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Code Releases Activity

Added support for collapseWhitespace function

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This commit is contained in:
Shekhar Gulati
2016-05-04 19:46:48 +05:30
parent 59da6a956f
commit aee5d512ad
3 changed files with 64 additions and 19 deletions
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src/main/java/strman/Strman.java
+28 -11
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@@ -3,6 +3,7 @@ package strman;
import java.util.Arrays;
import java.util.Optional;
import java.util.StringJoiner;
import java.util.function.Predicate;
import java.util.function.Supplier;
/**
@@ -10,6 +11,10 @@ import java.util.function.Supplier;
*/
public interface Strman {
Predicate<String> NULL_STRING_PREDICATE = str -> str == null;
Predicate<String> EMPTY_STRING_PREDICATE = str -> str.length() == 0;
Predicate<String> NULL_AND_EMPTY_STRING_PREDICATE = NULL_STRING_PREDICATE.and(EMPTY_STRING_PREDICATE);
String EMPTY_STRING = " ";
/**
* Appends Strings to value
@@ -30,7 +35,7 @@ public interface Strman {
* @return full String
*/
static String appendArray(final String value, final String[] appends) {
validate(value, () -> "'value' should be not null.");
validate(value, NULL_STRING_PREDICATE, () -> "'value' should be not null.");
if (appends == null || appends.length == 0) {
return value;
}
@@ -71,20 +76,14 @@ public interface Strman {
*/
static String[] between(final String value, final String start, final String end) {
validate(value, () -> "'value' should be not null.");
validate(start, () -> "'start' should be not null.");
validate(end, () -> "'end' should be not null.");
validate(value, NULL_STRING_PREDICATE, () -> "'value' should be not null.");
validate(start, NULL_STRING_PREDICATE, () -> "'start' should be not null.");
validate(end, NULL_STRING_PREDICATE, () -> "'end' should be not null.");
String[] parts = value.split(end);
return Arrays.stream(parts).map(subPart -> subPart.substring(subPart.indexOf(start) + start.length())).toArray(String[]::new);
}
static void validate(final String value, final Supplier<String> supplier) {
if (value == null) {
throw new IllegalArgumentException(supplier.get());
}
}
/**
* Returns a String array consisting of the characters in the String.
*
@@ -96,7 +95,7 @@ public interface Strman {
* The other implementation of this could be using String's split method
* String[] chars = value.split("")
*/
validate(value, () -> "'value' should be not null.");
validate(value, NULL_STRING_PREDICATE, () -> "'value' should be not null.");
int length = value.length();
String[] result = new String[length];
for (int i = 0; i < length; i++) {
@@ -104,4 +103,22 @@ public interface Strman {
}
return result;
}
/**
* Replace consecutive whitespace characters with a single space.
*
* @param value input String
* @return collapsed String
*/
static String collapseWhitespace(final String value) {
validate(value, NULL_STRING_PREDICATE, () -> "'value' should be not null.");
return value.trim().replaceAll("\\s\\s+", " ");
}
static void validate(String value, Predicate<String> predicate, final Supplier<String> supplier) {
if (predicate.test(value)) {
throw new IllegalArgumentException(supplier.get());
}
}
}