/*******************************************************************************
* Copyright (c) 2008, 2015 Angelo Zerr and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
*******************************************************************************/
package org.eclipse.e4.ui.css.core.utils;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
/**
* Helper for String.
*/
public class StringUtils {
/**
* Replace <b>oldString</b> occurrences with <b>newString</b> occurrences of
* the String <b>line</b> and return the result.
*
* @param line
* @param oldString
* @param newString
* @return
*/
public static final String replace(String line, String oldString,
String newString) {
int i = 0;
if ((i = line.indexOf(oldString, i)) >= 0) {
char line2[] = line.toCharArray();
char newString2[] = newString.toCharArray();
int oLength = oldString.length();
StringBuffer buf = new StringBuffer(line2.length);
buf.append(line2, 0, i).append(newString2);
i += oLength;
int j;
for (j = i; (i = line.indexOf(oldString, i)) > 0; j = i) {
buf.append(line2, j, i - j).append(newString2);
i += oLength;
}
buf.append(line2, j, line2.length - j);
return buf.toString();
} else {
return line;
}
}
/**
* Split String <b>line</b> with delimiter <b>delim</b> and return result
* inti array of String.
*
* @param line
* @param delim
* @return
*/
public static String[] split(String line, String delim) {
List<String> list = new ArrayList<>();
for (StringTokenizer t = new StringTokenizer(line, delim); t.hasMoreTokens(); list.add(t.nextToken())) {
;
}
return list.toArray(new String[list.size()]);
}
/**
* Return true if String value is null or empty.
*
* @param value
* @return
*/
public static boolean isEmpty(String value) {
return (value == null || value.length() < 1);
}
// Capitalizing
// -----------------------------------------------------------------------
/**
* <p>
* Capitalizes all the whitespace separated words in a String. Only the
* first letter of each word is changed. To convert the rest of each word to
* lowercase at the same time, use {@link #capitalizeFully(String)}.
* </p>
*
* <p>
* Whitespace is defined by {@link Character#isWhitespace(char)}. A
* <code>null</code> input String returns <code>null</code>.
* Capitalization uses the unicode title case, normally equivalent to upper
* case.
* </p>
*
* <pre>
* WordUtils.capitalize(null) = null
* WordUtils.capitalize("") = ""
* WordUtils.capitalize("i am FINE") = "I Am FINE"
* </pre>
*
* @param str
* the String to capitalize, may be null
* @return capitalized String, <code>null</code> if null String input
* @see #uncapitalize(String)
* @see #capitalizeFully(String)
*/
public static String capitalize(String str) {
return capitalize(str, null);
}
/**
* <p>
* Capitalizes all the delimiter separated words in a String. Only the first
* letter of each word is changed. To convert the rest of each word to
* lowercase at the same time, use {@link #capitalizeFully(String, char[])}.
* </p>
*
* <p>
* The delimiters represent a set of characters understood to separate
* words. The first string character and the first non-delimiter character
* after a delimiter will be capitalized.
* </p>
*
* <p>
* A <code>null</code> input String returns <code>null</code>.
* Capitalization uses the unicode title case, normally equivalent to upper
* case.
* </p>
*
* <pre>
* WordUtils.capitalize(null, *) = null
* WordUtils.capitalize("", *) = ""
* WordUtils.capitalize(*, new char[0]) = *
* WordUtils.capitalize("i am fine", null) = "I Am Fine"
* WordUtils.capitalize("i aM.fine", {'.'}) = "I aM.Fine"
* </pre>
*
* @param str
* the String to capitalize, may be null
* @param delimiters
* set of characters to determine capitalization, null means
* whitespace
* @return capitalized String, <code>null</code> if null String input
* @see #uncapitalize(String)
* @see #capitalizeFully(String)
* @since 2.1
*/
public static String capitalize(String str, char[] delimiters) {
int delimLen = (delimiters == null ? -1 : delimiters.length);
if (str == null || str.length() == 0 || delimLen == 0) {
return str;
}
int strLen = str.length();
StringBuffer buffer = new StringBuffer(strLen);
boolean capitalizeNext = true;
for (int i = 0; i < strLen; i++) {
char ch = str.charAt(i);
if (isDelimiter(ch, delimiters)) {
buffer.append(ch);
capitalizeNext = true;
} else if (capitalizeNext) {
buffer.append(Character.toTitleCase(ch));
capitalizeNext = false;
} else {
buffer.append(ch);
}
}
return buffer.toString();
}
/**
* Is the character a delimiter.
*
* @param ch
* the character to check
* @param delimiters
* the delimiters
* @return true if it is a delimiter
*/
private static boolean isDelimiter(char ch, char[] delimiters) {
if (delimiters == null) {
return Character.isWhitespace(ch);
}
for (char delimiter : delimiters) {
if (ch == delimiter) {
return true;
}
}
return false;
}
}