src/main/java/org/apache/log4j/filter/ExpressionFilter.java [81:128]:
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    boolean convertInFixToPostFix = true;
    /**
     * Expression.
     */
    String expression;
    /**
     * Evaluated rule.
     */
    Rule expressionRule;

    /**
     * {@inheritDoc}
     */
    public void activateOptions() {
        expressionRule =
                ExpressionRule.getRule(expression, !convertInFixToPostFix);
    }

    /**
     * Set exp.
     * @param exp exp.
     */
    public void setExpression(final String exp) {
        this.expression = exp;
    }

    /**
     * Get expression.
     * @return expression.
     */
    public String getExpression() {
        return expression;
    }

    /**
     * Set convert in-fix to post-fix.
     * @param newValue new value.
     */
    public void setConvertInFixToPostFix(final boolean newValue) {
        this.convertInFixToPostFix = newValue;
    }

    /**
     * Get in-fix to post-fix conversion setting.
     * @return true if in-fix expressions are converted to post-fix.
     */
    public boolean getConvertInFixToPostFix() {
        return convertInFixToPostFix;
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src/main/java/org/apache/log4j/filter/LocationInfoFilter.java [45:92]:
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  boolean convertInFixToPostFix = true;
    /**
     * Expression.
     */
  String expression;
    /**
     * Compiled expression.
     */
  Rule expressionRule;

    /**
     * {@inheritDoc}
     */
  public void activateOptions() {
    expressionRule =
      ExpressionRule.getRule(expression, !convertInFixToPostFix);
  }

    /**
     * Set expression.
     * @param exp expression.
     */
  public void setExpression(final String exp) {
    this.expression = exp;
  }

    /**
     * Get expression.
     * @return expression.
     */
  public String getExpression() {
    return expression;
  }

    /**
     * Set whether in-fix expressions should be converted to post-fix.
     * @param newValue if true, convert/
     */
  public void setConvertInFixToPostFix(final boolean newValue) {
    this.convertInFixToPostFix = newValue;
  }

    /**
     * Set whether in-fix expressions should be converted to post-fix.
     * @return if true, expressions are converted.
     */
  public boolean getConvertInFixToPostFix() {
    return convertInFixToPostFix;
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