archive/net.sourceforge.phpeclipse.quantum.sql/src/com/quantum/util/StringUtil.java

   1 /* Created on Jan 19, 2004 */
   2 package com.quantum.util;
   3
   4 import java.util.Arrays;
   5
   6 /**
   7  * @author holmesbc
   8  */
   9 public class StringUtil {
  10
  11         public static String substituteString(String original, String placeHolder, String replacementValue) {
  12                 StringBuffer buffer = new StringBuffer();
  13                 char[] originalChars = original == null ? new char[0] : original.toCharArray();
  14                 char[] placeHolderChars = placeHolder.toCharArray();
  15                 char[] placeHolderComparisonArray = new char[placeHolderChars.length];
  16
  17                 for (int i = 0, length = originalChars.length; i < length; i++) {
  18                         if (i <= length - placeHolderChars.length) {
  19                                 System.arraycopy(originalChars, i, placeHolderComparisonArray, 0, placeHolderComparisonArray.length);
  20                                 if (Arrays.equals(placeHolderComparisonArray, placeHolderChars)) {
  21                                         i += placeHolderComparisonArray.length - 1;
  22                                         buffer.append(replacementValue);
  23                                 } else {
  24                                         buffer.append(originalChars[i]);
  25                                 }
  26                         } else {
  27                                 buffer.append(originalChars[i]);
  28                         }
  29                 }
  30
  31                 return original == null ? null : buffer.toString();
  32         }
  33 }