org.aspectj.org.eclipse.jdt.internal.core.util.ToStringSorter Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of aspectjtools Show documentation
Show all versions of aspectjtools Show documentation
Tools from the AspectJ project
/*******************************************************************************
* Copyright (c) 2000, 2009 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.aspectj.org.eclipse.jdt.internal.core.util;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.function.Function;
/**
* The SortOperation takes a collection of objects and returns
* a sorted collection of these objects. The sorting of these
* objects is based on their toString(). They are sorted in
* alphabetical order.
*/
public class ToStringSorter {
private final Function toString;
public ToStringSorter(Function toString) {
this.toString = toString;
}
static class Pair implements Comparable> {
final T object;
final String string;
public Pair(T k, String s) {
this.object = k;
this.string = s;
}
@Override
public int compareTo(Pair other) {
return this.string.compareTo(other.string);
}
}
/**
* Return a new sorted collection from this unsorted collection.
*/
public List> sort(Collection unSorted) {
int size = unSorted.size();
//copy the list so can return a new sorted collection
List> sortedObjects = new ArrayList<>(size);
unSorted.forEach(k -> sortedObjects.add(new Pair<>(k, this.toString.apply(k))));
Collections.sort(sortedObjects);
return sortedObjects;
}
}