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Diffstat (limited to 'src/com/isode/stroke/base')
-rw-r--r-- | src/com/isode/stroke/base/NotNull.java | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/com/isode/stroke/base/NotNull.java b/src/com/isode/stroke/base/NotNull.java new file mode 100644 index 0000000..f9bc87a --- /dev/null +++ b/src/com/isode/stroke/base/NotNull.java @@ -0,0 +1,36 @@ +/* + * Copyright (c) 2012, Isode Limited, London, England. + * All rights reserved. + */ + +package com.isode.stroke.base; + +/** + * Helper to check for nulls. + */ +public class NotNull { + + /** + * Throws a NullPointerException if null. + * @param o Object to check for non-nullness + */ + public static void exceptIfNull(Object o) { + if (o == null) { + throw new NullPointerException(); + } + } + + /** + * Throws a NullPointerException if null. + * @param o Object to check for non-nullness + * @param name Variable name to include in error. + */ + public static void exceptIfNull(Object o, String name) { + if (name == null) { + throw new NullPointerException("Variable name passed to exceptIfNull must not be null"); + } + if (o == null) { + throw new NullPointerException(name + " must not be null"); + } + } +} |