com.novell.nds.dirxml.driver.xds.util
Class Java

java.lang.Object
  com.novell.nds.dirxml.driver.xds.util.Java

public abstract class Java

extends Object

A library of Java helper methods.

Field Summary

static Hashtable	EMPTY_HASH_TABLE An empty Hashtable.
static String	EMPTY_STRING Empty string.
static int	END_OF_STREAM The value returnd for end-of-stream.
static int	EQUAL The value returned for equal from compare() methods.
static int	INDEX_FIRST The first index in data structures.
static int	INDEX_NOT_FOUND The value returned for not found from find() methods.

Constructor Summary

Java()

Method Summary

static StringBuffer	clear(StringBuffer b) Clears the contents of a StringBuffer.
static Object	getFirst(List l) Returns the fist Object in a List.
static boolean	isJRE(int major, int minor) Is the Java Runtime Environment (JRE) >= the passed version information?
static boolean	isJRE(int major, int minor1, int minor2, int rev1, int rev2) Is the Java Runtime Environment (JRE) >= the passed version information?
static boolean	isNullOrEmpty(Collection c) Determies whether a Collection is null or empty?
static boolean	isNullOrEmpty(Map m) Determines whether a Map is null or empty?
static boolean	isNullOrZeroLength(byte[] bytes) Determines whether a byte[] is null or has a length of zero?

Methods inherited from class java.lang.Object

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

Field Detail

EQUAL

public static final int EQUAL

The value returned for equal from compare() methods.

See Also:

Constant Field Values

INDEX_FIRST

public static final int INDEX_FIRST

The first index in data structures.

See Also:

Constant Field Values

INDEX_NOT_FOUND

public static final int INDEX_NOT_FOUND

The value returned for not found from find() methods.

See Also:

Constant Field Values

END_OF_STREAM

public static final int END_OF_STREAM

The value returnd for end-of-stream.

See Also:

Constant Field Values

EMPTY_HASH_TABLE

public static final Hashtable EMPTY_HASH_TABLE

An empty Hashtable.

EMPTY_STRING

public static final String EMPTY_STRING

Empty string.

See Also:

Constant Field Values

Constructor Detail

Java

public Java()

Method Detail

isJRE

public static final boolean isJRE(int major,
                                  int minor)

Is the Java Runtime Environment (JRE) >= the passed version information?

Parameters:

major - the major version

minor - the minor version

Returns:

true or false

isJRE

public static final boolean isJRE(int major,
                                  int minor1,
                                  int minor2,
                                  int rev1,
                                  int rev2)

Is the Java Runtime Environment (JRE) >= the passed version information?

Parameters:

major - the major version (e.g., 1)

minor1 - the first minor version (e.g., 1.4)

minor2 - the second minor version (e.g., 1.4.2)

rev1 - the first revision number (e.g., 1.4.2_0)

rev2 - the second revision number (e.g., 1.4.2_08)

Returns:

true or false

getFirst

public static final Object getFirst(List l)

Returns the fist Object in a List.

Parameters:

l - the list; may be null

Returns:

may return null

isNullOrEmpty

public static final boolean isNullOrEmpty(Collection c)

Determies whether a Collection is null or empty?

Parameters:

c - the collection; may be null

Returns:

true if it is; false otherwise

isNullOrEmpty

public static final boolean isNullOrEmpty(Map m)

Determines whether a Map is null or empty?

Parameters:

m - the collection; may be null

Returns:

true if it is; false otherwise

isNullOrZeroLength

public static final boolean isNullOrZeroLength(byte[] bytes)

Determines whether a byte[] is null or has a length of zero?

Parameters:

bytes - the array; may be null

Returns:

true if it is; false otherwise

clear

public static final StringBuffer clear(StringBuffer b)

Clears the contents of a StringBuffer.

Parameters:

b - the b; may be null