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This is the master POM file for Oracle's Implementation of the JSF 2.1 Specification.
/*
* $Id: SelectItemsIterator.java,v 1.17.4.1 2008/01/08 22:27:27 rlubke Exp $
*/
/*
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*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
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*
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* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
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package javax.faces.component;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Map;
import java.util.ArrayList;
import java.util.ListIterator;
import java.util.Collection;
import javax.faces.model.SelectItem;
/**
* Package private class for iterating over the set of {@link SelectItem}s
* for a parent {@link UISelectMany} or {@link UISelectOne}.
*/
final class SelectItemsIterator implements Iterator {
// ------------------------------------------------------------ Constructors
/**
* Construct an iterator instance for the specified parent component.
*
* @param parent The parent {@link UIComponent} whose children will be
* processed
*/
public SelectItemsIterator(UIComponent parent) {
kids = parent.getChildren().listIterator();
}
// ------------------------------------------------------ Instance Variables
/**
* Iterator over the SelectItem elements pointed at by a
* UISelectItems component, or null.
*/
private Iterator items = null;
/**
* Iterator over the children of the parent component.
*/
private ListIterator kids = null;
// -------------------------------------------------------- Iterator Methods
/**
* Return true if the iteration has more elements.
*/
public boolean hasNext() {
if (items != null) {
if (items.hasNext()) {
return (true);
} else {
items = null;
}
}
Object next = findNextValidChild();
if (next != null) {
kids.previous();
return true;
}
return false;
}
/**
* Return the next element in the iteration.
*
* @throws NoSuchElementException if there are no more elements
*/
@SuppressWarnings({"unchecked"})
public SelectItem next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
if (items != null) {
return (items.next());
}
UIComponent kid = (UIComponent) findNextValidChild();
if (kid instanceof UISelectItem) {
UISelectItem ui = (UISelectItem) kid;
SelectItem item = (SelectItem) ui.getValue();
if (item == null) {
item = new SelectItem(ui.getItemValue(),
ui.getItemLabel(),
ui.getItemDescription(),
ui.isItemDisabled(),
ui.isItemEscaped());
}
return (item);
} else if (kid instanceof UISelectItems) {
UISelectItems ui = (UISelectItems) kid;
Object value = ui.getValue();
if (value instanceof SelectItem) {
return ((SelectItem)value);
} else if (value instanceof SelectItem[]) {
items = Arrays.asList((SelectItem[]) value).iterator();
return (next());
} else if (value instanceof Collection) {
items = ((Collection) value).iterator();
return (next());
} else if (value instanceof Map) {
List list = new ArrayList(((Map) value).size());
for (Iterator keys = ((Map) value).keySet().iterator();
keys.hasNext(); ) {
Object key = keys.next();
if (key == null) {
continue;
}
Object val = ((Map) value).get(key);
if (val == null) {
continue;
}
list.add(new SelectItem(val, key.toString(),
null));
}
items = list.iterator();
return (next());
} else {
throw new IllegalArgumentException();
}
} else {
throw new NoSuchElementException();
}
}
/**
* Throw UnsupportedOperationException.
*/
public void remove() {
throw new UnsupportedOperationException();
}
private Object findNextValidChild() {
if (kids.hasNext()) {
Object next = kids.next();
while (kids.hasNext() && !(next instanceof UISelectItem || next instanceof UISelectItems)) {
next = kids.next();
}
if (next instanceof UISelectItem || next instanceof UISelectItems) {
return next;
}
}
return null;
}
}
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