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This is the core Apache Tika™ toolkit library from which all other modules inherit functionality. It also includes the core facades for the Tika API.

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/**
 * 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.tika.utils;


import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.tika.exception.TikaException;

public class ExceptionUtils {

    private final static Pattern MSG_PATTERN = Pattern.compile(":[^\r\n]+");

    /**
     * Simple util to get stack trace.
     * 

* This will unwrap a TikaException and return the cause if not null *

* NOTE: If your stacktraces are truncated, make sure to start your jvm * with: -XX:-OmitStackTraceInFastThrow * * @param t throwable * @return * @throws IOException */ public static String getFilteredStackTrace(Throwable t) { Throwable cause = t; if ((t instanceof TikaException) && t.getCause() != null) { cause = t.getCause(); } return getStackTrace(cause); } /** * Get the full stacktrace as a string * @param t * @return */ public static String getStackTrace(Throwable t) { Writer result = new StringWriter(); PrintWriter writer = new PrintWriter(result); t.printStackTrace(writer); try { writer.flush(); result.flush(); writer.close(); result.close(); } catch (IOException e) { //swallow } return result.toString(); } /** * Utility method to trim the message from a stack trace * string. *

* E.g. java.lang.IllegalStateException: Potential loop detected * will be trimmed to java.lang.IllegalStateException * @param trace string view of stack trace * @return trimmed stack trace */ public static String trimMessage(String trace) { Matcher msgMatcher = MSG_PATTERN.matcher(trace); if (msgMatcher.find()) { return msgMatcher.replaceFirst(""); } return trace; } }





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