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 */ 017 package org.apache.logging.log4j.taglib; 018 019 import java.util.ArrayList; 020 import java.util.List; 021 022 import javax.servlet.jsp.JspException; 023 import javax.servlet.jsp.tagext.DynamicAttributes; 024 import javax.servlet.jsp.tagext.Tag; 025 026 import org.apache.logging.log4j.Level; 027 028 /** 029 * This class implements the {@code <log:entry>} tag. 030 * 031 * @since 2.0 032 */ 033 public class EntryTag extends LoggerAwareTagSupport implements DynamicAttributes { 034 private static final long serialVersionUID = 1L; 035 036 private static final String FQCN = EntryTag.class.getName(); 037 038 private List<Object> attributes; 039 040 @Override 041 protected void init() { 042 super.init(); 043 if (this.attributes == null) { 044 this.attributes = new ArrayList<Object>(); 045 } else { 046 this.attributes.clear(); 047 } 048 } 049 050 @Override 051 public void setDynamicAttribute(final String uri, final String name, final Object value) { 052 this.attributes.add(value); 053 } 054 055 @Override 056 public int doEndTag() throws JspException { 057 final Log4jTaglibLogger logger = this.getLogger(); 058 059 if (TagUtils.isEnabled(logger, Level.TRACE, null)) { 060 if (this.attributes.size() == 0) { 061 logger.entry(FQCN); 062 } else { 063 logger.entry(FQCN, this.attributes.toArray()); 064 } 065 } 066 067 return Tag.EVAL_PAGE; 068 } 069 }