/*******************************************************************************
* Copyright (c) 2012 VMware, Inc.
* 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:
* VMware, Inc. - initial API and implementation
*******************************************************************************/
package org.springframework.ide.eclipse.metadata.ui;
import java.util.Comparator;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.swt.SWT;
import org.springframework.util.AntPathMatcher;
/**
* @author Leo Dos Santos
*/
public class RequestMappingViewSorter extends ViewerSorter {
private RequestMappingViewLabelProvider labelProvider;
private AntPathMatcher matcher;
private int sortColumn;
private int sortDirection;
public RequestMappingViewSorter(
RequestMappingViewLabelProvider labelProvider) {
matcher = new AntPathMatcher();
this.labelProvider = labelProvider;
}
@Override
public int compare(Viewer viewer, Object e1, Object e2) {
int result = compareColumn(viewer, e1, e2);
if (sortDirection == SWT.UP) {
return result;
}
return result * -1;
}
public void setSortColumn(int column) {
sortColumn = column;
}
public void setSortDirection(int direction) {
sortDirection = direction;
}
private int compareColumn(Viewer viewer, Object e1, Object e2) {
if (sortColumn == RequestMappingView.COLUMN_URL) {
return sortByUrl(e1, e2);
} else if (sortColumn == RequestMappingView.COLUMN_REQUEST_METHOD) {
int result = sortByRequestMethod(e1, e2);
if (result == 0) {
result = sortByHandlerMethod(e1, e2);
}
return result;
} else if (sortColumn == RequestMappingView.COLUMN_HANDLER_METHOD) {
return sortByHandlerMethod(e1, e2);
}
return 0;
}
private int sortByHandlerMethod(Object e1, Object e2) {
String str1 = labelProvider.getColumnText(e1,
RequestMappingView.COLUMN_HANDLER_METHOD);
String str2 = labelProvider.getColumnText(e2,
RequestMappingView.COLUMN_HANDLER_METHOD);
return str1.compareTo(str2);
}
private int sortByRequestMethod(Object e1, Object e2) {
String str1 = labelProvider.getColumnText(e1,
RequestMappingView.COLUMN_REQUEST_METHOD);
String str2 = labelProvider.getColumnText(e2,
RequestMappingView.COLUMN_REQUEST_METHOD);
return str1.compareTo(str2);
}
private int sortByUrl(Object e1, Object e2) {
String str1 = labelProvider.getColumnText(e1,
RequestMappingView.COLUMN_URL);
String str2 = labelProvider.getColumnText(e2,
RequestMappingView.COLUMN_URL);
String prefix = getCommonPrefix(str1, str2);
str1 = str1.substring(prefix.length(), str1.length());
str2 = str2.substring(prefix.length(), str2.length());
Comparator<String> comparator = matcher.getPatternComparator(prefix);
if (prefix.length() > 1
&& (matcher.isPattern(str1) || str1.contains("{") //$NON-NLS-1$
|| matcher.isPattern(str2) || str2.contains("{"))) { //$NON-NLS-1$
return comparator.compare(str1, str2);
} else {
int strResult = str1.compareTo(str2);
if (strResult == 0) {
// If urls are equal, sort by method name
strResult = sortByHandlerMethod(e1, e2);
}
return strResult;
}
}
private String getCommonPrefix(String str1, String str2) {
if (str1.equals(str2)) {
return str1;
}
String prefix = ""; //$NON-NLS-1$
int i = 0;
while (i < str1.length() && i < str2.length()) {
String s = str1.substring(i, i + 1);
if (s.equals(str2.substring(i, i + 1))) {
prefix = prefix.concat(s);
i++;
} else {
break;
}
}
return prefix;
}
}