/**
* License Agreement.
*
* Rich Faces - Natural Ajax for Java Server Faces (JSF)
*
* Copyright (C) 2007 Exadel, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.ajax4jsf.renderkit;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.StringBufferInputStream;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;
import javax.faces.FacesException;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.ajax4jsf.Messages;
import org.ajax4jsf.renderkit.RendererUtils.HTML;
import org.richfaces.ui.component.DummyHighLight;
import org.richfaces.ui.component.Highlight;
import org.richfaces.ui.component.HighlightImpl;
import org.richfaces.ui.component.UIInsert;
/**
* @author asmirnov
*
*/
public abstract class AbstractInsertRenderer extends
HeaderResourcesRendererBase {
private static final Object ERROR_MESSAGE_CLASS = "dr-insert-error";
public void renderContent(FacesContext context, UIInsert component)
throws IOException {
String src = component.getSrc();
boolean isSrcAvailable = (src != null);
String content = component.getContent();
boolean isContentAvailable = (content != null);
if (isSrcAvailable && isContentAvailable) {
throw new FacesException(UIInsert.ILLEGAL_ATTRIBUTE_VALUE_MESSAGE);
}
if (isSrcAvailable || isContentAvailable) {
ExternalContext externalContext = context.getExternalContext();
InputStream inputStream = null;
if (isSrcAvailable) {
inputStream = externalContext.getResourceAsStream(src);
} else if (isContentAvailable) {
inputStream = new ByteArrayInputStream(content.getBytes());
}
if (null != inputStream) {
renderStream(context, component, inputStream);
} else {
String errorContent = component.getErrorContent();
if ((null != errorContent)
&& (null != (inputStream = externalContext.getResourceAsStream(errorContent)))) {
// Render default content, if src not found.
renderStream(context, component, inputStream);
} else {
// Render error message for a not found resource.
renderErrorMessage(context, component, "UI_INSERT_RESOURCE_NOT_FOUND");
}
}
} else {
throw new FacesException("Attribute 'scr' for a component <rich:insert> " + component.getClientId(context)
+ " must be set");
}
}
/**
* @param context
* @param component
* @param message
* TODO
* @throws IOException
*/
private void renderErrorMessage(FacesContext context, UIInsert component, String message)
throws IOException {
ResponseWriter writer = context.getResponseWriter();
writer.startElement(HTML.SPAN_ELEM, component);
writer.writeAttribute(HTML.class_ATTRIBUTE,
ERROR_MESSAGE_CLASS, null);
writer.write(Messages.getMessage(
message, new Object[] {
component.getClientId(context),
component.getSrc() }));
writer.endElement(HTML.SPAN_ELEM);
}
/**
* @param context
* @param component
* @param inputStream
* @throws UnsupportedEncodingException
* @throws FacesException
* @throws IOException
*/
private void renderStream(FacesContext context, UIInsert component,
InputStream inputStream) throws UnsupportedEncodingException,
FacesException, IOException {
ResponseWriter writer = context.getResponseWriter();
String encoding = component.getEncoding();
if (null == component.getHighlight()) {
InputStreamReader in;
if (null != encoding) {
in = new InputStreamReader(inputStream, encoding);
} else {
in = new InputStreamReader(inputStream);
}
char[] temp = new char[1024];
try {
int bytes;
while ((bytes = in.read(temp)) > 0) {
writer.write(temp, 0, bytes);
}
} catch (IOException e) {
throw new FacesException(e);
} finally {
in.close();
}
} else {
Highlight highlighter;
try {
highlighter = new HighlightImpl(component.getHighlight());
} catch (NoClassDefFoundError e) {
renderErrorMessage(context, component, "HIGHLIGHT_LIBRARY_NOT_FOUND");
highlighter = new DummyHighLight();
}
try {
highlighter.highlight(component.getSrc(), inputStream, writer,
encoding);
} catch (IOException e) {
throw new FacesException(e);
} finally {
inputStream.close();
}
}
}
}