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package com.sun.faces.facelets.tag.jsf;
import com.sun.faces.config.WebConfiguration;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.EnableMissingResourceLibraryDetection;
import com.sun.faces.facelets.tag.TagLibraryImpl;
import com.sun.faces.util.FacesLogger;
import javax.faces.FacesException;
import javax.faces.application.Resource;
import javax.faces.application.ResourceHandler;
import javax.faces.context.FacesContext;
import javax.faces.view.facelets.ComponentConfig;
import javax.faces.view.facelets.TagConfig;
import javax.faces.view.facelets.TagHandler;
import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
public class CompositeComponentTagLibrary extends TagLibraryImpl {
private static final Logger LOGGER = FacesLogger.FACELETS_COMPONENT.getLogger();
public CompositeComponentTagLibrary(String ns) {
super(ns);
if (null == ns) {
throw new NullPointerException();
}
this.ns = ns;
this.init();
}
public CompositeComponentTagLibrary(String ns, String compositeLibraryName) {
super(ns);
if (null == ns) {
throw new NullPointerException();
}
this.ns = ns;
if (null == compositeLibraryName) {
throw new NullPointerException();
}
this.compositeLibraryName = compositeLibraryName;
this.init();
}
private void init() {
WebConfiguration webconfig = WebConfiguration.getInstance();
enableMissingResourceLibraryDetection =
webconfig.isOptionEnabled(EnableMissingResourceLibraryDetection);
}
private String ns = null;
private String compositeLibraryName;
private boolean enableMissingResourceLibraryDetection;
public boolean containsTagHandler(String ns, String localName) {
boolean result = false;
Resource ccResource = null;
if (null != (ccResource =
getCompositeComponentResource(ns, localName))) {
InputStream componentStream = null;
try {
componentStream = ccResource.getInputStream();
} catch (IOException ex) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, ex.toString(), ex);
}
}
result = (componentStream != null);
}
return result || super.containsTagHandler(ns, localName);
}
private Resource getCompositeComponentResource(String ns, String localName) {
Resource ccResource = null;
if (ns.equals(this.ns)) {
FacesContext context = FacesContext.getCurrentInstance();
String libraryName = getCompositeComponentLibraryName(this.ns);
if (null != libraryName) {
String ccName = localName + ".xhtml";
// PENDING: there has to be a cheaper way to test for existence
ResourceHandler resourceHandler = context.getApplication().getResourceHandler();
ccResource = resourceHandler.
createResource(ccName, libraryName);
}
}
return ccResource;
}
public TagHandler createTagHandler(String ns, String localName, TagConfig tag) throws FacesException {
TagHandler result = super.createTagHandler(ns, localName, tag);
if (result == null) {
ComponentConfig componentConfig =
new ComponentConfigWrapper(tag, CompositeComponentImpl.TYPE, null);
result = new CompositeComponentTagHandler(
getCompositeComponentResource(ns, localName),
componentConfig);
}
return result;
}
private static final String NS_COMPOSITE_COMPONENT_PREFIX =
"http://java.sun.com/jsf/composite/";
public boolean tagLibraryForNSExists(String toTest) {
boolean result = false;
String resourceId = null;
if (null != (resourceId = getCompositeComponentLibraryName(toTest))) {
if (enableMissingResourceLibraryDetection) {
result = FacesContext.getCurrentInstance().getApplication().
getResourceHandler().libraryExists(resourceId);
} else {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, "Skipping call to libraryExists(). Please set context-param {0} to true to verify if library {1} actually exists", new Object[]{EnableMissingResourceLibraryDetection.getQualifiedName(), toTest});
}
result = true;
}
}
return result;
}
public static boolean scriptComponentForResourceExists(FacesContext context,
Resource componentResource) {
boolean result = false;
Resource scriptComponentResource = context.getApplication().getViewHandler().getViewDeclarationLanguage(context, context.getViewRoot().getViewId()).getScriptComponentResource(context,
componentResource);
try {
result = (null != scriptComponentResource) && (null != scriptComponentResource.getInputStream());
} catch (IOException ex) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, ex.toString(), ex);
}
}
return result;
}
private String getCompositeComponentLibraryName(String toTest) {
String resourceId = null;
if (null != compositeLibraryName) {
resourceId = compositeLibraryName;
}
else {
int resourceIdIndex;
if (-1 != (resourceIdIndex = toTest.indexOf(NS_COMPOSITE_COMPONENT_PREFIX))) {
resourceIdIndex += NS_COMPOSITE_COMPONENT_PREFIX.length();
if (resourceIdIndex < toTest.length()) {
resourceId = toTest.substring(resourceIdIndex);
}
}
}
return resourceId;
}
}