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Merge pull request #252 from vanitasvitae/requireNonNullOrEmpty

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Add Objects.requireNonNullOrEmpty
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Florian Schmaus 2018-07-17 11:59:06 +02:00 committed by GitHub
commit cf2b3ef634
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1 changed files with 9 additions and 0 deletions
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smack-core/src/main/java/org/jivesoftware/smack/util/Objects.java
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@ -16,6 +16,8 @@
*/ */
package org.jivesoftware.smack.util; package org.jivesoftware.smack.util;
import java.util.Collection;
public class Objects { public class Objects {
public static <T> T requireNonNull(T obj, String message) { public static <T> T requireNonNull(T obj, String message) {
@ -29,6 +31,13 @@ public class Objects {
return requireNonNull(obj, null); return requireNonNull(obj, null);
} }
public static <T extends Collection<?>> T requireNonNullOrEmpty(T collection, String message) {
if (requireNonNull(collection).isEmpty()) {
throw new IllegalArgumentException(message);
}
return collection;
}
public static boolean equals(Object a, Object b) { public static boolean equals(Object a, Object b) {
return a == b || (a != null && a.equals(b)); return a == b || (a != null && a.equals(b));
} }