com.jaxfront.core.util
Class VectorHelper

java.lang.Object
  com.jaxfront.core.util.VectorHelper

public class VectorHelper
extends java.lang.Object

Constructor Summary

VectorHelper()

Method Summary

static java.util.List	compareDifference(java.util.Collection vectA, java.util.Collection vectB)
static java.util.List	compareSequence(java.util.List vectA, java.util.List vectB)
static java.util.List	copy(java.util.List toClone)
static java.util.List	difference(java.util.Collection vectA, java.util.Collection vectB) This method returns a Collection containing the set of objects contained in vectA that are not contained in vectB.
static java.util.Vector	difference(java.util.Vector vectA, java.util.Vector vectB) This method returns a Vector containing the set of objects contained in vectA that are not contained in vectB.
static java.util.Vector	duplicates(java.util.Vector vector) This method returns a Vector of items that appeared in the vector parameter more than once.
static java.util.List	getContains(java.util.List array, java.lang.String sword)
static java.util.List	getEndsWith(java.util.List array, java.lang.String sword)
static java.lang.Object	getFirstCommonObject(java.util.Vector vectA, java.util.Vector vectB)
static java.util.List	getStartsWith(java.util.List array, java.lang.String sword)
static java.util.Vector	intersection(java.util.Vector vectA, java.util.Vector vectB) This method returns a Vector containing the intersection of the objects contained in vectA and vectB.
static boolean	isSame(java.util.List listA, java.util.List listB)
static java.util.List	keepEvery(java.util.List array, int every)
static void	main(java.lang.String[] args)
static java.util.Vector	minus(java.util.Vector vectA, java.util.Vector vectB) This method returns a Vector containing the elements of vectA minus the elements of vectB.
static boolean	overlaps(java.util.Vector vectA, java.util.Vector vectB) Returns true if vectA and vectB have any elements in common.
static java.util.List	removeDuplicates(java.util.List vector)
static java.util.List	removeDuplicatesLastWins(java.util.List aList)
static java.util.List	removeEvery(java.util.List array, int every)
static java.util.List	removeLast(java.util.List aList, int count)
static java.util.Vector	sameSequence(java.util.List a, java.util.List b)
static java.util.Vector	sameSequence(java.util.Vector a, java.util.Vector b)
static java.util.Vector	stringVector(java.lang.String input, java.lang.String sepChars) This method takes a sepChars-separated string and converts it to a vector of fields. i.e., "gomod,jonabbey" -> a vector whose elements are "gomod" and "jonabbey".
static java.lang.String[]	toStringArray(java.util.List vals)
static java.util.Vector	union(java.util.Vector vectA, java.util.Vector vectB) This method returns a Vector containing the union of the objects contained in vectA and vectB.
static void	unionAdd(java.util.Vector vect, java.lang.Object obj) This method adds obj to vect if and only if vect does not already contain obj.
static java.lang.String	vectorString(java.util.Vector vec) This method returns a string containing all the elements in vec concatenated together, comma separated.
static java.lang.String	vectorString(java.util.Vector vec, java.lang.String method) This method returns a string containing all the elements in vec concatenated together, comma separated.

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorHelper

public VectorHelper()

Method Detail

compareDifference

public static java.util.List compareDifference(java.util.Collection vectA,
                                               java.util.Collection vectB)

compareSequence

public static java.util.List compareSequence(java.util.List vectA,
                                             java.util.List vectB)

copy

public static java.util.List copy(java.util.List toClone)

difference

public static java.util.List difference(java.util.Collection vectA,
                                        java.util.Collection vectB)

This method returns a Collection containing the set of objects contained in vectA that are not contained in vectB. This method will always return a new, non-null List , even if vectA and/or vectB are null.

difference

public static java.util.Vector difference(java.util.Vector vectA,
                                          java.util.Vector vectB)

This method returns a Vector containing the set of objects contained in vectA that are not contained in vectB. This method will always return a new, non-null Vector, even if vectA and/or vectB are null.

duplicates

public static java.util.Vector duplicates(java.util.Vector vector)

This method returns a Vector of items that appeared in the vector parameter more than once. If no duplicates are found or if vector is null, this method returns null.

getContains

public static java.util.List getContains(java.util.List array,
                                         java.lang.String sword)

getEndsWith

public static java.util.List getEndsWith(java.util.List array,
                                         java.lang.String sword)

getFirstCommonObject

public static java.lang.Object getFirstCommonObject(java.util.Vector vectA,
                                                    java.util.Vector vectB)

getStartsWith

public static java.util.List getStartsWith(java.util.List array,
                                           java.lang.String sword)

intersection

public static java.util.Vector intersection(java.util.Vector vectA,
                                            java.util.Vector vectB)

This method returns a Vector containing the intersection of the objects contained in vectA and vectB. This method will always return a new, non-null Vector, even if vectA and/or vectB are null.

isSame

public static boolean isSame(java.util.List listA,
                             java.util.List listB)

keepEvery

public static java.util.List keepEvery(java.util.List array,
                                       int every)

main

public static void main(java.lang.String[] args)

minus

public static java.util.Vector minus(java.util.Vector vectA,
                                     java.util.Vector vectB)

This method returns a Vector containing the elements of vectA minus the elements of vectB. If vectA has an element in the Vector 5 times and vectB has it 3 times, the result will have it two times. This method will always return a new, non-null Vector, even if vectA and/or vectB are null.

overlaps

public static boolean overlaps(java.util.Vector vectA,
                               java.util.Vector vectB)

Returns true if vectA and vectB have any elements in common.

removeDuplicates

public static java.util.List removeDuplicates(java.util.List vector)

removeDuplicatesLastWins

public static java.util.List removeDuplicatesLastWins(java.util.List aList)

removeEvery

public static java.util.List removeEvery(java.util.List array,
                                         int every)

removeLast

public static java.util.List removeLast(java.util.List aList,
                                        int count)

sameSequence

public static java.util.Vector sameSequence(java.util.List a,
                                            java.util.List b)

sameSequence

public static java.util.Vector sameSequence(java.util.Vector a,
                                            java.util.Vector b)

stringVector

public static java.util.Vector stringVector(java.lang.String input,
                                            java.lang.String sepChars)

This method takes a sepChars-separated string and converts it to a vector of fields. i.e., "gomod,jonabbey" -> a vector whose elements are "gomod" and "jonabbey". NOTE: this method will omit 'degenerate' fields from the output vector. That is, if input is "gomod,,, jonabbey" and sepChars is ", ", then the result vector will still only have "gomod" and "jonabbey" as elements, even though one might wish to explicitly know about the blanks between commas. This method is intended mostly for creating email list vectors, rather than general file-parsing vectors.

Parameters:

input - the sepChars-separated string to test.

sepChars - a string containing a list of characters which may occur as field separators. Any two fields in the input may be separated by one or many of the characters present in sepChars.

toStringArray

public static java.lang.String[] toStringArray(java.util.List vals)

union

public static java.util.Vector union(java.util.Vector vectA,
                                     java.util.Vector vectB)

This method returns a Vector containing the union of the objects contained in vectA and vectB. The resulting Vector will not contain any duplicates, even if vectA or vectB themselves contain repeated items. This method will always return a new, non-null Vector, even if vectA and/or vectB are null.

unionAdd

public static void unionAdd(java.util.Vector vect,
                            java.lang.Object obj)

This method adds obj to vect if and only if vect does not already contain obj.

vectorString

public static java.lang.String vectorString(java.util.Vector vec)

This method returns a string containing all the elements in vec concatenated together, comma separated.

vectorString

public static java.lang.String vectorString(java.util.Vector vec,
                                            java.lang.String method)

This method returns a string containing all the elements in vec concatenated together, comma separated.