More file moving.

src/main/java/com/sk89q/util/StringUtil.java

@@ -0,0 +1,166 @@
+// $Id$
+/*
+ * Copyright (C) 2010 sk89q <http://www.sk89q.com>
+ *
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.util;
+
+import java.util.Collection;
+
+/**
+ * String utilities.
+ * 
+ * @author sk89q
+ */
+public class StringUtil {
+    /**
+     * Trim a string if it is longer than a certain length.
+     *  
+     * @param str
+     * @param len
+     * @return
+     */
+    public static String trimLength(String str, int len) {
+        if (str.length() > len) {
+            return str.substring(0, len);
+        }
+        
+        return str;
+    }
+
+    /**
+     * Join an array of strings into a string.
+     * 
+     * @param str
+     * @param delimiter
+     * @param initialIndex
+     * @return
+     */
+    public static String joinString(String[] str, String delimiter,
+            int initialIndex) {
+        if (str.length == 0) {
+            return "";
+        }
+        StringBuilder buffer = new StringBuilder(str[initialIndex]);
+        for (int i = initialIndex + 1; i < str.length; i++) {
+            buffer.append(delimiter).append(str[i]);
+        }
+        return buffer.toString();
+    }
+
+    /**
+     * Join an array of strings into a string.
+     * 
+     * @param str
+     * @param delimiter
+     * @param initialIndex
+     * @param quote 
+     * @return
+     */
+    public static String joinQuotedString(String[] str, String delimiter,
+            int initialIndex, String quote) {
+        if (str.length == 0) {
+            return "";
+        }
+        StringBuilder buffer = new StringBuilder();
+        buffer.append(quote);
+        buffer.append(str[initialIndex]);
+        buffer.append(quote);
+        for (int i = initialIndex + 1; i < str.length; i++) {
+            buffer.append(delimiter).append(quote).append(str[i]).append(quote);
+        }
+        return buffer.toString();
+    }
+
+    /**
+     * Join an array of strings into a string.
+     * 
+     * @param str
+     * @param delimiter
+     * @return
+     */
+    public static String joinString(String[] str, String delimiter) {
+        return joinString(str, delimiter, 0);
+    }
+
+    /**
+     * Join an array of strings into a string.
+     * 
+     * @param str
+     * @param delimiter
+     * @param initialIndex
+     * @return
+     */
+    public static String joinString(Object[] str, String delimiter,
+            int initialIndex) {
+        if (str.length == 0) {
+            return "";
+        }
+        StringBuilder buffer = new StringBuilder(str[initialIndex].toString());
+        for (int i = initialIndex + 1; i < str.length; i++) {
+            buffer.append(delimiter).append(str[i].toString());
+        }
+        return buffer.toString();
+    }
+
+    /**
+     * Join an array of strings into a string.
+     * 
+     * @param str
+     * @param delimiter
+     * @param initialIndex
+     * @return
+     */
+    public static String joinString(int[] str, String delimiter,
+            int initialIndex) {
+        if (str.length == 0) {
+            return "";
+        }
+        StringBuilder buffer = new StringBuilder(Integer.toString(str[initialIndex]));
+        for (int i = initialIndex + 1; i < str.length; i++) {
+            buffer.append(delimiter).append(Integer.toString(str[i]));
+        }
+        return buffer.toString();
+    }
+
+    /**
+     * Join an list of strings into a string.
+     * 
+     * @param str
+     * @param delimiter
+     * @param initialIndex
+     * @return
+     */
+    public static String joinString(Collection<?> str, String delimiter,
+            int initialIndex) {
+        if (str.size() == 0) {
+            return "";
+        }
+        StringBuilder buffer = new StringBuilder();
+        int i = 0;
+        for (Object o : str) {
+            if (i >= initialIndex) {
+                if (i > 0) {
+                    buffer.append(delimiter);
+                }
+                
+                buffer.append(o.toString());
+            }
+            i++;
+        }
+        return buffer.toString();
+    }
+}