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Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/iterators/CompositeListIterator.java')
-rw-r--r--jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/iterators/CompositeListIterator.java194
1 files changed, 0 insertions, 194 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/iterators/CompositeListIterator.java b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/iterators/CompositeListIterator.java
deleted file mode 100644
index c2037f053d..0000000000
--- a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/iterators/CompositeListIterator.java
+++ /dev/null
@@ -1,194 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2005, 2008 Oracle. 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:
- * Oracle - initial API and implementation
- ******************************************************************************/
-package org.eclipse.jpt.utility.internal.iterators;
-
-import java.util.List;
-import java.util.ListIterator;
-import java.util.NoSuchElementException;
-import org.eclipse.jpt.utility.internal.StringTools;
-
-/**
- * A <code>CompositeListIterator</code> wraps a list
- * of <code>ListIterator</code>s and makes them appear to be a single
- * <code>ListIterator</code>.
- */
-public class CompositeListIterator<E>
- implements ListIterator<E>
-{
- private final ListIterator<? extends ListIterator<E>> iterators;
- private ListIterator<E> nextIterator;
- private int nextIndex;
- /**
- * true if "next" was last returned; false if "previous" was last returned;
- * this determines the effect of remove(Object) on nextIndex
- */
- private boolean nextReturned;
- private ListIterator<E> lastIteratorToReturnElement;
-
-
- /**
- * Construct a list iterator with the specified list of list iterators.
- */
- public CompositeListIterator(List<? extends ListIterator<E>> iterators) {
- this(iterators.listIterator());
- }
-
- /**
- * Construct a list iterator with the specified list of list iterators.
- */
- public CompositeListIterator(ListIterator<? extends ListIterator<E>> iterators) {
- super();
- this.iterators = iterators;
- this.nextIndex = 0;
- this.nextReturned = false;
- }
-
- /**
- * Construct a list iterator with the specified object prepended
- * to the specified iterator.
- */
- @SuppressWarnings("unchecked")
- public CompositeListIterator(E object, ListIterator<E> iterator) {
- this(new SingleElementListIterator<E>(object), iterator);
- }
-
- /**
- * Construct a list iterator with the specified object appended
- * to the specified iterator.
- */
- @SuppressWarnings("unchecked")
- public CompositeListIterator(ListIterator<E> iterator, E object) {
- this(iterator, new SingleElementListIterator<E>(object));
- }
-
- /**
- * Construct a list iterator with the specified list iterators.
- */
- public CompositeListIterator(ListIterator<E>... iterators) {
- this(new ArrayListIterator<ListIterator<E>>(iterators));
- }
-
- public void add(E o) {
- this.checkNextIterator();
- this.nextIterator.add(o);
- this.nextIndex++;
- }
-
- public boolean hasNext() {
- try {
- this.loadNextIterator();
- } catch (NoSuchElementException ex) {
- // this occurs if there are no iterators at all
- return false;
- }
- return this.nextIterator.hasNext();
- }
-
- public boolean hasPrevious() {
- try {
- this.loadPreviousIterator();
- } catch (NoSuchElementException ex) {
- // this occurs if there are no iterators at all
- return false;
- }
- return this.nextIterator.hasPrevious();
- }
-
- public E next() {
- this.loadNextIterator();
- E result = this.nextIterator.next();
-
- // the statement above will throw a NoSuchElementException
- // if the current iterator is at the end of the line;
- // so if we get here, we can set the 'lastIteratorToReturnElement'
- this.lastIteratorToReturnElement = this.nextIterator;
- this.nextIndex++;
- this.nextReturned = true;
-
- return result;
- }
-
- public int nextIndex() {
- return this.nextIndex;
- }
-
- public E previous() {
- this.loadPreviousIterator();
- E result = this.nextIterator.previous();
-
- // the statement above will throw a NoSuchElementException
- // if the current iterator is at the end of the line;
- // so if we get here, we can set the 'lastIteratorToReturnElement'
- this.lastIteratorToReturnElement = this.nextIterator;
- this.nextIndex--;
- this.nextReturned = false;
-
- return result;
- }
-
- public int previousIndex() {
- return this.nextIndex - 1;
- }
-
- public void remove() {
- if (this.lastIteratorToReturnElement == null) {
- throw new IllegalStateException();
- }
- this.lastIteratorToReturnElement.remove();
- if (this.nextReturned) {
- // decrement the index because the "next" element has moved forward in the list
- this.nextIndex--;
- }
- }
-
- public void set(E e) {
- if (this.lastIteratorToReturnElement == null) {
- throw new IllegalStateException();
- }
- this.lastIteratorToReturnElement.set(e);
- }
-
- /**
- * Load 'nextIterator' with the first iterator that <code>hasNext()</code>
- * or the final iterator if all the elements have already been retrieved.
- */
- private void loadNextIterator() {
- this.checkNextIterator();
- while (( ! this.nextIterator.hasNext()) && this.iterators.hasNext()) {
- this.nextIterator = this.iterators.next();
- }
- }
-
- /**
- * Load 'nextIterator' with the first iterator that <code>hasPrevious()</code>
- * or the first iterator if all the elements have already been retrieved.
- */
- private void loadPreviousIterator() {
- this.checkNextIterator();
- while (( ! this.nextIterator.hasPrevious()) && this.iterators.hasPrevious()) {
- this.nextIterator = this.iterators.previous();
- }
- }
-
- /**
- * If 'nextIterator' is null, load it with the first iterator.
- */
- private void checkNextIterator() {
- if (this.nextIterator == null) {
- this.nextIterator = this.iterators.next();
- }
- }
-
- @Override
- public String toString() {
- return StringTools.buildToStringFor(this, this.iterators);
- }
-
-}

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