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/*******************************************************************************
* Copyright (c) 2004, 2010 Tasktop Technologies and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Tasktop Technologies - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.ui.search;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.mylyn.internal.tasks.core.AbstractSearchHandler;
import org.eclipse.mylyn.internal.tasks.ui.TasksUiPlugin;
import org.eclipse.mylyn.tasks.core.AbstractDuplicateDetector;
import org.eclipse.mylyn.tasks.core.IRepositoryQuery;
import org.eclipse.mylyn.tasks.core.TaskRepository;
import org.eclipse.mylyn.tasks.core.data.TaskAttribute;
import org.eclipse.mylyn.tasks.core.data.TaskData;
import org.eclipse.mylyn.tasks.ui.TasksUi;
/**
* @author Gail Murphy
* @author Steffen Pingel
*/
public class StackTraceDuplicateDetector extends AbstractDuplicateDetector {
@Override
public boolean canQuery(TaskData taskData) {
return TasksUiPlugin.getDefault().getSearchHandler(taskData.getConnectorKind()) != null;
}
private String getDescription(TaskData taskData) {
TaskAttribute attribute = taskData.getRoot().getMappedAttribute(TaskAttribute.DESCRIPTION);
if (attribute == null) {
attribute = taskData.getRoot().getMappedAttribute(TaskAttribute.COMMENT_NEW);
}
return (attribute != null) ? attribute.getTaskData().getAttributeMapper().getValueLabel(attribute) : ""; //$NON-NLS-1$
}
@Override
public IRepositoryQuery getDuplicatesQuery(TaskRepository taskRepository, TaskData taskData) throws CoreException {
String description = getDescription(taskData);
String searchString = getStackTraceFromDescription(description);
if (searchString == null) {
throw new CoreException(new Status(IStatus.INFO, TasksUiPlugin.ID_PLUGIN,
"Unable to locate a stack trace in the description text.")); //$NON-NLS-1$
}
IRepositoryQuery query = TasksUi.getRepositoryModel().createRepositoryQuery(taskRepository);
AbstractSearchHandler searchHandler = TasksUiPlugin.getDefault().getSearchHandler(
taskRepository.getConnectorKind());
if (searchHandler.queryForText(taskRepository, query, taskData, searchString)) {
return query;
}
return null;
}
public static String getStackTraceFromDescription(String description) {
String stackTrace = null;
if (description == null) {
return null;
}
String punct = "!\"#$%&'\\(\\)*+,-./:;\\<=\\>?@\\[\\]^_`\\{|\\}~\n"; //$NON-NLS-1$
String lineRegex = " *at\\s+[\\w" + punct + "]+ ?\\(.*\\) *\n?"; //$NON-NLS-1$ //$NON-NLS-2$
Pattern tracePattern = Pattern.compile(lineRegex);
Matcher match = tracePattern.matcher(description);
if (match.find()) {
// record the index of the first stack trace line
int start = match.start();
int lastEnd = match.end();
// find the last stack trace line
while (match.find()) {
lastEnd = match.end();
}
// make sure there's still room to find the exception
if (start <= 0) {
return null;
}
// count back to the line before the stack trace to find the
// exception
int stackStart = 0;
int index = start - 1;
while (index > 1 && description.charAt(index) == ' ') {
index--;
}
// locate the exception line index
stackStart = description.substring(0, index - 1).lastIndexOf("\n"); //$NON-NLS-1$
stackStart = (stackStart == -1) ? 0 : stackStart + 1;
stackTrace = description.substring(stackStart, lastEnd);
}
return stackTrace;
}
}
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