Alawn/strman-java
1
0
Fork 0
mirror of https://github.com/shekhargulati/strman-java.git synced 2026-10-20 14:34:04 +00:00
Code Releases Activity

Fixed #12. Added support for lastIndeOf function

Browse Source
This commit is contained in:
Shekhar Gulati
2016-05-21 17:50:39 +05:30
parent cfed475891
commit ce81fb1070
2 changed files with 72 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/main/java/strman/Strman.java
+50 -1
View File
@@ -17,6 +17,9 @@ public abstract class Strman {
private static final Predicate<String> NULL_STRING_PREDICATE = str -> str == null;
private static final Supplier<String> NULL_STRING_MSG_SUPPLIER = () -> "'value' should be not null.";
private Strman() {
}
/**
* Appends Strings to value
*
@@ -547,13 +550,59 @@ public abstract class Strman {
* @param value The input String
* @return true if Object is a String false otherwise
*/
public static boolean isString(Object value) {
public static boolean isString(final Object value) {
if (Objects.isNull(value)) {
throw new IllegalArgumentException("value can't be null");
}
return value instanceof String;
}
/**
* This method returns the index within the calling String object of the last occurrence of the specified value, searching backwards from the offset.
* Returns -1 if the value is not found. The search starts from the end and case sensitive.
*
* @param value The input String
* @param needle The search String
* @return Return position of the last occurrence of 'needle'.
*/
public static int lastIndexOf(final String value, final String needle) {
validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
return lastIndexOf(value, needle, value.length(), true);
}
/**
* This method returns the index within the calling String object of the last occurrence of the specified value, searching backwards from the offset.
* Returns -1 if the value is not found. The search starts from the end and case sensitive.
*
* @param value The input String
* @param needle The search String
* @return Return position of the last occurrence of 'needle'.
*/
public static int lastIndexOf(final String value, final String needle, boolean caseSensitive) {
validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
return lastIndexOf(value, needle, value.length(), caseSensitive);
}
/**
* This method returns the index within the calling String object of the last occurrence of the specified value, searching backwards from the offset.
* Returns -1 if the value is not found.
*
* @param value The input String
* @param needle The search String
* @param offset The index to start search from
* @param caseSensitive whether search should be case sensitive
* @return Return position of the last occurrence of 'needle'.
*/
public static int lastIndexOf(final String value, final String needle, final int offset, final boolean caseSensitive) {
validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
validate(needle, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
if (caseSensitive) {
return value.lastIndexOf(needle, offset);
}
return value.toLowerCase().lastIndexOf(needle.toLowerCase(), offset);
}
public static String decode(final String value, final int digits, final int radix) {
validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
src/test/java/strman/StrmanTest.java
+22
View File
@@ -453,4 +453,26 @@ public class StrmanTest {
assertTrue(isString("string"));
assertTrue(isString(""));
}
@Test
public void lastIndexOf_shouldFindIndexOfNeedle() throws Exception {
final String value = "foobarfoobar";
assertThat(lastIndexOf(value, "f"), equalTo(6));
assertThat(lastIndexOf(value, "o"), equalTo(8));
assertThat(lastIndexOf(value, "b"), equalTo(9));
assertThat(lastIndexOf(value, "a"), equalTo(10));
assertThat(lastIndexOf(value, "r"), equalTo(11));
assertThat(lastIndexOf(value, "t"), equalTo(-1));
}
@Test
public void lastIndexOf_shouldFindIndexOfNeedleCaseInsensitive() throws Exception {
final String value = "foobarfoobar";
assertThat(lastIndexOf(value, "F", false), equalTo(6));
assertThat(lastIndexOf(value, "O", false), equalTo(8));
assertThat(lastIndexOf(value, "B", false), equalTo(9));
assertThat(lastIndexOf(value, "A", false), equalTo(10));
assertThat(lastIndexOf(value, "R", false), equalTo(11));
assertThat(lastIndexOf(value, "T", false), equalTo(-1));
}
}