Package com.logviewer.utils

Class Utils

java.lang.Object

com.logviewer.utils.Utils

public class Utils
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final byte[]	EMPTY_BYTE_ARRAY
static final ByteBuffer	EMPTY_BYTE_BUFFER
static final int[]	EMPTY_INT_ARRAY
static final Object[]	EMPTY_OBJECTS
static final String	LOCAL_HOST_NAME
static final long	MAX_TIME_MILLIS

Method Summary

Modifier and Type	Method	Description
static void	assertValidTimestamp(long nano)
static void	closeQuietly(AutoCloseable closeable)
static int	compareFileNames(String f1, String f2)
static boolean	containsIgnoreCase(String str, String searchStr)
static Pair<String,Integer>	decode(byte[] data, Charset encoding)	Decodes text from a byte array.
static void	deleteContent(Path path)
static Long	getFormatHash(LogFormat format)
static String	getStackTraceAsString(Throwable throwable)
static Path	getTempDir()
static <T> int	indexOf(List<? extends T> list, Predicate<T> predicate)
static boolean	isIdentifier(String s)
static boolean	isSubdirectory(String directory, String child)
static <K, V> Map<K,V>	newMap(Object... keysAndValues)
static String	normalizePath(String path)
static RuntimeException	propagate(Throwable t)
static void	putInt(MessageDigest digest, int x)
static void	putUnencodedChars(MessageDigest digest, char c)
static void	putUnencodedChars(MessageDigest digest, String s)
static void	readFully(ReadableByteChannel channel, ByteBuffer buf)
static void	readFully(ReadableByteChannel channel, ByteBuffer buf, int length)
static String	removeAsciiColorCodes(String s)
static <T> T	safeGet(Future<T> future)
static void	setLimitSafely(ByteBuffer byteBuffer, int newLimit)	We cannot call ByteBuffer.limit(int) directly because it doesn't work with Java 8.
static void	setPositionSafely(ByteBuffer byteBuffer, int newPosition)	We cannot call ByteBuffer.position(int) directly because it doesn't work with Java 8.
static String	title(String logPath)
static String	toString(ByteBuffer buffer)
static String	toString(ByteBuffer buffer, Charset charsets)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

MAX_TIME_MILLIS

public static final long MAX_TIME_MILLIS

See Also:

• Constant Field Values

EMPTY_BYTE_ARRAY

public static final byte[] EMPTY_BYTE_ARRAY

EMPTY_INT_ARRAY

public static final int[] EMPTY_INT_ARRAY

EMPTY_BYTE_BUFFER

public static final ByteBuffer EMPTY_BYTE_BUFFER

EMPTY_OBJECTS

public static final Object[] EMPTY_OBJECTS

LOCAL_HOST_NAME

public static final String LOCAL_HOST_NAME

Method Details

closeQuietly

public static void closeQuietly(@Nullable
 AutoCloseable closeable)

deleteContent

public static void deleteContent(Path path)
                          throws IOException

Throws:

IOException

title

public static String title(@Nullable
 String logPath)

readFully

public static void readFully(ReadableByteChannel channel,
 ByteBuffer buf,
 int length)
                      throws IOException

Throws:

IOException

readFully

public static void readFully(ReadableByteChannel channel,
 ByteBuffer buf)
                      throws IOException

Throws:

IOException

isIdentifier

public static boolean isIdentifier(String s)

toString

public static String toString(ByteBuffer buffer)

toString

public static String toString(ByteBuffer buffer,
 Charset charsets)

isSubdirectory

public static boolean isSubdirectory(String directory,
 String child)

compareFileNames

public static int compareFileNames(@NonNull
 String f1,
 @NonNull
 String f2)

containsIgnoreCase

public static boolean containsIgnoreCase(String str,
 String searchStr)

indexOf

public static <T> int indexOf(List<? extends T> list,
 Predicate<T> predicate)

getFormatHash

public static Long getFormatHash(LogFormat format)

safeGet

public static <T> T safeGet(Future<T> future)

normalizePath

public static String normalizePath(String path)

propagate

public static RuntimeException propagate(@NonNull
 Throwable t)

putUnencodedChars

public static void putUnencodedChars(MessageDigest digest,
 String s)

putUnencodedChars

public static void putUnencodedChars(MessageDigest digest,
 char c)

putInt

public static void putInt(MessageDigest digest,
 int x)

newMap

public static <K,
V> Map<K,V> newMap(Object... keysAndValues)

getStackTraceAsString

@NonNull
public static String getStackTraceAsString(@NonNull
 Throwable throwable)

assertValidTimestamp

public static void assertValidTimestamp(long nano)

getTempDir

@NonNull
public static Path getTempDir()
                       throws IOException

Throws:

IOException

removeAsciiColorCodes

public static String removeAsciiColorCodes(String s)

decode

public static Pair<String,Integer> decode(byte[] data,
 Charset encoding)

Decodes text from a byte array. The end of the data may be broken UTF8 sequence, skip it.

Parameters:

data - The bytes to decode

encoding - The encoding

Returns:

A pair of the decoded text and the actual size of the text in bytes.

setPositionSafely

public static void setPositionSafely(ByteBuffer byteBuffer,
 int newPosition)

We cannot call ByteBuffer.position(int) directly because it doesn't work with Java 8. In the Java 8 the return type is ByteBuffer, but in Java 11 the return type is Buffer. This method calls `position(int)` on Buffer class. It works with both Java 8 and Java 11.

setLimitSafely

public static void setLimitSafely(ByteBuffer byteBuffer,
 int newLimit)

We cannot call ByteBuffer.limit(int) directly because it doesn't work with Java 8. In the Java 8 the return type is ByteBuffer, but in Java 11 the return type is Buffer. This method calls `position(int)` on Buffer class. It works with both Java 8 and Java 11.