/*
============================================================================
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 modifica-
tion, 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 acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Apache Cocoon" 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 name, 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 (INCLU-
DING, 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 and was originally created by
Stefano Mazzocchi <stefano@apache.org>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.cocoon.woody.datatype;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.apache.cocoon.woody.Constants;
import org.apache.cocoon.woody.datatype.convertor.Convertor;
import org.apache.cocoon.woody.datatype.convertor.DefaultFormatCache;
import org.apache.cocoon.components.sax.XMLByteStreamInterpreter;
import org.apache.cocoon.xml.AttributesImpl;
import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Locale;
/**
* An implementation of a SelectionList. Create instances of this class by using
* the {@link SelectionListBuilder}. This implementation is called "Static" because
* the items in the list are build once from its source, and then list items are
* cached as part of this object. In contrast, the {@link DynamicSelectionList}
* will retrieve its content from its source each time it's needed.
*/
public class StaticSelectionList implements SelectionList {
/** The datatype to which this selection list belongs */
private Datatype datatype;
private List items = new ArrayList();
private XMLByteStreamInterpreter interpreter = new XMLByteStreamInterpreter();
public StaticSelectionList(Datatype datatype) {
this.datatype = datatype;
}
public Datatype getDatatype() {
return datatype;
}
public void generateSaxFragment(ContentHandler contentHandler, Locale locale) throws SAXException {
Convertor.FormatCache formatCache = new DefaultFormatCache();
contentHandler.startElement(Constants.WI_NS, SELECTION_LIST_EL, Constants.WI_PREFIX_COLON + SELECTION_LIST_EL, Constants.EMPTY_ATTRS);
Iterator itemIt = items.iterator();
while (itemIt.hasNext()) {
SelectionListItem item = (SelectionListItem)itemIt.next();
item.generateSaxFragment(contentHandler, locale, formatCache);
}
contentHandler.endElement(Constants.WI_NS, SELECTION_LIST_EL, Constants.WI_PREFIX_COLON + SELECTION_LIST_EL);
}
public List getItems() {
return items;
}
/**
* Adds a new item to this selection list.
* @param value a value of the correct type (i.e. the type with which this selectionlist is associated)
* @param label a SAX-fragment created using the XMLByteStreamCompiler, can be null
*/
public void addItem(Object value, Object label) {
items.add(new SelectionListItem(value, label));
}
public final class SelectionListItem {
private final Object value;
private final Object label;
public SelectionListItem(Object value, Object label) {
this.value = value;
this.label = label;
}
public Object getValue() {
return value;
}
public void generateSaxFragment(ContentHandler contentHandler, Locale locale, Convertor.FormatCache formatCache)
throws SAXException
{
AttributesImpl itemAttrs = new AttributesImpl();
String stringValue = datatype.getConvertor().convertToString(value, locale, formatCache);
itemAttrs.addCDATAAttribute("value", stringValue);
contentHandler.startElement(Constants.WI_NS, ITEM_EL, Constants.WI_PREFIX_COLON + ITEM_EL, itemAttrs);
contentHandler.startElement(Constants.WI_NS, LABEL_EL, Constants.WI_PREFIX_COLON + LABEL_EL, Constants.EMPTY_ATTRS);
if (label != null) {
interpreter.recycle();
interpreter.setContentHandler(contentHandler);
interpreter.deserialize(label);
} else {
contentHandler.characters(stringValue.toCharArray(), 0, stringValue.length());
}
contentHandler.endElement(Constants.WI_NS, LABEL_EL, Constants.WI_PREFIX_COLON + LABEL_EL);
contentHandler.endElement(Constants.WI_NS, ITEM_EL, Constants.WI_PREFIX_COLON + ITEM_EL);
}
}
}