34 lines
861 B
Java
34 lines
861 B
Java
package javass;
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/**
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* Gives a set of function to test conditions.
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* @author Charles BEAUVILLE
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* @author Celia HOUSSIAUX
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*
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*/
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public final class Preconditions {
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private Preconditions() {}
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/**
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* Checks if a boolean expression is true or throws exception.
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* @param b boolean expression on the arguments.
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* @throws IllegalArgumentException if b is false.
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*/
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public static void checkArgument(boolean b) {
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if(!b)
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throw new IllegalArgumentException();
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}
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/**
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* Checks if an index is positive and inferior to a size.
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* @throws IndexOutOfBoundsException if the index is bigger than the size or negative.
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* @return the given index if it is valid.
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*/
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public static int checkIndex(int index, int size) {
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if(index < 0 || index >= size)
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throw new IndexOutOfBoundsException();
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return index;
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}
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}
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