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StringUtil.java | 0% | 0% | 0% | 0% |
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/*
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* ====================================================================
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*
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* The Apache Software License, Version 1.1
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*
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* Copyright (c) 2001-2003 The Apache Software Foundation. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The end-user documentation included with the redistribution, if
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* any, must include the following acknowlegement:
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* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowlegement may appear in the software itself,
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* if and wherever such third-party acknowlegements normally appear.
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*
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* 4. The names "The Jakarta Project", "Cactus" and "Apache Software
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* Foundation" must not be used to endorse or promote products
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* derived from this software without prior written permission. For
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* written permission, please contact apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache"
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* nor may "Apache" appear in their names without prior written
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* permission of the Apache Group.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package org.apache.cactus.util;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.io.StringReader;
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import java.io.StringWriter;
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/**
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* Various utility methods for string manipulation.
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*
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* @author <a href="mailto:vmassol@apache.org">Vincent Massol</a>
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* @author <a href="mailto:cmlenz@apache.org">Christopher Lenz</a>
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*
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* @version $Id: StringUtil.java,v 1.5 2003/01/03 15:35:46 vmassol Exp $
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*/
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public class StringUtil |
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{ |
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/**
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* Returns the stack trace of an exception as String.
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*
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* @param theThrowable the exception from which to extract the stack trace
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* as a String
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* @return the exception stack trace as a String
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*/
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public static String exceptionToString(Throwable theThrowable) |
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{ |
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return exceptionToString(theThrowable, null); |
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} |
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/**
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* Returns the stack trace of an exception as String, optionally filtering
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* out line from the stack trac
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*
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* @param theThrowable the exception from which to extract the stack trace
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* as a String
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* @param theFilterPatterns Array containing a list of patterns to filter
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* out from the stack trace
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* @return the exception stack trace as a String
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*/
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public static String exceptionToString(Throwable theThrowable, |
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String[] theFilterPatterns) |
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{ |
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StringWriter sw = new StringWriter();
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PrintWriter pw = new PrintWriter(sw);
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theThrowable.printStackTrace(pw); |
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String stackTrace = sw.toString(); |
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return filterStackTrace(stackTrace, theFilterPatterns);
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} |
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/**
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*
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*
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* @param theStackTrace The original, unfiltered stack trace
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* @param theFilterPatterns The patterns to filter out
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* @return The filtered stack trace
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*/
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static String filterStackTrace(String theStackTrace,
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String[] theFilterPatterns) |
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{ |
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if ((theFilterPatterns == null) || (theFilterPatterns.length == 0) |
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|| (theStackTrace == null))
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{ |
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return theStackTrace;
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} |
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StringWriter stringWriter = new StringWriter();
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PrintWriter printWriter = new PrintWriter(stringWriter);
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StringReader stringReader = new StringReader(theStackTrace);
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BufferedReader bufferedReader = new BufferedReader(stringReader);
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String line; |
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try
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{ |
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while ((line = bufferedReader.readLine()) != null) |
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{ |
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if (!filterLine(line, theFilterPatterns))
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{ |
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printWriter.println(line); |
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} |
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} |
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} |
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catch (IOException e)
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{ |
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return theStackTrace;
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} |
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return stringWriter.toString();
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} |
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/**
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*
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*
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* @param theLine The line to check
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* @param theFilterPatterns The patterns to filter out
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* @return boolean Whether the specified line should be filtered from the
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* stack trace
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*/
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static boolean filterLine(String theLine, String[] theFilterPatterns) |
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{ |
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for (int i = 0; i < theFilterPatterns.length; i++) |
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{ |
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if (theLine.indexOf(theFilterPatterns[i]) > 0)
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{ |
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return true; |
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} |
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} |
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return false; |
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} |
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} |
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