litesoft
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package org.litesoft.core.typeutils; import org.litesoft.core.util.*; public class Integers { public static final int[] EMPTY_ARRAY_PRIMITIVES = new int[0]; public static final Integer[] EMPTY_ARRAY = new Integer[0]; public static int assertPositive( String pWhat, int pInt ) { if ( 0 < pInt ) { return pInt; } throw new IllegalArgumentException( pWhat + " expected to be positive, but was: " + pInt ); } public static int assertNonNegative( String pWhat, int pInt ) { if ( 0 <= pInt ) { return pInt; } throw new IllegalArgumentException( pWhat + " expected to be non-negative, but was: " + pInt ); } public static void assertNotEqual( String pObjectName, int pNotExpected, int pActual ) throws IllegalArgumentException { if ( pNotExpected == pActual ) { throw new IllegalArgumentException( pObjectName + ": '" + pNotExpected + "' Not allowed" ); } } public static void assertEqual( String pObjectName, int pExpected, int pActual ) throws IllegalArgumentException { if ( pExpected != pActual ) { throw new IllegalArgumentException( pObjectName + ": Expected '" + pExpected + "', but was '" + pActual + "'" ); } } public static String zeroPadIt( int pMinDesiredLength, int pIt ) { String rv = String.valueOf( pIt ); while ( rv.length() < pMinDesiredLength ) { rv = "0" + rv; } return rv; } public static String padIt( int pMinDesiredLength, int pIt ) { return Strings.padIt( pMinDesiredLength, "" + pIt ); } public static String iTpad( int pIt, int pMinDesiredLength ) { return Strings.iTpad( "" + pIt, pMinDesiredLength ); } public static boolean isNullOrEmpty( int[] pArrayToCheck ) { return (pArrayToCheck == null || pArrayToCheck.length == 0); } public static boolean areArraysEqual( int[] pThis, int[] pThat ) { if ( pThis == pThat ) // handles if both are null { return true; } if ( (pThis != null) && (pThat != null) && (pThis.length == pThat.length) ) { for ( int i = pThis.length; --i >= 0; ) { if ( pThis[i] != pThat[i] ) { return false; } } return true; } return false; } public static boolean checkIndex( int pIndex, int pMax, boolean pInclusive ) { return ((0 <= pIndex) && (pIndex < pMax)) || (pInclusive && (pIndex == pMax)); } public static void validateIndex( int pIndex, int pMax, boolean pInclusive ) throws IllegalArgumentException { if ( !checkIndex( pIndex, pMax, pInclusive ) ) { throw new IllegalArgumentException( "!( 0 <= " + pIndex + " " + (pInclusive ? "<=" : "<") + " " + pMax + " )" ); } } /** * return pIndex constained between 0 (inclusive) and pMax (pInclusive). If the effective 'max' is less than 0, then 0 will be returned. */ public static int constrainIndex( int pIndex, int pMax, boolean pInclusive ) { if ( (pMax <= pIndex) || (pInclusive && (pIndex == pMax)) ) { pIndex = pInclusive ? pMax : pMax - 1; } return (pIndex < 0) ? 0 : pIndex; } public static String getMax2PlacePercentage( int pPortions ) { if ( pPortions == 0 ) { return null; } int portion = 10000 / pPortions; String s = "" + portion; while ( s.length() < 3 ) { s = "0" + s; } int wholeLen = s.length() - 2; s = s.substring( 0, wholeLen ) + "." + s.substring( wholeLen ); while ( s.charAt( s.length() - 1 ) == '0' ) { s = s.substring( 0, s.length() - 1 ); } if ( s.charAt( s.length() - 1 ) == '.' ) { s = s.substring( 0, s.length() - 1 ); } return s + "%"; } public static boolean areNonArraysEqual( int pThis, int pThat ) { return (pThis == pThat); } /** * Returns a String that represents <i>pThis</i> with english code tail, * such as "3rd".<p> * <p/> * If <i>pThis</i> is non-negative, then append on the appropriate two * letter <i>english</i> code:<p> * <pre> * st,nd,rd,th * </pre><p> * * @param pThis the int to convert.<p> * * @return the String representation for <i>pThis</i> and if not negative, * then appended with the appropriate two letter <i>english</i> * junk.<p> */ public static String toNth( int pThis ) { String rv = Integer.toString( pThis ); if ( pThis < 0 ) { return rv; } if ( (pThis < 10) || ('1' != rv.charAt( rv.length() - 2 )) ) // not: 10-19 & 110-119, 210-219, ... 1010-1019, ... { switch ( rv.charAt( rv.length() - 1 ) ) { case '1': return rv + "st"; case '2': return rv + "nd"; case '3': return rv + "rd"; default: // 0th and n0th and 4th - 9th and n4th - n9th break; } } return rv + "th"; } public static int insureNonNegative( int pValue ) { return (pValue < 0) ? 0 : pValue; } public static int intValue( Integer pInteger, int pDefault ) { return (pInteger != null) ? pInteger : pDefault; } } |