src/org/objectweb/cjdbc/controller/backend/rewriting/ReplaceAllRewritingRule.java

説明を見る。

package org.objectweb.cjdbc.controller.backend.rewriting;

public class ReplaceAllRewritingRule extends AbstractRewritingRule
{

  public String rewrite(String sqlQuery)
  {
    // Check first if it is a match
    int start;
    if (isCaseSensitive)
      start = sqlQuery.indexOf(queryPattern);
    else
      start = sqlQuery.toLowerCase().indexOf(queryPattern);
    if (start == -1)
    { // No match
      hasMatched = false;
      return sqlQuery;
    }
    // Match, rewrite the query
    hasMatched = true;

    return replace(sqlQuery, queryPattern, rewrite);
  }

  public ReplaceAllRewritingRule(String queryPattern, String rewrite,
      boolean caseSensitive, boolean stopOnMatch)
  {
    super(queryPattern, rewrite, caseSensitive, stopOnMatch);
  }

  private static String replace(String s, String oldText, String newText)
  {
    final int oldLength = oldText.length();
    final int newLength = newText.length();

    if (oldLength == 0)
      throw new IllegalArgumentException("cannot replace the empty string");

    if (oldText.equals(newText))
      return s;

    int i = 0;
    int x = 0;

    StringBuffer sb = new StringBuffer(s);

    while ((i = sb.indexOf(oldText, x)) > -1)
    {
      sb.delete(i, i + oldLength);
      sb.insert(i, newText);
      x = i + newLength;
    }

    return sb.toString();
  }
}

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