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Diffstat (limited to 'common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/iterables/CompositeListIterable.java')
-rw-r--r--common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/iterables/CompositeListIterable.java135
1 files changed, 135 insertions, 0 deletions
diff --git a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/iterables/CompositeListIterable.java b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/iterables/CompositeListIterable.java
new file mode 100644
index 0000000000..66f75626ef
--- /dev/null
+++ b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/iterables/CompositeListIterable.java
@@ -0,0 +1,135 @@
+/*******************************************************************************
+ * Copyright (c) 2009, 2010 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.common.utility.internal.iterables;
+
+import java.util.List;
+import java.util.ListIterator;
+
+import org.eclipse.jpt.common.utility.internal.StringTools;
+import org.eclipse.jpt.common.utility.internal.iterators.CompositeListIterator;
+import org.eclipse.jpt.common.utility.internal.iterators.TransformationListIterator;
+
+/**
+ * A <code>CompositeListIterable</code> wraps a {@link ListIterable}
+ * of {@link ListIterable}s and makes them appear to be a single
+ * {@link ListIterable}.
+ *
+ * @param <E> the type of elements returned by the list iterable's list iterator
+ *
+ * @see CompositeListIterator
+ * @see CompositeIterable
+ * @see ReadOnlyCompositeListIterable
+ */
+public class CompositeListIterable<E>
+ implements ListIterable<E>
+{
+ private final ListIterable<? extends ListIterable<E>> iterables;
+
+
+ /**
+ * Construct a list iterable with the specified list of list iterables.
+ */
+ public CompositeListIterable(List<ListIterable<E>> iterables) {
+ this(new ListListIterable<ListIterable<E>>(iterables));
+ }
+
+ /**
+ * Construct a list iterable with the specified list of list iterables.
+ */
+ public CompositeListIterable(ListIterable<? extends ListIterable<E>> iterables) {
+ super();
+ this.iterables = iterables;
+ }
+
+ /**
+ * Construct a list iterable with the specified object prepended
+ * to the specified list.
+ */
+ public CompositeListIterable(E object, List<E> list) {
+ this(object, new ListListIterable<E>(list));
+ }
+
+ /**
+ * Construct a list iterable with the specified object prepended
+ * to the specified list iterable.
+ */
+ @SuppressWarnings("unchecked")
+ public CompositeListIterable(E object, ListIterable<E> iterable) {
+ this(new SingleElementListIterable<E>(object), iterable);
+ }
+
+ /**
+ * Construct a list iterable with the specified object appended
+ * to the specified list.
+ */
+ public CompositeListIterable(List<E> list, E object) {
+ this(new ListListIterable<E>(list), object);
+ }
+
+ /**
+ * Construct a list iterable with the specified object appended
+ * to the specified list iterable.
+ */
+ @SuppressWarnings("unchecked")
+ public CompositeListIterable(ListIterable<E> iterable, E object) {
+ this(iterable, new SingleElementListIterable<E>(object));
+ }
+
+ /**
+ * Construct a list iterable with the specified list iterables.
+ */
+ public CompositeListIterable(ListIterable<E>... iterables) {
+ this(new ArrayListIterable<ListIterable<E>>(iterables));
+ }
+
+ /**
+ * Construct a list iterable with the specified lists.
+ */
+ public CompositeListIterable(List<E>... lists) {
+ this(new TransformationListIterable<List<E>, ListIterable<E>>(new ArrayListIterable<List<E>>(lists)) {
+ @Override
+ protected ListIterable<E> transform(List<E> list) {
+ return new ListListIterable<E>(list);
+ }
+ });
+ }
+
+ /**
+ * combined list iterators
+ */
+ public ListIterator<E> iterator() {
+ return new CompositeListIterator<E>(this.iterators());
+ }
+
+ /**
+ * list iterator of list iterators
+ */
+ protected ListIterator<? extends ListIterator<E>> iterators() {
+ return new TransformationListIterator<ListIterable<E>, ListIterator<E>>(this.iterables()) {
+ @Override
+ protected ListIterator<E> transform(ListIterable<E> next) {
+ return next.iterator();
+ }
+ };
+ }
+
+ /**
+ * list iterator of list iterables
+ */
+ protected ListIterator<? extends ListIterable<E>> iterables() {
+ return this.iterables.iterator();
+ }
+
+ @Override
+ public String toString() {
+ return StringTools.buildToStringFor(this, this.iterables);
+ }
+
+}

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