/*
* Copyright (c) 2012, grossmann
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the jo-widgets.org nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
package org.jowidgets.util;
import java.util.Arrays;
import java.util.Collection;
public final class StringUtils {
private StringUtils() {}
public static String concatElementsSeparatedBy(final Object[] strings, final char separator) {
Assert.paramNotNull(strings, "strings");
return concatElementsSeparatedBy(Arrays.asList(strings), separator);
}
public static String concatElementsSeparatedBy(final Collection<?> strings, final char separator) {
return concatElementsSeparatedBy(strings, separator + " ");
}
public static String concatElementsSeparatedByComma(final Collection<?> strings) {
return concatElementsSeparatedBy(strings, ',');
}
public static String concatElementsSeparatedBy(final Collection<?> strings, final String separator) {
return concatElementsSeparatedBy(strings, separator, true);
}
public static String concatElementsSeparatedBy(
final Collection<?> strings,
final String separator,
final boolean excludeEmptyValues) {
Assert.paramNotNull(strings, "strings");
return concat(separator, excludeEmptyValues, strings.toArray());
}
/**
* Concats the given objects with the separator to a new string.
*
* Empty values will be excluded.
*
* @param separator The separator to use
* @param objects The objects to concat, the toString() method will be used to get the string for the objects
*
* @return A new String with the concated elements
*/
public static String concat(final String separator, final Object... objects) {
return concat(separator, true, objects);
}
public static String concat(final String separator, final Iterable<?> objects) {
return concat(separator, true, objects);
}
public static String concat(final String separator, final boolean excludeEmptyValues, final Object... objects) {
return concat(separator, excludeEmptyValues, Arrays.asList(objects));
}
/**
* Concats the given objects with the separator to a new string
*
* @param separator The separator to use
* @param excludeEmptyValues If true, empty values will be excluded, otherwise empty values will be replaced by EmptyString
* @param objects The objects to concat, the toString() method will be used to get the string for the objects
*
* @return A new String with the concated elements
*/
public static String concat(final String separator, final boolean excludeEmptyValues, final Iterable<?> objects) {
Assert.paramNotNull(separator, "separator");
Assert.paramNotNull(objects, "objects");
final StringBuilder result = new StringBuilder();
int added = 0;
for (final Object label : objects) {
if (!EmptyCheck.isEmpty(label)) {
result.append(label.toString() + separator);
added++;
}
else if (!excludeEmptyValues) {
result.append("" + separator);
}
}
if (added > 0) {
result.replace(result.length() - separator.length(), result.length(), "");
}
return result.toString();
}
public static String truncateToLength(final String string, final int length) {
Assert.paramInBounds(Integer.MAX_VALUE, length, "length");
if (EmptyCheck.isEmpty(string)) {
return string;
}
if (string.length() <= length) {
return string;
}
else {
return string.substring(0, length - 4) + " ...";
}
}
/**
* Counts how often the char 'toFind' is contained in the string 'toSearchIn'
*
* @param toSearchIn The string to search in
* @param toFind The string to find
*
* @return The number of matches between 0 and toSearchIn.length
*/
public static int countMatches(final String toSearchIn, final char toFind) {
return countMatches(toSearchIn, String.valueOf(toFind));
}
/**
* Counts how often the string 'toFind' is contained in the string 'toSearchIn'
*
* @param toSearchIn The string to search in
* @param toFind The string to find
*
* @return The number of matches between 0 and toSearchIn.length
*/
public static int countMatches(final String toSearchIn, final String toFind) {
if (EmptyCheck.isEmpty(toSearchIn) || EmptyCheck.isEmpty(toFind)) {
return 0;
}
final int stringToFindLength = toFind.length();
int result = 0;
int index = 0;
while ((index = toSearchIn.indexOf(toFind, index)) != -1) {
result++;
index = index + stringToFindLength;
}
return result;
}
public static String loop(final String tanga, final int count) {
if (tanga == null) {
return null;
}
else if (tanga.isEmpty()) {
return tanga;
}
else {
final StringBuilder result = new StringBuilder();
for (int i = 0; i < count; i++) {
result.append(tanga);
}
return result.toString();
}
}
}