bruno 2003/06/26 08:33:11
Added: src/blocks/woody/java/org/apache/cocoon/woody/datatype
DynamicSelectionList.java
Log:
initial commit
Revision Changes Path
1.1
cocoon-2.1/src/blocks/woody/java/org/apache/cocoon/woody/datatype/DynamicSelectionList.java
Index: DynamicSelectionList.java
===================================================================
/*
============================================================================
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
[EMAIL PROTECTED]
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 <[EMAIL PROTECTED]>. 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.xml.sax.Attributes;
import org.apache.avalon.framework.component.ComponentManager;
import org.apache.excalibur.source.SourceResolver;
import org.apache.excalibur.source.Source;
import org.apache.cocoon.components.source.SourceUtil;
import org.apache.cocoon.xml.AttributesImpl;
import org.apache.cocoon.xml.AbstractXMLPipe;
import org.apache.cocoon.woody.Constants;
import java.util.Locale;
/**
* SelectionList implementation that always reads its content from the source
* each time it is requested.
*/
public class DynamicSelectionList implements SelectionList {
private String src;
private Datatype datatype;
private ComponentManager componentManager;
public DynamicSelectionList(Datatype datatype, String src, ComponentManager
componentManager) {
this.datatype = datatype;
this.src = src;
this.componentManager = componentManager;
}
public Datatype getDatatype() {
return datatype;
}
public void generateSaxFragment(ContentHandler contentHandler, Locale locale)
throws SAXException {
SourceResolver sourceResolver = null;
Source source = null;
try {
sourceResolver =
(SourceResolver)componentManager.lookup(SourceResolver.ROLE);
source = sourceResolver.resolveURI(src);
SelectionListHandler handler = new SelectionListHandler(locale);
handler.setContentHandler(contentHandler);
SourceUtil.toSAX(source, handler);
} catch (Exception e) {
throw new SAXException("Error while generating selection list: " +
e.getMessage(), e);
} finally {
if (sourceResolver != null) {
if (source != null)
try { sourceResolver.release(source); } catch (Exception e) {}
componentManager.release(sourceResolver);
}
}
}
/**
* XMLConsumer used to handle selection lists generated on the fly.
*/
public class SelectionListHandler extends AbstractXMLPipe {
private Object currentValue;
private boolean hasLabel;
private Locale locale;
public SelectionListHandler(Locale locale) {
this.locale = locale;
}
public void startDocument()
throws SAXException {
}
public void endDocument()
throws SAXException {
}
public void endDTD()
throws SAXException {
}
public void startDTD(String name, String publicId, String systemId)
throws SAXException {
}
public void startElement(String namespaceURI, String localName, String
qName, Attributes attributes)
throws SAXException {
if (namespaceURI.equals(Constants.WD_NS)) {
if (localName.equals("item")) {
hasLabel = false;
String unparsedValue = attributes.getValue("value");
if (unparsedValue == null)
throw new SAXException("Missing value attribute on " + qName
+ " element.");
currentValue = datatype.convertFromString(unparsedValue);
if (currentValue == null)
throw new SAXException("Could not interpret the following
value: \"" + unparsedValue + "\".");
AttributesImpl attrs = new AttributesImpl();
// currently the duo convertFromString and convertToString here
seems meaningless,
// but in the future the formats of input and output could change
attrs.addCDATAAttribute("value",
datatype.convertToString(currentValue));
super.startElement(Constants.WI_NS, localName,
Constants.WI_PREFIX_COLON + localName, attrs);
} else if (localName.equals("label")) {
hasLabel = true;
super.startElement(Constants.WI_NS, localName,
Constants.WI_PREFIX_COLON + localName, attributes);
} else if (localName.equals("selection-list")) {
super.startElement(Constants.WI_NS, localName,
Constants.WI_PREFIX_COLON + localName, attributes);
} else {
super.startElement(namespaceURI, localName, qName, attributes);
}
} else {
super.startElement(namespaceURI, localName, qName, attributes);
}
}
private static final String LABEL_EL = "label";
public void endElement(String namespaceURI, String localName, String qName)
throws SAXException {
if (namespaceURI.equals(Constants.WD_NS)) {
if (localName.equals("item")) {
if (!hasLabel) {
// make the label now
super.startElement(Constants.WI_NS, LABEL_EL,
Constants.WI_PREFIX_COLON + LABEL_EL, new AttributesImpl());
String label =
datatype.convertToStringLocalized(currentValue, locale);
super.characters(label.toCharArray(), 0, label.length());
super.endElement(Constants.WI_NS, LABEL_EL,
Constants.WI_PREFIX_COLON + LABEL_EL);
}
super.endElement(Constants.WI_NS, localName,
Constants.WI_PREFIX_COLON + localName);
} else if (localName.equals("label")) {
super.endElement(Constants.WI_NS, localName,
Constants.WI_PREFIX_COLON + localName);
} else if (localName.equals("selection-list")) {
super.endElement(Constants.WI_NS, localName,
Constants.WI_PREFIX_COLON + localName);
} else {
super.endElement(namespaceURI, localName, qName);
}
} else {
super.endElement(namespaceURI, localName, qName);
}
}
}
}
