+/*
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
+ *
+ * This file is part of Jalview.
+ *
+ * Jalview is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ *
+ * Jalview 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Jalview. If not, see <http://www.gnu.org/licenses/>.
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
+ */
package jalview.util;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
-
public class StringUtils
{
- private static final Pattern DELIMITERS_PATTERN = Pattern.compile(".*='[^']*(?!')");
+ private static final Pattern DELIMITERS_PATTERN = Pattern
+ .compile(".*='[^']*(?!')");
private static final boolean DEBUG = false;
* the character to insert
*/
public static final char[] insertCharAt(char[] in, int position,
- int count,
- char ch)
+ int count, char ch)
{
char[] tmp = new char[in.length + count];
-
+
if (position >= in.length)
{
System.arraycopy(in, 0, tmp, 0, in.length);
{
System.arraycopy(in, 0, tmp, 0, position);
}
-
+
int index = position;
while (count > 0)
{
tmp[index++] = ch;
count--;
}
-
+
if (position < in.length)
{
- System.arraycopy(in, position, tmp, index,
- in.length - position);
+ System.arraycopy(in, position, tmp, index, in.length - position);
}
-
+
return tmp;
}
*/
public static final char[] deleteChars(char[] in, int from, int to)
{
- if (from >= in.length)
+ if (from >= in.length || from < 0)
{
return in;
}
}
return "" + separator;
}
+
+ /**
+ * Converts a list to a string with a delimiter before each term except the
+ * first. Returns an empty string given a null or zero-length argument. This
+ * can be replaced with StringJoiner in Java 8.
+ *
+ * @param terms
+ * @param delim
+ * @return
+ */
+ public static String listToDelimitedString(List<String> terms,
+ String delim)
+ {
+ StringBuilder sb = new StringBuilder(32);
+ if (terms != null && !terms.isEmpty())
+ {
+ boolean appended = false;
+ for (String term : terms)
+ {
+ if (appended)
+ {
+ sb.append(delim);
+ }
+ appended = true;
+ sb.append(term);
+ }
+ }
+ return sb.toString();
+ }
+
+ /**
+ * Convenience method to parse a string to an integer, returning 0 if the
+ * input is null or not a valid integer
+ *
+ * @param s
+ * @return
+ */
+ public static int parseInt(String s)
+ {
+ int result = 0;
+ if (s != null && s.length() > 0)
+ {
+ try
+ {
+ result = Integer.parseInt(s);
+ } catch (NumberFormatException ex)
+ {
+ }
+ }
+ return result;
+ }
}