fileName, fileType, conf);
    binaryIn = new TCompactProtocol(new TIOStreamTransport(dataInputStream));
  }

  /**
   * This method will set the position of stream from where data has to be read
   */
  public void setReadOffset(long bytesToSkip) throws IOException {
    if (dataInputStream instanceof FSDataInputStream) {
      ((FSDataInputStream)dataInputStream).seek(bytesToSkip);
    } else if (dataInputStream.skip(bytesToSkip) != bytesToSkip) {
      throw new IOException("It doesn't set the offset properly");
    }
  }

  /**
   * Checks if another objects is available by attempting to read another byte from the stream.
   */
  public boolean hasNext() throws IOException {
    dataInputStream.mark(1);
    int val = dataInputStream.read();
    dataInputStream.reset();
    return val != -1;
  }

  /**
   * Reads the next object from the fileName.
   */
  public TBase read() throws IOException {
    TBase t = creator.create();
    try {
      t.read(binaryIn);
    } catch (TException e) {
      throw new IOException(e);
    }
    return t;
  }

  /**
   * Reads the next object from the fileName.
   *
   * @param creator type of object which will be returned
   * @throws IOException any problem while reading
   */
  public TBase read(TBaseCreator creator) throws IOException {
    TBase t = creator.create();
    try {
      t.read(binaryIn);
    } catch (TException e) {
      throw new IOException(e);
    }
    return t;
  }

  /**
   * Close the fileName.
   */
  public void close() {
    CarbonUtil.closeStreams(dataInputStream);
  }

  /**
   * Thrift deserializes by taking an existing object and populating it. ThriftReader
   * needs a way of obtaining instances of the class to be populated and this interface
   * defines the mechanism by which a client provides these instances.
   */
  public interface TBaseCreator {
    TBase create();
  }
}

1	/*
2	* Licensed to the Apache Software Foundation (ASF) under one or more
3	* contributor license agreements. See the NOTICE file distributed with
4	* this work for additional information regarding copyright ownership.
5	* The ASF licenses this file to You under the Apache License, Version 2.0
6	* (the "License"); you may not use this file except in compliance with
7	* the License. You may obtain a copy of the License at
8	*
9	* http://www.apache.org/licenses/LICENSE-2.0
10	*
11	* Unless required by applicable law or agreed to in writing, software
12	* distributed under the License is distributed on an "AS IS" BASIS,
13	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14	* See the License for the specific language governing permissions and
15	* limitations under the License.
16	*/
17
18	package org.apache.carbondata.core.reader;
19
20	import java.io.ByteArrayInputStream;
21	import java.io.DataInputStream;
22	import java.io.IOException;
23
24	import org.apache.carbondata.core.datastore.impl.FileFactory;
25	import org.apache.carbondata.core.util.CarbonUtil;
26
27	import org.apache.hadoop.conf.Configuration;
28	import org.apache.hadoop.fs.FSDataInputStream;
29	import org.apache.thrift.TBase;
30	import org.apache.thrift.TException;
31	import org.apache.thrift.protocol.TCompactProtocol;
32	import org.apache.thrift.protocol.TProtocol;
33	import org.apache.thrift.transport.TIOStreamTransport;
34
35	/**
36	* A simple class for reading Thrift objects (of a single type) from a fileName.
37	*/
38	public class ThriftReader {
39	/**
40	* File containing the objects.
41	*/
42	private String fileName;
43	/**
44	* Used to create empty objects that will be initialized with values from the fileName.
45	*/
46	private TBaseCreator creator;
47	/**
48	* For reading the fileName.
49	*/
50	private DataInputStream dataInputStream;
51	/**
52	* For reading the binary thrift objects.
53	*/
54	private TProtocol binaryIn;
55
56	private Configuration configuration;
57
58	/**
59	* Constructor.
60	*/
61	public ThriftReader(String fileName, TBaseCreator creator) {	2✔
62	this.fileName = fileName;	2✔
63	this.creator = creator;	2✔
64	}	2✔
65
66	public ThriftReader(String fileName, TBaseCreator creator, Configuration configuration) {	1✔
67	this.fileName = fileName;	1✔
68	this.configuration = configuration;	1✔
69	this.creator = creator;	1✔
70	}	1✔
71
72	/**
73	* Constructor.
74	*/
75	public ThriftReader(String fileName) {	2✔
76	this.fileName = fileName;	2✔
77	}	2✔
78
79	/**
80	* Constructor.
81	*/
82	public ThriftReader(String fileName, Configuration configuration) {	2✔
83	this.fileName = fileName;	2✔
84	this.configuration = configuration;	2✔
85	}	2✔
86
87	/**
88	* Constructor.
89	*/
90	public ThriftReader(byte[] fileData) {	1✔
91	dataInputStream = new DataInputStream(new ByteArrayInputStream(fileData));	1✔
92	binaryIn = new TCompactProtocol(new TIOStreamTransport(dataInputStream));	1✔
93	}	1✔
94
95	/**
96	* Opens the fileName for reading.
97	*/
98	public void open() throws IOException {
99	Configuration conf = configuration != null ? configuration : FileFactory.getConfiguration();	2✔
100	FileFactory.FileType fileType = FileFactory.getFileType(fileName);	2✔
101	dataInputStream = FileFactory.getDataInputStream(fileName, fileType, conf);	2✔
102	binaryIn = new TCompactProtocol(new TIOStreamTransport(dataInputStream));	2✔
103	}	2✔
104
105	/**
106	* This method will set the position of stream from where data has to be read
107	*/
108	public void setReadOffset(long bytesToSkip) throws IOException {
109	if (dataInputStream instanceof FSDataInputStream) {	2✔
110	((FSDataInputStream)dataInputStream).seek(bytesToSkip);	×
111	} else if (dataInputStream.skip(bytesToSkip) != bytesToSkip) {	2✔
112	throw new IOException("It doesn't set the offset properly");	×
113	}
114	}	2✔
115
116	/**
117	* Checks if another objects is available by attempting to read another byte from the stream.
118	*/
119	public boolean hasNext() throws IOException {
120	dataInputStream.mark(1);	2✔
121	int val = dataInputStream.read();	2✔
122	dataInputStream.reset();	2✔
123	return val != -1;	2✔
124	}
125
126	/**
127	* Reads the next object from the fileName.
128	*/
129	public TBase read() throws IOException {
130	TBase t = creator.create();	2✔
131	try {
132	t.read(binaryIn);	2✔
133	} catch (TException e) {	2✔
134	throw new IOException(e);	2✔
135	}	2✔
136	return t;	2✔
137	}
138
139	/**
140	* Reads the next object from the fileName.
141	*
142	* @param creator type of object which will be returned
143	* @throws IOException any problem while reading
144	*/
145	public TBase read(TBaseCreator creator) throws IOException {
146	TBase t = creator.create();	2✔
147	try {
148	t.read(binaryIn);	2✔
149	} catch (TException e) {	2✔
150	throw new IOException(e);	2✔
151	}	2✔
152	return t;	2✔
153	}
154
155	/**
156	* Close the fileName.
157	*/
158	public void close() {
159	CarbonUtil.closeStreams(dataInputStream);	2✔
160	}	2✔
161
162	/**
163	* Thrift deserializes by taking an existing object and populating it. ThriftReader
164	* needs a way of obtaining instances of the class to be populated and this interface
165	* defines the mechanism by which a client provides these instances.
166	*/
167	public interface TBaseCreator {
168	TBase create();
169	}
170	}

apache / carbondata / 833

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