CAMEL-11090 Add trimToNull method to StringHelper
Project: http://git-wip-us.apache.org/repos/asf/camel/repo Commit: http://git-wip-us.apache.org/repos/asf/camel/commit/112ef785 Tree: http://git-wip-us.apache.org/repos/asf/camel/tree/112ef785 Diff: http://git-wip-us.apache.org/repos/asf/camel/diff/112ef785 Branch: refs/heads/master Commit: 112ef7851ab85653c86be7d4359b1a0f35b35902 Parents: 39ae85b Author: Zoran Regvart <zregv...@apache.org> Authored: Wed Mar 29 13:14:29 2017 +0200 Committer: Zoran Regvart <zregv...@apache.org> Committed: Wed Mar 29 13:14:29 2017 +0200 ---------------------------------------------------------------------- .../org/apache/camel/util/StringHelper.java | 26 ++++++++++++++++++++ .../org/apache/camel/util/StringHelperTest.java | 9 +++++++ 2 files changed, 35 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/camel/blob/112ef785/camel-core/src/main/java/org/apache/camel/util/StringHelper.java ---------------------------------------------------------------------- diff --git a/camel-core/src/main/java/org/apache/camel/util/StringHelper.java b/camel-core/src/main/java/org/apache/camel/util/StringHelper.java index 7322be0..c3f987f 100644 --- a/camel-core/src/main/java/org/apache/camel/util/StringHelper.java +++ b/camel-core/src/main/java/org/apache/camel/util/StringHelper.java @@ -647,5 +647,31 @@ public final class StringHelper { return changed; } + /** + * Removes the leading and trailing whitespace and if the resulting + * string is empty returns {@code null}. Examples: + * <p> + * Examples: + * <blockquote><pre> + * trimToNull("abc") -> "abc" + * trimToNull(" abc") -> "abc" + * trimToNull(" abc ") -> "abc" + * trimToNull(" ") -> null + * trimToNull("") -> null + * </pre></blockquote> + */ + public static String trimToNull(final String given) { + if (given == null) { + return null; + } + + final String trimmed = given.trim(); + + if (trimmed.isEmpty()) { + return null; + } + + return trimmed; + } } http://git-wip-us.apache.org/repos/asf/camel/blob/112ef785/camel-core/src/test/java/org/apache/camel/util/StringHelperTest.java ---------------------------------------------------------------------- diff --git a/camel-core/src/test/java/org/apache/camel/util/StringHelperTest.java b/camel-core/src/test/java/org/apache/camel/util/StringHelperTest.java index 760971b..ca987d8 100644 --- a/camel-core/src/test/java/org/apache/camel/util/StringHelperTest.java +++ b/camel-core/src/test/java/org/apache/camel/util/StringHelperTest.java @@ -239,4 +239,13 @@ public class StringHelperTest extends TestCase { assertEquals(3, changed.get(1).intValue()); } + public void testTrimToNull() { + assertEquals(StringHelper.trimToNull("abc"),"abc"); + assertEquals(StringHelper.trimToNull(" abc") , "abc"); + assertEquals(StringHelper.trimToNull(" abc "),"abc"); + assertNull(StringHelper.trimToNull(" ")); + assertNull(StringHelper.trimToNull("\t")); + assertNull(StringHelper.trimToNull(" \t ")); + assertNull(StringHelper.trimToNull("")); + } }
