org.apache.camel.tools.apt.helper.Strings Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.camel.tools.apt.helper;
/**
* Some String helper methods
*/
public final class Strings {
private Strings() {
//Helper class
}
/**
* Returns true if the given text is null or empty string or has null as the value
*/
public static boolean isNullOrEmpty(String text) {
return text == null || text.length() == 0 || "null".equals(text);
}
public static String safeNull(String text) {
if (isNullOrEmpty(text)) {
return "";
} else {
return text;
}
}
/**
* Returns the value or the defaultValue if it is null
*/
public static String getOrElse(String text, String defaultValue) {
return (text != null) ? text : defaultValue;
}
/**
* Returns the string after the given token
*
* @param text the text
* @param after the token
* @return the text after the token, or null if text does not contain the token
*/
public static String after(String text, String after) {
if (!text.contains(after)) {
return null;
}
return text.substring(text.indexOf(after) + after.length());
}
/**
* Returns the canonical class name by removing any generic type information.
*/
public static String canonicalClassName(String className) {
// remove generics
int pos = className.indexOf('<');
if (pos != -1) {
return className.substring(0, pos);
} else {
return className;
}
}
/**
* Returns the text wrapped double quotes
*/
public static String doubleQuote(String text) {
return quote(text, "\"");
}
/**
* Returns the text wrapped single quotes
*/
public static String singleQuote(String text) {
return quote(text, "'");
}
/**
* Wraps the text in the given quote text
*
* @param text the text to wrap in quotes
* @param quote the quote text added to the prefix and postfix of the text
*
* @return the text wrapped in the given quotes
*/
public static String quote(String text, String quote) {
return quote + text + quote;
}
/**
* Clips the text between the start and end markers
*/
public static String between(String text, String start, String end) {
int pos = text.indexOf(start);
if (pos > 0) {
text = text.substring(pos + 1);
}
int pos2 = text.lastIndexOf(end);
if (pos2 > 0) {
text = text.substring(0, pos2);
}
return text;
}
/**
* Capitalizes the name as a title
*
* @param name the name
* @return as a title
*/
public static String asTitle(String name) {
StringBuilder sb = new StringBuilder();
for (char c : name.toCharArray()) {
boolean upper = Character.isUpperCase(c);
boolean first = sb.length() == 0;
if (first) {
sb.append(Character.toUpperCase(c));
} else if (upper) {
char prev = sb.charAt(sb.length() - 1);
if (!Character.isUpperCase(prev)) {
// append space if previous is not upper
sb.append(' ');
}
sb.append(c);
} else {
sb.append(Character.toLowerCase(c));
}
}
return sb.toString().trim();
}
}