Package org.graffiti.util

Class GeneralUtils

java.lang.Object

org.graffiti.util.GeneralUtils

All Implemented Interfaces:

HelperClass

public class GeneralUtils
extends Object
implements HelperClass

Constructor Summary

Constructors

Constructor	Description
GeneralUtils()

Method Summary

Modifier and Type	Method	Description
boolean	existsEdge(Node n1, Node n2)	True iff any edge between n1 (source) and n2 (target) exists.
static Collection<Edge>	getEdges(Node n1, Node n2)	Returns a Collection of edges between n1 (source) and n2 (target).
static String	getNewLineString()	DOCUMENT ME!
static int[]	getPositionOfOnes(String s)	DOCUMENT ME!
static boolean	isPowerOf(int a, int base)	Returns true iff first parameter is a power of second, i.e.
static double	log(double a, double base)	Returns the logarithm of a with respect to base base.
static boolean	nan(double d)	DOCUMENT ME!
static int	numberOfOnes(String s)	Returns the number of "1"s within the string s.
static Attribute	searchForAttribute(Attribute attr, Class attributeType)	Returns the first attribute it finds that has the given class type.
static void	searchForAttributes(Attribute attr, Class attributeType, List attributesList)	Searches for all attributes that have the given class type.
static String	XMLify(String inStr)	DOCUMENT ME!

Methods inherited from class java.lang.Object

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

Constructor Details

GeneralUtils

public GeneralUtils()

Method Details

getEdges

public static final Collection<Edge> getEdges(Node n1,
Node n2)

Returns a Collection of edges between n1 (source) and n2 (target).

If no edge exists, returns an empty instance of Collection. n1==n2 allowed.

Parameters:

n1 -

n2 -

Returns:

Collection

getNewLineString

public static final String getNewLineString()

DOCUMENT ME!

Returns:

DOCUMENT ME!

getPositionOfOnes

public static final int[] getPositionOfOnes(String s)

DOCUMENT ME!

Parameters:

s - DOCUMENT ME!

Returns:

DOCUMENT ME!

isPowerOf

public static final boolean isPowerOf(int a,
int base)

Returns true iff first parameter is a power of second, i.e. returns true iff base^a is a natural number.

Parameters:

a - number to check

base -

Returns:

DOCUMENT ME!

XMLify

public static final String XMLify(String inStr)

DOCUMENT ME!

Parameters:

inStr - DOCUMENT ME!

Returns:

DOCUMENT ME!

existsEdge

public boolean existsEdge(Node n1,
Node n2)

True iff any edge between n1 (source) and n2 (target) exists.

n1==n2 allowed.

Parameters:

n1 -

n2 -

Returns:

boolean

log

public static final double log(double a,
double base)

Returns the logarithm of a with respect to base base.

Parameters:

a - DOCUMENT ME!

base - DOCUMENT ME!

Returns:

DOCUMENT ME!

nan

public static final boolean nan(double d)

DOCUMENT ME!

Parameters:

d - DOCUMENT ME!

Returns:

DOCUMENT ME!

numberOfOnes

public static final int numberOfOnes(String s)

Returns the number of "1"s within the string s.

Parameters:

s - DOCUMENT ME!

Returns:

DOCUMENT ME!

searchForAttribute

public static final Attribute searchForAttribute(Attribute attr,
Class attributeType)

Returns the first attribute it finds that has the given class type. Warning: this method delivers only one contained attribute of the given type. If there are more than one attibute of that type and you expect all that attributes you should better use either searchForAttributes(Attribute, Class, List).

Parameters:

attr - the root attribute for the search

attributeType - class to match

Returns:

first child (depth first) of attr that matches class type attributeType.

searchForAttributes

public static void searchForAttributes(Attribute attr,
Class attributeType,
List attributesList)

Searches for all attributes that have the given class type.

Parameters:

attr - the root attribute for the search

attributeType - class to match

attributesList - list which will be filled with found attributes.