Prepare changes to version 3. Refactored package and methods. Normalized

methods.

src/fr/devinsy/util/FileTools.java

@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2008-2014 Christian Pierre MOMON
+ * Copyright (C) 2008-2015 Christian Pierre MOMON
  * 
  * This file is part of Devinsy-utils.
  * 
@@ -32,14 +32,16 @@ import java.io.UnsupportedEncodingException;
 import java.net.URL;
 
 import fr.devinsy.util.strings.StringList;
+import fr.devinsy.util.strings.StringListUtils;
 
 /**
  * 
- * @author cpm
+ * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
- * 
  */
 public class FileTools
 {
+	public static final String DEFAULT_CHARSET_NAME = "UTF-8";
+
 	/**
 	 * 
 	 * 
@@ -151,7 +153,10 @@ public class FileTools
 	 *            Source.
 	 * 
 	 * @return Extension value or null.
+	 * @deprecated See
+	 *             <code>org.apache.commons.io.FilenameUtils.getExtension</code>
 	 */
+	@Deprecated
 	public static String getExtension(final String fileName)
 	{
 		String result;
@@ -187,7 +192,6 @@ public class FileTools
 	{
 		String result;
 
-		final String DEFAULT_CHARSET_NAME = "UTF-8";
 		result = load(source, DEFAULT_CHARSET_NAME);
 
 		//
@@ -219,7 +223,6 @@ public class FileTools
 	{
 		String result;
 
-		final String DEFAULT_CHARSET_NAME = "UTF-8";
 		result = load(source, DEFAULT_CHARSET_NAME);
 
 		//
@@ -246,6 +249,36 @@ public class FileTools
 		return result;
 	}
 
+	/**
+	 * 
+	 * @param file
+	 * @throws IOException
+	 */
+	public static StringList loadStringList(final File source) throws IOException
+	{
+		StringList result;
+
+		result = loadStringList(source, DEFAULT_CHARSET_NAME);
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param file
+	 * @throws IOException
+	 */
+	public static StringList loadStringList(final File file, final String charsetName) throws IOException
+	{
+		StringList result;
+
+		result = StringListUtils.load(file, charsetName);
+
+		//
+		return result;
+	}
+
 	/**
 	 * 
 	 * @param file
@@ -255,7 +288,6 @@ public class FileTools
 	{
 		StringBuffer result;
 
-		final String DEFAULT_CHARSET_NAME = "UTF-8";
 		result = loadToStringBuffer(source, DEFAULT_CHARSET_NAME);
 
 		//
@@ -321,7 +353,6 @@ public class FileTools
 	{
 		StringList result;
 
-		final String DEFAULT_CHARSET_NAME = "UTF-8";
 		result = loadToStringList(source, DEFAULT_CHARSET_NAME);
 
 		//
@@ -388,7 +419,6 @@ public class FileTools
 	{
 		StringList result;
 
-		final String DEFAULT_CHARSET_NAME = "UTF-8";
 		result = loadToStringList(source, DEFAULT_CHARSET_NAME);
 
 		//
@@ -405,10 +435,7 @@ public class FileTools
 		StringList result;
 
 		//
-		result = new StringList();
+		result = StringListUtils.load(source, charsetName);
-
-		//
-		read(result, source.openStream(), charsetName);
 
 		//
 		return result;
@@ -459,56 +486,16 @@ public class FileTools
 		}
 	}
 
-	/**
-	 * 
-	 * @param file
-	 * @throws IOException
-	 */
-	public static void read(final StringList out, final InputStream is, final String charsetName) throws IOException
-	{
-		BufferedReader in = null;
-		try
-		{
-			in = new BufferedReader(new InputStreamReader(is, charsetName));
-
-			boolean ended = false;
-
-			while (!ended)
-			{
-				String line = in.readLine();
-
-				if (line == null)
-				{
-					ended = true;
-				}
-				else
-				{
-					out.append(line);
-				}
-			}
-		}
-		finally
-		{
-			try
-			{
-				if (in != null)
-				{
-					in.close();
-				}
-			}
-			catch (IOException exception)
-			{
-				exception.printStackTrace();
-			}
-		}
-	}
-
 	/**
 	 * 
 	 * @param source
 	 * @param extension
 	 * @return
+	 * 
+	 * @deprecated See
+	 *             <code>org.apache.commons.io.FilenameUtils.removeExtension</code>
 	 */
+	@Deprecated
 	public static String removeExtension(final String source)
 	{
 		String result;
@@ -547,7 +534,7 @@ public class FileTools
 		PrintWriter out = null;
 		try
 		{
-			out = new PrintWriter(new OutputStreamWriter(new FileOutputStream(file), "UTF-8"));
+			out = new PrintWriter(new OutputStreamWriter(new FileOutputStream(file), DEFAULT_CHARSET_NAME));
 
 			out.println(source);
 		}
@@ -568,20 +555,7 @@ public class FileTools
 	 */
 	public static void save(final File file, final StringBuffer source) throws UnsupportedEncodingException, FileNotFoundException
 	{
-		PrintWriter out = null;
+		save(file, source.toString());
-		try
-		{
-			out = new PrintWriter(new OutputStreamWriter(new FileOutputStream(file), "UTF-8"));
-
-			out.println(source.toString());
-		}
-		finally
-		{
-			if (out != null)
-			{
-				out.close();
-			}
-		}
 	}
 
 	/**
@@ -592,20 +566,7 @@ public class FileTools
 	 */
 	public static void save(final File file, final StringList source) throws UnsupportedEncodingException, FileNotFoundException
 	{
-		PrintWriter out = null;
+		StringListUtils.save(file, source);
-		try
-		{
-			out = new PrintWriter(new OutputStreamWriter(new FileOutputStream(file), "UTF-8"));
-
-			out.println(source.toString());
-		}
-		finally
-		{
-			if (out != null)
-			{
-				out.close();
-			}
-		}
 	}
 
 	/**

src/fr/devinsy/util/strings/BufferedStringListReader.java

@@ -0,0 +1,46 @@
+package fr.devinsy.util.strings;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+
+/**
+ * 
+ * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
+ * 
+ */
+public class BufferedStringListReader implements StringListReader
+{
+	private BufferedReader in;
+
+	/**
+	 * 
+	 * @param in
+	 */
+	public BufferedStringListReader(final BufferedReader in)
+	{
+		this.in = in;
+	}
+
+	/**
+	 * 
+	 */
+	@Override
+	public void close()
+	{
+
+	}
+
+	/**
+	 * 
+	 */
+	@Override
+	public String readLine() throws IOException
+	{
+		String result;
+
+		result = this.in.readLine();
+
+		//
+		return result;
+	}
+}

src/fr/devinsy/util/strings/StringLengthComparator.java

@@ -0,0 +1,128 @@
+package fr.devinsy.util.strings;
+
+import java.util.Comparator;
+
+/**
+ * 
+ */
+public class StringLengthComparator implements Comparator<String>
+{
+	private static StringLengthComparator instance;
+
+	/**
+	 * 
+	 */
+	@Override
+	public int compare(final String alpha, final String bravo)
+	{
+		int result;
+
+		//
+		Integer alphaValue;
+		if (alpha == null)
+		{
+			//
+			alphaValue = null;
+
+		}
+		else
+		{
+			//
+			alphaValue = alpha.length();
+		}
+
+		//
+		Integer bravoValue;
+		if (bravo == null)
+		{
+			//
+			bravoValue = null;
+
+		}
+		else
+		{
+			//
+			bravoValue = bravo.length();
+		}
+
+		//
+		result = compare(alphaValue, bravoValue);
+
+		//
+		return result;
+	}
+
+	/**
+	 * This method compares two nullable string values.
+	 * 
+	 * The comparison manages the local language alphabet order.
+	 * 
+	 * <pre>
+	 * compare(null, null)   = 0
+	 * compare(null, bravo)  < 0
+	 * compare(alpha, null)  > 0
+	 * compare(alpha, bravo) = alpha.compareTo(bravo)
+	 * </pre>
+	 * 
+	 * @param alpha
+	 *            one of the value.
+	 * 
+	 * @param bravo
+	 *            the other value.
+	 * 
+	 * @return zero or a positive value or a negative value.
+	 * 
+	 */
+	public static int compare(final Integer alpha, final Integer bravo)
+	{
+		int result;
+
+		//
+		if ((alpha == null) && (bravo == null))
+		{
+			//
+			result = 0;
+
+		}
+		else if (alpha == null)
+		{
+			//
+			result = -1;
+
+		}
+		else if (bravo == null)
+		{
+			//
+			result = +1;
+
+		}
+		else
+		{
+			//
+			result = alpha.compareTo(bravo);
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @return
+	 */
+	public static StringLengthComparator instance()
+	{
+		StringLengthComparator result;
+
+		if (instance == null)
+		{
+			instance = new StringLengthComparator();
+		}
+
+		result = instance;
+
+		//
+		return result;
+	}
+
+}

src/fr/devinsy/util/strings/StringList.java

@@ -23,11 +23,16 @@ import java.text.Collator;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.Comparator;
+import java.util.Iterator;
+
+import org.apache.commons.lang3.StringUtils;
 
 /**
  * This class is a collection of String objects with specific methods. It makes
  * possible to build a string without any copy. The goal is to optimize the
  * building of strings where they are lot of concatenation action.
+ * 
  */
 public class StringList extends ArrayList<String> implements CharSequence
 {
@@ -161,28 +166,6 @@ public class StringList extends ArrayList<String> implements CharSequence
 		return (result);
 	}
 
-	/**
-	 * Appends the string representation of the Double argument to this string
-	 * list.
-	 * 
-	 * @param value
-	 * @return
-	 */
-	public StringList append(final Double value)
-	{
-		StringList result;
-
-		if (value != null)
-		{
-			this.append(String.valueOf(value));
-		}
-
-		result = this;
-
-		//
-		return (result);
-	}
-
 	/**
 	 * Appends the string representation of the int argument to this string
 	 * list.
@@ -217,6 +200,45 @@ public class StringList extends ArrayList<String> implements CharSequence
 		return (result);
 	}
 
+	/**
+	 * Appends the string representation of the int argument to this string
+	 * list.
+	 * 
+	 * @param value
+	 * @return
+	 */
+	public StringList append(final Object value)
+	{
+		StringList result;
+
+		if (value != null)
+		{
+			this.append(value.toString());
+		}
+
+		result = this;
+
+		//
+		return (result);
+	}
+
+	/**
+	 * Appends the string representation of the long argument to this string
+	 * list.
+	 * 
+	 * @param value
+	 * @return
+	 */
+	public StringList append(final short value)
+	{
+		StringList result;
+
+		result = this.append(String.valueOf(value));
+
+		//
+		return (result);
+	}
+
 	/**
 	 * Appends the string argument to this string list.
 	 * 
@@ -358,6 +380,36 @@ public class StringList extends ArrayList<String> implements CharSequence
 		return (result);
 	}
 
+	/**
+	 * 
+	 * @param value
+	 * @return
+	 */
+	public StringList appendln(final Object value)
+	{
+		StringList result;
+
+		result = this.append(value).appendln();
+
+		//
+		return (result);
+	}
+
+	/**
+	 * 
+	 * @param value
+	 * @return
+	 */
+	public StringList appendln(final short value)
+	{
+		StringList result;
+
+		result = this.append(value).appendln();
+
+		//
+		return (result);
+	}
+
 	/**
 	 * 
 	 * @param string
@@ -406,6 +458,22 @@ public class StringList extends ArrayList<String> implements CharSequence
 		return result;
 	}
 
+	/**
+	 * 
+	 * @param position
+	 * @return
+	 */
+	public char charAt(final StringListCharPosition position)
+	{
+		char result;
+
+		//
+		result = get(position.getStringIndex()).charAt(position.getLocalCharIndex());
+
+		//
+		return result;
+	}
+
 	/**
 	 * Deep copy and shallow copy have no sense about a list of immutable
 	 * objects.
@@ -428,6 +496,150 @@ public class StringList extends ArrayList<String> implements CharSequence
 		return result;
 	}
 
+	/**
+	 * 
+	 * @param source
+	 * @return
+	 */
+	public boolean containsAny(final Collection<String> target)
+	{
+		boolean result;
+
+		if (target == null)
+		{
+			result = false;
+		}
+		else
+		{
+			boolean ended = false;
+			Iterator<String> iterator = target.iterator();
+			result = false;
+			while (!ended)
+			{
+				if (iterator.hasNext())
+				{
+					String current = iterator.next();
+
+					if (this.contains(current))
+					{
+						ended = true;
+						result = true;
+					}
+				}
+				else
+				{
+					ended = true;
+					result = false;
+				}
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @return
+	 */
+	public boolean containsBlank()
+	{
+		boolean result;
+
+		boolean ended = false;
+		Iterator<String> iterator = iterator();
+		result = false;
+		while (!ended)
+		{
+			if (iterator.hasNext())
+			{
+				String line = iterator.next();
+
+				if (StringUtils.isBlank(line))
+				{
+					ended = true;
+					result = true;
+				}
+			}
+			else
+			{
+				ended = false;
+				result = false;
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @return
+	 */
+	public boolean containsEmpty()
+	{
+		boolean result;
+
+		boolean ended = false;
+		Iterator<String> iterator = iterator();
+		result = false;
+		while (!ended)
+		{
+			if (iterator.hasNext())
+			{
+				String line = iterator.next();
+
+				if (StringUtils.isEmpty(line))
+				{
+					ended = true;
+					result = true;
+				}
+			}
+			else
+			{
+				ended = false;
+				result = false;
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @return
+	 */
+	public boolean containsNull()
+	{
+		boolean result;
+
+		boolean ended = false;
+		Iterator<String> iterator = iterator();
+		result = false;
+		while (!ended)
+		{
+			if (iterator.hasNext())
+			{
+				String line = iterator.next();
+
+				if (line == null)
+				{
+					ended = true;
+					result = true;
+				}
+			}
+			else
+			{
+				ended = false;
+				result = false;
+			}
+		}
+
+		//
+		return result;
+	}
+
 	/**
 	 * 
 	 * @param id
@@ -485,6 +697,192 @@ public class StringList extends ArrayList<String> implements CharSequence
 		return (result);
 	}
 
+	/**
+	 * 
+	 * @return
+	 */
+	public String getLongestBytesLine()
+	{
+		String result;
+
+		if (isEmpty())
+		{
+			result = null;
+		}
+		else
+		{
+			int max = 0;
+			result = "";
+			for (String line : this)
+			{
+				if (line.getBytes().length > max)
+				{
+					max = line.length();
+					result = line;
+				}
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @return
+	 */
+	public String getLongestLine()
+	{
+		String result;
+
+		if (isEmpty())
+		{
+			result = null;
+		}
+		else
+		{
+			int max = 0;
+			result = "";
+			for (String line : this)
+			{
+				if (line.length() > max)
+				{
+					max = line.length();
+					result = line;
+				}
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @return
+	 */
+	public StringList getNotBlank()
+	{
+		StringList result;
+
+		result = new StringList();
+
+		for (String line : this)
+		{
+			if (StringUtils.isNotBlank(line))
+			{
+				result.add(line);
+			}
+		}
+
+		//
+		return (result);
+	}
+
+	/**
+	 * 
+	 * @return
+	 */
+	public StringList getNotEmpty()
+	{
+		StringList result;
+
+		result = new StringList();
+
+		for (String line : this)
+		{
+			if (StringUtils.isNotEmpty(line))
+			{
+				result.add(line);
+			}
+		}
+
+		//
+		return (result);
+	}
+
+	/**
+	 * 
+	 * @return
+	 */
+	public StringList getNotNull()
+	{
+		StringList result;
+
+		result = new StringList();
+
+		for (String line : this)
+		{
+			if (line != null)
+			{
+				result.add(line);
+			}
+		}
+
+		//
+		return (result);
+	}
+
+	/**
+	 * 
+	 * @return
+	 */
+	public String getShortestBytesLine()
+	{
+		String result;
+
+		if (isEmpty())
+		{
+			result = null;
+		}
+		else
+		{
+			int min = Integer.MAX_VALUE;
+			result = null;
+			for (String line : this)
+			{
+				if (line.getBytes().length < min)
+				{
+					min = line.length();
+					result = line;
+				}
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @return
+	 */
+	public String getShortestLine()
+	{
+		String result;
+
+		if (isEmpty())
+		{
+			result = null;
+		}
+		else
+		{
+			int min = Integer.MAX_VALUE;
+			result = null;
+			for (String line : this)
+			{
+				if (line.length() < min)
+				{
+					min = line.length();
+					result = line;
+				}
+			}
+		}
+
+		//
+		return result;
+	}
+
 	/**
 	 * 
 	 * @param index
@@ -526,6 +924,148 @@ public class StringList extends ArrayList<String> implements CharSequence
 
 	/**
 	 * 
+	 * @param startIndex
+	 * @return the index of the next line not null, -1 otherwise.
+	 */
+	public int indexOfNextLineNotNull(final int startIndex)
+	{
+		int result;
+
+		boolean ended = false;
+		int currentIndex = startIndex;
+		result = -1;
+		while (!ended)
+		{
+			if (currentIndex >= this.size())
+			{
+				ended = true;
+				result = -1;
+			}
+			else
+			{
+				if (this.get(currentIndex) == null)
+				{
+					ended = true;
+					result = currentIndex;
+				}
+				else
+				{
+					currentIndex += 1;
+				}
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param position
+	 * @return
+	 */
+	public boolean isOutOfBounds(final StringListCharPosition position)
+	{
+		boolean result;
+
+		if (position == null)
+		{
+			result = true;
+		}
+		else
+		{
+			if (isOutOfList(position))
+			{
+				result = true;
+			}
+			else if (isOutOfLine(position))
+			{
+				result = true;
+			}
+			else
+			{
+				result = false;
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param position
+	 * @return
+	 */
+	public boolean isOutOfLine(final StringListCharPosition position)
+	{
+		boolean result;
+
+		if (position == null)
+		{
+			result = true;
+		}
+		else
+		{
+			if (position.getLocalCharIndex() >= this.get(position.getStringIndex()).length())
+			{
+				result = true;
+			}
+			else
+			{
+				result = false;
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param position
+	 * @return
+	 */
+	public boolean isOutOfList(final StringListCharPosition position)
+	{
+		boolean result;
+
+		if (position == null)
+		{
+			result = true;
+		}
+		else
+		{
+			if (position.getStringIndex() >= this.size())
+			{
+				result = true;
+			}
+			else
+			{
+				result = false;
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 */
+	public Iterator<Character> iteratorOfChar()
+	{
+		Iterator<Character> result;
+
+		result = new StringListCharIterator(this);
+
+		//
+		return result;
+	}
+
+	/**
+	 * Returns the length of the string list concatenation. Null strings are
+	 * ignored.
 	 */
 	@Override
 	public int length()
@@ -533,9 +1073,11 @@ public class StringList extends ArrayList<String> implements CharSequence
 		int result = 0;
 
 		for (String string : this)
+		{
+			if (string != null)
 			{
 				result += string.length();
-
+			}
 		}
 
 		//
@@ -619,6 +1161,24 @@ public class StringList extends ArrayList<String> implements CharSequence
 		return (result);
 	}
 
+	/**
+	 * Sorts this list.
+	 * 
+	 * @return This List.
+	 */
+	public StringList reverse()
+	{
+		StringList result;
+
+		Collections.reverse(this);
+
+		//
+		result = this;
+
+		//
+		return result;
+	}
+
 	/**
 	 * Sorts this list.
 	 * 
@@ -637,6 +1197,42 @@ public class StringList extends ArrayList<String> implements CharSequence
 		return result;
 	}
 
+	/**
+	 * Sorts this list.
+	 * 
+	 * @return This List.
+	 */
+	public StringList sort(final Comparator<String> comparator)
+	{
+		StringList result;
+
+		Collections.sort(this, comparator);
+
+		//
+		result = this;
+
+		//
+		return result;
+	}
+
+	/**
+	 * Sorts this list.
+	 * 
+	 * @return This List.
+	 */
+	public StringList sortByLength()
+	{
+		StringList result;
+
+		Collections.sort(this, StringLengthComparator.instance());
+
+		//
+		result = this;
+
+		//
+		return result;
+	}
+
 	/**
 	 * {@inheritDoc}
 	 */
@@ -844,6 +1440,43 @@ public class StringList extends ArrayList<String> implements CharSequence
 		return (result);
 	}
 
+	/**
+	 * 
+	 * @param strings
+	 * @return
+	 */
+	public String toStringWithBracket()
+	{
+		String result;
+
+		result = toString("[", ",", "]");
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param source
+	 * @return
+	 */
+	public String toStringWithBrackets()
+	{
+		String result;
+
+		StringList buffer = new StringList();
+
+		for (String string : this)
+		{
+			buffer.append("[").append(string).append("]");
+		}
+
+		result = buffer.toString();
+
+		//
+		return result;
+	}
+
 	/**
 	 * 
 	 * @return

src/fr/devinsy/util/strings/StringListCharIterator.java

@@ -0,0 +1,133 @@
+/**
+ * Copyright (C) 2014-2015 Christian Pierre MOMON
+ * 
+ * This file is part of Devinsy-utils.
+ * 
+ * Devinsy-utils is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * Devinsy-utils is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Devinsy-utils.  If not, see <http://www.gnu.org/licenses/>
+ */
+package fr.devinsy.util.strings;
+
+import java.util.Iterator;
+
+/**
+ * 
+ */
+public class StringListCharIterator implements Iterator<Character>
+{
+	private StringList source;
+	private StringListCharPosition currentPosition;
+	private StringListCharPosition nextPosition;
+
+	/**
+	 *
+	 */
+	public StringListCharIterator(final StringList source)
+	{
+		super();
+
+		this.source = source;
+		this.nextPosition = new StringListCharPosition();
+	}
+
+	/**
+	 * 
+	 */
+	@Override
+	public boolean hasNext()
+	{
+		boolean result;
+
+		if (this.source == null)
+		{
+			result = false;
+		}
+		else
+		{
+			if (this.source.isOutOfBounds(this.nextPosition))
+			{
+				result = false;
+			}
+			else
+			{
+				result = true;
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 */
+	@Override
+	public Character next()
+	{
+		Character result;
+
+		if (this.source == null)
+		{
+			result = null;
+		}
+		else
+		{
+			if (hasNext())
+			{
+				result = this.source.charAt(this.nextPosition);
+
+				this.nextPosition.next();
+
+				if (this.source.isOutOfLine(this.nextPosition))
+				{
+					this.nextPosition.nextEndOfLine();
+
+					while ((!this.source.isOutOfList(this.nextPosition)) && (this.source.get(this.nextPosition.getStringIndex()) == null))
+					{
+						this.nextPosition.nextEndOfLine();
+					}
+				}
+			}
+			else
+			{
+				result = null;
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @return
+	 */
+	public StringListCharPosition nextPosition()
+	{
+		StringListCharPosition result;
+
+		result = new StringListCharPosition(this.nextPosition);
+
+		//
+		return result;
+	}
+
+	/**
+	 * Do nothing.
+	 */
+	@Override
+	public void remove()
+	{
+		// TODO or not TODO?
+	}
+}

src/fr/devinsy/util/strings/StringListCharPosition.java

@@ -29,6 +29,19 @@ public class StringListCharPosition
 	private int stringIndex;
 	private int localCharIndex;
 
+	/**
+	 * 
+	 * @param index
+	 * @param stringIndex
+	 * @param localIndex
+	 */
+	public StringListCharPosition()
+	{
+		this.charIndex = 0;
+		this.stringIndex = 0;
+		this.localCharIndex = 0;
+	}
+
 	/**
 	 * 
 	 * @param index
@@ -42,6 +55,17 @@ public class StringListCharPosition
 		this.localCharIndex = localIndex;
 	}
 
+	/**
+	 * 
+	 * @param source
+	 */
+	public StringListCharPosition(final StringListCharPosition source)
+	{
+		this.charIndex = source.getCharIndex();
+		this.stringIndex = source.getStringIndex();
+		this.localCharIndex = source.getLocalCharIndex();
+	}
+
 	public int getCharIndex()
 	{
 		return this.charIndex;
@@ -57,6 +81,18 @@ public class StringListCharPosition
 		return this.stringIndex;
 	}
 
+	public void next()
+	{
+		this.charIndex += 1;
+		this.localCharIndex += 1;
+	}
+
+	public void nextEndOfLine()
+	{
+		this.localCharIndex = 0;
+		this.stringIndex += 1;
+	}
+
 	public void setCharIndex(final int charIndex)
 	{
 		this.charIndex = charIndex;
@@ -71,4 +107,5 @@ public class StringListCharPosition
 	{
 		this.stringIndex = stringIndex;
 	}
+
 }

src/fr/devinsy/util/strings/StringListReader.java

@@ -0,0 +1,23 @@
+package fr.devinsy.util.strings;
+
+import java.io.Closeable;
+import java.io.IOException;
+
+/**
+ * 
+ * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
+ * 
+ */
+public interface StringListReader extends Closeable
+{
+	/**
+	 * 
+	 */
+	@Override
+	void close();
+
+	/**
+	 * 
+	 */
+	String readLine() throws IOException;
+}

src/fr/devinsy/util/strings/StringListUtils.java

@@ -18,6 +18,18 @@
  */
 package fr.devinsy.util.strings;
 
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.io.UnsupportedEncodingException;
+import java.net.URL;
 import java.util.Collection;
 
 /**
@@ -28,24 +40,64 @@ import java.util.Collection;
  */
 public class StringListUtils
 {
+	public static final String DEFAULT_CHARSET_NAME = "UTF-8";
+
 	/**
 	 * 
-	 * @param prefix
+	 * @param target
-	 * @param separator
-	 * @param postfix
 	 * @return
 	 */
-	public String toString(final StringList source, final String prefix, final String separator, final String postfix)
+	public StringSet getComplement(final Collection<String> alpha, final Collection<String> bravo)
 	{
-		String result;
+		StringSet result;
 
-		if (source == null)
+		result = getDifference(bravo, alpha);
-		{
+
-			result = prefix + postfix;
+		//
+		return result;
 	}
-		else
+
+	/**
+	 * 
+	 * @param target
+	 * @return
+	 */
+	public StringSet getDifference(final Collection<String> alpha, final Collection<String> bravo)
 	{
-			result = source.toString(prefix, separator, postfix);
+		StringSet result;
+
+		result = new StringSet(alpha);
+		result.removeAll(bravo);
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param target
+	 * @return
+	 */
+	public StringSet getDisjunction(final Collection<String> alpha, final Collection<String> bravo)
+	{
+		StringSet result;
+
+		result = new StringSet();
+
+		for (String string : alpha)
+		{
+			if (!bravo.contains(string))
+			{
+				result.add(string);
+			}
+		}
+
+		for (String string : bravo)
+		{
+			if (!alpha.contains(string))
+			{
+				result.add(string);
+			}
 		}
 
 		//
@@ -53,30 +105,235 @@ public class StringListUtils
 	}
 
 	/**
-	 * Builds a string list concatenating several time one string.
+	 * 
+	 * @param target
+	 * @return
+	 */
+	public StringSet getIntersectionOf(final Collection<String> alpha, final Collection<String> bravo)
+	{
+		StringSet result;
+
+		result = new StringSet();
+
+		for (String string : alpha)
+		{
+			if (bravo.contains(string))
+			{
+				result.add(string);
+			}
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param target
+	 * @return
+	 */
+	public StringSet getUnionOf(final Collection<String> alpha, final Collection<String> bravo)
+	{
+		StringSet result;
+
+		result = new StringSet(alpha);
+
+		for (String string : bravo)
+		{
+			result.add(string);
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * Builds a string concatenating many times a source string.
 	 * 
 	 * @param source
 	 *            The string to concatenate several time.
-	 * @param number
+	 * 
-	 *            The number of times to multiply.
+	 * @param multiplier
+	 *            The number of concatenate to produce.
 	 * @return
 	 */
-	public static String multiply(final String source, final int number)
+	public static String concatenate(final String source, final int multiplier)
 	{
 		String result;
 
-		StringList strings = new StringList(number);
+		result = repeat(source, multiplier).toString();
-		for (int count = 0; count < number; count++)
-		{
-			strings.append(source);
-		}
-
-		result = strings.toString();
 
 		//
 		return result;
 	}
 
+	/**
+	 * 
+	 * @param file
+	 * @throws IOException
+	 */
+	public static StringList load(final File source) throws IOException
+	{
+		StringList result;
+
+		result = load(source, DEFAULT_CHARSET_NAME);
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param file
+	 * @throws IOException
+	 */
+	public static StringList load(final File file, final String charsetName) throws IOException
+	{
+		StringList result;
+
+		//
+		result = new StringList();
+
+		//
+		StringListUtils.read(result, new FileInputStream(file), charsetName);
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param file
+	 * @return
+	 * @throws IOException
+	 */
+	public static StringList load(final URL source) throws IOException
+	{
+		StringList result;
+
+		result = load(source, DEFAULT_CHARSET_NAME);
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param file
+	 * @throws IOException
+	 */
+	public static StringList load(final URL source, final String charsetName) throws IOException
+	{
+		StringList result;
+
+		//
+		result = new StringList();
+
+		//
+		StringListUtils.read(result, source.openStream(), charsetName);
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param file
+	 * @throws IOException
+	 */
+	public static void read(final StringList out, final InputStream is, final String charsetName) throws IOException
+	{
+		BufferedReader in = null;
+		try
+		{
+			in = new BufferedReader(new InputStreamReader(is, charsetName));
+
+			boolean ended = false;
+
+			while (!ended)
+			{
+				String line = in.readLine();
+
+				if (line == null)
+				{
+					ended = true;
+				}
+				else
+				{
+					out.append(line);
+				}
+			}
+		}
+		finally
+		{
+			try
+			{
+				if (in != null)
+				{
+					in.close();
+				}
+			}
+			catch (IOException exception)
+			{
+				exception.printStackTrace();
+			}
+		}
+	}
+
+	/**
+	 * Builds a string list concatenating many times a source string.
+	 * 
+	 * @param source
+	 *            The string to concatenate several time.
+	 * 
+	 * @param multiplier
+	 *            The number of concatenate to produce.
+	 * @return
+	 */
+	public static StringList repeat(final String source, final int multiplier)
+	{
+		StringList result;
+
+		result = new StringList(multiplier);
+		for (int count = 0; count < multiplier; count++)
+		{
+			result.append(source);
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param file
+	 * @throws FileNotFoundException
+	 * @throws UnsupportedEncodingException
+	 */
+	public static void save(final File file, final StringList source) throws UnsupportedEncodingException, FileNotFoundException
+	{
+		PrintWriter out = null;
+		try
+		{
+			out = new PrintWriter(new OutputStreamWriter(new FileOutputStream(file), DEFAULT_CHARSET_NAME));
+
+			if (source != null)
+			{
+				for (String string : source)
+				{
+					out.println(string);
+				}
+			}
+		}
+		finally
+		{
+			if (out != null)
+			{
+				out.close();
+			}
+		}
+	}
+
 	/**
 	 * Sorts the string list.
 	 * 
@@ -116,6 +373,79 @@ public class StringListUtils
 		return result;
 	}
 
+	/**
+	 * 
+	 * @param prefix
+	 * @param separator
+	 * @param postfix
+	 * @return
+	 */
+	public static String toString(final String[] source, final String prefix, final String separator, final String postfix)
+	{
+		String result;
+
+		if (source == null)
+		{
+			result = new StringList().toString(prefix, null, postfix);
+		}
+		else
+		{
+			result = new StringList(source).toString(prefix, separator, postfix);
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param prefix
+	 * @param separator
+	 * @param postfix
+	 * @return
+	 */
+	public static String toString(final StringList source, final String prefix, final String separator, final String postfix)
+	{
+		String result;
+
+		if (source == null)
+		{
+			result = new StringList().toString(prefix, null, postfix);
+		}
+		else
+		{
+			result = source.toString(prefix, separator, postfix);
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * Converts a {@code Collection<String>} to an array of {@code String}.
+	 * 
+	 * @param source
+	 *            The string list to convert.
+	 * 
+	 * @return The result of the conversion.
+	 */
+	public static String[] toStringArray(final Collection<String> source)
+	{
+		String[] result;
+
+		if (source == null)
+		{
+			result = new String[0];
+		}
+		else
+		{
+			result = new StringList(source).toStringArray();
+		}
+
+		//
+		return result;
+	}
+
 	/**
 	 * Converts a {@code StringList} to an array of {@code String}.
 	 * 
@@ -150,11 +480,11 @@ public class StringListUtils
 	 * @return If argument is null then returns an empty string, otherwise
 	 *         returns a string concatenation of the argument.
 	 */
-	public static String toStringNotNull(final String[] strings)
+	public static String toStringNotNull(final String[] source)
 	{
 		String result;
 
-		result = toString(strings);
+		result = toString(source);
 
 		if (result == null)
 		{
@@ -170,23 +500,17 @@ public class StringListUtils
 	 * @param strings
 	 * @return
 	 */
-	public static String toStringWithBracket(final Collection<String> strings)
+	public static String toStringWithBracket(final Collection<String> source)
 	{
 		String result;
 
-		if (strings == null)
+		if (source == null)
 		{
 			result = null;
 		}
 		else
 		{
-			StringList buffer = new StringList();
+			result = new StringList(source).toStringWithBracket();
-
-			buffer.append("[");
-			buffer.append(toStringWithCommas(strings));
-			buffer.append("]");
-
-			result = buffer.toString();
 		}
 
 		//
@@ -198,23 +522,17 @@ public class StringListUtils
 	 * @param strings
 	 * @return
 	 */
-	public static String toStringWithBracket(final String[] strings)
+	public static String toStringWithBracket(final String[] source)
 	{
 		String result;
 
-		if (strings == null)
+		if (source == null)
 		{
 			result = null;
 		}
 		else
 		{
-			StringList merge = new StringList();
+			result = new StringList(source).toStringWithBracket();
-
-			merge.append("[");
-			merge.append(toStringWithCommas(strings));
-			merge.append("]");
-
-			result = merge.toString();
 		}
 
 		//
@@ -226,11 +544,33 @@ public class StringListUtils
 	 * @param strings
 	 * @return
 	 */
-	public static String toStringWithBracketNotNull(final Collection<String> strings)
+	public static String toStringWithBracket(final StringList source)
 	{
 		String result;
 
-		result = toStringWithBrackets(strings);
+		if (source == null)
+		{
+			result = null;
+		}
+		else
+		{
+			result = source.toStringWithBracket();
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param strings
+	 * @return
+	 */
+	public static String toStringWithBracketNotNull(final Collection<String> source)
+	{
+		String result;
+
+		result = toStringWithBracket(source);
 
 		if (result == null)
 		{
@@ -246,11 +586,31 @@ public class StringListUtils
 	 * @param strings
 	 * @return
 	 */
-	public static String toStringWithBracketNotNull(final String[] strings)
+	public static String toStringWithBracketNotNull(final String[] source)
 	{
 		String result;
 
-		result = toStringWithBrackets(strings);
+		result = toStringWithBracket(source);
+
+		if (result == null)
+		{
+			result = "";
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param strings
+	 * @return
+	 */
+	public static String toStringWithBracketNotNull(final StringList source)
+	{
+		String result;
+
+		result = toStringWithBracket(source);
 
 		if (result == null)
 		{
@@ -276,14 +636,7 @@ public class StringListUtils
 		}
 		else
 		{
-			StringList buffer = new StringList();
+			result = new StringList(source).toStringWithBrackets();
-
-			for (String string : source)
-			{
-				buffer.append("[").append(string).append("]");
-			}
-
-			result = buffer.toString();
 		}
 
 		//
@@ -305,14 +658,29 @@ public class StringListUtils
 		}
 		else
 		{
-			StringList merge = new StringList();
+			result = new StringList(source).toStringWithBrackets();
-
-			for (String string : source)
-			{
-				merge.append("[").append(string).append("]");
 		}
 
-			result = merge.toString();
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param source
+	 * @return
+	 */
+	public static String toStringWithBrackets(final StringList source)
+	{
+		String result;
+
+		if (source == null)
+		{
+			result = null;
+		}
+		else
+		{
+			result = source.toStringWithBrackets();
 		}
 
 		//
@@ -334,7 +702,7 @@ public class StringListUtils
 		}
 		else
 		{
-			result = new StringList(source).toStringSeparatedBy(",");
+			result = new StringList(source).toStringWithCommas();
 		}
 
 		//
@@ -356,7 +724,29 @@ public class StringListUtils
 		}
 		else
 		{
-			result = new StringList(source).toStringSeparatedBy(",");
+			result = new StringList(source).toStringWithCommas();
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param source
+	 * @return
+	 */
+	public static String toStringWithCommas(final StringList source)
+	{
+		String result;
+
+		if (source == null)
+		{
+			result = null;
+		}
+		else
+		{
+			result = source.toStringWithCommas();
 		}
 
 		//
@@ -378,7 +768,7 @@ public class StringListUtils
 		}
 		else
 		{
-			result = new StringList(source).toStringSeparatedBy(", ");
+			result = new StringList(source).toStringWithFrenchCommas();
 		}
 
 		//
@@ -400,7 +790,29 @@ public class StringListUtils
 		}
 		else
 		{
-			result = new StringList(source).toStringSeparatedBy(", ");
+			result = new StringList(source).toStringWithFrenchCommas();
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * 
+	 * @param source
+	 * @return
+	 */
+	public static String toStringWithFrenchCommas(final StringList source)
+	{
+		String result;
+
+		if (source == null)
+		{
+			result = null;
+		}
+		else
+		{
+			result = source.toStringWithFrenchCommas();
 		}
 
 		//

src/fr/devinsy/util/strings/StringSet.java

@@ -18,6 +18,7 @@
  */
 package fr.devinsy.util.strings;
 
+import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
 
@@ -38,6 +39,26 @@ public class StringSet extends HashSet<String>
 		super();
 	}
 
+	/**
+	 * Constructs a list of string of the specified collection, in the order
+	 * they are returned by the collection's iterator.
+	 * 
+	 * @param source
+	 */
+	public StringSet(final Collection<String> source)
+	{
+		super(source.size());
+
+		if (source != null)
+		{
+			//
+			for (String string : source)
+			{
+				this.add(string);
+			}
+		}
+	}
+
 	/**
 	 *
 	 */
@@ -46,23 +67,6 @@ public class StringSet extends HashSet<String>
 		super(initialCapacity);
 	}
 
-	/**
-	 *
-	 */
-	public StringSet(final List<String> source)
-	{
-		super();
-
-		if (source != null)
-		{
-			//
-			for (String string : source)
-			{
-				this.add(string);
-			}
-		}
-	}
-
 	/**
 	 *
 	 */
@@ -80,23 +84,6 @@ public class StringSet extends HashSet<String>
 		}
 	}
 
-	/**
-	 *
-	 */
-	public StringSet(final StringList source)
-	{
-		super();
-
-		if (source != null)
-		{
-			//
-			for (String string : source)
-			{
-				this.add(string);
-			}
-		}
-	}
-
 	/**
 	 *
 	 */

test/fr/devinsy/util/StringListTest.java

@@ -18,6 +18,8 @@
  */
 package fr.devinsy.util;
 
+import java.util.Iterator;
+
 import org.apache.log4j.BasicConfigurator;
 import org.apache.log4j.Level;
 import org.apache.log4j.Logger;
@@ -26,6 +28,8 @@ import org.junit.Before;
 import org.junit.Test;
 
 import fr.devinsy.util.strings.StringList;
+import fr.devinsy.util.strings.StringListCharIterator;
+import fr.devinsy.util.strings.StringListCharPosition;
 
 /**
  * 
@@ -210,6 +214,42 @@ public class StringListTest
 
 	/**
      * 
+     */
+	@Test
+	public void testIteratorOfChar01()
+	{
+		//
+		logger.debug("===== test starting...");
+
+		//
+		StringList source = new StringList();
+		source.append("abc");
+		source.append("def");
+		source.append("ghi");
+		source.append("jkl");
+		source.append("mno");
+
+		//
+		Iterator<Character> iterator = source.iteratorOfChar();
+
+		for (int index = 0; index < source.length(); index++)
+		{
+			StringListCharPosition position = ((StringListCharIterator) iterator).nextPosition();
+			System.out.println(index + ":" + source.charAt(index) + " " + position.getCharIndex() + " " + position.getStringIndex() + " " + position.getLocalCharIndex());
+
+			Assert.assertTrue(iterator.hasNext());
+
+			Character character = ((StringListCharIterator) iterator).next();
+
+			Assert.assertEquals(character, new Character(source.charAt(index)));
+		}
+
+		//
+		logger.debug("===== test done.");
+	}
+
+	/**
+     * 
 	 */
 	@Test
 	public void testSubstring01()