001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *   http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    
020    package org.apache.fulcrum.yaafi.interceptor.util;
021    
022    /**
023     * Creates a string representation of java.lang.reflect.Method
024     *
025     * @author <a href="mailto:siegfried.goeschl@it20one.at">Siegfried Goeschl</a>
026     */
027    public class DefaultToStringBuilderImpl implements InterceptorToStringBuilder
028    {
029        /** the target object */
030        private Object target;
031    
032        /** the output for a NULL value **/
033        private static final String NULL_STRING = "<null>";
034    
035        /**
036         * Constructor
037         */
038        public DefaultToStringBuilderImpl()
039        {
040            // nothing to do
041        }
042    
043        /**
044         * Constructor
045         *
046         * @param target the object to print
047         */
048        public DefaultToStringBuilderImpl(Object target)
049        {
050            this.target = target;
051        }
052    
053        /**
054         * @see org.apache.fulcrum.yaafi.interceptor.util.InterceptorToStringBuilder#setTarget(java.lang.Object)
055         */
056        public void setTarget(Object target)
057        {
058            this.target = target;
059        }
060    
061        /**
062         * @see org.apache.fulcrum.yaafi.interceptor.util.InterceptorToStringBuilder#setMaxArgLength(int)
063         */
064        public void setMaxArgLength(int maxArgLength)
065        {
066            // not supported
067        }
068    
069        /**
070         * @see org.apache.fulcrum.yaafi.interceptor.util.InterceptorToStringBuilder#setMode(int)
071         */
072        public void setMode(int mode)
073        {
074            // not supported
075        }
076    
077        /**
078         * @see java.lang.Object#toString()
079         */
080        public String toString()
081        {
082            String result = null;
083    
084            try
085            {
086                if( this.target == null )
087                {
088                    result = NULL_STRING;
089                }
090                else
091                {
092                    result = this.target.toString();
093                }
094            }
095            catch (Throwable t)
096            {
097                t.printStackTrace();
098                result = "<" + t + ">";
099            }
100    
101            return result;
102        }
103    }