001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017package org.apache.logging.log4j.taglib; 018 019import java.util.ArrayList; 020import java.util.List; 021import javax.servlet.jsp.JspException; 022import javax.servlet.jsp.tagext.DynamicAttributes; 023import javax.servlet.jsp.tagext.Tag; 024 025import org.apache.logging.log4j.Level; 026 027/** 028 * This class implements the {@code <log:entry>} tag. 029 * 030 * @since 2.0 031 */ 032public class EntryTag extends LoggerAwareTagSupport implements DynamicAttributes { 033 private static final long serialVersionUID = 1L; 034 035 private static final String FQCN = EntryTag.class.getName(); 036 037 private List<Object> attributes; 038 039 @Override 040 protected void init() { 041 super.init(); 042 if (this.attributes == null) { 043 this.attributes = new ArrayList<Object>(); 044 } else { 045 this.attributes.clear(); 046 } 047 } 048 049 @Override 050 public void setDynamicAttribute(final String uri, final String name, final Object value) { 051 this.attributes.add(value); 052 } 053 054 @Override 055 public int doEndTag() throws JspException { 056 final Log4jTaglibLogger logger = this.getLogger(); 057 058 if (TagUtils.isEnabled(logger, Level.TRACE, null)) { 059 if (this.attributes.size() == 0) { 060 logger.entry(FQCN); 061 } else { 062 logger.entry(FQCN, this.attributes.toArray()); 063 } 064 } 065 066 return Tag.EVAL_PAGE; 067 } 068}