X-Git-Url: http://www2.svjatoslav.eu/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Feu%2Fsvjatoslav%2Fcommons%2Fstring%2FString2.java;h=8d7273d8235bbfe0bbb28b294169fc22f6fa753f;hb=5cb739fecf46c9720fbdcb093364d55055d0d1f6;hp=504c41d876a2ff24c52e18e17a27d4a63a2195ce;hpb=1195d9ce07d2e4f2d4c2a7d67dc0bd657556e2c7;p=svjatoslav_commons.git

diff --git a/src/main/java/eu/svjatoslav/commons/string/String2.java b/src/main/java/eu/svjatoslav/commons/string/String2.java
index 504c41d..8d7273d 100755
--- a/src/main/java/eu/svjatoslav/commons/string/String2.java
+++ b/src/main/java/eu/svjatoslav/commons/string/String2.java
@@ -1,28 +1,46 @@
 /*
- * Svjatoslav Commons - shared library of common functionality.
- * Copyright ©2012-2017, Svjatoslav Agejenko, svjatoslav@svjatoslav.eu
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 3 of the GNU Lesser General Public License
- * or later as published by the Free Software Foundation.
+ * Svjatoslav Commons - shared library of common functionality. Author: Svjatoslav Agejenko.
+ * This project is released under Creative Commons Zero (CC0) license.
  */
-
 package eu.svjatoslav.commons.string;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 public class String2 {
 
-    private final List<Character> chars;
+    private final List<Character> chars = new ArrayList<>();
 
-    public String2(final String value) {
-        chars = new ArrayList<>(value.length());
-        for (final Character c : value.toCharArray())
-            chars.add(c);
+    public String2 clear(){
+        chars.clear();
+        return this;
+    }
+
+    public String2(String value) {
+        append(value);
     }
 
-    public String2 addPrefix(final String prefix) {
+    public String2() {
+    }
+
+    public String2 repeat(int count){
+        if (count > 0) {
+            String value = toString();
+
+            for (int i = 1; i < count; i++)
+                append(value);
+        } else {
+            clear();
+        }
+        return this;
+    }
+
+    public String2 prepend(final String prefix) {
+        if (prefix == null)
+            return this;
+
         int i = 0;
         for (final char c : prefix.toCharArray())
             chars.add(i++, c);
@@ -30,13 +48,31 @@ public class String2 {
         return this;
     }
 
-    public String2 addSuffix(final String suffix) {
+    public String2 append(final String suffix) {
+        if (suffix == null)
+            return this;
+
         for (final char c : suffix.toCharArray())
             chars.add(c);
 
         return this;
     }
 
+    public String2 appendWithSeparator(String separator, final String suffix) {
+        if (!isEmpty())
+            append(separator);
+
+        append(suffix);
+
+        return this;
+    }
+
+    public String2 append(String s, int times) {
+        for (int i = 0; i < times; i++) append(s);
+        return this;
+    }
+
+
     /**
      * Cut given amount of characters from the left of the string.
      *
@@ -55,14 +91,17 @@ public class String2 {
         return this;
     }
 
-    public String2 trimPrefixIfExists(String prefix){
+    public String2 trimPrefixIfExists(String prefix) {
+        if (prefix == null)
+            return this;
+
         if (hasPrefix(prefix))
             trimPrefix(prefix.length());
 
         return this;
     }
 
-    public String2 trimSuffixIfExists(String suffix){
+    public String2 trimSuffixIfExists(String suffix) {
         if (hasSuffix(suffix))
             trimSuffix(suffix.length());
 
@@ -71,13 +110,13 @@ public class String2 {
 
     public String2 trimSuffix(int charsToTrim) {
 
-        if (charsToTrim > chars.size()){
+        if (charsToTrim > chars.size()) {
             chars.clear();
             return this;
         }
 
-        for (int i = 0; i<charsToTrim; i++)
-            chars.remove(chars.size()-1);
+        for (int i = 0; i < charsToTrim; i++)
+            chars.remove(chars.size() - 1);
 
         return this;
     }
@@ -86,11 +125,11 @@ public class String2 {
         return contains(suffix, getLength() - suffix.length());
     }
 
-    public boolean hasPrefix(String prefix){
+    public boolean hasPrefix(String prefix) {
         return contains(prefix, 0);
     }
 
-    public boolean contains(String fragment, int index){
+    public boolean contains(String fragment, int index) {
         if (index + fragment.length() > chars.size())
             return false;
 
@@ -136,4 +175,19 @@ public class String2 {
     public String toString() {
         return getSubString(0, chars.size());
     }
+
+
+    public static String[] getGroups(String s, String regexp){
+        Pattern pattern = Pattern.compile(regexp);
+        Matcher matcher = pattern.matcher(s);
+
+        matcher.find();
+        String[] result = new String[matcher.groupCount()];
+
+        for (int i = 0; i< result.length; i++){
+            result[i] = matcher.group(i+1);
+        }
+
+        return result;
+    }
 }