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Fixed #12. Added support for lastIndeOf function

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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
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src/main/java/strman/Strman.java
+50 -1
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@@ -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);