X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Futil%2FStringUtils.java;h=6044655b80c327eb3a237d82d72a6e46156284da;hb=5585b4b0ed1f5dd85887ed6b76352947ce1be133;hp=3e004a6f74257f066c883023a115a12e49ab39d4;hpb=4d7f98a6dd54d9863ba449ec79dcd95d25ed863d;p=jalview.git
diff --git a/src/jalview/util/StringUtils.java b/src/jalview/util/StringUtils.java
index 3e004a6..6044655 100644
--- a/src/jalview/util/StringUtils.java
+++ b/src/jalview/util/StringUtils.java
@@ -1,3 +1,23 @@
+/*
+ * 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 .
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
+ */
package jalview.util;
import java.util.ArrayList;
@@ -228,4 +248,55 @@ public class StringUtils
}
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 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;
+ }
}