code style: add maven plugin and code style

pom.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>cn.edu.tsinghua</groupId>
     <artifactId>tsfile</artifactId>
@@ -57,7 +58,7 @@
         <connection>scm:git:git://github.com/thulab/tsfile.git</connection>
         <developerConnection>scm:git:ssh://github.com:thulab/tsfile.git</developerConnection>
         <url>http://github.com/thulab/tsfile/tree/master</url>
-      <tag>v0.8.0</tag>
+        <tag>v0.8.0</tag>
     </scm>
 
     <distributionManagement>
@@ -136,6 +137,22 @@
 
     <build>
         <plugins>
+            <plugin>
+                <groupId>net.revelc.code.formatter</groupId>
+                <artifactId>formatter-maven-plugin</artifactId>
+                <version>2.7.5</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>format</goal>
+                        </goals>
+                        <configuration>
+                            <encoding>UTF-8</encoding>
+                            <configFile>${project.basedir}/code-style.xml</configFile>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>build-helper-maven-plugin</artifactId>

src/main/java/cn/edu/tsinghua/tsfile/common/conf/TSFileConfig.java

@@ -1,141 +1,140 @@
-package cn.edu.tsinghua.tsfile.common.conf;
-
-/**
- * TSFileConfig is a configure class. Every variables is public and has default
- * value.
- *
- * @author kangrong
- */
-public class TSFileConfig {
-    // Memory configuration
-    /**
-     * Memory size threshold for flushing to disk or HDFS, default value is 128MB
-     */
-    public int groupSizeInByte = 128 * 1024 * 1024;
-    /**
-     * The memory size for each series writer to pack page, default value is 64KB
-     */
-    public int pageSizeInByte = 64 * 1024;
-    /**
-     * The maximum number of data points in a page, defalut value is 1024 * 1024
-     */
-    public int maxNumberOfPointsInPage = 1024 * 1024;
-
-    // Data type configuration
-    /**
-     * Data type for input timestamp, TsFile supports INT32 or INT64
-     */
-    public String timeSeriesDataType = "INT64";
-    /**
-     * Max length limitation of input string
-     */
-    public int maxStringLength = 128;
-    /**
-     * Floating-point precision
-     */
-    public int floatPrecision = 2;
-
-    // Encoder configuration
-    /**
-     * Encoder of time series, TsFile supports TS_2DIFF, PLAIN and RLE(run-length encoding)
-     * Default value is TS_2DIFF
-     */
-    public String timeSeriesEncoder = "TS_2DIFF";
-    /**
-     * Encoder of value series. default value is PLAIN.
-     * For int, long data type, TsFile also supports TS_2DIFF and RLE(run-length encoding).
-     * For float, double data type, TsFile also supports TS_2DIFF, RLE(run-length encoding) and GORILLA.
-     * For text data type, TsFile only supports PLAIN.
-     */
-    public String valueEncoder = "PLAIN";
-
-    // RLE configuration
-    /**
-     * Default bit width of RLE encoding is 8
-     */
-    public int rleBitWidth = 8;
-    public final int RLE_MIN_REPEATED_NUM = 8;
-    public final int RLE_MAX_REPEATED_NUM = 0x7FFF;
-    public final int RLE_MAX_BIT_PACKED_NUM = 63;
-
-    // Gorilla encoding configuration
-    public final static int FLOAT_LENGTH = 32;
-    public final static int FLAOT_LEADING_ZERO_LENGTH = 5;
-    public final static int FLOAT_VALUE_LENGTH = 6;
-    public final static int DOUBLE_LENGTH = 64;
-    public final static int DOUBLE_LEADING_ZERO_LENGTH = 6;
-    public final static int DOUBLE_VALUE_LENGTH = 7;
-
-    // TS_2DIFF configuration
-    /**
-     * Default block size of two-diff. delta encoding is 128
-     */
-    public int deltaBlockSize = 128;
-
-    // Bitmap configuration
-    public final int BITMAP_BITWIDTH = 1;
-
-    // Freq encoder configuration
-    /**
-     * Default frequency type is SINGLE_FREQ
-     */
-    public String freqType = "SINGLE_FREQ";
-    /**
-     * Default PLA max error is 100
-     */
-    public double plaMaxError = 100;
-    /**
-     * Default SDT max error is 100
-     */
-    public double sdtMaxError = 100;
-    /**
-     * Default DFT satisfy rate is 0.1
-     */
-    public double dftSatisfyRate = 0.1;
-
-    // Compression configuration
-    /**
-     * Data compression method, TsFile supports UNCOMPRESSED or SNAPPY.
-     * Default value is UNCOMPRESSED which means no compression
-     */
-    public String compressor = "UNCOMPRESSED";
-
-    // Don't change the following configuration
-
-    /**
-     * Line count threshold for checking page memory occupied size
-     */
-    public int pageCheckSizeThreshold = 100;
-
-    /**
-     * Current version is 3
-     */
-    public static int currentVersion = 3;
-
-    /**
-     * Default endian value is LITTLE_ENDIAN
-     */
-    public String endian = "LITTLE_ENDIAN";
-
-    /**
-     * String encoder with UTF-8 encodes a character to at most 4 bytes.
-     */
-    public static final int BYTE_SIZE_PER_CHAR = 4;
-
-    public static final String STRING_ENCODING = "UTF-8";
-
-    public static final String CONFIG_FILE_NAME = "tsfile-format.properties";
-
-    /**
-     * The default grow size of class DynamicOneColumnData
-     */
-    public static int dynamicDataSize = 1000;
-
-    public static final String MAGIC_STRING = "TsFilev0.7.0";
-    /**
-     * only can be used by TsFileDescriptor
-     */
-    protected TSFileConfig() {
-
-    }
-}
+package cn.edu.tsinghua.tsfile.common.conf;
+
+/**
+ * TSFileConfig is a configure class. Every variables is public and has default value.
+ *
+ * @author kangrong
+ */
+public class TSFileConfig {
+  // Memory configuration
+  /**
+   * Memory size threshold for flushing to disk or HDFS, default value is 128MB
+   */
+  public int groupSizeInByte = 128 * 1024 * 1024;
+  /**
+   * The memory size for each series writer to pack page, default value is 64KB
+   */
+  public int pageSizeInByte = 64 * 1024;
+  /**
+   * The maximum number of data points in a page, defalut value is 1024 * 1024
+   */
+  public int maxNumberOfPointsInPage = 1024 * 1024;
+
+  // Data type configuration
+  /**
+   * Data type for input timestamp, TsFile supports INT32 or INT64
+   */
+  public String timeSeriesDataType = "INT64";
+  /**
+   * Max length limitation of input string
+   */
+  public int maxStringLength = 128;
+  /**
+   * Floating-point precision
+   */
+  public int floatPrecision = 2;
+
+  // Encoder configuration
+  /**
+   * Encoder of time series, TsFile supports TS_2DIFF, PLAIN and RLE(run-length encoding) Default
+   * value is TS_2DIFF
+   */
+  public String timeSeriesEncoder = "TS_2DIFF";
+  /**
+   * Encoder of value series. default value is PLAIN. For int, long data type, TsFile also supports
+   * TS_2DIFF and RLE(run-length encoding). For float, double data type, TsFile also supports
+   * TS_2DIFF, RLE(run-length encoding) and GORILLA. For text data type, TsFile only supports PLAIN.
+   */
+  public String valueEncoder = "PLAIN";
+
+  // RLE configuration
+  /**
+   * Default bit width of RLE encoding is 8
+   */
+  public int rleBitWidth = 8;
+  public final int RLE_MIN_REPEATED_NUM = 8;
+  public final int RLE_MAX_REPEATED_NUM = 0x7FFF;
+  public final int RLE_MAX_BIT_PACKED_NUM = 63;
+
+  // Gorilla encoding configuration
+  public final static int FLOAT_LENGTH = 32;
+  public final static int FLAOT_LEADING_ZERO_LENGTH = 5;
+  public final static int FLOAT_VALUE_LENGTH = 6;
+  public final static int DOUBLE_LENGTH = 64;
+  public final static int DOUBLE_LEADING_ZERO_LENGTH = 6;
+  public final static int DOUBLE_VALUE_LENGTH = 7;
+
+  // TS_2DIFF configuration
+  /**
+   * Default block size of two-diff. delta encoding is 128
+   */
+  public int deltaBlockSize = 128;
+
+  // Bitmap configuration
+  public final int BITMAP_BITWIDTH = 1;
+
+  // Freq encoder configuration
+  /**
+   * Default frequency type is SINGLE_FREQ
+   */
+  public String freqType = "SINGLE_FREQ";
+  /**
+   * Default PLA max error is 100
+   */
+  public double plaMaxError = 100;
+  /**
+   * Default SDT max error is 100
+   */
+  public double sdtMaxError = 100;
+  /**
+   * Default DFT satisfy rate is 0.1
+   */
+  public double dftSatisfyRate = 0.1;
+
+  // Compression configuration
+  /**
+   * Data compression method, TsFile supports UNCOMPRESSED or SNAPPY. Default value is UNCOMPRESSED
+   * which means no compression
+   */
+  public String compressor = "UNCOMPRESSED";
+
+  // Don't change the following configuration
+
+  /**
+   * Line count threshold for checking page memory occupied size
+   */
+  public int pageCheckSizeThreshold = 100;
+
+  /**
+   * Current version is 3
+   */
+  public static int currentVersion = 3;
+
+  /**
+   * Default endian value is LITTLE_ENDIAN
+   */
+  public String endian = "LITTLE_ENDIAN";
+
+  /**
+   * String encoder with UTF-8 encodes a character to at most 4 bytes.
+   */
+  public static final int BYTE_SIZE_PER_CHAR = 4;
+
+  public static final String STRING_ENCODING = "UTF-8";
+
+  public static final String CONFIG_FILE_NAME = "tsfile-format.properties";
+
+  /**
+   * The default grow size of class DynamicOneColumnData
+   */
+  public static int dynamicDataSize = 1000;
+
+  public static final String MAGIC_STRING = "TsFilev0.7.0";
+
+  /**
+   * only can be used by TsFileDescriptor
+   */
+  protected TSFileConfig() {
+
+  }
+}