/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.test.utility.iterators;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.NoSuchElementException;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.eclipse.persistence.tools.workbench.utility.filters.Filter;
import org.eclipse.persistence.tools.workbench.utility.filters.SimpleFilter;
import org.eclipse.persistence.tools.workbench.utility.iterators.FilteringIterator;
public class FilteringIteratorTests extends TestCase {
private static final String PREFIX = "prefix";
public static Test suite() {
return new TestSuite(FilteringIteratorTests.class);
}
public FilteringIteratorTests(String name) {
super(name);
}
public void testUnsupportedOperationException() {
boolean exCaught = false;
for (Iterator stream = this.buildAcceptIterator(); stream.hasNext(); ) {
String string = (String) stream.next();
if (string.equals(PREFIX + "3")) {
try {
stream.remove();
} catch (UnsupportedOperationException ex) {
exCaught = true;
}
}
}
assertTrue("UnsupportedOperationException not thrown", exCaught);
}
public void testNoSuchElementException() {
boolean exCaught = false;
Iterator stream = this.buildAcceptIterator();
String string = null;
while (stream.hasNext()) {
string = (String) stream.next();
}
try {
string = (String) stream.next();
} catch (NoSuchElementException ex) {
exCaught = true;
}
assertTrue("NoSuchElementException not thrown: " + string, exCaught);
}
public void testAcceptHasNext() {
int i = 0;
for (Iterator stream = this.buildAcceptIterator(); stream.hasNext(); ) {
stream.next();
i++;
}
assertEquals(6, i);
}
public void testAcceptNext() {
for (Iterator stream = this.buildAcceptIterator(); stream.hasNext(); ) {
assertTrue("bogus accept", ((String) stream.next()).startsWith(PREFIX));
}
}
public void testInnerHasNext() {
int i = 0;
for (Iterator stream = this.buildInnerIterator(); stream.hasNext(); ) {
stream.next();
i++;
}
assertEquals(6, i);
}
public void testInnerNext() {
for (Iterator stream = this.buildInnerIterator(); stream.hasNext(); ) {
assertTrue("bogus accept", ((String) stream.next()).startsWith(PREFIX));
}
}
public void testRejectHasNext() {
int i = 0;
for (Iterator stream = this.buildRejectIterator(); stream.hasNext(); ) {
stream.next();
i++;
}
assertEquals(2, i);
}
public void testRejectNext() {
for (Iterator stream = this.buildRejectIterator(); stream.hasNext(); ) {
assertFalse("bogus reject", ((String) stream.next()).startsWith(PREFIX));
}
}
public void testBothHasNext() {
// if both accept() and reject() are overridden, accept() is used
int i = 0;
for (Iterator stream = this.buildBothIterator(); stream.hasNext(); ) {
stream.next();
i++;
}
assertEquals(6, i);
}
public void testLoadNext() {
// loadNext() used to cause a NPE when executing during the
// constructor because the "outer" class is not bound until completion
// of the constructor
for (Iterator stream = this.buildInnerIterator2(); stream.hasNext(); ) {
assertTrue("bogus accept", ((String) stream.next()).startsWith(PREFIX));
}
}
private Iterator buildFilteredIterator(Iterator nestedIterator, Filter filter) {
return new FilteringIterator(nestedIterator, filter);
}
private Iterator buildInnerFilteredIterator(Iterator nestedIterator) {
return new FilteringIterator(nestedIterator) {
protected boolean accept(Object next) {
return ((String) next).startsWith(PREFIX);
}
};
}
String getPrefix() {
return PREFIX;
}
// this inner iterator will call the "outer" object
private Iterator buildInnerFilteredIterator2(Iterator nestedIterator) {
return new FilteringIterator(nestedIterator) {
protected boolean accept(Object next) {
return ((String) next).startsWith(FilteringIteratorTests.this.getPrefix());
}
};
}
private Iterator buildNestedIterator() {
Collection c = new ArrayList();
c.add(PREFIX + "1");
c.add(PREFIX + "2");
c.add(PREFIX + "3");
c.add("4");
c.add(PREFIX + "5");
c.add(PREFIX + "6");
c.add(PREFIX + "7");
c.add("8");
return c.iterator();
}
private Iterator buildAcceptIterator() {
return this.buildFilteredIterator(this.buildNestedIterator(), this.buildAcceptFilter(PREFIX));
}
private Iterator buildInnerIterator() {
return this.buildInnerFilteredIterator(this.buildNestedIterator());
}
// this inner iterator will call the "outer" object
private Iterator buildInnerIterator2() {
return this.buildInnerFilteredIterator2(this.buildNestedIterator());
}
private Filter buildAcceptFilter(String prefix) {
return new SimpleFilter(prefix) {
public boolean accept(Object next) {
return ((String) next).startsWith((String) this.criterion);
}
};
}
private Iterator buildRejectIterator() {
return this.buildFilteredIterator(this.buildNestedIterator(), this.buildRejectFilter(PREFIX));
}
private Filter buildRejectFilter(String prefix) {
return new SimpleFilter(prefix) {
public boolean reject(Object next) {
return ((String) next).startsWith((String) this.criterion);
}
};
}
private Iterator buildBothIterator() {
return this.buildFilteredIterator(this.buildNestedIterator(), this.buildBothFilter(PREFIX));
}
private Filter buildBothFilter(String prefix) {
return new SimpleFilter(prefix) {
public boolean reject(Object next) {
return ((String) next).startsWith((String) this.criterion);
}
public boolean accept(Object next) {
return ((String) next).startsWith((String) this.criterion);
}
};
}
}