/*
    * Licensed under the GPL License. You may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *   https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
    *
    * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
    * WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
    * PURPOSE.
   */
  package psiprobe.jsp;
  
  import java.io.IOException;
  
  import javax.servlet.jsp.JspException;
  import javax.servlet.jsp.tagext.TagSupport;
  
  import psiprobe.tools.SizeExpression;
  
  /**
   * JSP tag to convert size from bytes into human readable form: KB, MB, GB or TB depending on how
   * large the value in bytes is.
   */
  public class VolumeTag extends TagSupport {
  
    /** The Constant serialVersionUID. */
    private static final long serialVersionUID = 1L;
  
    /** The value. */
    private long value;
  
    /** The fractions. */
    private int fractions;
  
    /**
     * Sets the value.
     *
     * @param value the new value
     */
    public void setValue(long value) {
      this.value = value;
    }
  
    /**
     * Gets the fractions.
     *
     * @return the fractions
     */
    public int getFractions() {
      return fractions;
    }
  
    /**
     * Sets the fractions.
     *
     * @param fractions the new fractions
     */
    public void setFractions(int fractions) {
      this.fractions = fractions;
    }
  
    @Override
    public int doStartTag() throws JspException {
      String title = Long.toString(value);
      String newValue = SizeExpression.format(value, fractions, true);
      try {
        pageContext.getOut().write("<span title=\"" + title + "\">" + newValue + "</span>");
      } catch (IOException e) {
        throw new JspException("Exception writing value to JspWriter", e);
      }
  
      return EVAL_BODY_INCLUDE;
    }
  
  }