Examples of org.apache.cocoon.xml.SaxBuffer

org.apache.cocoon.xml.SaxBuffer
A class that can record SAX events and replay them later.
Compared to XMLByteStreamCompiler, this class is many times faster at sending out the recorded SAX events since it doesn't need to convert between byte and char representations etc. On the other hand, its data structure is more complex then a simple byte array, making XMLByteStreamCompiler better in case the recorded SAX should be stored long-term.
Use this class if you need to frequently generate smaller amounts of SAX events, or replay a set of recorded start events immediately.
Both ContentHandler and LexicalHandler are supported, the only exception is that the setDocumentLocator event is not recorded. @author Apache Cocoon Team @version CVS $Id: SaxBuffer.java,v 1.13 2004/05/06 10:09:03 bruno Exp $

        if (this.errorPipeline != null) {
            return this.errorPipeline.process(environment, consumer);
        }


        // Have to buffer events if error handler is specified.
        SaxBuffer buffer = null;
        this.lastConsumer = this.errorHandler == null? consumer: (buffer = new SaxBuffer());
        try {
            connectPipeline(environment);
            return processXMLPipeline(environment);
        } catch (ProcessingException e) {
            buffer = null;
            return processErrorHandler(environment, e, consumer);
        } finally {
            if (buffer != null) {
                try {
                    buffer.toSAX(consumer);
                } catch (SAXException e) {
                    throw new ProcessingException("Failed to execute pipeline.", e);
                }
            }
        }

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            param_name = attr.getValue(I18N_PARAM_NAME_ATTRIBUTE);
            if (param_name == null) {
                param_name = String.valueOf(param_count++);
            }


            param_recorder = new SaxBuffer();
            setFormattingParams(attr);
            current_state = STATE_INSIDE_PARAM;
        } else if (I18N_CHOOSE_ELEMENT.equals(name)) {
            if (current_state != STATE_OUTSIDE) {
                throw new SAXException(

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        if (colonPos != -1) {
            catalogueID = key.substring(0, colonPos);
            key = key.substring(colonPos + 1, key.length());
        }


        final SaxBuffer text = getMessage(catalogueID, key);
        if (text == null) {
            getLogger().warn("Translation not found for attribute " +
                             name + " in element <" + element + ">");
            return untranslated;
        }
        return text.toString();
    }

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     * A default value is returned if message is not found.
     *
     * @return SaxBuffer containing message, or defaultValue if not found.
     */
    private ParamSaxBuffer getMessage(String key, ParamSaxBuffer defaultValue) {
        SaxBuffer value = getMessage(currentCatalogueId, key);
        if (value == null) {
            return defaultValue;
        }


        return new ParamSaxBuffer(value);

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    protected class NewHandler extends Handler {
        public Handler process() throws SAXException {
            switch (event) {
            case EVENT_START_ELEMENT:
                widgetPath = getWidgetId(input.attrs);
                SaxBuffer classBuffer = (SaxBuffer)classes.get(widgetPath);
                if (classBuffer == null) {
                    throwSAXException("New: Class \"" + widgetPath + "\" does not exist.");
                }
                handlers.addFirst(handler);
                handler = nestedHandler;
                classBuffer.toSAX(EffectWidgetReplacingPipe.this);
                handler = (Handler)handlers.removeFirst();
                return this;
            case EVENT_ELEMENT:
                return nullHandler;
            case EVENT_END_ELEMENT:

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            if (localName.equals(WIDGET) || localName.equals(REPEATER_WIDGET)) {
                checkContextWidgetAvailable(qName);
                inWidgetElement = true;
                widgetElementNesting = elementNestingCounter;
                gotStylingElement = false;
                saxBuffer = new SaxBuffer();
                // retrieve widget here, but its XML will only be streamed in the endElement call
                widget = getWidget(attributes);
                repeaterWidget = localName.equals(REPEATER_WIDGET);
                if (repeaterWidget && !(widget instanceof Repeater)) {
                    throw new SAXException("FormsTemplateTransformer: the element \"repeater-widget\" can only be used for repeater widgets.");

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     * {@link SaxBuffer} class. The XMLizable object will be a standalone blurb
     * of SAX events, not producing start/endDocument calls and containing all
     * necessary namespace declarations.
     */
    public static XMLizable compileElementContent(Element element) {
        SaxBuffer saxBuffer = new SaxBuffer();
        DOMStreamer domStreamer = new DOMStreamer();
        domStreamer.setContentHandler(saxBuffer);


        NodeList childNodes = element.getChildNodes();
        for (int i = 0; i < childNodes.getLength(); i++) {

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     * {@link SaxBuffer} class. The XMLizable object will be a standalone blurb
     * of SAX events, not producing start/endDocument calls and containing all
     * necessary namespace declarations.
     */
    public static XMLizable compileElementContent(Element element) {
        SaxBuffer saxBuffer = new SaxBuffer();
        DOMStreamer domStreamer = new DOMStreamer();
        domStreamer.setContentHandler(saxBuffer);


        NodeList childNodes = element.getChildNodes();
        for (int i = 0; i < childNodes.getLength(); i++) {

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            bool = Boolean.TRUE;
        }
        
        if ( bool != null && bool.booleanValue() ) {
            boolean read = false;
            SaxBuffer buffer = new SaxBuffer();
            Exception error = null;
            try {
                
                if ( timeout != null ) {
                    final int milli = timeout.intValue() * 1000;
                    LoaderThread loader = new LoaderThread(this, coplet, buffer);
                    final RunnableManager runnableManager = (RunnableManager)this.manager.lookup( RunnableManager.ROLE );
                    runnableManager.execute( loader );
                    this.manager.release( runnableManager );
                    try {
                        read = loader.join( milli );
                    } catch (InterruptedException ignore) {
                        // ignored
                    }
                    error = loader.exception;
                    if ( error != null && this.getLogger().isWarnEnabled() ) {
                        this.getLogger().warn("Unable to get content of coplet: " + coplet.getId(), error);                        
                    }
                } else {
                    this.streamContent( coplet, buffer );
                    read = true;
                }
            } catch (Exception exception ) {
                error = exception;
                this.getLogger().warn("Unable to get content of coplet: " + coplet.getId(), exception);
            }
            
            if ( read ) {
                buffer.toSAX( contentHandler );
            } else {
                if ( !this.renderErrorContent(coplet, contentHandler, error)) {
                    // FIXME - get correct error message
                    contentHandler.startDocument();
                    XMLUtils.startElement( contentHandler, "p");

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                if (buffers == null) {
                    buffers = new LinkedList();
                }
                buffers.addFirst(saxBuffer);
            }
            saxBuffer = new SaxBuffer();
        }

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