109 lines
3.9 KiB
Java
109 lines
3.9 KiB
Java
/*
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* The Broad Institute
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* SOFTWARE COPYRIGHT NOTICE AGREEMENT
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* This software and its documentation are copyright 2009 by the
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* Broad Institute/Massachusetts Institute of Technology. All rights are reserved.
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*
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* This software is supplied without any warranty or guaranteed support whatsoever. Neither
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* the Broad Institute nor MIT can be responsible for its use, misuse, or functionality.
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*/
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package edu.mit.broad.picard.util;
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/**
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* Utilities that are useful when dealing with Strings.
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*
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* @author Tim Fennell
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*/
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public class StringUtil {
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/**
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* Return input string with newlines inserted to ensure that all lines
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* have length <= maxLineLength. if a word is too long, it is simply broken
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* at maxLineLength. Does not handle tabs intelligently (due to implementer laziness).
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*/
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public static String wordWrap(String s, int maxLineLength) {
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String[] lines = s.split("\n");
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StringBuilder sb = new StringBuilder();
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for (String line: lines) {
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if (sb.length() > 0) {
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sb.append("\n");
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}
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sb.append(wordWrapSingleLine(line, maxLineLength));
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}
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if (s.endsWith("\n")) {
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sb.append("\n");
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}
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return sb.toString();
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}
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public static String wordWrapSingleLine(String s, int maxLineLength) {
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if (s.length() <= maxLineLength) {
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return s;
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}
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StringBuilder sb = new StringBuilder();
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int startCopyFrom = 0;
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while (startCopyFrom < s.length()) {
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int lastSpaceIndex = startCopyFrom;
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int i;
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// Find break point (if it exists)
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for (i = startCopyFrom; i < s.length() && i - startCopyFrom < maxLineLength; ++i) {
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if (Character.isWhitespace(s.charAt(i))) {
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lastSpaceIndex = i;
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}
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}
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if (i - startCopyFrom < maxLineLength) {
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lastSpaceIndex = i;
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}
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// Include any trailing whitespace
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for (; lastSpaceIndex < s.length() && Character.isWhitespace(s.charAt(lastSpaceIndex)); ++lastSpaceIndex) {}
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if (sb.length() > 0) {
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sb.append("\n");
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}
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// Handle situation in which there is no word break. Just break the word in the middle.
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if (lastSpaceIndex == startCopyFrom) {
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lastSpaceIndex = i;
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}
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sb.append(s.substring(startCopyFrom, lastSpaceIndex));
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startCopyFrom = lastSpaceIndex;
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}
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return sb.toString();
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}
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/**
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*
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* @param separator String to interject between each string in strings arg
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* @param strings List of strings to be joined.
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* @return String that concatenates each item of strings arg, with separator btw each of them.
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*/
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public static String join(String separator, String... strings) {
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if (strings.length == 0) {
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return "";
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}
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StringBuilder ret = new StringBuilder(strings[0]);
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for (int i = 1; i < strings.length; ++i) {
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ret.append(separator);
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ret.append(strings[i]);
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}
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return ret.toString();
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}
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/**
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* Checks that a String doesn't contain one or more characters of interest.
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*
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* @param s the String to check
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* @param chars the characters to check for
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* @return String the input String for convenience
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* @throws IllegalArgumentException if the String contains one or more of the characters
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*/
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public static String assertCharactersNotInString(final String s, final char... chars) {
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for (char ch : s.toCharArray()) {
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for (int i=0; i<chars.length; ++i) {
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if (ch == chars[i]) {
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throw new IllegalArgumentException("Supplied String contains illegal character '" + chars[i] + "'.");
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}
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}
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}
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return s;
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}
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}
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