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org.hsqldb.lib
Class ArrayUtil
java.lang.Objectorg.hsqldb.lib.ArrayUtil
- public class ArrayUtil
- extends java.lang.Object
Collection of static methods for operations on arrays
- Version:
- 1.7.0
| Constructor Summary | |
ArrayUtil()
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| Method Summary | |
static void |
copyAdjustArray(java.lang.Object[] source,
java.lang.Object[] dest,
java.lang.Object addition,
int colindex,
int adjust)
Copies elements of source to dest. |
static void |
copyArray(int[] source,
int[] dest,
int count)
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static void |
copyColumnValues(java.lang.Object[] row,
int[] colindex,
java.lang.Object[] colobject)
Copies some elements of row into colobject by using colindex as the list of indexes into row. |
static int[] |
getAdjustedColumnArray(int[] colarr,
int size,
int colindex,
int adjust)
Convenience wrapper for toAdjustedColumnArray() that creates the new array. |
static boolean |
haveCommonElement(int[] a,
int[] b,
int lenb)
Checks for any overlap between two arrays of column indexes. |
static boolean |
haveEqualArrays(int[] a,
int[] b,
int count)
Returns true if the first count elements of a and b are identical subarrays of integers |
static boolean |
haveEquality(int[] a,
int[] b,
int count,
boolean sets)
For sets == true returns true if a and b are the same length and contain the same set of integers. |
static boolean |
haveEqualSets(int[] a,
int[] b,
int count)
Returns true if the first count elements of a and b are identical sets of integers |
static void |
sortArray(int[] intarr)
Basic sort for small arrays. |
static int[] |
toAdjustedColumnArray(int[] colarr,
int colindex,
int adjust)
Returns new array with the elements in collar ajusted to reflect changes at colindex. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
ArrayUtil
public ArrayUtil()
| Method Detail |
sortArray
public static void sortArray(int[] intarr)
- Basic sort for small arrays.
haveEquality
public static boolean haveEquality(int[] a,
int[] b,
int count,
boolean sets)
- For sets == true returns true if a and b are the same length and
contain the same set of integers. For sets == false returns the result
of haveEqualArrays(a,b,count)
haveEqualSets
public static boolean haveEqualSets(int[] a,
int[] b,
int count)
- Returns true if the first count elements of a and b are identical sets
of integers
haveEqualArrays
public static boolean haveEqualArrays(int[] a,
int[] b,
int count)
- Returns true if the first count elements of a and b are identical
subarrays of integers
haveCommonElement
public static boolean haveCommonElement(int[] a,
int[] b,
int lenb)
- Checks for any overlap between two arrays of column indexes.
Limit check to lenb elements of b
copyArray
public static void copyArray(int[] source,
int[] dest,
int count)
copyAdjustArray
public static void copyAdjustArray(java.lang.Object[] source, java.lang.Object[] dest, java.lang.Object addition, int colindex, int adjust)
- Copies elements of source to dest. If adjust is -1 the element at
colindex is not copied. If adjust is +1 that element is filled with
the Object addition. All the rest of the elements in source are
shifted left or right accordingly when they are copied.
No checks are perfomed on array sizes and an exception is thrown
if they are not consistent with the other arguments.
toAdjustedColumnArray
public static int[] toAdjustedColumnArray(int[] colarr,
int colindex,
int adjust)
- Returns new array with the elements in collar ajusted to reflect
changes at colindex.
Each element in collarr represents an index into another array
otherarr.
colindex is the index at which an element is added or removed form
otherarr. Each element in the result array represents the new,
adjusted index to otherarr.
For each element of collarr that represents an index equal to
colindex and adjust is -1, the result will not contain that element
and will be shorter than collar by one element.
getAdjustedColumnArray
public static int[] getAdjustedColumnArray(int[] colarr,
int size,
int colindex,
int adjust)
- Convenience wrapper for toAdjustedColumnArray() that creates the new
array.
copyColumnValues
public static void copyColumnValues(java.lang.Object[] row, int[] colindex, java.lang.Object[] colobject)
- Copies some elements of row into colobject by using colindex as the
list of indexes into row. colindex and colobject are of equal length
and normally shorter than row;
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