NotSerializableTag.java :  » Profiler » MessAdmin » clime » messadmin » taglib » Java Open Source

package clime.messadmin.taglib;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.BodyTagSupport;
import javax.servlet.jsp.tagext.TryCatchFinally;

import clime.messadmin.providers.spi.SerializableProvider;

/**
 * JSP Tag <code>serializable</code>, used to get the serializable state of an object.
 * 
 * @author C&eacute;drik LIME
 */

public class NotSerializableTag extends BodyTagSupport implements TryCatchFinally {
  protected Object object;

  /**
   * Print the requested object size.
   * 
   * @return EVAL_PAGE
   */
  public final int doStartTag() throws JspException {
    if (object == null && id != null && !"".equals(id.trim())) {//$NON-NLS-1$
      object = pageContext.findAttribute(id);
    }
    boolean serializable;
    try {
      serializable = ! SerializableProvider.Util.isSerializable(object, null);
    } catch (RuntimeException rte) {
      serializable = false;
    }
    return serializable ? EVAL_BODY_INCLUDE : SKIP_BODY;
  }

  /** {@inheritDoc} */
  public void release() {
    object = null;
    super.release();
  }

  /**
   * @param object The object to set.
   */
  public void setObject(Object object) {
    this.object = object;
  }

  /** {@inheritDoc} */
  public void doCatch(Throwable t) throws Throwable {
    if (! (t instanceof IllegalStateException)) {
      throw t;
    }
  }

  /** {@inheritDoc} */
  public void doFinally() {
    release();
  }
}