/*
* $Id: RenderKitImpl.java,v 1.56.4.4 2008/07/13 23:40:26 rlubke Exp $
*/
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// RenderKitImpl.java
package com.sun.faces.renderkit;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseStream;
import javax.faces.context.ResponseWriter;
import javax.faces.render.RenderKit;
import javax.faces.render.Renderer;
import javax.faces.render.ResponseStateManager;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Writer;
import java.util.HashMap;
import java.util.concurrent.ConcurrentHashMap;
import com.sun.faces.RIConstants;
import com.sun.faces.config.WebConfiguration;
import com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter;
import com.sun.faces.renderkit.html_basic.HtmlResponseWriter;
import com.sun.faces.util.MessageUtils;
import com.sun.faces.util.Util;
/**
* <B>RenderKitImpl</B> is a class ...
* <p/>
* <B>Lifetime And Scope</B> <P>
*
* @version $Id: RenderKitImpl.java,v 1.56.4.4 2008/07/13 23:40:26 rlubke Exp $
*/
public class RenderKitImpl extends RenderKit {
private static final String[] SUPPORTED_CONTENT_TYPES_ARRAY =
new String[]{
RIConstants.HTML_CONTENT_TYPE,
RIConstants.XHTML_CONTENT_TYPE,
RIConstants.APPLICATION_XML_CONTENT_TYPE,
RIConstants.TEXT_XML_CONTENT_TYPE
};
private static final String SUPPORTED_CONTENT_TYPES =
RIConstants.HTML_CONTENT_TYPE + ','
+ RIConstants.XHTML_CONTENT_TYPE + ','
+ RIConstants.APPLICATION_XML_CONTENT_TYPE + ','
+ RIConstants.TEXT_XML_CONTENT_TYPE;
/**
* Keys are String renderer family. Values are HashMaps. Nested
* HashMap keys are Strings for the rendererType, and values are the
* Renderer instances themselves.
*/
private ConcurrentHashMap<String, HashMap<Object, Renderer>> rendererFamilies =
new ConcurrentHashMap<String, HashMap<Object, Renderer>>();
private ResponseStateManager responseStateManager =
new ResponseStateManagerImpl();
private WebConfiguration webConfig;
public RenderKitImpl() {
FacesContext context = FacesContext.getCurrentInstance();
webConfig = WebConfiguration.getInstance(context.getExternalContext());
}
public void addRenderer(String family, String rendererType,
Renderer renderer) {
if (family == null) {
String message = MessageUtils.getExceptionMessageString
(MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "family");
throw new NullPointerException(message);
}
if (rendererType == null) {
String message = MessageUtils.getExceptionMessageString
(MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "rendererType");
throw new NullPointerException(message);
}
if (renderer == null) {
String message = MessageUtils.getExceptionMessageString
(MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "renderer");
throw new NullPointerException(message);
}
HashMap<Object,Renderer> renderers = rendererFamilies.get(family);
if (renderers == null) {
renderers = new HashMap<Object,Renderer>();
rendererFamilies.put(family, renderers);
}
renderers.put(rendererType, renderer);
}
public Renderer getRenderer(String family, String rendererType) {
if (rendererType == null) {
String message = MessageUtils.getExceptionMessageString
(MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "rendererType");
throw new NullPointerException(message);
}
if (family == null) {
String message = MessageUtils.getExceptionMessageString
(MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "family");
throw new NullPointerException(message);
}
assert(rendererFamilies != null);
HashMap<Object, Renderer> renderers = rendererFamilies.get(family);
return ((renderers != null) ? renderers.get(rendererType) : null);
}
public synchronized ResponseStateManager getResponseStateManager() {
if (responseStateManager == null) {
responseStateManager = new ResponseStateManagerImpl();
}
return responseStateManager;
}
public ResponseWriter createResponseWriter(Writer writer,
String desiredContentTypeList,
String characterEncoding) {
if (writer == null) {
return null;
}
String contentType = null;
boolean contentTypeNullFromResponse = false;
FacesContext context = FacesContext.getCurrentInstance();
// Step 1: Check the content type passed into this method
if (null != desiredContentTypeList) {
contentType = findMatch(
desiredContentTypeList,
SUPPORTED_CONTENT_TYPES_ARRAY);
}
// Step 2: Check the response content type
if (null == desiredContentTypeList) {
desiredContentTypeList =
context.getExternalContext().getResponseContentType();
if (null != desiredContentTypeList) {
contentType = findMatch(
desiredContentTypeList,
SUPPORTED_CONTENT_TYPES_ARRAY);
if (null == contentType) {
contentTypeNullFromResponse = true;
}
}
}
// Step 3: Check the Accept Header content type
// Evaluate the accept header in accordance with HTTP specification -
// Section 14.1
// Preconditions for this (1 or 2):
// 1. content type was not specified to begin with
// 2. an unsupported content type was retrieved from the response
if (null == desiredContentTypeList || contentTypeNullFromResponse) {
String[] typeArray =
context.getExternalContext().getRequestHeaderValuesMap().get("Accept");
if (typeArray.length > 0) {
StringBuffer buff = new StringBuffer();
buff.append(typeArray[0]);
for (int i = 1, len = typeArray.length; i < len; i++) {
buff.append(',');
buff.append(typeArray[i]);
}
desiredContentTypeList = buff.toString();
}
if (null != desiredContentTypeList) {
if (webConfig.isOptionEnabled(BooleanWebContextInitParameter.PreferXHTMLContentType)) {
desiredContentTypeList = RenderKitUtils.determineContentType(
desiredContentTypeList, SUPPORTED_CONTENT_TYPES, RIConstants.XHTML_CONTENT_TYPE);
} else {
desiredContentTypeList = RenderKitUtils.determineContentType(
desiredContentTypeList, SUPPORTED_CONTENT_TYPES, null);
}
if (null != desiredContentTypeList) {
contentType = findMatch(
desiredContentTypeList,
SUPPORTED_CONTENT_TYPES_ARRAY);
}
}
}
// Step 4: Default to text/html
if (contentType == null) {
if (null == desiredContentTypeList) {
contentType = RIConstants.HTML_CONTENT_TYPE;
} else {
String[] desiredContentTypes = contentTypeSplit(desiredContentTypeList);
for (String desiredContentType : desiredContentTypes) {
if (RIConstants.ALL_MEDIA.equals(desiredContentType.trim())) {
contentType = RIConstants.HTML_CONTENT_TYPE;
}
}
}
}
if (null == contentType) {
throw new IllegalArgumentException(MessageUtils.getExceptionMessageString(
MessageUtils.CONTENT_TYPE_ERROR_MESSAGE_ID));
}
if (characterEncoding == null) {
characterEncoding = RIConstants.CHAR_ENCODING;
}
boolean scriptHiding = webConfig
.isOptionEnabled(BooleanWebContextInitParameter.EnableJSStyleHiding);
boolean scriptInAttributes = webConfig
.isOptionEnabled(BooleanWebContextInitParameter.EnableScriptInAttributeValue);
WebConfiguration.DisableUnicodeEscaping escaping = WebConfiguration
.DisableUnicodeEscaping
.getByValue(webConfig.getOptionValue(WebConfiguration.WebContextInitParameter.DisableUnicodeEscaping));
return new HtmlResponseWriter(writer,
contentType,
characterEncoding,
scriptHiding,
scriptInAttributes,
escaping);
}
private String[] contentTypeSplit(String contentTypeString) {
String[] result = Util.split(contentTypeString, ",");
for (int i = 0; i < result.length; i++) {
int semicolon = result[i].indexOf(";");
if (-1 != semicolon) {
result[i] = result[i].substring(0, semicolon);
}
}
return result;
}
// Helper method that returns the content type if the desired content type is found in the
// array of supported types.
private String findMatch(String desiredContentTypeList,
String[] supportedTypes) {
String contentType = null;
String[] desiredTypes = contentTypeSplit(desiredContentTypeList);
// For each entry in the desiredTypes array, look for a match in
// the supportedTypes array
for (int i = 0, ilen = desiredTypes.length; i < ilen; i++) {
String curDesiredType = desiredTypes[i];
for (int j = 0, jlen = supportedTypes.length; j < jlen; j++) {
String curContentType = supportedTypes[j].trim();
if (curDesiredType.contains(curContentType)) {
if (curContentType.contains(RIConstants.HTML_CONTENT_TYPE)) {
contentType = RIConstants.HTML_CONTENT_TYPE;
} else
if (curContentType.contains(RIConstants.XHTML_CONTENT_TYPE) ||
curContentType.contains(RIConstants.APPLICATION_XML_CONTENT_TYPE) ||
curContentType.contains(RIConstants.TEXT_XML_CONTENT_TYPE)) {
contentType = RIConstants.XHTML_CONTENT_TYPE;
}
break;
}
}
if (null != contentType) {
break;
}
}
return contentType;
}
public ResponseStream createResponseStream(OutputStream out) {
final OutputStream output = out;
return new ResponseStream() {
public void write(int b) throws IOException {
output.write(b);
}
public void write(byte b[]) throws IOException {
output.write(b);
}
public void write(byte b[], int off, int len) throws IOException {
output.write(b, off, len);
}
public void flush() throws IOException {
output.flush();
}
public void close() throws IOException {
output.close();
}
};
}
// The test for this class is in TestRenderKit.java
} // end of class RenderKitImpl