Created
April 16, 2016 17:22
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Some Pre conditions/assertions that one would encounter in everyday programming
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| public class PreCondition { | |
| public static <T> void checkNull(final T t, final String errorMsg){ | |
| if(t==null){ | |
| throw new IllegalArgumentException(errorMsg); | |
| } | |
| } | |
| public static void checkEmptyString(final String str, final String errorMsg){ | |
| if(!Strings.hasText(str)){ | |
| throw new IllegalArgumentException(errorMsg); | |
| } | |
| } | |
| public static <T> void checkEmptyCollection(final Collection<T> collection,final String errorMsg){ | |
| if(collection == null || collection.isEmpty()){ | |
| throw new IllegalArgumentException(errorMsg); | |
| } | |
| } | |
| public static void checkExpression(final boolean expression ,final String errorMsg){ | |
| if(expression){ | |
| throw new IllegalArgumentException(errorMsg); | |
| } | |
| } | |
| } |
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