/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements. See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache license, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License. You may obtain a copy of the License at
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the license for the specific language governing permissions and
   * limitations under the license.
   */
  package org.apache.logging.log4j.taglib;
  
  import javax.servlet.jsp.JspException;
  import javax.servlet.jsp.tagext.Tag;
  
  import org.apache.logging.log4j.Level;
  import org.apache.logging.log4j.Marker;
  
  /**
   * This class implements the {@code <log:ifEnabled>} tag.
   *
   * @since 2.0
   */
  public class IfEnabledTag extends LoggerAwareTagSupport {
      private static final long serialVersionUID = 1L;
  
      private transient Object level;
  
      private Marker marker;
  
      @Override
      protected void init() {
          super.init();
          this.level = null;
          this.marker = null;
      }
  
      public final void setLevel(final Object level) {
          this.level = level;
      }
  
      public final void setMarker(final Marker marker) {
          this.marker = marker;
      }
  
      @Override
      public int doStartTag() throws JspException {
          final Level level = TagUtils.resolveLevel(this.level);
          if (level == null) {
              throw new JspException("Level must be of type String or org.apache.logging.log4j.Level.");
          }
  
          return TagUtils.isEnabled(this.getLogger(), level, this.marker) ? Tag.EVAL_BODY_INCLUDE : Tag.SKIP_BODY;
      }
  }