scolebourne 2003/08/01 16:11:55 Modified: lang/src/test/org/apache/commons/lang StringUtilsSubstringTest.java lang/src/java/org/apache/commons/lang StringUtils.java Log: Relax exceptions in left(), right() and mid() Revision Changes Path 1.12 +19 -19 jakarta-commons/lang/src/test/org/apache/commons/lang/StringUtilsSubstringTest.java Index: StringUtilsSubstringTest.java =================================================================== RCS file: /home/cvs/jakarta-commons/lang/src/test/org/apache/commons/lang/StringUtilsSubstringTest.java,v retrieving revision 1.11 retrieving revision 1.12 diff -u -r1.11 -r1.12 --- StringUtilsSubstringTest.java 1 Aug 2003 22:05:43 -0000 1.11 +++ StringUtilsSubstringTest.java 1 Aug 2003 23:11:54 -0000 1.12 @@ -139,30 +139,30 @@ assertSame(null, StringUtils.left(null, -1)); assertSame(null, StringUtils.left(null, 0)); assertSame(null, StringUtils.left(null, 2)); - assertSame("", StringUtils.left("", 0)); - assertSame("", StringUtils.left("", 2)); + + assertEquals("", StringUtils.left("", -1)); + assertEquals("", StringUtils.left("", 0)); + assertEquals("", StringUtils.left("", 2)); + + assertEquals("", StringUtils.left(FOOBAR, -1)); assertEquals("", StringUtils.left(FOOBAR, 0)); assertEquals(FOO, StringUtils.left(FOOBAR, 3)); assertSame(FOOBAR, StringUtils.left(FOOBAR, 80)); - try { - StringUtils.left(FOOBAR, -1); - fail(); - } catch (IllegalArgumentException ex) {} } public void testRight_String() { assertSame(null, StringUtils.right(null, -1)); assertSame(null, StringUtils.right(null, 0)); assertSame(null, StringUtils.right(null, 2)); - assertSame("", StringUtils.right("", 0)); - assertSame("", StringUtils.right("", 2)); + + assertEquals("", StringUtils.right("", -1)); + assertEquals("", StringUtils.right("", 0)); + assertEquals("", StringUtils.right("", 2)); + + assertEquals("", StringUtils.right(FOOBAR, -1)); assertEquals("", StringUtils.right(FOOBAR, 0)); assertEquals(BAR, StringUtils.right(FOOBAR, 3)); assertSame(FOOBAR, StringUtils.right(FOOBAR, 80)); - try { - StringUtils.right(FOOBAR, -1); - fail(); - } catch (IllegalArgumentException ex) {} } public void testMid_String() { @@ -170,8 +170,12 @@ assertSame(null, StringUtils.mid(null, 0, -1)); assertSame(null, StringUtils.mid(null, 3, 0)); assertSame(null, StringUtils.mid(null, 3, 2)); - assertSame("", StringUtils.mid("", 0, 0)); - assertSame("", StringUtils.mid("", 0, 2)); + + assertEquals("", StringUtils.mid("", 0, -1)); + assertEquals("", StringUtils.mid("", 0, 0)); + assertEquals("", StringUtils.mid("", 0, 2)); + + assertEquals("", StringUtils.mid(FOOBAR, 3, -1)); assertEquals("", StringUtils.mid(FOOBAR, 3, 0)); assertEquals("b", StringUtils.mid(FOOBAR, 3, 1)); assertEquals(FOO, StringUtils.mid(FOOBAR, 0, 3)); @@ -180,10 +184,6 @@ assertEquals(BAR, StringUtils.mid(FOOBAR, 3, 80)); assertEquals("", StringUtils.mid(FOOBAR, 9, 3)); assertEquals(FOO, StringUtils.mid(FOOBAR, -1, 3)); - try { - StringUtils.mid(FOOBAR, 0, -1); - fail(); - } catch (IllegalArgumentException ex) {} } //----------------------------------------------------------------------- 1.88 +7 -13 jakarta-commons/lang/src/java/org/apache/commons/lang/StringUtils.java Index: StringUtils.java =================================================================== RCS file: /home/cvs/jakarta-commons/lang/src/java/org/apache/commons/lang/StringUtils.java,v retrieving revision 1.87 retrieving revision 1.88 diff -u -r1.87 -r1.88 --- StringUtils.java 1 Aug 2003 23:01:52 -0000 1.87 +++ StringUtils.java 1 Aug 2003 23:11:55 -0000 1.88 @@ -1431,7 +1431,7 @@ * * <pre> * StringUtils.left(null, *) = null - * StringUtils.left(*, -ve) = IllegalArgumentException + * StringUtils.left(*, -ve) = "" * StringUtils.left("", *) = "" * StringUtils.left("abc", 0) = "" * StringUtils.left("abc", 2) = "ab" @@ -1441,14 +1441,13 @@ * @param str the String to get the leftmost characters from, may be null * @param len the length of the required String, must be zero or positive * @return the leftmost characters, <code>null</code> if null String input - * @throws IllegalArgumentException if len is less than zero */ public static String left(String str, int len) { if (str == null) { return null; } if (len < 0) { - throw new IllegalArgumentException("Requested String length " + len + " is less than zero"); + return ""; } if (str.length() <= len) { return str; @@ -1466,7 +1465,7 @@ * * <pre> * StringUtils.right(null, *) = null - * StringUtils.right(*, -ve) = IllegalArgumentException + * StringUtils.right(*, -ve) = "" * StringUtils.right("", *) = "" * StringUtils.right("abc", 0) = "" * StringUtils.right("abc", 2) = "bc" @@ -1476,14 +1475,13 @@ * @param str the String to get the rightmost characters from, may be null * @param len the length of the required String, must be zero or positive * @return the rightmost characters, <code>null</code> if null String input - * @throws IllegalArgumentException if len is less than zero */ public static String right(String str, int len) { if (str == null) { return null; } if (len < 0) { - throw new IllegalArgumentException("Requested String length " + len + " is less than zero"); + return ""; } if (str.length() <= len) { return str; @@ -1502,7 +1500,7 @@ * * <pre> * StringUtils.mid(null, *, *) = null - * StringUtils.mid(*, *, -ve) = IllegalArgumentException + * StringUtils.mid(*, *, -ve) = "" * StringUtils.mid("", 0, *) = "" * StringUtils.mid("abc", 0, 2) = "ab" * StringUtils.mid("abc", 0, 4) = "abc" @@ -1515,20 +1513,16 @@ * @param pos the position to start from, negative treated as zero * @param len the length of the required String, must be zero or positive * @return the middle characters, <code>null</code> if null String input - * @throws IllegalArgumentException if len is less than zero */ public static String mid(String str, int pos, int len) { if (str == null) { return null; } - if (pos > str.length()) { + if (len < 0 || pos > str.length()) { return ""; } if (pos < 0) { pos = 0; - } - if (len < 0) { - throw new IllegalArgumentException("Requested String length " + len + " is less than zero"); } if (str.length() <= (pos + len)) { return str.substring(pos);
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