Add UnmodifiableIterator classes to iterators package
git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/collections/trunk@131316 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Stephen Colebourne
parent
e1f52a4797
commit
60fcc4fb8d
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@ -0,0 +1,120 @@
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/*
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* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/java/org/apache/commons/collections/iterators/UnmodifiableIterator.java,v 1.1 2003/11/02 17:26:36 scolebourne Exp $
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* ====================================================================
|
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*
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* The Apache Software License, Version 1.1
|
||||
*
|
||||
* Copyright (c) 1999-2003 The Apache Software Foundation. All rights
|
||||
* reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
*
|
||||
* 3. The end-user documentation included with the redistribution, if
|
||||
* any, must include the following acknowledgement:
|
||||
* "This product includes software developed by the
|
||||
* Apache Software Foundation (http://www.apache.org/)."
|
||||
* Alternately, this acknowledgement may appear in the software itself,
|
||||
* if and wherever such third-party acknowledgements normally appear.
|
||||
*
|
||||
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
|
||||
* Foundation" must not be used to endorse or promote products derived
|
||||
* from this software without prior written permission. For written
|
||||
* permission, please contact apache@apache.org.
|
||||
*
|
||||
* 5. Products derived from this software may not be called "Apache"
|
||||
* nor may "Apache" appear in their names without prior written
|
||||
* permission of the Apache Software Foundation.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
|
||||
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
||||
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||||
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
||||
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
* ====================================================================
|
||||
*
|
||||
* This software consists of voluntary contributions made by many
|
||||
* individuals on behalf of the Apache Software Foundation. For more
|
||||
* information on the Apache Software Foundation, please see
|
||||
* <http://www.apache.org/>.
|
||||
*
|
||||
*/
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package org.apache.commons.collections.iterators;
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import java.util.Iterator;
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import org.apache.commons.collections.Unmodifiable;
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/**
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* Decorates an iterator such that it cannot be modified.
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*
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* @since Commons Collections 3.0
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* @version $Revision: 1.1 $ $Date: 2003/11/02 17:26:36 $
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*
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* @author Stephen Colebourne
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*/
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public final class UnmodifiableIterator implements Iterator, Unmodifiable {
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/** The iterator being decorated */
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private Iterator iterator;
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//-----------------------------------------------------------------------
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/**
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* Decorates the specified iterator such that it cannot be modified.
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* <p>
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* If the iterator is already unmodifiable it is returned directly.
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*
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* @param iterator the iterator to decoarate
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* @throws IllegalArgumentException if the iterator is null
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*/
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public static Iterator decorate(Iterator iterator) {
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if (iterator == null) {
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throw new IllegalArgumentException("Iterator must not be null");
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}
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if (iterator instanceof Unmodifiable) {
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return iterator;
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}
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return new UnmodifiableIterator(iterator);
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}
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//-----------------------------------------------------------------------
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/**
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* Constructor.
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*
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* @param iterator the iterator to decoarate
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*/
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protected UnmodifiableIterator(Iterator iterator) {
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super();
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this.iterator = iterator;
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}
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//-----------------------------------------------------------------------
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public boolean hasNext() {
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return iterator.hasNext();
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}
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public Object next() {
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return iterator.next();
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}
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public void remove() {
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throw new UnsupportedOperationException("remove() is not supported");
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}
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}
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@ -0,0 +1,142 @@
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/*
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* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/java/org/apache/commons/collections/iterators/UnmodifiableListIterator.java,v 1.1 2003/11/02 17:26:36 scolebourne Exp $
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* ====================================================================
|
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*
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* The Apache Software License, Version 1.1
|
||||
*
|
||||
* Copyright (c) 1999-2003 The Apache Software Foundation. All rights
|
||||
* reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
*
|
||||
* 3. The end-user documentation included with the redistribution, if
|
||||
* any, must include the following acknowledgement:
|
||||
* "This product includes software developed by the
|
||||
* Apache Software Foundation (http://www.apache.org/)."
|
||||
* Alternately, this acknowledgement may appear in the software itself,
|
||||
* if and wherever such third-party acknowledgements normally appear.
|
||||
*
|
||||
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
|
||||
* Foundation" must not be used to endorse or promote products derived
|
||||
* from this software without prior written permission. For written
|
||||
* permission, please contact apache@apache.org.
|
||||
*
|
||||
* 5. Products derived from this software may not be called "Apache"
|
||||
* nor may "Apache" appear in their names without prior written
|
||||
* permission of the Apache Software Foundation.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
|
||||
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
||||
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||||
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
||||
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
* ====================================================================
|
||||
*
|
||||
* This software consists of voluntary contributions made by many
|
||||
* individuals on behalf of the Apache Software Foundation. For more
|
||||
* information on the Apache Software Foundation, please see
|
||||
* <http://www.apache.org/>.
|
||||
*
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||||
*/
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package org.apache.commons.collections.iterators;
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import java.util.ListIterator;
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import org.apache.commons.collections.Unmodifiable;
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/**
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* Decorates a list iterator such that it cannot be modified.
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*
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* @since Commons Collections 3.0
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* @version $Revision: 1.1 $ $Date: 2003/11/02 17:26:36 $
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*
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* @author Stephen Colebourne
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*/
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public final class UnmodifiableListIterator implements ListIterator, Unmodifiable {
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/** The iterator being decorated */
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private ListIterator iterator;
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//-----------------------------------------------------------------------
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/**
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* Decorates the specified iterator such that it cannot be modified.
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*
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* @param iterator the iterator to decoarate
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* @throws IllegalArgumentException if the iterator is null
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*/
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public static ListIterator decorate(ListIterator iterator) {
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if (iterator == null) {
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throw new IllegalArgumentException("ListIterator must not be null");
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}
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if (iterator instanceof Unmodifiable) {
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return iterator;
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}
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return new UnmodifiableListIterator(iterator);
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}
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//-----------------------------------------------------------------------
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/**
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* Constructor.
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*
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* @param iterator the iterator to decoarate
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*/
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protected UnmodifiableListIterator(ListIterator iterator) {
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super();
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this.iterator = iterator;
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}
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//-----------------------------------------------------------------------
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public boolean hasNext() {
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return iterator.hasNext();
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}
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public Object next() {
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return iterator.next();
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}
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public int nextIndex() {
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return iterator.nextIndex();
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}
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public boolean hasPrevious() {
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return iterator.hasPrevious();
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}
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public Object previous() {
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return iterator.previous();
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}
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public int previousIndex() {
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return iterator.previousIndex();
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}
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public void remove() {
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throw new UnsupportedOperationException("remove() is not supported");
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}
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public void set(Object obj) {
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throw new UnsupportedOperationException("set() is not supported");
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}
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public void add(Object obj) {
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throw new UnsupportedOperationException("add() is not supported");
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}
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}
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@ -1,5 +1,5 @@
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/*
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* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/test/org/apache/commons/collections/iterators/TestAll.java,v 1.7 2003/10/05 21:26:46 scolebourne Exp $
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* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/test/org/apache/commons/collections/iterators/TestAll.java,v 1.8 2003/11/02 17:26:36 scolebourne Exp $
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* ====================================================================
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*
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* The Apache Software License, Version 1.1
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|
|
@ -64,7 +64,7 @@ import junit.framework.TestSuite;
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/**
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* Entry point for all iterator tests.
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*
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* @version $Revision: 1.7 $ $Date: 2003/10/05 21:26:46 $
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* @version $Revision: 1.8 $ $Date: 2003/11/02 17:26:36 $
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*
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* @author Rodney Waldhoff
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*/
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@ -92,6 +92,8 @@ public class TestAll extends TestCase {
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suite.addTest(TestSingletonIterator.suite());
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suite.addTest(TestSingletonListIterator.suite());
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suite.addTest(TestUniqueFilterIterator.suite());
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suite.addTest(TestUnmodifiableIterator.suite());
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suite.addTest(TestUnmodifiableListIterator.suite());
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return suite;
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}
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@ -0,0 +1,121 @@
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/*
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* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/test/org/apache/commons/collections/iterators/TestUnmodifiableIterator.java,v 1.1 2003/11/02 17:26:36 scolebourne Exp $
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* ====================================================================
|
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*
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* The Apache Software License, Version 1.1
|
||||
*
|
||||
* Copyright (c) 2001-2003 The Apache Software Foundation. All rights
|
||||
* reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
*
|
||||
* 3. The end-user documentation included with the redistribution, if
|
||||
* any, must include the following acknowledgement:
|
||||
* "This product includes software developed by the
|
||||
* Apache Software Foundation (http://www.apache.org/)."
|
||||
* Alternately, this acknowledgement may appear in the software itself,
|
||||
* if and wherever such third-party acknowledgements normally appear.
|
||||
*
|
||||
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
|
||||
* Foundation" must not be used to endorse or promote products derived
|
||||
* from this software without prior written permission. For written
|
||||
* permission, please contact apache@apache.org.
|
||||
*
|
||||
* 5. Products derived from this software may not be called "Apache"
|
||||
* nor may "Apache" appear in their names without prior written
|
||||
* permission of the Apache Software Foundation.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
|
||||
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
||||
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||||
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
||||
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
* ====================================================================
|
||||
*
|
||||
* This software consists of voluntary contributions made by many
|
||||
* individuals on behalf of the Apache Software Foundation. For more
|
||||
* information on the Apache Software Foundation, please see
|
||||
* <http://www.apache.org/>.
|
||||
*
|
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*/
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package org.apache.commons.collections.iterators;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.List;
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import junit.framework.Test;
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import junit.framework.TestSuite;
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import org.apache.commons.collections.Unmodifiable;
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/**
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* Tests the UnmodifiableIterator.
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*
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* @version $Revision: 1.1 $ $Date: 2003/11/02 17:26:36 $
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*
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* @author Stephen Colebourne
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*/
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public class TestUnmodifiableIterator extends AbstractTestIterator {
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protected String[] testArray = { "One", "Two", "Three" };
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protected List testList = new ArrayList(Arrays.asList(testArray));
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public static Test suite() {
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return new TestSuite(TestUnmodifiableIterator.class);
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}
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public TestUnmodifiableIterator(String testName) {
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super(testName);
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}
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public Iterator makeEmptyIterator() {
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return UnmodifiableIterator.decorate(Collections.EMPTY_LIST.iterator());
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}
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public Iterator makeFullIterator() {
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return UnmodifiableIterator.decorate(testList.iterator());
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}
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public boolean supportsRemove() {
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return false;
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}
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//-----------------------------------------------------------------------
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public void testIterator() {
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assertTrue(makeEmptyIterator() instanceof Unmodifiable);
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}
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public void testDecorateFactory() {
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Iterator it = makeFullIterator();
|
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assertSame(it, UnmodifiableIterator.decorate(it));
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it = testList.iterator();
|
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assertTrue(it != UnmodifiableIterator.decorate(it));
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try {
|
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UnmodifiableIterator.decorate(null);
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fail();
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} catch (IllegalArgumentException ex) {}
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}
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}
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@ -0,0 +1,129 @@
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/*
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* $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/test/org/apache/commons/collections/iterators/TestUnmodifiableListIterator.java,v 1.1 2003/11/02 17:26:36 scolebourne Exp $
|
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* ====================================================================
|
||||
*
|
||||
* The Apache Software License, Version 1.1
|
||||
*
|
||||
* Copyright (c) 2001-2003 The Apache Software Foundation. All rights
|
||||
* reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
*
|
||||
* 3. The end-user documentation included with the redistribution, if
|
||||
* any, must include the following acknowledgement:
|
||||
* "This product includes software developed by the
|
||||
* Apache Software Foundation (http://www.apache.org/)."
|
||||
* Alternately, this acknowledgement may appear in the software itself,
|
||||
* if and wherever such third-party acknowledgements normally appear.
|
||||
*
|
||||
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
|
||||
* Foundation" must not be used to endorse or promote products derived
|
||||
* from this software without prior written permission. For written
|
||||
* permission, please contact apache@apache.org.
|
||||
*
|
||||
* 5. Products derived from this software may not be called "Apache"
|
||||
* nor may "Apache" appear in their names without prior written
|
||||
* permission of the Apache Software Foundation.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
|
||||
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
||||
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||||
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
||||
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
* ====================================================================
|
||||
*
|
||||
* This software consists of voluntary contributions made by many
|
||||
* individuals on behalf of the Apache Software Foundation. For more
|
||||
* information on the Apache Software Foundation, please see
|
||||
* <http://www.apache.org/>.
|
||||
*
|
||||
*/
|
||||
package org.apache.commons.collections.iterators;
|
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|
||||
import java.util.ArrayList;
|
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import java.util.Arrays;
|
||||
import java.util.Collections;
|
||||
import java.util.List;
|
||||
import java.util.ListIterator;
|
||||
|
||||
import junit.framework.Test;
|
||||
import junit.framework.TestSuite;
|
||||
|
||||
import org.apache.commons.collections.Unmodifiable;
|
||||
|
||||
/**
|
||||
* Tests the UnmodifiableListIterator.
|
||||
*
|
||||
* @version $Revision: 1.1 $ $Date: 2003/11/02 17:26:36 $
|
||||
*
|
||||
* @author Stephen Colebourne
|
||||
*/
|
||||
public class TestUnmodifiableListIterator extends AbstractTestListIterator {
|
||||
|
||||
protected String[] testArray = { "One", "Two", "Three" };
|
||||
protected List testList = new ArrayList(Arrays.asList(testArray));
|
||||
|
||||
public static Test suite() {
|
||||
return new TestSuite(TestUnmodifiableListIterator.class);
|
||||
}
|
||||
|
||||
public TestUnmodifiableListIterator(String testName) {
|
||||
super(testName);
|
||||
}
|
||||
|
||||
public ListIterator makeEmptyListIterator() {
|
||||
return UnmodifiableListIterator.decorate(Collections.EMPTY_LIST.listIterator());
|
||||
}
|
||||
|
||||
public ListIterator makeFullListIterator() {
|
||||
return UnmodifiableListIterator.decorate(testList.listIterator());
|
||||
}
|
||||
|
||||
public boolean supportsRemove() {
|
||||
return false;
|
||||
}
|
||||
|
||||
public boolean supportsAdd() {
|
||||
return false;
|
||||
}
|
||||
|
||||
public boolean supportsSet() {
|
||||
return false;
|
||||
}
|
||||
|
||||
//-----------------------------------------------------------------------
|
||||
public void testListIterator() {
|
||||
assertTrue(makeEmptyListIterator() instanceof Unmodifiable);
|
||||
}
|
||||
|
||||
public void testDecorateFactory() {
|
||||
ListIterator it = makeFullListIterator();
|
||||
assertSame(it, UnmodifiableListIterator.decorate(it));
|
||||
|
||||
it = testList.listIterator();
|
||||
assertTrue(it != UnmodifiableListIterator.decorate(it));
|
||||
|
||||
try {
|
||||
UnmodifiableListIterator.decorate(null);
|
||||
fail();
|
||||
} catch (IllegalArgumentException ex) {}
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue