Attachment 23307 Details for Bug 46404 – New Version of ThrowableInformation class

New Version of ThrowableInformation class

ThrowableInformation.java (text/x-java), 2.92 KB, created by Hanno Neuer on 2009-02-25 07:37:53 UTC

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Creator: Hanno Neuer

Created: 2009-02-25 07:37:53 UTC

Size: 2.92 KB

patch

obsolete

>/*
> * 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.log4j.spi;
>
>import java.io.IOException;
>import java.io.LineNumberReader;
>import java.io.PrintWriter;
>import java.io.StringReader;
>import java.io.StringWriter;
>import java.util.ArrayList;
>
>/**
> * ThrowableInformation is log4j's internal representation of throwables. It
> * essentially consists of a string array, called 'rep', where the first
> * element, that is rep[0], represents the string representation of the
> * throwable (i.e. the value you get when you do throwable.toString()) and
> * subsequent elements correspond the stack trace with the top most entry of the
> * stack corresponding to the second entry of the 'rep' array that is rep[1].
> * <p>
> * The internal 'rep' is created and set in the constructors, calls to
> * {@link ThrowableInformation#getThrowableStrRep()} will then receive clones of
> * the internal field.
> * </p>
> * 
> * @author Ceki G&uuml;lc&uuml;
> */
>public class ThrowableInformation implements java.io.Serializable {
>
>  static final long serialVersionUID = -4748765566864322735L;
>
>  private transient Throwable throwable;
>  private String[] rep;
>
>  public ThrowableInformation(Throwable throwable) {
>    this.throwable = throwable;
>    createThrowableStrRep();
>  }
>
>  /**
>   * Create new instance.
>   * 
>   * @since 1.2.15
>   * @param r
>   *            String representation of throwable.
>   */
>  public ThrowableInformation(final String[] r) {
>    if (r != null) {
>      rep = (String[]) r.clone();
>    }
>  }
>
>  public Throwable getThrowable() {
>    return throwable;
>  }
>
>  public String[] getThrowableStrRep() {
>    return (String[]) rep.clone();
>  }
>
>  private void createThrowableStrRep() {
>    StringWriter sw = new StringWriter();
>    PrintWriter pw = new PrintWriter(sw);
>    throwable.printStackTrace(pw);
>    pw.flush();
>    LineNumberReader reader = new LineNumberReader(new StringReader(sw.toString()));
>    ArrayList lines = new ArrayList();
>    try {
>      String line = reader.readLine();
>      while (line != null) {
>        lines.add(line);
>        line = reader.readLine();
>      }
>    } catch (IOException ex) {
>      lines.add(ex.toString());
>    }
>    rep = (String[]) lines.toArray(new String[lines.size()]);
>  }
>}

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Attachments on bug 46404: 23307