Package org.eclipse.jetty.util

Class TypeUtil

java.lang.Object

org.eclipse.jetty.util.TypeUtil

public class TypeUtil
extends Object

TYPE Utilities. Provides various static utility methods for manipulating types and their string representations.

Since:

Jetty 4.1

Field Summary

Fields

Modifier and Type	Field	Description
static int	CR
static int	LF
static Class<?>[]	NO_ARGS

Constructor Summary

Constructors

Constructor	Description
TypeUtil()

Method Summary

Modifier and Type	Method	Description
static <T> List<T>	asList(T[] a)	Array to List.
static Object	call(Class<?> oClass, String methodName, Object obj, Object[] arg)
static Object	construct(Class<?> klass, Object[] arguments)
static Object	construct(Class<?> klass, Object[] arguments, Map<String,Object> namedArgMap)
static byte	convertHexDigit(byte c)
static int	convertHexDigit(char c)
static int	convertHexDigit(int c)
static void	dump(Class<?> c)
static void	dump(ClassLoader cl)
static byte[]	fromHexString(String s)
static Class<?>	fromName(String name)	Class from a canonical name for a type.
static URI	getLocationOfClass(Class<?> clazz)
static boolean	isFalse(Object o)
static boolean	isTrue(Object o)
static byte[]	parseBytes(String s, int base)
static int	parseInt(byte[] b, int offset, int length, int base)	Parse an int from a byte array of ascii characters.
static int	parseInt(String s, int offset, int length, int base)	Parse an int from a substring.
static void	toHex(byte b, Appendable buf)
static void	toHex(int value, Appendable buf)
static void	toHex(long value, Appendable buf)
static String	toHexString(byte b)
static String	toHexString(byte[] b)
static String	toHexString(byte[] b, int offset, int length)
static String	toName(Class<?> type)	Canonical name for a type.
static String	toString(byte[] bytes, int base)
static Object	valueOf(Class<?> type, String value)	Convert String value to instance.
static Object	valueOf(String type, String value)	Convert String value to instance.

Methods inherited from class java.lang.Object

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

Field Detail

NO_ARGS

public static final Class<?>[] NO_ARGS

CR

public static final int CR

See Also:

Constant Field Values

LF

public static final int LF

See Also:

Constant Field Values

Constructor Detail

TypeUtil

public TypeUtil()

Method Detail

asList

public static <T> List<T> asList(T[] a)

Array to List.

Works like Arrays.asList(Object...), but handles null arrays.

Type Parameters:

T - the array and list entry type

Parameters:

a - the array to convert to a list

Returns:

a list backed by the array.

fromName

public static Class<?> fromName(String name)

Class from a canonical name for a type.

Parameters:

name - A class or type name.

Returns:

A class , which may be a primitive TYPE field..

toName

public static String toName(Class<?> type)

Canonical name for a type.

Parameters:

type - A class , which may be a primitive TYPE field.

Returns:

Canonical name.

valueOf

public static Object valueOf(Class<?> type,
                             String value)

Convert String value to instance.

Parameters:

type - The class of the instance, which may be a primitive TYPE field.

value - The value as a string.

Returns:

The value as an Object.

valueOf

public static Object valueOf(String type,
                             String value)

Convert String value to instance.

Parameters:

type - classname or type (eg int)

value - The value as a string.

Returns:

The value as an Object.

parseInt

public static int parseInt(String s,
                           int offset,
                           int length,
                           int base)
                    throws NumberFormatException

Parse an int from a substring. Negative numbers are not handled.

Parameters:

s - String

offset - Offset within string

length - Length of integer or -1 for remainder of string

base - base of the integer

Returns:

the parsed integer

Throws:

NumberFormatException - if the string cannot be parsed

parseInt

public static int parseInt(byte[] b,
                           int offset,
                           int length,
                           int base)
                    throws NumberFormatException

Parse an int from a byte array of ascii characters. Negative numbers are not handled.

Parameters:

b - byte array

offset - Offset within string

length - Length of integer or -1 for remainder of string

base - base of the integer

Returns:

the parsed integer

Throws:

NumberFormatException - if the array cannot be parsed into an integer

parseBytes

public static byte[] parseBytes(String s,
                                int base)

toString

public static String toString(byte[] bytes,
                              int base)

convertHexDigit

public static byte convertHexDigit(byte c)

Parameters:

c - An ASCII encoded character 0-9 a-f A-F

Returns:

The byte value of the character 0-16.

convertHexDigit

public static int convertHexDigit(char c)

Parameters:

c - An ASCII encoded character 0-9 a-f A-F

Returns:

The byte value of the character 0-16.

convertHexDigit

public static int convertHexDigit(int c)

Parameters:

c - An ASCII encoded character 0-9 a-f A-F

Returns:

The byte value of the character 0-16.

toHex

public static void toHex(byte b,
                         Appendable buf)

toHex

public static void toHex(int value,
                         Appendable buf)
                  throws IOException

Throws:

IOException

toHex

public static void toHex(long value,
                         Appendable buf)
                  throws IOException

Throws:

IOException

toHexString

public static String toHexString(byte b)

toHexString

public static String toHexString(byte[] b)

toHexString

public static String toHexString(byte[] b,
                                 int offset,
                                 int length)

fromHexString

public static byte[] fromHexString(String s)

dump

public static void dump(Class<?> c)

dump

public static void dump(ClassLoader cl)

call

public static Object call(Class<?> oClass,
                          String methodName,
                          Object obj,
                          Object[] arg)
                   throws InvocationTargetException,
                          NoSuchMethodException

Throws:

InvocationTargetException

NoSuchMethodException

construct

public static Object construct(Class<?> klass,
                               Object[] arguments)
                        throws InvocationTargetException,
                               NoSuchMethodException

Throws:

InvocationTargetException

NoSuchMethodException

construct

public static Object construct(Class<?> klass,
                               Object[] arguments,
                               Map<String,Object> namedArgMap)
                        throws InvocationTargetException,
                               NoSuchMethodException

Throws:

InvocationTargetException

NoSuchMethodException

isTrue

public static boolean isTrue(Object o)

Parameters:

o - Object to test for true

Returns:

True if passed object is not null and is either a Boolean with value true or evaluates to a string that evaluates to true.

isFalse

public static boolean isFalse(Object o)

Parameters:

o - Object to test for false

Returns:

True if passed object is not null and is either a Boolean with value false or evaluates to a string that evaluates to false.

getLocationOfClass

public static URI getLocationOfClass(Class<?> clazz)