/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation, and/or the GNU Lesser
* General Public License, version 2.1, also as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License and the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* and the GNU Lesser General Public License along with this program;
* if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.rhq.test;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
public class CollectionEqualsChecker<T> {
private Collection<T> expected;
private Collection<T> actual;
public void setExpected(Collection<T> expected) {
this.expected = expected;
}
public void setActual(Collection<T> actual) {
this.actual = actual;
}
public EqualsResult execute() {
boolean isMatch = true;
StringBuilder details = new StringBuilder();
if (expected.size() != actual.size()) {
isMatch = false;
details.append("Expected " + expected.size() + " elements but found " + actual.size() + " elements\n");
}
List<T> elementsThatShouldBePresent = findMissingElements(expected, actual);
if (!elementsThatShouldBePresent.isEmpty()) {
isMatch = false;
details.append("Expected to find the following elements:\n\t" +
toString(elementsThatShouldBePresent) + "\n\n");
}
List<T> elementsThatShouldNotBePresent = findMissingElements(actual, expected);
if (!elementsThatShouldNotBePresent.isEmpty()) {
isMatch = false;
details.append("Did not expect to find the following elements:\n\t" +
toString(elementsThatShouldNotBePresent) + "\n\n");
}
return new EqualsResult(isMatch, details.toString());
}
private List<T> findMissingElements(Collection<T> elementsToSearchFor, Collection<T> elementsToSearch) {
List<T> missingElements = new ArrayList<T>();
for (T element : elementsToSearchFor) {
if (!elementsToSearch.contains(element)) {
missingElements.add(element);
}
}
return missingElements;
}
private String toString(List<T> list) {
StringBuilder buffer = new StringBuilder("[");
for (T element : list) {
buffer.append(element.toString() + ", ");
}
buffer.delete(buffer.length() - 2, buffer.length());
buffer.append("]");
return buffer.toString();
}
}